WO2011114850A1 - スイッチング電源装置 - Google Patents
スイッチング電源装置 Download PDFInfo
- Publication number
- WO2011114850A1 WO2011114850A1 PCT/JP2011/054087 JP2011054087W WO2011114850A1 WO 2011114850 A1 WO2011114850 A1 WO 2011114850A1 JP 2011054087 W JP2011054087 W JP 2011054087W WO 2011114850 A1 WO2011114850 A1 WO 2011114850A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switching element
- output voltage
- voltage
- circuit
- secondary winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/01—Resonant DC/DC converters
-
- 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
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33571—Half-bridge at primary side of an isolation transformer
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
-
- 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
Definitions
- the present invention relates to a switching power supply device having a plurality of outputs, and more particularly to a switching power supply device that can control two outputs simultaneously with high accuracy.
- Patent Literatures 1 and 2 are disclosed as switching power supply devices having a plurality of outputs.
- Patent Document 1 includes two transformer secondary windings, each of which is provided with a rectifying and smoothing circuit, and is configured to detect the output voltage of one of the secondary windings and perform feedback control. A circuit is shown.
- Patent Document 2 discloses a switching power supply circuit having a current resonance converter configuration.
- the switching power supply circuit described in Patent Document 2 is shown in FIG.
- This switching power supply circuit is a current resonance type switching regulator having switching elements S1 and S2 and a control circuit 2 for controlling converter transformer 3 and switching elements S1 and S2.
- the converter transformer 3 includes a primary winding NP to which an input voltage is applied as the switching elements S1 and S2 are turned on / off, a control voltage secondary winding NS2 for supplying the operating voltage VCC to the control circuit 2, and a direct current.
- a secondary winding NS1 for output voltage for extracting the output V0 is provided, and a full-wave rectifier circuit is configured on each secondary side.
- the control circuit 2 drives the switching elements S1 and S2 in a complementary manner with a duty of 50%, and controls the output voltage Vo by frequency control.
- control is performed so that the voltage of one rectified and smoothed output (control output side) of the two secondary windings of the transformer is stabilized.
- the output voltage is not determined only by the turns ratio of the transformer windings.
- the output voltage changes due to characteristic changes and variations of the elements. That is, there is a problem that the accuracy of voltage stabilization on the non-control output side is low.
- An object of the present invention is to provide a switching power supply device that can control two outputs simultaneously and accurately.
- the switching power supply device is configured as follows. (1) a series circuit including a first switching element (Q1) and a second switching element (Q2) connected to a power supply input unit to which a DC input voltage is input; A transformer (T1) in which at least the primary winding (L1) and the secondary winding are magnetically coupled; The first switching element (Q1) or the second switching element (Q2) is connected in parallel, and the primary winding (L1), inductor (Lr), and capacitor (Cr) of the transformer (T1) are connected in series.
- a series resonant circuit A first rectifying / smoothing circuit (D1, D1) for extracting a first output voltage (Vo1) by rectifying and smoothing a voltage generated in the secondary winding of the transformer (T1) during an ON period of the first switching element (Q1).
- Co1 A second rectifying / smoothing circuit (D2, D2) that rectifies and smoothes the voltage generated in the secondary winding of the transformer (T1) during the ON period of the second switching element (Q2) to extract the second output voltage (Vo2).
- the first switching element (Q1) and the second switching element (Q2) are driven so as to repeat complementary ON / OFF, and based on the first output voltage and the second output voltage, Switching for controlling the on-time of the first switching element (Q1) and the on-time of the second switching element (Q2) to control the first output voltage (Vo1) and the second output voltage (Vo2). And a control circuit (10).
- a first series circuit connected to a power supply input section to which a DC input voltage is input, wherein the first switching element (Q1) is on the high side and the second switching element (Q2) is on the low side;
- a second series circuit connected to a power supply input section to which a DC input voltage is input, wherein the third switching element (Q3) is on the high side and the fourth switching element (Q4) is on the low side;
- a transformer (T1) in which at least a primary winding and a secondary winding are magnetically coupled; One end is connected to a connection point between the first switching element (Q1) and the second switching element (Q2), and another point is connected to the connection point between the third switching element (Q3) and the fourth switching element (Q4).
- a series resonant circuit including a primary winding (L1) of the transformer (T1), an inductor (Lr), and a capacitor (Cr), the ends of which are connected;
- the first output voltage is extracted by rectifying and smoothing the voltage generated in the secondary winding of the transformer (T1) during the ON period of the first switching element (Q1) and the fourth switching element (Q4).
- a second output voltage is extracted by rectifying and smoothing the voltage generated in the secondary winding of the transformer (T1) during the ON period of the second switching element (Q2) and the third switching element (Q3).
- a rectifying / smoothing circuit D2, Co2;
- the first switching element (Q1) and the fourth switching element (Q4), and the second switching element (Q2) and the third switching element (Q3) are driven so as to repeat complementary ON / OFF.
- On-time of the first switching element and the fourth switching element and on-time of the second switching element and the third switching element are controlled based on the first output voltage and the second output voltage, respectively.
- a first output voltage detection circuit that detects the first output voltage (Vo1)
- a second output voltage detection circuit that detects the second output voltage (Vo2)
- the first output voltage is Vo1
- the second output voltage is Vo2
- the on-time of the first switching element (Q1) is Ton1
- the on-time of the second switching element (Q2) is Ton2
- the switching control circuit If the voltage is Vref1 and the second reference voltage is Vref2, the switching control circuit
- the first output voltage Vo1 and the second output voltage Vo2 are respectively predetermined.
- the on-time Ton1 of the first switching element (Q1) and the on-time Ton2 of the second switching element (Q2) are subjected to multivariable feedback control so that the voltage becomes equal.
