CN112019017B - Drive control method, apparatus, home appliance, and computer-readable storage medium - Google Patents
Drive control method, apparatus, home appliance, and computer-readable storage medium Download PDFInfo
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- CN112019017B CN112019017B CN201910472230.0A CN201910472230A CN112019017B CN 112019017 B CN112019017 B CN 112019017B CN 201910472230 A CN201910472230 A CN 201910472230A CN 112019017 B CN112019017 B CN 112019017B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/26—Power factor control [PFC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention provides a drive control method, a device, an electric home appliance and a computer readable storage medium, wherein the drive control method comprises the following steps: detecting input power and output power corresponding to the power supply signal, wherein the output power is recorded as load power; determining a change rate of a bus signal in the power supply signal according to the input power and the load power; and controlling the switching device to operate in a first mode or a second mode according to the change rate of the bus signal, wherein the first mode is configured to control the switching device to be turned off, and the second mode is configured to control the switching device to operate according to a specified pulse driving signal so that a given current in the second mode follows an alternating voltage input to the load. By the technical scheme, the working efficiency of driving the load to operate is improved, and the circuit power consumption and the hardware loss are reduced.
Description
Technical Field
The present invention relates to the field of drive control, and more particularly, to a drive control method, a drive control apparatus, a home appliance, and a computer-readable storage medium.
Background
PFC (Power Factor Correction) technology is widely applied to a drive control circuit, and has the main effect of improving the electricity utilization efficiency of electric equipment (load).
In the related art, PWM (Pulse-Width Modulation) is generally used to drive a switching tube to turn on or off, and a common PFC module includes a Boost PFC module and a bridgeless totem pole PFC module, where the two PFC modules have at least the following technical defects when driving a load:
(1) The circuit structure of the Boost PFC module is simple, namely, the charging and discharging processes of the inductor are controlled through the switching tube, but the efficiency of the Boost PFC module is low, and the switching loss is large.
(2) The efficiency of the bridgeless totem pole type PFC module is higher than that of the Boost type PFC module, but the bridgeless totem pole type PFC module usually works in a high-frequency or power frequency mode, which not only results in high hardware loss and high power consumption of a drive control circuit, but also is unfavorable for further improving the energy efficiency of a load.
Furthermore, any discussion of the background art throughout the specification is not an admission that such background art is necessarily prior art to that of ordinary skill in the art, and that any discussion of the prior art throughout the specification is not an admission that such prior art is widely known or forms part of the common general knowledge in the field.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, an object of the present invention is to propose a drive control method.
Another object of the present invention is to provide a drive control apparatus.
It is yet another object of the present invention to provide a home appliance.
It is a further object of the invention to propose a computer readable storage medium.
In a first aspect of the present invention, a driving control method is provided, including: detecting input power and output power corresponding to the power supply signal, wherein the output power is recorded as load power; determining a change rate of a bus signal in the power supply signal according to the input power and the load power; and controlling the switching device to operate in a first mode or a second mode according to the change rate of the bus signal, wherein the first mode is configured to control the switching device to be turned off, and the second mode is configured to control the switching device to operate according to a specified pulse driving signal so that a given current in the second mode follows an alternating voltage input to the load.
In the technical scheme, the switching device is controlled to work in a first mode or a second mode through the change rate of the bus signal, wherein the first mode is configured to be a mode for controlling the switching device to be cut off, in the first mode, the driving signal is stopped from being sent to the switching device so as to reduce the power consumption and the hardware loss of the switching device, and as the operation duration of the load is prolonged, the second mode is required to be operated to boost the load and correct the power factor of the load, and correspondingly, the second mode is configured to be a mode in which the switching device works according to a specified pulse driving signal so that a given current in the second mode follows the power supply signal.
Specifically, the change rate of the bus signal mainly depends on the input power and the output power of the load, where the input power mainly depends on the voltage, the load current and the given current of the power supply signal, and the output power mainly depends on the magnitude of the load capacity (corresponding to the running power consumption), for example, in the case that the input power is the same, if the load capacity is low, the output power is small, in the first mode, the change rate of the power supply signal drop is small, in the second mode, the change rate of the power supply signal rise is large, and correspondingly, if the load capacity is high, the output power is large, in the first mode, the change rate of the power supply signal drop is large, and in the second mode, the change rate of the power supply signal rise is small.
The pulse driving signal includes, but is not limited to, pulse width, duty ratio, switching frequency, and the like.
Further, as can be understood by those skilled in the art, the normal operation of the load can be ensured in both the first mode and the second mode, that is, one switching point between the first mode and the second mode corresponds to the maximum threshold value of the bus signal, the other switching point between the first mode and the second mode corresponds to the minimum threshold value of the bus signal, and the duration of the first mode and the duration of the second mode depend on the change rate of the bus signal, so that the duration of the first mode is increased as much as possible under the premise of ensuring that the load operates normally, thereby effectively reducing the working time, the turn-on times, the hardware loss and the failure rate of the switching device.
Wherein the load amount depends on at least one parameter of the current, the power, the operating pressure and the frequency of the load.
Finally, if the load is a motor, the power supply signal in the driving control circuit of the motor may be a bus signal or an ac signal, the ac signal is a signal at the input side of the rectifying module, and the bus signal is a signal at the output side of the rectifying module.
