KR20160149973A - Rectifier and method for controlling rectifier - Google Patents

Abstract

According to an aspect of the present invention, there is provided a rectifier including: a rectifier for rectifying an AC power source to a DC power source through a switching operation; A driving unit for applying a switching signal to the rectifying unit; A signal modulator for selecting at least one of a plurality of parameters of the switching signal based on the frequency of the switching signal and adjusting a parameter selected for the switching signal; A high rectification efficiency can be ensured for an AC power supply having a wide input frequency range.

Description

Rectifier and Method for Controlling Rectifier [

The present invention relates to a rectifier and a method of controlling the rectifier.

Generally, a rectifier is a device that rectifies AC power to DC power. For example, the rectifier may output DC power through a plurality of switching elements whose on / off is controlled according to the level of the AC power.

However, when the switching timing of the plurality of switching elements and the phase of the AC power are out of phase, the rectifying efficiency of the rectifier can be reduced. Therefore, a means for improving the rectification efficiency of the rectifier is needed.

Japanese Patent Application Laid-Open No. 10-2005-0118423

One embodiment of the present invention provides a rectifier and a rectifier control method for improving rectification efficiency.

According to an aspect of the present invention, there is provided a rectifier including: a rectifier for rectifying an AC power source to a DC power source through a switching operation; A driving unit for applying a switching signal to the rectifying unit; A signal modulator for selecting at least one of a plurality of parameters of the switching signal based on the frequency of the switching signal and adjusting a parameter selected for the switching signal; . ≪ / RTI >

A method of controlling a rectifier according to an embodiment of the present invention includes: a driving step of applying a switching signal to a rectifier; A sensing step of sensing a current flowing in the rectifier; And an adjustment step of selecting at least one of a plurality of parameters of the switching signal based on the frequency of the switching signal and adjusting a parameter selected for the switching signal; . ≪ / RTI >

The rectifier according to an embodiment of the present invention can ensure high rectification efficiency for an AC power source having a wide input frequency range.

1 is a view illustrating a rectifier according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating the rectifier of FIG. 1 in detail.
3 is a graph for explaining the rectifying efficiency of the rectifying part of FIG.
4 is a graph for explaining reverse current removal according to the operation of the duty ratio adjusting unit of FIG.
5 is a graph for explaining reverse current removal according to the operation of the phase adjusting unit of FIG.
6 is a graph illustrating a gate voltage of a rectifier according to an exemplary embodiment of the present invention.
7 is a flowchart illustrating a method of controlling a rectifier according to an embodiment of the present invention.
8 is a flowchart illustrating a method of controlling a rectifier according to an embodiment of the present invention.
9 is a diagram illustrating an exemplary computing environment in which the method of controlling the rectifiers of FIGS. 7 through 8 may be implemented.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

1 is a view illustrating a rectifier according to an embodiment of the present invention.

Referring to FIG. 1, a rectifier 100 according to an exemplary embodiment of the present invention may include a rectifier 110, a driver 120, and a signal modulator 130.

The rectifying unit 110 can rectify the _AC power supply V _AC to the DC power supply V _RECT through the switching operation. For example, the frequency of the _AC power (V _AC ) may be a low frequency of several hundred kHz band, and may be a high frequency of MHz. That is, the rectifying unit 110 can perform a rectifying operation on an AC power source having a wide input frequency range.

The driving unit 120 may apply a switching signal to the rectifying unit 110. [ For example, the switching signal may be a pulse signal having the same frequency as the frequency of the _AC power source (V _AC ).

The signal modulator 130 can select at least one of the plurality of parameters of the switching signal based on the frequency of the switching signal and adjust the selected parameter for the switching signal. Here, the parameter may include a phase, a duty ratio, an amplitude, or a waveform of the switching signal. According to the selection of the parameter, the adjusting means and effect of the signal modulating unit 130 may be varied.

For example, the signal modulator 130 may control the driver 120 by selecting a control mode based on the frequency of the switching signal. For example, when the frequency of the switching signal is a high frequency, the signal modulator 130 may operate in the first mode. For example, when the frequency of the switching signal is low, the signal modulator 130 may operate in the second mode.