- the transfer functions A and D are each set to zero. That is, the second output voltage Vo2 is controlled by the on time (Ton1) of the first switching element (Q1), and the first output voltage Vo1 is controlled by the on time (Ton2) of the second switching element (Q1).
- the secondary winding may be composed of a single winding (L2) that generates the first output voltage and the second output voltage.
- the secondary winding includes a first secondary winding (L21) that generates the first output voltage and a second secondary winding (L22) that generates the second output voltage. It may be configured.
- the first secondary winding (L21) and the second secondary winding (L22) are wound independently of each other, and the first rectifying and smoothing circuit and the second secondary winding (L22) are wound independently of each other.
- the ground sides of the rectifying / smoothing circuit are connected to each other.
- the first secondary winding (L21) and the second secondary winding (L22) are wound independently of each other, and the ground side of the first rectifying and smoothing circuit is The voltage output side of the second rectifying / smoothing circuit is connected, or the ground side of the second rectifying / smoothing circuit and the voltage output side of the first rectifying / smoothing circuit are connected. With this configuration, it is possible to maintain a good balance between the two outputs.
- the switching control circuit is configured by, for example, a DSP (Digital Signal Processor).
- DSP Digital Signal Processor
- the accuracy of the output voltage can be kept high with respect to the light weight fluctuation of the load connected to the two outputs.
- the second output voltage Vo2 is controlled by the on time (Ton1) of the first switching element (Q1), and the first output voltage Vo1 is controlled by the on time (Ton2) of the second switching element (Q1).
- the control circuit can be configured simply.
- FIG. 1 is a circuit diagram of a switching power supply circuit described in Patent Document 2.
- FIG. FIG. 2 is a circuit diagram of the switching power supply apparatus 101 according to the first embodiment.
- FIG. 3A is an equivalent circuit diagram of the entire switching power supply device 101 shown in FIG.
- FIG. 3B is an equivalent circuit diagram when the first switching element Q1 is in an on state
- FIG. 3C is an equivalent circuit diagram when the second switching element Q2 is in an on state.
- FIG. 4 is a diagram illustrating a method of generating drive pulses for the first switching element Q1 and the second switching element Q2.
- FIG. 5 is a circuit diagram of the switching power supply apparatus 102 according to the second embodiment.
- FIG. 6 is a circuit diagram of the switching power supply apparatus 103 according to the third embodiment.
- FIG. 7 is an example of a specific circuit diagram of the control circuits 11 and 12 shown in FIG.
- FIG. 8 is a waveform diagram of signals at various parts of the circuit shown in FIG. 9A and 9B are circuit diagrams of the switching power supply devices 104A and 104B according to the fourth embodiment.
- FIG. 10 is a circuit diagram of the secondary side of the switching power supply device according to the fifth embodiment.
- FIG. 11 is a circuit diagram of the secondary side of the switching power supply device according to the fifth embodiment.
- FIG. 12 is a circuit diagram of the secondary side of the switching power supply device according to the fifth embodiment.
- FIG. 13 is a circuit diagram of the secondary side of the switching power supply circuit according to the fifth embodiment.
- FIG. 14 is a circuit diagram of the primary side of the switching power supply device according to the sixth embodiment.
- FIG. 2 is a circuit diagram of the switching power supply apparatus 101 according to the first embodiment.
- the switching power supply device 101 includes a transformer T1 in which at least a primary winding L1, a first secondary winding L21, and a second secondary winding L22 are magnetically coupled.
- a first switching element Q1 and a second switching element Q2 are connected in series to power input terminals Pi (+) and Pi (G), which are power input units to which a DC input voltage Vi is input.
- a resonance capacitor Cr and an inductor Lr that are connected in series to form a series resonance circuit together with the primary winding L1.
- the inductor Lr may not be provided as a component but may be configured in combination with the transformer T1.
- the first secondary winding L21 of the transformer T1 is provided with a first rectifying and smoothing circuit including a diode D1 and a capacitor Co1.
- the first rectifying / smoothing circuit rectifies and smoothes the voltage generated in the first secondary winding L21 of the transformer T1 during the on-period of the first switching element Q1, and extracts the first output voltage Vo1.
- the second secondary winding L22 of the transformer T1 is provided with a second rectifying and smoothing circuit including a diode D2 and a capacitor Co2.
- the second rectifying / smoothing circuit rectifies and smoothes the voltage generated in the second secondary winding L22 of the transformer T1 during the ON period of the second switching element Q2, and extracts the second output voltage Vo2.
- the first secondary winding L21 and the second secondary winding L22 are wound independently of each other, but the ground sides of the first rectifying / smoothing circuit and the second rectifying / smoothing circuit are connected to each other. .
- the first output voltage Vo1 is output to the first power supply output terminals Po1 (+) and Po1 (G) and applied to the load RL1.
- the second output voltage Vo2 is output to the second power supply output terminals Po2 (+) and Po2 (G) and applied to the load RL2.
- the first switching element Q1 and the second switching element Q2 are MOS-FETs, and a switching control circuit (hereinafter simply referred to as “control circuit”) 10 is connected to their gates.
- the control circuit 10 drives the first switching element Q1 and the second switching element Q2 so as to repeat ON / OFF in a complementary manner with respect to each other while the both are in the OFF state.
- the control circuit 10 controls the on-time of the first switching element Q1 and the on-time of the second switching element Q2, respectively, based on the first output voltage Vo1 and the second output voltage Vo2. That is, unlike the conventional current resonance converter, the on-duty ratio changes. As a result, the first output voltage Vo1 and the second output voltage Vo2 are each stabilized at a predetermined voltage.
- FIG. 3A is an equivalent circuit diagram of the entire switching power supply apparatus 101 shown in FIG.
- FIG. 3B is an equivalent circuit diagram when the first switching element Q1 is in an on state
- FIG. 3C is an equivalent circuit diagram when the second switching element Q2 is in an on state.