In addition, the driving control method according to the above embodiment of the present invention may further have the following additional technical features:
In the foregoing technical solution, optionally, the power supply signal includes a bus signal, a capacitive element is connected between the switching device and the load, the bus signal is configured to charge the capacitive element, a charging voltage of the capacitive element is configured to drive the load to operate, and the determining the rate of change of the power supply signal according to the input power and the load power specifically includes: detecting the current of the load, and determining the load power according to the current calculation of the load; calculating a difference between the input power and the load power, the difference being configured as a charging power of the capacitive element; and determining the change rate of the bus signal according to the charging power.
In the technical scheme, the capacitive element is connected between the switching device and the load to reduce the impact of power supply signal conversion on the load, namely, the power supply signal can charge the capacitive element, and the charging voltage of the capacitive element supplies power to the load, so that the load power is determined by detecting the load current, further, the charging power of the capacitive element is determined according to the load power and the input power, the charging power corresponds to the voltage change rate, and the power supply signal is subjected to threshold monitoring, in a first mode, the power supply signal is optimally reduced from the maximum threshold to the minimum threshold, and in a second mode, the power supply signal is increased from the minimum threshold to the maximum threshold, so that the operating frequency of the switching device is ensured to be low, and the normal operation of the load is ensured.
In the above technical solution, optionally, the controlling the switching device to operate in the first mode or the second mode according to the rate of change of the bus signal specifically includes: and determining a working period corresponding to the first mode and a working period corresponding to the second mode according to the change rate of the bus signal, wherein the switching time between the first mode and the second mode is a designated time corresponding to an alternating current signal in the power supply signal.
In this technical scheme, optionally, the switching moment between first mode and the second mode is the zero crossing point moment of power supply signal, can reduce impulse current like this when switching mode work, in addition, is favorable to reducing harmonic signal, and then further promotes drive control circuit's reliability and life.
In any of the foregoing solutions, optionally, the ac signal in the power supply signal is a continuous signal, and the ac signal includes positive half-cycle signals and negative half-cycle signals that are alternately distributed, a working period corresponding to the first mode includes an integer number of half-cycle duration, and/or a working period corresponding to the second mode includes an integer number of half-cycle duration, where the half-cycle duration includes duration of the positive half-cycle signal and duration of the negative half-cycle signal.
In this technical solution, when the pulse driving signal is output to the switching device in the second mode, a given current needs to be applied, so as to reduce the impact of the given current on the circuit hardware, and therefore, the starting time and the ending time of the second mode are both set to be zero crossing time, that is, the working period of the second mode includes an integer number of half cycles.
In any of the above solutions, optionally, the method further includes: if the switching device works in the first mode, detecting bus signals in the power supply signals in real time; judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value; and if the bus signal detected in real time is smaller than or equal to the first bus signal threshold value, controlling the switching device to switch to the second mode to work.
In the technical scheme, when the switching device works in the first mode, namely the switching device is in a cut-off state, the capacitive element supplies power to the load, so that the voltage of the capacitive element is in a descending trend, when a power supply signal detected in real time is smaller than or equal to a first power supply signal threshold value, the capacitive element is insufficient to supply power to the load, a pulse driving signal needs to be output to the switching device, the switching device is required to switch to a second mode to work at the moment, and the power supply signal is controlled to supply power to the load.
The first power supply signal threshold value is larger than or equal to the minimum threshold value of the bus signal.
In any of the above solutions, optionally, the method further includes: if the switching device works in the second mode, detecting the power supply signal in real time; judging whether the power supply signal is larger than or equal to a second power supply signal threshold value; and if the power supply signal is larger than or equal to the second power supply signal threshold value, controlling the switching device to switch to the first mode to work.
In the technical scheme, the switching device works in the second mode, the capacitive element is in an ascending trend, when the power supply signal detected in real time is larger than or equal to the second power supply signal threshold value, the capacitive element can be used for supplying power to a load, the switching device is turned off, namely, the switching device is switched to the first mode to work and starts to supply power to the load, so that the power supply signal is detected in real time and the magnitude relation between the power supply signal and the second power supply signal threshold value is compared, the pulse driving signal is stopped from being output to the switching device, the power consumption and the loss of the switching device are reduced, and meanwhile, the hardware loss and the failure rate of the circuit are further reduced.
The second power supply signal threshold value is smaller than or equal to the maximum threshold value of the bus signal.
In any of the above solutions, optionally, the method further includes: if the switching device works in the first mode, judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is judged to be larger than the first bus signal threshold value, predicting the bus signal in the next period; judging whether the bus signal in the next period is smaller than or equal to the first bus signal threshold value; and if the bus signal in the next period is smaller than or equal to the first bus signal threshold value, controlling the switching device to switch to the second mode to work at the appointed moment.
In the technical scheme, the bridge circuit works in the first mode, the first bus signal threshold value is larger than or equal to the minimum threshold value of the bus signal, so that the bus signal in the next period is predicted, if the bus signal in the next period is judged to be smaller than or equal to the first bus signal threshold value, in order to avoid bus voltage drop, the bridge circuit is switched to the second mode to work at the appointed moment, and optionally, the bridge circuit is switched to the second mode to work at the zero crossing point of the alternating voltage in the next period, so that the interference of the harmonic signal to the circuit is reduced.
In any of the above solutions, optionally, the method further includes: if the switching device works in the second mode, detecting bus signals in the power supply signals in real time; judging whether the bus signal is greater than or equal to a second bus signal threshold value; and if the bus signal is larger than or equal to the second bus signal threshold value, controlling the switching device to switch to the first mode to work.
In the technical scheme, the threshold value of the second power supply signal is smaller than or equal to the maximum threshold value of the bus signal, and the bus voltage continuously rises in the working state of the bridge circuit in the second mode, so that the bridge circuit is controlled to be switched to the first mode at the appointed moment of the power supply signal in order to avoid breakdown of the capacitive element or the switching device, and the load energy efficiency and the reliability of the circuit can be further improved.