For example, the signal modulator 130 operating in the first mode can control the synchronization of the AC power input to the rectifier 110 with the switching of the rectifier 110. For example, the signal modulator 130 operating in the second mode may control the switching of the rectifier 110 by detecting a reverse current generated in the rectifier 110. Here, the synchronizing operation may cause a relatively higher efficiency than the reverse current sensing operation for the high frequency AC power supply. In addition, the reverse current sensing operation may cause a relatively higher efficiency than the synchronizing operation for the low frequency AC power supply.

Accordingly, the rectifier 100 according to the embodiment of the present invention can perform the rectifying operation with a high efficiency with respect to the AC power source having a wide input frequency range.

FIG. 2 is a diagram illustrating the rectifier of FIG. 1 in detail.

Referring to FIG. 2, the rectifying unit 210 may include first, second, third, and fourth transistors 211, 212, 213, and 214. For example, the first, second, third, and fourth transistors 211, 212, 213, and 214 may be implemented as N-type LD-MOSFETs.

The first and second transistors 211 and 212 may receive the AC power through the drain terminal and the third and fourth transistors 213 and 214 may receive the AC power through the source terminal.

The first, second, third and fourth transistors 211, 212, 213 and 214 are connected to the first, second, third and fourth switching signals V _G1 , V _G2 , V _G3 , and V _G4 ) to the on-off state.

Here, when the values of the second and third switching signals V _G2 and V _G3 are high, the values of the first and fourth switching signals V _G1 and V _G4 are low and the second and third switching signals The values of the first and fourth switching signals V _G1 and V _G4 may be high when the values of V _G2 and V _G3 are low.

The second transistor 212 may be coupled in series with the third transistor 213 and the second transistor 212 may be coupled in series with the fourth transistor 214.

Accordingly, the third and fourth transistors 213 and 214 can output the DC power source V _RECT through the drain terminal.

Referring to FIG. 2, the driver 220 may include first, second, third, and fourth gate drivers 221, 222, 223, and 224.

Said first, second, third and fourth gate drivers (221, 222, 223, 224) each of the first, second, third and fourth switching signal (V _G1, V _G2, V _G3, V _G4 Second, third, and fourth transistors 211, 212, 213, and 214, respectively.

Hereinafter, the rectifying operation of the rectifying unit 210 and the driving unit 220 will be described in detail.

The DC power source (V _RECT ) may not be generated at the beginning of the driving of the rectifying part 210, so that the gate voltage may not be applied. Second, third and fourth transistors 211, 212, 213 and 214 are all off when no gate voltage is applied and the first, second, third and fourth transistors 211, 212, 213, 212, 213, and 214 in the structure of a full-bridge diode by a back-gate diode. When operated by the back gate diode, the drain voltage of the diode is lowered, so that the efficiency of rectification may be low. The gate voltage can be applied after the DC power supply (V _RECT ) has risen above a certain voltage by the full bridge diode.

When the gate voltage is applied, the second and third transistors 212 and 213 can be turned on at the same time when the current of the ac power source is a positive current. When the current of the AC power source is a negative current, the first and fourth transistors 211 and 214 may be turned on at the same time.

Here, the more accurately the turn-on timing is matched to the phase of the AC power, the higher the rectification efficiency of the rectifying part 210 can be. If the turn-on timing and the phase of the AC power source are different from each other, the back gate diode may be visible at the output of the rectifying unit 210 or the charge charged by the capacitance (C _RECT ) of the rectifying unit 210 may be discharged. This may adversely affect the rectifying efficiency of the rectifying part 210.

In order for the turn-on timing to be precisely adjusted to the phase of the AC power supply, the signal modulating section 230 can adjust the switching signal.

2, the rectifier according to an embodiment of the present invention may further include a current sensing unit 240 and the signal modulating unit 230 includes a duty ratio adjusting unit 231 and a phase adjusting unit 232 can do.

The current sensing unit 240 may sense the currents I _SENSE1 and I _SENSE2 flowing in the first, second, third and fourth transistors 211, 212, 213 and 214. For example, the current sensing unit 240 senses the polarity of the current flowing in at least one of the first, second, third, and fourth transistors 211, 212, 213, and 214, It is possible to detect whether or not a reverse current flows in at least one of the third and fourth transistors 211, 212, 213, and 214. The reverse current may adversely affect the rectifying efficiency of the rectifying part 210.