- the inductor M is an inductor that equivalently represents the mutual inductance by the primary winding L1 and the secondary windings L21 and L22 of the transformer T1.
- Capacitors Co1 'and Co2' correspond to the capacitors Co1 and Co2 shown in FIG.
- the loads RL1 'and RL2' correspond to the loads RL1 and RL2 shown in FIG.
- the currents ico1 'and ico2' correspond to the currents flowing through the capacitors Co1 and Co2 shown in FIG.
- the values of the capacitors Co1 ′ and Co2 ′, the loads RL1 ′ and RL2 ′, and the currents ico1 ′ and ico2 ′ are the windings of the primary and secondary windings of the transformer T1, as represented by the following equation: It is a value according to the line ratio.
- Co1 ′ and Co2 ′ are capacitance values of capacitors Co1 ′ and Co2 ′
- RL1 ′ and RL2 ′ are resistance values of loads RL1 ′ and RL2 ′
- ico1 ′ and ico2 ′ are current values of currents ico1 ′ and ico2 ′. It is.
- N1 represents the number of turns of the primary winding L1 of the transformer T1
- N21 represents the number of turns of the first secondary winding L21
- N22 represents the number of turns of the second secondary winding L22.
- n1 N1 / N21
- n2 N1 / N22 It is.
- the input voltage Vi is applied to the resonance circuit, and a current flows so as to charge Cr as shown in FIG. Further, when the second switching element Q2 is turned on, a current flows as shown in FIG. 3C so as to discharge the charge accumulated in Cr.
- the voltage across the inductor Lr is Vlr
- the voltage applied to the load RL1 ′ is Vo1 ′
- the voltage across the capacitor Cr is Vcr
- the current flowing through the diode D1 is id1
- the voltage across the inductor M is Vm
- the inductor M If the flowing current is represented by im, The following formula is established during the ON period of the first switching element Q1.
- This control system is a multivariable feedback control system in which two control amounts and two manipulated variables have mutual interference, and can be controlled by a controller having a transfer function matrix as follows.
- L [] Laplace conversion
- Ton1 is the on-time of the first switching element Q1
- Ton2 is the on-time of the second switching element Q2.
- A, B, C, and D are coefficients determined by the circuit and the operating state.
- Vref1 and Vref2 are reference voltages.
- Equation (5) When PI control is performed based on Ton1 based on Vo2 and Ton2 based on Vo1, the coefficients A, B, C, and D shown in Equation (5) are as follows.
- K IB / s and K IC / s are integrals, and K PB and K PC are proportional.
- the controller 10 is configured by a DSP (Digital Signal Processor) as to how the drive pulses of the first switching device Q1 and the second switching device Q2 are generated with given Ton1 and Ton2.
- DSP Digital Signal Processor
- CNTR is a counter and increases with each clock.
- PRD is a period and goes to zero when CNTR reaches this value. That is, the switching period is determined.
- CMP is a compare. When CNTR and CMP match, the pulse is inverted.
- Q1G is a Q1 drive pulse, and is set to rise when CNTR matches zero and to fall when CNTR matches CMP.
- Q2G is a Q2 drive pulse, and is set to rise when CNTR matches CMP and fall when CNTR matches PRD. Drive pulses Q1 and Q2 are generated so that PRD corresponds to Ton1 + Ton2 and CMP corresponds to Ton1.
- the control circuit 10 shown in FIG. 2 includes a first output voltage detection circuit that detects the first output voltage Vo1 and a second output voltage detection circuit that detects the second output voltage Vo2.
- the control circuit 10 in FIG. 2 determines that the first output voltage Vo1 and the second output voltage Vo2 are predetermined values based on the detection signal of the first output voltage detection circuit and the detection signal of the second output voltage detection circuit, respectively.
- the on-time Ton1 of the first switching element Q1 and the on-time Ton2 of the second switching element Q2 are feedback-controlled so that
- the capacitor Cr is charged during the ON period of the first switching element Q1, and the energy stored in the capacitor Cr is supplied to the load during the ON period of the second switching element Q2.
- the second output voltage Vo2 can be controlled by the on-time of the first switching element Q1.
- the first output voltage Vo1 can be controlled by the on-time of the second switching element Q2.
- FIG. 5 is a circuit diagram of the switching power supply apparatus 102 according to the second embodiment.
- the first embodiment differs from the circuit shown in FIG. 2 in the configuration of the primary side of the transformer T1.
- the first switching element Q1 is provided on the low side
- the second switching element Q2 is provided on the high side.
- the circuit operation is the same as that of the switching power supply apparatus 101 shown in FIG.
- FIG. 6 is a circuit diagram of the switching power supply apparatus 103 according to the third embodiment.
- the configuration of the control circuits 11 and 12 is different from the circuit shown in FIG.
- the operation of the converter is the same as that of the switching power supply device 101 shown in FIG.
- control circuit 11 that detects the second output voltage Vo2 to control the on-time of the first switching element Q1, and the on-time of the second switching element Q2 by detecting the first output voltage Vo1. Is independently provided.
- FIG. 7 is an example of a specific circuit diagram of the control circuits 11 and 12 shown in FIG.
- the configurations of the control circuit 11 and the control circuit 12 are the same.
- the control circuit 11 will be described.
- a resistance voltage dividing circuit using resistors R11 and R12 is connected between the second power output terminals Po2 (+) and Po2 (G).
- the error amplifier EA1, the resistors R13 and R14, the capacitor C11, and the reference voltage generation circuit Vref2 constitute an error amplification circuit.
- the output voltage of the resistor voltage divider circuit is input to the error amplifier circuit via the resistor R13.
- a light emitting element of the photocoupler PC1 is connected to the output of the error amplifier circuit via a resistor R15.
- a light receiving circuit is configured by connecting a resistor R16 to the light receiving element of the photocoupler PC1.