Preferably, the designated time is the zero crossing time of the alternating voltage in the current period, such as half-wave zero crossing or full-wave zero crossing, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated in the switching process of the switching device.
In any of the above solutions, optionally, the method further includes: if the switching device works in the second mode, judging whether the bus signal detected in real time is greater than or equal to a second bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is smaller than the second bus signal threshold value, predicting the bus signal in the next period; judging the magnitude relation between the bus signal in the next period and the third bus signal threshold value; and controlling the switching device to switch to the first mode to work at a designated moment according to the magnitude relation between the bus signal in the next period and the third bus signal threshold.
In the technical scheme, if the bus signal is detected to be smaller than the second bus signal threshold value, the first mode does not need to be switched to the second mode immediately, the magnitude relation between the bus signal in the next period and the third bus signal threshold value can be judged in a predictive mode, the appointed moment of switching to the first mode in the next period is determined according to the magnitude relation, and therefore the stability and the reliability of driving load operation are further improved, and voltage fluctuation and harmonic signals are further reduced.
Preferably, the designated time is the zero crossing time of the alternating voltage in the next period, such as half-wave zero crossing or full-wave zero crossing, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated in the switching process of the switching device.
In any of the foregoing solutions, optionally, the driving control circuit further includes a capacitive element, where the capacitive element is connected between the switching device and the load, the capacitive element includes a plurality of electrolytic capacitors connected in series and/or in parallel, or the capacitive element includes a plurality of thin film capacitors connected in series and/or in parallel, and the operation control method further includes: and determining the second bus signal threshold according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching device.
In the technical scheme, the second bus signal threshold is determined according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching tube, so that on one hand, the possibility of breakdown of the capacitive element and the switching tube is reduced, and on the other hand, the moment of switching of the switching tube between the first mode and the second mode is determined by the second bus signal threshold, and the reliability and the load operation energy efficiency of the power factor correction module are further improved.
In any of the above solutions, optionally, the method further includes: detecting the current of the load, and determining the power of the load according to the current calculation of the load; determining the input power of the load corresponding to the given current in the second mode; calculating a difference between the input power and the power of the load, the difference being configured as the charging power; determining the change rate of the bus signal according to the charging power; a minimum value of a given current in the second mode is determined from a rate of change of the bus signal, wherein the given current is configured to control the bus signal to rise.
In the technical scheme, the minimum given current in the second mode is determined according to the voltage change rate, so that the reliability and stability of the rising of the bus voltage are improved, and the reliability of the driving control scheme defined by the embodiment of the application is further improved.
In a second aspect of the present invention, there is provided a drive control apparatus including a processor that implements when executing a computer program: the steps of the driving control method according to any one of the above description, and thus the driving control device has the beneficial technical effects of any one of the above driving control methods, which are not described herein again.
In a third aspect of the present invention, there is provided a home appliance, including: a load; a drive control apparatus according to a second aspect of the present invention; the driving control circuit is controlled by the driving control device, the driving control circuit is provided with a PFC, and the PFC comprises at least one switching device, and the switching device is configured to control a power supply signal to supply power to a load.
In this technical solution, the home appliance includes the driving control device described in the above technical solution, so the home appliance includes all the beneficial effects of the driving control device described in the above technical solution, and will not be described again.
In the above technical solution, optionally, the home appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer host.
In a fourth aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed, implements the steps of the drive control method according to any one of the above-described aspects.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
Fig. 1 shows a flow diagram of a drive control method according to an embodiment of the invention;
FIG. 2 shows a schematic diagram of a drive control current according to one embodiment of the invention;
FIG. 3 shows a schematic diagram of a drive control current according to one embodiment of the invention;
FIG. 4 shows a schematic diagram of a drive control scheme according to one embodiment of the invention;
Fig. 5 shows a timing diagram of a drive control method according to an embodiment of the present invention;
Fig. 6 shows a timing chart of a driving control method according to another embodiment of the present invention;
fig. 7 shows a timing chart of a driving control method according to another embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, a driving control method according to an embodiment of the present invention includes: step S102, detecting input power and output power corresponding to the power supply signal, wherein the output power is recorded as load power; step S104, determining the change rate of bus signals in the power supply signals according to the input power and the load power; and step S106, controlling the switching device to operate in a first mode or a second mode according to the change rate of the bus signal, wherein the first mode is configured to control the switching device to be turned off, and the second mode is configured to control the switching device to operate according to a specified pulse driving signal, so that a given current in the second mode follows an alternating voltage input to the load.
In the technical scheme, the switching device is controlled to work in a first mode or a second mode through the change rate of the bus signal, wherein the first mode is configured to be a mode for controlling the switching device to be cut off, in the first mode, the driving signal is stopped from being sent to the switching device so as to reduce the power consumption and the hardware loss of the switching device, and as the operation duration of the load is prolonged, the second mode is required to be operated to boost the load and correct the power factor of the load, and correspondingly, the second mode is configured to be a mode in which the switching device works according to a specified pulse driving signal so that a given current in the second mode follows the power supply signal.
Specifically, the change rate of the bus signal mainly depends on the input power and the output power of the load, where the input power mainly depends on the voltage, the load current and the given current of the power supply signal, and the output power mainly depends on the magnitude of the load capacity (corresponding to the running power consumption), for example, in the case that the input power is the same, if the load capacity is low, the output power is small, in the first mode, the change rate of the power supply signal drop is small, in the second mode, the change rate of the power supply signal rise is large, and correspondingly, if the load capacity is high, the output power is large, in the first mode, the change rate of the power supply signal drop is large, and in the second mode, the change rate of the power supply signal rise is small.