The duty ratio adjusting unit 231 may adjust the duty ratio of at least one of the first, second, third, and fourth switching signals _VG1 , _VG2 , _VG3 , and _VG4 . For example, the duty ratio adjuster 231 can control the duty ratio by advancing the falling time of the value of the third switching signal V _G3 . Accordingly, the ON state duration of the third transistor 213 can be shortened before the third switching signal V _G3 is adjusted. Accordingly, the reverse current generated in the third transistor 213 is removed, so that the rectification efficiency of the rectification part 210 can be enhanced.

The phase adjustment unit 232 may adjust the phase of at least one of the first, second, third, and fourth switching signals V _G1 , V _G2 , V _G3 , and V _G4 . For example, the phase adjuster 232 compares the phase of the AC power source with the phase of the third switching signal V _G3 , and controls the phase of the AC power source and the third switching signal V _G3 to be synchronized The phase of the third switching signal V _G3 can be adjusted. For example, the phase adjuster 232 may perform a synchronization operation using a delay locked loop. Accordingly, the rectifying efficiency of the rectifying part 210 can be increased.

The phase adjusting unit 232 may compensate an internal circuit delay between the sensing timing of the current sensing unit 240 and the blocking timing of the transistors of the gate drivers 221, 222, 223, and 224. Accordingly, the phase adjusting unit 232 may adjust at least one of the first, second, third and fourth switching signals V _G1 , V _G2 , V _G3 and V _G4 together with the duty ratio adjusting unit 231 .

The rectifying efficiency improvement of the rectifying part 210 by the adjustment of the signal modulating part 230 may be changed according to the frequency of the switching signal.

If the frequency of the switching signal is lower than the first reference frequency, the rectifying efficiency of the rectifying part 210 by the duty ratio adjustment may be higher than the rectifying efficiency of the rectifying part 210 by the phase adjusting. Therefore, the signal modulator 230 can reduce the power consumption by operating the duty ratio adjusting unit 231 and the current sensing unit 240 to increase the rectifying efficiency while stopping the phase adjusting unit 232.

If the frequency of the switching signal is higher than the second reference frequency, the rectifying efficiency of the rectifying part 210 by the phase adjustment may be higher than the rectifying efficiency of the rectifying part 210 by the duty ratio adjustment. Therefore, the signal modulator 230 can reduce the power consumption by operating the phase adjusting unit 232 to stop the duty ratio adjusting unit 231 and the current sensing unit 240 while improving rectification efficiency.

If the frequency of the switching signal is higher than the first reference frequency and lower than the second reference frequency, the rectifying efficiency of the rectifying part 210 by the phase adjustment and the rectifying efficiency of the rectifying part 210 by the duty ratio adjustment may be similar. Accordingly, the signal modulating unit 230 can operate both the duty ratio adjusting unit 231 and the phase adjusting unit 232 to greatly increase the rectifying efficiency.

Accordingly, the rectifier according to the embodiment of the present invention can ensure a high rectifying efficiency for an AC power source (V _AC ) having a wide input frequency range.

As a specific example for selecting the adjusting means of the signal modulating unit 230, the signal modulating unit 230 may include first and second switches 233 and 234.

The first and second switches 233 and 234 may perform a branching operation based on the frequency of the switching signal between the current sensing unit 240, the duty ratio adjusting unit 231, and the phase adjusting unit 232. That is, the adjusting unit of the signal modulating unit 230 may be implemented by the first and second switches 233 and 234 selected by the current detecting unit 240.

For example, the second switch 234 is disposed between the current sensing unit 240 and the phase adjusting unit 232, and is turned off when the frequency of the switching signal is lower than the first reference frequency. And can be turned on when the frequency is higher than the first reference frequency.

For example, the first switch 233 is disposed between the current sensing unit 240 and the duty ratio adjusting unit 231, and is turned on when the frequency of the switching signal is lower than the second reference frequency. Can be turned off when the frequency of the second reference frequency is higher than the second reference frequency.