- a feedback voltage Vfb1 is output from this light receiving circuit.
- the feedback voltage Vfb1 is input to the negative input terminal of the comparator CP1, and the output signal of the ramp waveform generating circuit GR1 is input to the positive input terminal.
- the ramp waveform generation circuit GR1 generates a ramp waveform triggered by the set output signal of the flip-flop FF1.
- the transformer T1 is provided with an auxiliary winding Lb1, and a zero current detection circuit ZD1 is connected via a resistor Rb1.
- the zero current detection circuit ZD1 detects the inversion timing of the transformer voltage based on the voltage Vsb1 of the auxiliary winding Lb1 of the transformer T1.
- the flip-flop FF1 is set by the output of the zero current detection circuit ZD1, and is reset by the output of the comparator CP1.
- the Q output of the flip-flop FF1 is given as the gate signal of the first switching element Q1.
- the configuration of the control circuit 12 is the same as that of the control circuit 11.
- FIG. 8 is a waveform diagram of signals at various parts of the circuit shown in FIG.
- the turn-off of the second switching element Q2 is detected by the decrease of the auxiliary winding voltage Vsb1, and the flip-flop FF1 is set.
- the first switching element Q1 is turned on by the Q output signal Q 1G of the flip-flop FF1.
- the increase in Vramp1 begins.
- Vramp1 reaches Vfb1 at timing t2
- the flip-flop FF1 is reset and the first switching element Q1 is turned off.
- a resonance voltage appears in the auxiliary winding Lb2 due to parasitic components such as a switching element, and the auxiliary winding voltage Vsb2 decreases.
- the flip-flop FF2 When turn-off of the first switching element Q1 is detected by the auxiliary winding voltage Vsb2 at timing t3, the flip-flop FF2 is set. The second switching element Q2 is turned on by the Q output signal Q 2G flip-flop FF2. When Vramp2 reaches Vfb2 at timing t4, the flip-flop FF2 is reset and the second switching element Q2 is turned off. Thereby, a resonance voltage appears in the auxiliary winding Lb1 due to the parasitic component, and the auxiliary winding voltage Vsb1 decreases. The above operation is repeated.
- the light receiving circuits in the control circuits 10 and 11 are shown as analog circuits, but the main parts of the control circuits 10 and 11 may be configured by a DSP (Digital Signal Processor).
- the ramp waveform generating circuits GR1 and GR2 are constituted by counters
- the comparators CP1 and CP2 are constituted by digital comparators
- the flip-flops FF1 and FF2 are constituted by digital output ports.
- 9A and 9B are circuit diagrams of the switching power supply devices 104A and 104B according to the fourth embodiment.
- a difference from the circuit shown in FIG. 2 in the first embodiment is the configuration of the secondary side of the transformer T1.
- the operation of the converter is the same as that of the switching power supply device 101 shown in FIG.
- the first secondary winding L21 and the second secondary winding L22 are wound independently of each other, and the first rectifying and smoothing circuit is grounded. And the voltage output side of the second rectifying and smoothing circuit are connected.
- This configuration makes it possible to adjust the power sharing between the first secondary winding L21 and the second secondary winding L22.
- Vo1 12 [V], 100 [W] (8.3 A)
- the first secondary winding L21 is 7 [ V]
- 58.1 [W] (7 ⁇ 8.3 58.1)
- the first secondary winding L21 is 12 [V], 100 [W] (8.3 A)
- the second secondary winding. L22 becomes unbalanced power sharing such as 5 [V], 30 [W] (6A).
- the ground side of the second rectifying / smoothing circuit and the voltage output side of the first rectifying / smoothing circuit are connected.
- the polarity of the secondary winding with respect to the primary winding of the transformer T1 can also be regarded as reversed from that shown in FIG.
- the effect of the switching power supply device 104B is the same as that of the switching power supply device 104A.
- ⁇ Fifth Embodiment In each of the embodiments described above, a transformer having two secondary windings is used. In the fifth embodiment, two output voltages are obtained by using a single secondary winding.
- Is. 10 to 13 are circuit diagrams on the secondary side of the four switching power supply circuits according to the fifth embodiment. The configuration on the primary side may be any circuit already shown in each embodiment.
- a voltage doubler type rectifier circuit is configured by diodes D1 and D2 and capacitors Co1 and Co2 in the secondary winding L2 of the transformer.
- the capacitor Co1 is charged through a path indicated by a solid arrow in the figure.
- the capacitor Co2 is charged through a path indicated by a dashed arrow in the figure.
- An added voltage of the charging voltages of the capacitors Co1 and Co2 is output to the first power output terminal Po1 (+).
- the charging voltage of the capacitor Co2 is output to the second power output terminal Po2 (+).
- a voltage doubler rectifier circuit is configured with diodes D1 and D2 and capacitors Co1 and Co2 in the secondary winding L2 of the transformer.
- a winding is added to the secondary winding L2, and a diode D2 is connected to the added winding. Therefore, the charging voltage of the capacitor Co2 can be increased compared to the charging voltage of the capacitor Co1.
- the ratio of the first output voltage Vo1 and the second output voltage Vo2 can be greatly shifted from 2: 1.
- a rectifying / smoothing circuit using diodes D11 and D12 and a capacitor Co1 and a rectifying / smoothing circuit using diodes D21 and D22 and a capacitor Co2 are connected to the secondary winding L2.
- the capacitor Co1 is charged through a path indicated by a solid arrow in the figure.
- the capacitor Co2 is charged through a path indicated by a dashed arrow in the drawing.
- a rectifying / smoothing circuit using diodes D11, D12 and a capacitor Co1 and a rectifying / smoothing circuit using diodes D21, D22 and a capacitor Co2 are connected to the secondary winding L2.