The pulse driving signal includes, but is not limited to, pulse width, duty ratio, switching frequency, and the like.
Further, as can be understood by those skilled in the art, the normal operation of the load can be ensured in both the first mode and the second mode, that is, one switching point between the first mode and the second mode corresponds to the maximum threshold value of the bus signal, the other switching point between the first mode and the second mode corresponds to the minimum threshold value of the bus signal, and the duration of the first mode and the duration of the second mode depend on the change rate of the bus signal, so that the duration of the first mode is increased as much as possible under the premise of ensuring that the load operates normally, thereby effectively reducing the working time, the turn-on times, the hardware loss and the failure rate of the switching device.
Wherein the load amount depends on at least one parameter of the current, the power, the operating pressure and the frequency of the load.
Finally, if the load is a motor, the power supply signal in the driving control circuit of the motor may be a bus signal or an ac signal, the ac signal is a signal at the input side of the rectifying module, and the bus signal is a signal at the output side of the rectifying module.
In addition, the driving control method according to the above embodiment of the present invention may further have the following additional technical features:
In the foregoing technical solution, optionally, the power supply signal includes a bus signal, a capacitive element is connected between the switching device and the load, the bus signal is configured to charge the capacitive element, a charging voltage of the capacitive element is configured to drive the load to operate, and the determining the rate of change of the power supply signal according to the input power and the load power specifically includes: detecting the current of the load, and determining the load power according to the current calculation of the load; calculating a difference between the input power and the load power, the difference being configured as a charging power of the capacitive element; and determining the change rate of the bus signal according to the charging power.
In the technical scheme, the capacitive element is connected between the switching device and the load to reduce the impact of power supply signal conversion on the load, namely, the power supply signal can charge the capacitive element, and the charging voltage of the capacitive element supplies power to the load, so that the load power is determined by detecting the load current, further, the charging power of the capacitive element is determined according to the load power and the input power, the charging power corresponds to the voltage change rate, and the power supply signal is subjected to threshold monitoring, in a first mode, the power supply signal is optimally reduced from the maximum threshold to the minimum threshold, and in a second mode, the power supply signal is increased from the minimum threshold to the maximum threshold, so that the operating frequency of the switching device is ensured to be low, and the normal operation of the load is ensured.
In the above technical solution, optionally, the controlling the switching device to operate in the first mode or the second mode according to the rate of change of the bus signal specifically includes: and determining a working period corresponding to the first mode and a working period corresponding to the second mode according to the change rate of the bus signal, wherein the switching time between the first mode and the second mode is a designated time corresponding to an alternating current signal in the power supply signal.
In this technical scheme, optionally, the switching moment between first mode and the second mode is the zero crossing point moment of power supply signal, can reduce impulse current like this when switching mode work, in addition, is favorable to reducing harmonic signal, and then further promotes drive control circuit's reliability and life.
In any of the foregoing solutions, optionally, the ac signal in the power supply signal is a continuous signal, and the ac signal includes positive half-cycle signals and negative half-cycle signals that are alternately distributed, a working period corresponding to the first mode includes an integer number of half-cycle duration, and/or a working period corresponding to the second mode includes an integer number of half-cycle duration, where the half-cycle duration includes duration of the positive half-cycle signal and duration of the negative half-cycle signal.
In this technical solution, when the pulse driving signal is output to the switching device in the second mode, a given current needs to be applied, so as to reduce the impact of the given current on the circuit hardware, and therefore, the starting time and the ending time of the second mode are both set to be zero crossing time, that is, the working period of the second mode includes an integer number of half cycles.
In any of the above solutions, optionally, the method further includes: if the switching device works in the first mode, detecting bus signals in the power supply signals in real time; judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value; and if the bus signal detected in real time is smaller than or equal to the first bus signal threshold value, controlling the switching device to switch to the second mode to work.
In the technical scheme, when the switching device works in the first mode, namely the switching device is in a cut-off state, the capacitive element supplies power to the load, so that the voltage of the capacitive element is in a descending trend, when a power supply signal detected in real time is smaller than or equal to a first power supply signal threshold value, the capacitive element is insufficient to supply power to the load, a pulse driving signal needs to be output to the switching device, the switching device is required to switch to a second mode to work at the moment, and the power supply signal is controlled to supply power to the load.
The first power supply signal threshold value is larger than or equal to the minimum threshold value of the bus signal.
In any of the above solutions, optionally, the method further includes: if the switching device works in the second mode, detecting the power supply signal in real time; judging whether the power supply signal is larger than or equal to a second power supply signal threshold value; and if the power supply signal is larger than or equal to the second power supply signal threshold value, controlling the switching device to switch to the first mode to work.
In the technical scheme, the switching device works in the second mode, the capacitive element is in an ascending trend, when the power supply signal detected in real time is larger than or equal to the second power supply signal threshold value, the capacitive element can be used for supplying power to a load, the switching device is turned off, namely, the switching device is switched to the first mode to work and starts to supply power to the load, so that the power supply signal is detected in real time and the magnitude relation between the power supply signal and the second power supply signal threshold value is compared, the pulse driving signal is stopped from being output to the switching device, the power consumption and the loss of the switching device are reduced, and meanwhile, the hardware loss and the failure rate of the circuit are further reduced.
The second power supply signal threshold value is smaller than or equal to the maximum threshold value of the bus signal.