Here, the second reference frequency may be higher than the first reference frequency. Therefore, when the frequency of the switching signal is higher than the first reference frequency and lower than the second reference frequency, the first and second switches 233 and 234 can be all turned on.

The adjusting unit of the signal modulating unit 230 may be a duty ratio adjusting unit 231 or a phase adjusting unit 232 as well as the current sensing unit 240.

For example, the phase adjusting unit 232 may receive the AC power (V _AC ) to determine the frequency of the switching signal, and may also select the adjusting unit to determine whether the duty ratio adjusting unit 231 and the current sensing unit 240 operate You can decide.

3 is a graph for explaining the rectifying efficiency of the rectifying part of FIG.

3, the abscissa represents time, the ordinate axis represents the AC power source (V _AC ), the ordinate axis represents the DC power source (V _RECT ), and the ordinate axis represents the second and third It denotes a switching signal _{(V G2, V G3),} (d) and the vertical axis of the graph is the first and the fourth switching signal (V _G1, V _G4).

When the values of the second and third switching signals V _G2 and V _G3 are high even though the _AC power supply V _AC is at a negative level since the second and third switching signals V _G2 and V _G3 are not optimized, It can be confirmed that the DC power source (V _RECT ) is discharged, which causes the efficiency reduction.

Here, when the first and fourth switching signals V _G1 and V _G4 are first turned-on or turned-off with respect to the _AC power source V _AC , The charged charge may be discharged by an AC power source or may be discharged through a back-gate diode to reduce rectification efficiency.

The rectifier according to the embodiment of the present invention can reduce the reduction in the rectification efficiency.

4 is a graph for explaining reverse current removal according to the operation of the duty ratio adjusting unit of FIG.

4 (a) shows the AC power source (V _AC ), and FIG. 4 (b) shows the second and third switching signals V _G2 and V _G3 before the duty ratio adjusting section operates, _4C shows the second and third switching signals V _G2 and V _G3 and the current I _SENSE2 of the second and third transistors when the duty ratio adjusting section operates. .

4A and 4B, even when the polarity of the _AC power source V _AC is changed from positive to negative, a period in which the values of the second and third switching signals V _G2 and V _G3 are high exists . The polarity of the current (I _SENSE2 ) of the second and third transistors in the section may also be changed from positive to negative. That is, reverse current may be generated in the second and third transistors.

4 (a) and 4 (c), the values of the second and third switching signals V _G2 and V _{G3 change} from high to low when the polarity of the _AC power source V _AC changes from positive to negative The voltage drop timing of the second and third switching signals V _G2 and V _G3 can be controlled. That is, by operating the duty ratio adjusting section, reverse current generation in the second and third transistors can be prevented. Accordingly, the rectifying efficiency of the rectifier according to the embodiment of the present invention can be increased.

5 is a graph for explaining reverse current removal according to the operation of the phase adjusting unit of FIG.

5 (a) shows the AC power source V _AC , FIG. 5 (b) shows the currents of the second and third switching signals V _G2 and V _G3 before the phase adjusting section operates, FIG. _4C shows the second and third switching signals V _G2 and V _G3 and the current I _SENSE2 of the second and third transistors when the phase adjusting section _operates .

5A and 5B, even when the polarity of the _AC power source V _AC is changed from positive to negative, there is a period in which the values of the second and third switching signals V _G2 and V _G3 are high . The polarity of the current (I _SENSE2 ) of the second and third transistors in the section may also be changed from positive to negative. That is, reverse current may be generated in the second and third transistors.

5A and 5C, when the polarity of the _AC power source V _AC changes from positive to negative, the values of the second and third switching signals V _G2 and V _{G3 change} from high to low The phases of the second and third switching signals V _G2 and V _G3 can be adjusted. That is, by operating the phase adjusting section, reverse current generation in the second and third transistors can be prevented. Accordingly, the rectifying efficiency of the rectifier according to the embodiment of the present invention can be increased.

6 is a graph illustrating a gate voltage of a rectifier according to an exemplary embodiment of the present invention.

6, the horizontal axis represents time, the vertical axis of the graph represents the AC power source (V _AC ), the vertical axis of the graph represents the second switching signal (V _G2 ) before adjustment of the signal modulation unit, (c) The vertical axis of the graph represents the third switching signal (V _G3 ) after adjustment of the signal modulation unit.