- a tap is drawn out to the secondary winding L2, and a diode D22 is connected to the drawn-out winding. Therefore, the charging voltage of the capacitor Co2 can be made lower than the charging voltage of the capacitor Co1.
- the ratio of the first output voltage Vo1 and the second output voltage Vo2 can be greatly shifted from 1: 1.
- a tap is drawn out to the secondary winding L2 to reduce the voltage is shown here, it is also possible to increase the voltage by adding a winding.
- FIG. 14 is a circuit diagram of the primary side of the switching power supply device according to the sixth embodiment.
- the configuration on the secondary side may be any circuit already shown in each embodiment.
- High-side driver circuits HD1 and HD2 are connected to the high-side switching elements Q1 and Q3, respectively.
- Control circuit 10 simultaneously turns on / off switching elements Q1, Q4 and turns off / on switching elements Q2, Q3 simultaneously. In this way, a bridge circuit may be configured on the primary side.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
特許文献1には、トランスの二次巻線を二つ備え、それぞれに整流平滑回路が設けられ、一方の二次巻線の出力電圧を検出して、フィードバック制御をするように構成された電源回路が示されている。
(1)直流の入力電圧が入力される電源入力部に接続された、第1スイッチング素子(Q1)及び第2スイッチング素子(Q2)による直列回路と、
少なくとも一次巻線(L1)と二次巻線が磁気的に結合されたトランス(T1)と、
前記第1スイッチング素子(Q1)又は前記第2スイッチング素子(Q2)に並列に接続され、前記トランス(T1)の一次巻線(L1)とインダクタ(Lr)とキャパシタ(Cr)とが直列に接続された直列共振回路と、
前記第1スイッチング素子(Q1)のオン期間に前記トランス(T1)の二次巻線に発生する電圧を整流平滑して第1の出力電圧(Vo1)を取り出す第1の整流平滑回路(D1,Co1)と、
前記第2スイッチング素子(Q2)のオン期間に前記トランス(T1)の二次巻線に発生する電圧を整流平滑して第2の出力電圧(Vo2)を取り出す第2の整流平滑回路(D2,Co2)と、
前記第1スイッチング素子(Q1)と前記第2スイッチング素子(Q2)とが相補的なオン/オフを繰り返すように駆動し、前記第1の出力電圧及び前記第2の出力電圧に基づいて、前記第1スイッチング素子(Q1)のオン時間及び前記第2スイッチング素子(Q2)のオン時間をそれぞれ制御し、前記第1の出力電圧(Vo1)及び前記第2の出力電圧(Vo2)を制御するスイッチング制御回路(10)と、を備える。
直流の入力電圧が入力される電源入力部に接続された、第3スイッチング素子(Q3)がハイサイド、第4スイッチング素子(Q4)がローサイドとなる第2の直列回路と、
少なくとも一次巻線と二次巻線が磁気的に結合されたトランス(T1)と、
前記第1スイッチング素子(Q1)と前記第2スイッチング素子(Q2)との接続点に一端が接続され、前記第3スイッチング素子(Q3)と前記第4スイッチング素子(Q4)との接続点に他端が接続された、前記トランス(T1)の一次巻線(L1)、インダクタ(Lr)及びキャパシタ(Cr)による直列共振回路と、
前記第1スイッチング素子(Q1)及び前記第4スイッチング素子(Q4)のオン期間に前記トランス(T1)の二次巻線に発生する電圧を整流平滑して第1の出力電圧を取り出す第1の整流平滑回路(D1,Co1)と、
前記第2スイッチング素子(Q2)及び前記第3スイッチング素子(Q3)のオン期間に前記トランス(T1)の二次巻線に発生する電圧を整流平滑して第2の出力電圧を取り出す第2の整流平滑回路(D2,Co2)と、
前記第1スイッチング素子(Q1)及び前記第4スイッチング素子(Q4)と、前記第2スイッチング素子(Q2)及び前記第3スイッチング素子(Q3)とが相補的なオン/オフを繰り返すように駆動し、前記第1の出力電圧及び前記第2の出力電圧に基づいて、前記第1スイッチング素子と前記第4スイッチング素子のオン時間及び前記第2スイッチング素子と前記第3スイッチング素子のオン時間をそれぞれ制御し、前記第1の出力電圧(Vo1)及び前記第2の出力電圧(Vo2)を制御するスイッチング制御回路(10)と、を備える。
前記第1の出力電圧をVo1、前記第2の出力電圧をVo2、前記第1スイッチング素子(Q1)のオン時間をTon1、前記第2スイッチング素子(Q2)のオン時間をTon2、第1の基準電圧をVref1、第2の基準電圧をVref2、とすれば、前記スイッチング制御回路は、
の関係で、前記第1の出力電圧検出回路の検出信号及び前記第2の出力電圧検出回路の検出信号に基づいて、前記第1の出力電圧Vo1及び前記第2の出力電圧Vo2がそれぞれ所定の電圧となるように、前記第1スイッチング素子(Q1)のオン時間Ton1及び前記第2スイッチング素子(Q2)のオン時間Ton2を多変数フィードバック制御する。
この構成により、二つの出力のバランスを良好に保てる。
第1の実施形態に係るスイッチング電源装置について図2・図3を参照して説明する。
図2は第1の実施形態に係るスイッチング電源装置101の回路図である。このスイッチング電源装置101は、少なくとも一次巻線L1、第1の二次巻線L21、及び第2の二次巻線L22がそれぞれ磁気的に結合されたトランスT1を備えている。直流の入力電圧Viが入力される電源入力部である電源入力端子Pi(+),Pi(G)には、第1スイッチング素子Q1及び第2スイッチング素子Q2が直列に接続されている。トランスT1の一次巻線L1と第2スイッチング素子Q2との間には、それらに直列に接続されて、一次巻線L1とともに直列共振回路を構成する共振コンデンサCr及びインダクタLrが設けられている。このインダクタLrは部品として設けられずに、トランスT1と複合して構成されていてもよい。
n1=N1/N21
n2=N1/N22
である。
第1スイッチング素子Q1のオン期間には次式が成り立つ。
図5は第2の実施形態に係るスイッチング電源装置102の回路図である。第1の実施形態で図2に示した回路と異なるのはトランスT1の一次側の構成である。図5の例では、第1スイッチング素子Q1をローサイドに設け、第2スイッチング素子Q2をハイサイドに設けている。回路動作は図2に示したスイッチング電源装置101と同じである。
図6は第3の実施形態に係るスイッチング電源装置103の回路図である。第1の実施形態で図2に示した回路と異なるのは、制御回路11,12の構成である。コンバータの動作は図2に示したスイッチング電源装置101と同じである。