In any of the above solutions, optionally, the method further includes: if the switching device works in the first mode, judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is judged to be larger than the first bus signal threshold value, predicting the bus signal in the next period; judging whether the bus signal in the next period is smaller than or equal to the first bus signal threshold value; and if the bus signal in the next period is smaller than or equal to the first bus signal threshold value, controlling the switching device to switch to the second mode to work at the appointed moment.
In the technical scheme, the bridge circuit works in the first mode, the first bus signal threshold value is larger than or equal to the minimum threshold value of the bus signal, so that the bus signal in the next period is predicted, if the bus signal in the next period is judged to be smaller than or equal to the first bus signal threshold value, in order to avoid bus voltage drop, the bridge circuit is switched to the second mode to work at the appointed moment, and optionally, the bridge circuit is switched to the second mode to work at the zero crossing point of the alternating voltage in the next period, so that the interference of the harmonic signal to the circuit is reduced.
In any of the above solutions, optionally, the method further includes: if the switching device works in the second mode, detecting bus signals in the power supply signals in real time; judging whether the bus signal is greater than or equal to a second bus signal threshold value; and if the bus signal is larger than or equal to the second bus signal threshold value, controlling the switching device to switch to the first mode to work.
In the technical scheme, the threshold value of the second power supply signal is smaller than or equal to the maximum threshold value of the bus signal, and the bus voltage continuously rises in the working state of the bridge circuit in the second mode, so that the bridge circuit is controlled to be switched to the first mode at the appointed moment of the power supply signal in order to avoid breakdown of the capacitive element or the switching device, and the load energy efficiency and the reliability of the circuit can be further improved.
Preferably, the designated time is the zero crossing time of the alternating voltage in the current period, such as half-wave zero crossing or full-wave zero crossing, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated in the switching process of the switching device.
In any of the above solutions, optionally, the method further includes: if the switching device works in the second mode, judging whether the bus signal detected in real time is greater than or equal to a second bus signal threshold value in the power supply signal threshold values; if the bus signal detected in real time is smaller than the second bus signal threshold value, predicting the bus signal in the next period; judging the magnitude relation between the bus signal in the next period and the third bus signal threshold value; and controlling the switching device to switch to the first mode to work at a designated moment according to the magnitude relation between the bus signal in the next period and the third bus signal threshold.
In the technical scheme, if the bus signal is detected to be smaller than the second bus signal threshold value, the first mode does not need to be switched to the second mode immediately, the magnitude relation between the bus signal in the next period and the third bus signal threshold value can be judged in a predictive mode, the appointed moment of switching to the first mode in the next period is determined according to the magnitude relation, and therefore the stability and the reliability of driving load operation are further improved, and voltage fluctuation and harmonic signals are further reduced.
Preferably, the designated time is the zero crossing time of the alternating voltage in the next period, such as half-wave zero crossing or full-wave zero crossing, so as to effectively reduce noise such as harmonic signals and electromagnetic interference generated in the switching process of the switching device.
In any of the foregoing solutions, optionally, the driving control circuit further includes a capacitive element, where the capacitive element is connected between the switching device and the load, the capacitive element includes a plurality of electrolytic capacitors connected in series and/or in parallel, or the capacitive element includes a plurality of thin film capacitors connected in series and/or in parallel, and the operation control method further includes: and determining the second bus signal threshold according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching device.
In the technical scheme, the second bus signal threshold is determined according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching tube, so that on one hand, the possibility of breakdown of the capacitive element and the switching tube is reduced, and on the other hand, the moment of switching of the switching tube between the first mode and the second mode is determined by the second bus signal threshold, and the reliability and the load operation energy efficiency of the power factor correction module are further improved.
In any of the above solutions, optionally, the method further includes: detecting the current of the load, and determining the power of the load according to the current calculation of the load; determining the input power of the load corresponding to the given current in the second mode; calculating a difference between the input power and the power of the load, the difference being configured as the charging power; determining the change rate of the bus signal according to the charging power; a minimum value of a given current in the second mode is determined from a rate of change of the bus signal, wherein the given current is configured to control the bus signal to rise.
In the technical scheme, the minimum given current in the second mode is determined according to the voltage change rate, so that the reliability and stability of the rising of the bus voltage are improved, and the reliability of the driving control scheme defined by the embodiment of the application is further improved.
FIG. 2 shows a schematic diagram of a drive control current according to one embodiment of the invention
As shown in fig. 2, according to one embodiment of the present invention, the driving control circuit is connected between the input terminals of the load and the AC of the grid system, and specifically includes: the bridge rectifier module is used for converting an alternating current signal into a pulsating direct current signal, the Boost type power factor correction module comprises an inductive element L, a switching tube Q and a unidirectional conduction device D, due to the charging and discharging effects of the capacitive element C, the voltage on the capacitive element C presents saw-tooth wave ripple, and the unidirectional conduction device D is conducted only when an AC line voltage instantaneous value is higher than the voltage on the capacitive element due to forward bias in combination with the conduction characteristic of the unidirectional conduction device D, namely, in each period of an AC line input signal, the unidirectional conduction device D is conducted only near a peak value, and the input alternating current voltage presents a sine wave waveform, but a large number of peak pulses exist in the input alternating current, namely harmonic components with low circuit power factors are caused.
Therefore, the Boost type power factor correction module not only can solve the problem of phase difference between alternating voltage and alternating current, but also can solve the problems of electromagnetic interference and electromagnetic compatibility caused by harmonic signals.