The rectifier according to the embodiment of the present invention can adjust the switching timing of at least one transistor included in the rectifier to the AC power source (V _AC ) by using the signal modulator. Thus, a high rectifying efficiency can be secured for an AC power source having a wide input frequency range.

Hereinafter, a method of controlling a rectifier according to an embodiment of the present invention will be described. Since the control method of the rectifier can be performed in the rectifier described above with reference to FIGS. 1 to 6, the same or corresponding contents to those described above will not be described in duplicate.

7 is a flowchart illustrating a method of controlling a rectifier according to an embodiment of the present invention.

Referring to FIG. 7, the rectifier applies a switching signal to the rectifying part in step S10, controls the current flowing in the rectifying part in step S20, and adjusts the switching signal by selecting a parameter of the switching signal S30).

For example, the control method of the rectifier may be performed by itself through an internal control circuit of the rectifier, or may be performed by an external control circuit.

The method of controlling a rectifier according to an embodiment of the present invention may be applied to a wireless power transmission (WPT) or a wireless communication module (A4WP and WPC, PMA) for performing a rectifying operation.

According to the method of controlling a rectifier according to an embodiment of the present invention, a rectifier and a module including the rectifier can ensure high rectification efficiency for an AC power source having a wide input frequency range.

8 is a flowchart illustrating a method of controlling a rectifier according to an embodiment of the present invention.

Referring to FIG. 8, the rectifier applies a switching signal to the rectifying part (S10), senses the current flowing through the rectifying part (S20), compares the frequency of the switching signal with the reference frequency (S31) (S32). When the frequency of the switching signal is lower than the reference frequency, the duty ratio of the switching signal is adjusted (S33), and the current of the rectifier (S34), and an additional parameter of the switching signal can be adjusted (S35) when the current of the rectifier is smaller than the reference current.

A specific computing method for the control method of the rectifier shown in Figs. 7 and 8 will be described later with reference to Fig. For example, the input device can receive the output of the current sensing unit, the memory can store the reference frequency and the reference current, etc., and the processing unit compares the input value of the input device with the value stored in the memory, And the output device can output a signal for controlling the driving unit.

FIG. 9 is a diagram illustrating an exemplary computing environment in which one or more embodiments disclosed herein may be implemented, and is illustrative of a system 1000 including a computing device 1100 configured to implement one or more of the embodiments described above. / RTI > For example, the computing device 1100 may be a personal computer, a server computer, a handheld or laptop device, a mobile device (mobile phone, PDA, media player, etc.), a multiprocessor system, a consumer electronics device, A distributed computing environment including any of the above-described systems or devices, and the like.

The computing device 1100 may include at least one processing unit 1110 and memory 1120. [ The processing unit 1110 may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor, an application specific integrated circuit (ASIC), a field programmable gate array And may have a plurality of cores. The memory 1120 can be a volatile memory (e.g., RAM, etc.), a non-volatile memory (e.g., ROM, flash memory, etc.) or a combination thereof.

In addition, the computing device 1100 may include additional storage 1130. Storage 1130 includes, but is not limited to, magnetic storage, optical storage, and the like. The storage 1130 may store computer readable instructions for implementing one or more embodiments as disclosed herein, and other computer readable instructions for implementing an operating system, application programs, and the like. The computer readable instructions stored in storage 1130 may be loaded into memory 1120 for execution by processing unit 1110.

In addition, computing device 1100 may include input device (s) 1140 and output device (s) Here, input device (s) 1140 may include, for example, a keyboard, a mouse, a pen, a voice input device, a touch input device, an infrared camera, a video input device or any other input device. Also, output device (s) 1150 can include, for example, one or more displays, speakers, printers, or any other output device. In addition, computing device 1100 may use an input device or output device included in another computing device as input device (s) 1140 or output device (s) 1150. [

In addition, computing device 1100 may include communication connection (s) 1160 that enable communication with other devices (e.g., computing device 1300) via network 1200. [ (S) 1160 may include a modem, a network interface card (NIC), an integrated network interface, a radio frequency transmitter / receiver, an infrared port, a USB connection or other Interface. Also, the communication connection (s) 1160 may include a wired connection or a wireless connection.