図7に示すとおり、制御回路12の構成は制御回路11と同様である。
以上の動作を繰り返す。
図9(A)、図9(B)は第4の実施形態に係るスイッチング電源装置104A,104Bの回路図である。第1の実施形態で図2に示した回路と異なるのはトランスT1の二次側の構成である。コンバータの動作は図2に示したスイッチング電源装置101と同じである。
以上に示した各実施形態では、二つの二次巻線を備えたトランスを用いたが、第5の実施形態は単一の二次巻線を用いて、二つの出力電圧を得るようにしたものである。図10~図13は第5の実施形態に係る4つのスイッチング電源回路の二次側の回路図である。一次側の構成は既に各実施形態で示した何れの回路であってもよい。
以上に示した各実施形態では、トランスの一次側に二つのスイッチング素子を備えたが、第6の実施形態は4つのスイッチング素子を用いたものである。図14は第6の実施形態に係るスイッチング電源装置の一次側の回路図である。二次側の構成は既に各実施形態で示した何れの回路であってもよい。
このように一次側にブリッジ回路を構成してもよい。
CP1,CP2…コンパレータ
Cr…共振コンデンサ
D1,D2…ダイオード
D11,D12…ダイオード
D21,D22…ダイオード
EA1,EA1…誤差増幅器
FF1,FF2…フリップフロップ
GR1,GR2…ランプ波形発生回路
HD1,HD2…ハイサイドドライバ回路
L1…一次巻線
L2…二次巻線
L21…第1の二次巻線
L22…第2の二次巻線
Lb1、Lb2…補助巻線
Lr…インダクタ
PC1,PC2…フォトカプラ
Pi…電源入力端子
Po1…第1の電源出力端子
Po2…第2の電源出力端子
Q1…第1スイッチング素子
Q2…第2スイッチング素子
Q3…第3スイッチング素子
Q4…第4スイッチング素子
RL1,RL2…負荷
T1…トランス
Ton1…Q1のオン時間
Ton2…Q2のオン時間
Vi…入力電圧
Vfb1…フィードバック信号
Vo1…第1の出力電圧
Vo2…第2の出力電圧
Vref1,Vref2…基準電圧発生回路
Vsb1、Vsb2…補助巻線電圧
ZD1、ZD2…ゼロ電流検出回路
11,12…制御回路
101~103…スイッチング電源装置
104A,104B…スイッチング電源装置
Claims (9)
- 直流の入力電圧が入力される電源入力部に接続された、第1スイッチング素子及び第2スイッチング素子による直列回路と、
少なくとも一次巻線と二次巻線が磁気的に結合されたトランスと、
前記第1スイッチング素子又は前記第2スイッチング素子に並列に接続され、前記トランスの一次巻線とインダクタとキャパシタとが直列に接続された直列共振回路と、
前記第1スイッチング素子のオン期間に前記トランスの二次巻線に発生する電圧を整流平滑して第1の出力電圧を取り出す第1の整流平滑回路と、
前記第2スイッチング素子のオン期間に前記トランスの二次巻線に発生する電圧を整流平滑して第2の出力電圧を取り出す第2の整流平滑回路と、
前記第1スイッチング素子と前記第2スイッチング素子とが相補的なオン/オフを繰り返すように駆動し、前記第1の出力電圧及び前記第2の出力電圧に基づいて、前記第1スイッチング素子のオン時間及び前記第2スイッチング素子のオン時間をそれぞれ制御し、前記第1の出力電圧及び前記第2の出力電圧を制御するスイッチング制御回路と、を備えた、スイッチング電源装置。 - 直流の入力電圧が入力される電源入力部に接続された、第1スイッチング素子がハイサイド、第2スイッチング素子がローサイドとなる第1の直列回路と、
直流の入力電圧が入力される電源入力部に接続された、第3スイッチング素子がハイサイド、第4スイッチング素子がローサイドとなる第2の直列回路と、
少なくとも一次巻線と二次巻線が磁気的に結合されたトランスと、
前記第1スイッチング素子と前記第2スイッチング素子との接続点に一端が接続され、前記第3スイッチング素子と前記第4スイッチング素子との接続点に他端が接続された、前記トランスの一次巻線、インダクタ及びキャパシタによる直列共振回路と、
前記第1スイッチング素子及び前記第4スイッチング素子のオン期間に前記トランスの二次巻線に発生する電圧を整流平滑して第1の出力電圧を取り出す第1の整流平滑回路と、
前記第2スイッチング素子及び前記第3スイッチング素子のオン期間に前記トランスの二次巻線に発生する電圧を整流平滑して第2の出力電圧を取り出す第2の整流平滑回路と、
前記第1スイッチング素子及び前記第4スイッチング素子と、前記第2スイッチング素子及び前記第3スイッチング素子とが相補的なオン/オフを繰り返すように駆動し、前記第1の出力電圧及び前記第2の出力電圧に基づいて、前記第1スイッチング素子と前記第4スイッチング素子のオン時間及び前記第2スイッチング素子と前記第3スイッチング素子のオン時間をそれぞれ制御し、前記第1の出力電圧及び前記第2の出力電圧を制御するスイッチング制御回路と、を備えた、スイッチング電源装置。 - 前記第1の出力電圧を検出する第1の出力電圧検出回路と、前記第2の出力電圧を検出する第2の出力電圧検出回路と、を備え、
前記第1の出力電圧をVo1、前記第2の出力電圧をVo2、前記第1スイッチング素子のオン時間をTon1、前記第2スイッチング素子のオン時間をTon2、第1の基準電圧をVref1、第2の基準電圧をVref2、とすれば、前記スイッチング制御回路は、
(ここで、A,B,C,Dは伝達関数、L[]はラプラス変換)
の関係で、前記第1の出力電圧検出回路の検出信号及び前記第2の出力電圧検出回路の検出信号に基づいて、前記第1の出力電圧Vo1及び前記第2の出力電圧Vo2がそれぞれ所定の電圧となるように、前記第1スイッチング素子のオン時間Ton1及び前記第2スイッチング素子のオン時間Ton2を多変数フィードバック制御する、請求項1又は2に記載のスイッチング電源装置。 - 前記伝達関数A及び前記伝達関数Dをそれぞれ0に定めた、請求項3に記載のスイッチング電源装置。
- 前記二次巻線は、前記第1の出力電圧及び前記第2の出力電圧を発生する単一の巻線で構成された、請求項1乃至4の何れかに記載のスイッチング電源装置。
- 前記二次巻線は、前記第1の出力電圧を発生する第1の二次巻線と前記第2の出力電圧を発生する第2の二次巻線で構成された、請求項1乃至4の何れかに記載のスイッチング電源装置。
- 前記第1の二次巻線と前記第2の二次巻線はそれぞれ独立に巻回されていて、前記第1の整流平滑回路と前記第2の整流平滑回路の接地側同士が接続されている、請求項6に記載のスイッチング電源装置。
- 前記第1の二次巻線と前記第2の二次巻線はそれぞれ独立に巻回されていて、前記第1の整流平滑回路の接地側と前記第2の整流平滑回路の電圧出力側とが接続されている、又は前記第2の整流平滑回路の接地側と前記第1の整流平滑回路の電圧出力側とが接続されている、請求項6に記載のスイッチング電源装置。
- 前記スイッチング制御回路はDSP(Digital Signal Processor)で構成されている、請求項1乃至8の何れかに記載のスイッチング電源装置。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201180014080.0A CN102792576B (zh) | 2010-03-16 | 2011-02-24 | 开关电源装置 |
| JP2012505583A JP5447651B2 (ja) | 2010-03-16 | 2011-02-24 | スイッチング電源装置 |
| US13/591,254 US8891255B2 (en) | 2010-03-16 | 2012-08-22 | Switching power supply apparatus including simultanous control of multiple outputs |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-059484 | 2010-03-16 | ||