Further, in order to further improve the energy efficiency of load operation, for the active Boost type power factor correction module, the working mode of the switching tube is adjusted by combining with the operation parameters of the load, especially when detecting that the electric quantity required for driving the load to operate is low, whether the switching tube works is controlled according to a power supply signal, wherein the power supply signal comprises an alternating current voltage and a bus voltage input by an AC of a power grid system.
Further, if it is determined that the switching tube operates in the second mode, the magnitude relation between the bus voltage and the maximum threshold V dc_max of the bus signal and the magnitude relation between the bus voltage and the minimum threshold V dc_min of the bus signal are further combined to control the output of the pulse driving signal to the switching tube or stop the output of the pulse driving signal to the switching tube.
Specifically, if the bus voltage exceeds the upper voltage threshold, the pulse driving signal is stopped from being output to the switching tube, i.e. the switching tube is switched to the first mode operation, i.e. the switching tube is in an intermittent state, and if the bus voltage is lower than the minimum threshold V dc_min of the bus signal, the pulse driving signal is output to the switching tube, i.e. the switching tube is switched to the second mode operation, i.e. the switching tube is in an operation state, so that the given current I S approximates to a sine wave waveform.
Still further, the switching time between the first mode and the second mode is the zero crossing time of the ac signal, so as to further reduce the spike signal in the drive control circuit.
Fig. 3 shows a schematic diagram of a drive control current according to an embodiment of the invention.
As shown in fig. 3, according to another embodiment of the present invention, a driving control circuit is connected between an AC of a power grid system and an input terminal of a load, and specifically includes: the bridge-free totem pole PFC module comprises an inductive element L, a switching tube and a unidirectional conduction device D, wherein due to the charging and discharging actions of the capacitive element C, the voltage on the capacitive element C presents saw-tooth wave ripple, and the unidirectional conduction device D is combined with the conduction characteristic of the unidirectional conduction device D, the unidirectional conduction device D can conduct due to forward bias only when the instantaneous value of the AC line voltage is higher than the voltage on the capacitive element, namely, in each period of an AC line input signal, the unidirectional conduction device D can conduct only near a peak value, and the input alternating current voltage presents sine wave waveform, but a large amount of spike pulses exist in the input alternating current, namely harmonic components with low circuit power factors are caused.
Therefore, the bridgeless totem pole PFC module not only can solve the problem of phase difference between ac voltage and ac current, but also can solve the problems of electromagnetic interference and electromagnetic compatibility caused by harmonic signals, and in this embodiment, the switching tube includes a first switching tube Q 1, a second switching tube Q 2, a third switching tube Q 3 and a fourth switching tube Q 4, where the first switching tube Q 1 and the second switching tube Q 2 are high-frequency switching tubes, and the third switching tube Q 3 and the fourth switching tube Q 4 are low-frequency switching tubes.
Further, for the purpose of further improving the load operation energy efficiency, for the active bridgeless totem pole PFC module, the working mode of the switching tube is adjusted in combination with the operation parameters of the load, especially when it is detected that the electric quantity required for driving the load to operate is low, whether the switching tube works is controlled according to a power supply signal, where the power supply signal includes an AC voltage and a bus voltage input by an AC of a power grid system.
Further, if it is determined that the switching tube operates in the second mode, the magnitude relation between the bus voltage and the maximum threshold V dc_max of the bus signal and the magnitude relation between the bus voltage and the minimum threshold V dc_min of the bus signal are further combined to control the output of the pulse driving signal to the switching tube or stop the output of the pulse driving signal to the switching tube.
Specifically, if the bus voltage exceeds the upper voltage threshold, the pulse driving signal is stopped from being output to the switching tube, i.e. the switching tube is switched to the first mode operation, i.e. the switching tube is in an intermittent state, and if the bus voltage is lower than the minimum threshold V dc_min of the bus signal, the pulse driving signal is output to the switching tube, i.e. the switching tube is switched to the second mode operation, i.e. the switching tube is in an operation state, so that the given current I S approximates to a sine wave waveform.
Still further, the switching time between the first mode and the second mode is the zero crossing time of the ac signal, so as to further reduce the spike signal in the drive control circuit.
Fig. 4 shows a schematic diagram of a drive control scheme according to an embodiment of the invention.
As shown in fig. 4, in the drive control scheme of the present embodiment, the PI controller performs the steps of:
(1) The first PI controller determines a change rate according to a difference between the bus signal V dc and the bus signal threshold V dcref, so as to determine a gain value I ref_dc of a given current, wherein a product of the gain value and an ac voltage V ac (an absolute value of the ac voltage shown in fig. 4) is the given current, and the given current is subjected to current limiting treatment and then output to the second PI controller.
(2) The second PI controller calculates and determines a pulse driving signal according to the given current and the alternating current I ac, wherein the pulse driving signal comprises a first duty ratio, a second duty ratio, a third duty ratio and a fourth duty ratio, dead time is set between the on time of the first switching tube and the on time of the second switching tube, and in addition, the pulse driving signal also comprises the switching frequency of the switching tube.
The first PI controller and the second PI controller are proportional-integral controllers.
As shown in fig. 5 and fig. 6, for further improving the load operation energy efficiency, for the active bridgeless totem pole PFC module, the operation mode of the switching tube is adjusted in combination with the operation parameters of the load, and particularly when it is detected that the amount of electricity required for driving the load to operate is low, whether the switching tube operates is controlled according to a power supply signal, where the power supply signal includes an AC voltage and a bus voltage input by an AC of a power grid system.