Each component of the computing device 1100 described above may be connected by various interconnects (e.g., peripheral component interconnect (PCI), USB, firmware (IEEE 1394), optical bus architecture, etc.) And may be interconnected by a network.

As used herein, terms such as "component," "module," "system," "interface," and the like generally refer to a computer-related entity that is hardware, a combination of hardware and software, software, or software in execution. For example, an element may be, but is not limited to being, a processor, an object, an executable, an executable thread, a program and / or a computer running on a processor. For example, both the application running on the controller and the controller may be components. One or more components may reside within a process and / or thread of execution, and the components may be localized on one computer and distributed among two or more computers.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

110: rectification part
111: first transistor
112: second transistor
113: third transistor
114: fourth transistor
120:
130: Signal modulation section
131: duty ratio adjustment section
132:
133: first switch
134: second switch
140:

Claims (13)

A rectifying unit for rectifying the AC power to the DC power through the switching operation;
A driving unit for applying a switching signal to the rectifying unit; And
A signal modulator for selecting at least one of a plurality of parameters of the switching signal based on the frequency of the switching signal and adjusting a parameter selected for the switching signal; / RTI >
The method according to claim 1,
Wherein the signal modulator controls the phase of the switching signal when the frequency of the switching signal is higher than the reference frequency and controls the duty ratio of the switching signal when the frequency of the switching signal is lower than the reference frequency.
3. The method of claim 2,
Wherein the signal modulator controls the phase and duty ratio of the switching signal when the frequency of the switching signal is higher than the reference frequency and lower than the second reference frequency.
The method according to claim 1,
And a current sensing unit for sensing a current flowing in the rectifying unit,
Wherein the signal modulator adjusts at least one of a phase and a duty ratio of the switching signal based on a current flowing in the rectifying part.
The apparatus of claim 4, wherein the signal modulator comprises:
A phase adjusting unit for adjusting a phase of the switching signal;
A duty ratio adjusting unit for adjusting a duty ratio of the switching signal based on the detection result of the current sensing unit; And
A switch for performing a branching operation based on the frequency of the switching signal between the current sensing unit, the phase adjusting unit, and the duty ratio adjusting unit; / RTI >
6. The method of claim 5,
Wherein the phase adjusting unit compares the phase of the AC power source with the phase of the switching signal and adjusts the phase of the switching signal so that the AC power source and the switching signal are synchronized with each other based on a result of the comparison.
The apparatus according to claim 1,
First and second transistors receiving the AC power through a drain terminal and receiving the switching signal through a gate terminal; And
Third and fourth transistors receiving the AC power through a source terminal and receiving the switching signal through a gate terminal; Lt; / RTI >
The first transistor is connected in series with the third transistor,
And the second transistor is connected in series with the fourth transistor.
8. The method of claim 7,
And a current sensing unit for sensing a reverse current flowing in the first and second transistors,
And the signal modulator controls a falling point of a switching signal applied to the first and second transistors based on the reverse current.
A driving step of applying a switching signal to the rectifier; And
An adjustment step of selecting at least one of a plurality of parameters of the switching signal based on the frequency of the switching signal and adjusting a parameter selected for the switching signal; And a control unit for controlling the rectifier.
10. The method of claim 9,
The adjusting step adjusts the phase of the switching signal when the frequency of the switching signal is higher than the reference frequency and adjusts the duty ratio of the switching signal when the frequency of the current flowing in the rectifier is lower than the second reference frequency A method of controlling a rectifier.
10. The method of claim 9,
And a sensing step of sensing a current flowing in the rectifier,
Wherein the adjusting step determines the number of the adjustment parameters to be selected based on an average value of the currents flowing through the rectifier.
10. The method of claim 9,
Wherein the adjusting step adjusts the phase of the switching signal so that the current flowing in the rectifier is synchronized with the current flowing in the rectifier based on the result of the comparison, Of the rectifier.
10. The method of claim 9,
The sensing step senses a reverse current flowing in the rectifier,
Wherein the adjusting step controls the falling time of the switching signal based on the reverse current.

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