| JP2010059484 | 2010-03-16 | ||
| JP2010129590 | 2010-06-07 | ||
| JP2010-129590 | 2010-06-07 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/591,254 Continuation US8891255B2 (en) | 2010-03-16 | 2012-08-22 | Switching power supply apparatus including simultanous control of multiple outputs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011114850A1 true WO2011114850A1 (ja) | 2011-09-22 |
Family
ID=44648956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/054087 Ceased WO2011114850A1 (ja) | 2010-03-16 | 2011-02-24 | スイッチング電源装置 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8891255B2 (ja) |
| JP (1) | JP5447651B2 (ja) |
| CN (1) | CN102792576B (ja) |
| WO (1) | WO2011114850A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2717448A1 (en) * | 2012-10-04 | 2014-04-09 | Vestel Elektronik Sanayi ve Ticaret A.S. | Push-Pull switch mode power supply of forward type with two semi-independenly regulated outputs |
| US9071155B2 (en) | 2011-08-04 | 2015-06-30 | Murata Manufacturing Co., Ltd. | Switching power supply apparatus including a plurality of outputs |
| JP2016502830A (ja) * | 2012-10-18 | 2016-01-28 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | 負荷を駆動する駆動装置及び駆動方法 |
| US20210351708A1 (en) * | 2018-09-28 | 2021-11-11 | Karlsruher Institut für Technologie | Method for controlling a series resonant converter |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5527429B2 (ja) * | 2010-12-02 | 2014-06-18 | 株式会社村田製作所 | スイッチング電源回路 |
| US9806623B2 (en) * | 2011-12-09 | 2017-10-31 | Telefonaktiebolaget Lm Ericsson (Publ) | DC-DC converter with multiple outputs |
| JP2013236428A (ja) * | 2012-05-07 | 2013-11-21 | Sanken Electric Co Ltd | 直流変換装置 |
| CN103219890B (zh) * | 2013-03-29 | 2016-05-25 | 大洋电机新动力科技有限公司 | 一种igbt驱动模块的供电电源系统 |
| WO2016046826A1 (en) * | 2014-09-23 | 2016-03-31 | Advanced Magnetic Solutions, Limited | Resonant transformers and their applications |
| CA3002233C (en) * | 2015-10-13 | 2024-05-21 | Nissan Motor Co., Ltd. | Power converter |
| US11211869B2 (en) | 2017-03-17 | 2021-12-28 | National Instruments Corporation | LLC power supply current-sharing and frequency locking mechanism |
| DE102017106424B4 (de) | 2017-03-24 | 2021-09-02 | Infineon Technologies Austria Ag | Leistungswandlerschaltung mit einem Hauptwandler und einem Hilfswandler |
| CN108123604A (zh) * | 2017-12-28 | 2018-06-05 | 深圳Tcl新技术有限公司 | 谐振电源及电子设备 |
| US10811981B2 (en) * | 2018-01-25 | 2020-10-20 | Nxp B.V. | Apparatus and method for a dual output resonant converter to ensure full power range for both outputs |
| US10554135B2 (en) * | 2018-01-25 | 2020-02-04 | Nxp B.V. | Apparatus and method for improved small load performance of a dual output resonant converter |
| US10819240B2 (en) * | 2018-01-25 | 2020-10-27 | Nxp B.V. | Apparatus and method for adaptively setting the proper range for the VCM control variable based upon clipping of the main regulation loop |
| JP7166843B2 (ja) * | 2018-08-28 | 2022-11-08 | キヤノン株式会社 | 電源装置及び画像形成装置 |
| CN109585143A (zh) * | 2019-01-30 | 2019-04-05 | 袁亚蒙 | 一种浪涌式脉冲变压器 |
| CN210629356U (zh) * | 2019-08-27 | 2020-05-26 | 深圳Tcl新技术有限公司 | 一种llc电源控制电路和电源控制装置 |
| TWI762005B (zh) | 2020-01-20 | 2022-04-21 | 通嘉科技股份有限公司 | 非對稱電源轉換器及其操作方法 |
| JP7577980B2 (ja) * | 2020-11-27 | 2024-11-06 | 富士電機株式会社 | 電流検出回路、電源回路 |