Further, if it is determined that the switching tube operates in the second mode, the magnitude relation between the bus voltage V dc and the maximum threshold V dc_max of the bus signal and the magnitude relation between the bus voltage V dc and the minimum threshold V dc_min of the bus signal are further combined to control the output of the pulse driving signal to the switching tube or stop the output of the pulse driving signal to the switching tube.
Specifically, if the bus voltage V dc exceeds the upper voltage threshold, the output of the pulse driving signal to the switching tube is stopped, i.e., the switching tube is switched to the first mode operation, i.e., the switching tube is in an intermittent state, and if the bus voltage is lower than the minimum threshold V dc_min of the bus signal, the pulse driving signal is output to the switching tube, i.e., the switching tube is switched to the second mode operation, i.e., the switching tube is in an operating state, so that the given current I S approximates to a sine wave waveform.
As shown in fig. 5, the switching time between the first mode and the second mode is the zero crossing time of the ac signal U S, so as to further reduce the harmonic signal in the drive control circuit, so that the given current I S is close to the sine wave waveform.
As shown in fig. 6, the switching timing between the first mode and the second mode is not the zero crossing timing of the ac signal U S, which may cause the harmonic signal in the drive control circuit to be excessively large, which may result in a large distortion of the given current I S.
As shown in fig. 7, when determining at the time T 12 corresponding to a full-wave zero-crossing point according to the sampled value of the bus voltage, the first mode is switched to the second mode, and the bus signal is predicted and sampled according to the law of time variation of the bus signal V dc, optionally, the first bus voltage predicted value V dc_pre1 corresponding to the first half-wave zero-crossing point is predicted after entering the second mode, Comparing the magnitude relation between the first bus voltage predicted value V dc_pre1 and the maximum threshold value V dc_max of the bus signal, if the first bus voltage predicted value V dc_pre1 is determined to be smaller than the maximum threshold value V dc_max of the bus signal, The second mode operation is kept continuously, the first bus voltage predicted value V dc_pre2 is predicted according to the bus signal sampling value V dc_cur of the zero crossing point of the next full wave, the magnitude relation between the second bus voltage predicted value V dc_pre2 and the maximum threshold value V dc_max of the bus signal is compared, If it is determined that the second bus voltage predictor V dc_pre2 is close to the maximum threshold V dc_max of the bus signal, i.e. the difference between the maximum threshold V dc_max of the bus signal and the second bus voltage predictor V dc_pre2 is less than the difference threshold, It is determined to switch to the first mode at a time T 21 corresponding to the zero-crossing point of the other full wave.
An electric home appliance according to an embodiment of the present invention includes: a load; the drive control apparatus according to any one of the above; the driving control circuit is controlled by the driving control device, the driving control circuit is provided with a PFC, and the PFC comprises at least one switching device, and the switching device is configured to control a power supply signal to supply power to a load.
In this technical solution, the home appliance includes the driving control device described in any of the foregoing embodiments, so the home appliance includes all the beneficial effects of the driving control device described in any of the foregoing embodiments, and will not be described again.
In one embodiment of the present invention, optionally, the home appliance includes at least one of an air conditioner, a refrigerator, a fan, a range hood, a dust collector, and a computer host.
In this embodiment, by setting the switching tube to control the power supply signal to supply power to the load, as long as the bus voltage is within the normal variation range, normal operation of the load can be ensured, and on the premise that normal operation of the load can be ensured, a control strategy of a corresponding burst (intermittent oscillation) mode, that is, an intermittent output control strategy, can be set according to the variation of the bus voltage, so that the high-frequency action signal is controlled to be in an intermittent output state through the intermittent output control strategy, that is, the high-frequency action signal is not required to be continuously in an output state, that is, the switching tube is not required to be continuously in a high-frequency action switching state, thereby reducing the conduction power consumption of the power factor correction module in the drive control circuit, and improving the energy efficiency of electrical equipment (such as an air conditioner) adopting the drive control circuit.
Alternatively, the controller may be one of an MCU (Micro-programmed Control Unit, micro program controller), a CPU (Central Processing Unit ), a DSP (DIGITAL SIGNAL Processor, digital signal Processor), and an embedded device, but is not limited thereto.
A computer-readable storage medium according to an embodiment of the present invention has stored thereon a computer program which, when executed, implements the steps of the drive control method according to any one of the above-described claims.
According to the technical scheme, the switching device is controlled to work in a first mode or a second mode through the change rate of the bus signal, wherein the first mode is configured to be a mode for controlling the switching device to be turned off, in the first mode, the driving signal is stopped from being sent to the switching device so as to reduce the power consumption and the hardware loss of the switching device, the second mode is required to be operated to boost the load and correct the power factor of the load along with the increase of the operation duration of the load, and correspondingly, the second mode is configured to be a mode in which the switching device works according to a specified pulse driving signal so that the given current in the second mode follows the power supply signal.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A drive control method, adapted to a drive control circuit provided with at least one switching device configured to control a power supply signal to supply power to a load, characterized by comprising:
detecting input power and output power corresponding to the power supply signal, wherein the output power is recorded as load power;
determining a change rate of a bus signal in the power supply signal according to the input power and the load power;
The switching device is controlled to operate in a first mode or a second mode according to the rate of change of the bus signal,
Wherein the first mode is configured to control a mode in which the switching device is turned off, and the second mode is configured to be a mode in which the switching device operates in accordance with a specified pulse driving signal so that a given current in the second mode follows an alternating-current voltage input to the load;
The power supply signal comprises a bus signal, a capacitive element is connected between the switching device and the load, the bus signal is configured to charge the capacitive element, the charging voltage of the capacitive element is configured to drive the load to operate, and the change rate of the bus signal is determined according to the input power and the load power, and the method specifically comprises the following steps:
Detecting the current of the load, and determining the load power according to the current calculation of the load;
Calculating a difference between the input power and the load power, the difference being configured as a charging power of the capacitive element;
and determining the change rate of the bus signal according to the charging power.
2. The drive control method according to claim 1, characterized in that controlling the switching device to operate in the first mode or the second mode according to the rate of change of the bus signal, specifically comprises:
Determining the working period corresponding to the first mode and the working period corresponding to the second mode according to the change rate of the bus signal,
The switching time between the first mode and the second mode is a designated time corresponding to an alternating current signal in the power supply signal.
3. The drive control method according to claim 1, characterized in that,
The alternating current signal in the power supply signal is a continuous signal, and comprises positive half-cycle signals and negative half-cycle signals which are alternately distributed,
The duty cycle corresponding to the first mode may comprise an integer number of half-cycle durations, and/or the duty cycle corresponding to the second mode may comprise an integer number of half-cycle durations,
Wherein the half cycle duration includes a duration of the positive half cycle signal and a duration of the negative half cycle signal.
4. The drive control method according to any one of claims 1 to 3, characterized by further comprising:
if the switching device works in the first mode, detecting bus signals in the power supply signals in real time;
Judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value;
and if the bus signal detected in real time is smaller than or equal to the first bus signal threshold value, controlling the switching device to switch to the second mode to work.
5. The drive control method according to any one of claims 1 to 3, characterized by further comprising:
if the switching device works in the first mode, judging whether the bus signal detected in real time is smaller than or equal to a first bus signal threshold value in the power supply signal threshold values;
If the bus signal detected in real time is judged to be larger than the first bus signal threshold value, predicting a bus signal in the next period;
judging whether the bus signal in the next period is smaller than or equal to the first bus signal threshold value;
And if the bus signal in the next period is smaller than or equal to the first bus signal threshold value, controlling the switching device to switch to the second mode to work at the appointed moment.
6. The drive control method according to any one of claims 1 to 3, characterized by further comprising:
if the switching device works in the second mode, detecting bus signals in the power supply signals in real time;
Judging whether the bus signal is greater than or equal to a second bus signal threshold value;
And if the bus signal is larger than or equal to the second bus signal threshold value, controlling the switching device to switch to the first mode to work.
7. The drive control method according to any one of claims 1 to 3, characterized by further comprising:
If the switching device works in the second mode, judging whether the bus signal detected in real time is greater than or equal to a second bus signal threshold value in the power supply signal threshold values;
if the bus signal detected in real time is smaller than the second bus signal threshold value, predicting a bus signal in the next period;
judging the magnitude relation between the bus signal in the next period and a third bus signal threshold value;
and controlling the switching device to switch to the first mode to work at a designated moment according to the magnitude relation between the bus signal in the next period and the third bus signal threshold.
8. The drive control method according to any one of claims 1 to 3, characterized in that,
The drive control circuit further comprises a capacitive element which is connected between the switching device and the load and comprises a plurality of electrolytic capacitors connected in series and/or in parallel, or comprises a plurality of thin film capacitors connected in series and/or in parallel,
The drive control method further includes:
and determining a second bus signal threshold according to the withstand voltage threshold of the capacitive element and the withstand voltage threshold of the switching device.
9. The drive control method according to any one of claims 1 to 3, characterized by further comprising:
detecting the current of the load, and determining the power of the load according to the current calculation of the load;
determining the input power of the load corresponding to the given current in the second mode;
Calculating a difference between the input power and the power of the load, the difference being configured as the charging power;
determining the change rate of the bus signal according to the charging power;
Determining a minimum value for a given current in the second mode based on a rate of change of the bus signal,
Wherein the given current is configured to control the bus signal to rise.
10. A drive control apparatus comprising a processor, wherein the processor when executing a computer program implements:
the step of a drive control method according to any one of claims 1 to 9.
11. An electrical home appliance, comprising:
A load;
The drive control apparatus according to claim 10;
The driving control circuit is controlled by the driving control device, the driving control circuit is provided with a PFC, and the PFC comprises at least one switching device, and the switching device is configured to control a power supply signal to supply power to a load.
12. The home appliance of claim 11, wherein the plurality of home appliances,
The household electrical appliance comprises at least one of an air conditioner, a refrigerator, a fan, a smoke exhaust ventilator, a dust collector and a computer host.
13. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the drive control method according to any one of claims 1 to 9.
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| CN101814825A (en) * | 2010-04-16 | 2010-08-25 | 中兴通讯股份有限公司 | Linear-regulated PFC (Power Factor Correction) control circuit and control method |
| CN102447402A (en) * | 2010-10-13 | 2012-05-09 | 电力集成公司 | Controller with punctuated switching control circuit |
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| CA2751936A1 (en) * | 2010-09-10 | 2012-03-10 | Queen's University At Kingston | Compensation circuit and method for a synchronous rectifier driver |
| US9190898B2 (en) * | 2012-07-06 | 2015-11-17 | Power Systems Technologies, Ltd | Controller for a power converter and method of operating the same |
| CN108528263A (en) * | 2018-06-08 | 2018-09-14 | 重庆聚陆新能源有限公司 | A kind of efficient electric vehicle direct current charge system |
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| CN101814825A (en) * | 2010-04-16 | 2010-08-25 | 中兴通讯股份有限公司 | Linear-regulated PFC (Power Factor Correction) control circuit and control method |
| CN102447402A (en) * | 2010-10-13 | 2012-05-09 | 电力集成公司 | Controller with punctuated switching control circuit |
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