| US20230207188A1 (en) * | 2021-12-27 | 2023-06-29 | Indian Institute Of Technology Kanpur | Differential transformer based voltage converter and method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001320879A (ja) * | 2000-04-26 | 2001-11-16 | Koninkl Philips Electronics Nv | Dc−dcコンバータ |
| JP2003018838A (ja) * | 2001-05-09 | 2003-01-17 | Koninkl Philips Electronics Nv | 共振コンバータ用制御装置 |
| JP2008219978A (ja) * | 2007-02-28 | 2008-09-18 | Sanken Electric Co Ltd | 多出力スイッチング電源装置 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01291663A (ja) * | 1988-05-16 | 1989-11-24 | Iwatsu Electric Co Ltd | 直流変換器 |
| JPH04121181U (ja) * | 1991-04-15 | 1992-10-29 | 株式会社東芝 | 電源保護回路 |
| DE4328458B4 (de) * | 1992-08-25 | 2005-09-22 | Matsushita Electric Industrial Co., Ltd., Kadoma | Schalt-Spannungsversorgung |
| JPH06303771A (ja) * | 1993-04-12 | 1994-10-28 | Sony Corp | スイッチングレギュレータ |
| JP2000152620A (ja) * | 1998-11-10 | 2000-05-30 | Sony Corp | スイッチング電源回路 |
| DE10122534A1 (de) * | 2001-05-09 | 2002-11-21 | Philips Corp Intellectual Pty | Resonanter Konverter |
| JP2004056926A (ja) * | 2002-07-19 | 2004-02-19 | Sony Corp | 高電圧出力装置 |
| JP2005151796A (ja) * | 2003-09-30 | 2005-06-09 | Sony Corp | スイッチング電源回路 |
| JP2007040227A (ja) | 2005-08-04 | 2007-02-15 | Denso Corp | インジェクタ |
| US7944085B2 (en) * | 2005-10-03 | 2011-05-17 | Sanken Electric Co., Ltd. | Multiple output switching power source apparatus including multiple series resonant circuits |
| JP2007174793A (ja) * | 2005-12-21 | 2007-07-05 | Sanken Electric Co Ltd | 多出力スイッチング電源装置 |
| JP4208018B2 (ja) * | 2007-02-16 | 2009-01-14 | サンケン電気株式会社 | 直流変換装置 |
| JP4245066B2 (ja) * | 2007-06-11 | 2009-03-25 | サンケン電気株式会社 | 多出力スイッチング電源装置 |
| JP4229202B1 (ja) * | 2007-08-27 | 2009-02-25 | サンケン電気株式会社 | 多出力スイッチング電源装置 |
| TWI338996B (en) * | 2007-10-16 | 2011-03-11 | Delta Electronics Inc | Resonant converter system having synchronous rectifier control circuit and controlling method thereof |
| JP4525817B2 (ja) * | 2008-10-30 | 2010-08-18 | サンケン電気株式会社 | スイッチング電源装置 |
-
2011
- 2011-02-24 CN CN201180014080.0A patent/CN102792576B/zh not_active Expired - Fee Related
- 2011-02-24 JP JP2012505583A patent/JP5447651B2/ja not_active Expired - Fee Related
- 2011-02-24 WO PCT/JP2011/054087 patent/WO2011114850A1/ja not_active Ceased
-
2012
- 2012-08-22 US US13/591,254 patent/US8891255B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001320879A (ja) * | 2000-04-26 | 2001-11-16 | Koninkl Philips Electronics Nv | Dc−dcコンバータ |
| JP2003018838A (ja) * | 2001-05-09 | 2003-01-17 | Koninkl Philips Electronics Nv | 共振コンバータ用制御装置 |
| JP2008219978A (ja) * | 2007-02-28 | 2008-09-18 | Sanken Electric Co Ltd | 多出力スイッチング電源装置 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9071155B2 (en) | 2011-08-04 | 2015-06-30 | Murata Manufacturing Co., Ltd. | Switching power supply apparatus including a plurality of outputs |
| EP2717448A1 (en) * | 2012-10-04 | 2014-04-09 | Vestel Elektronik Sanayi ve Ticaret A.S. | Push-Pull switch mode power supply of forward type with two semi-independenly regulated outputs |
| JP2016502830A (ja) * | 2012-10-18 | 2016-01-28 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | 負荷を駆動する駆動装置及び駆動方法 |
| US20210351708A1 (en) * | 2018-09-28 | 2021-11-11 | Karlsruher Institut für Technologie | Method for controlling a series resonant converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2011114850A1 (ja) | 2013-06-27 |
| CN102792576A (zh) | 2012-11-21 |
| US20120313433A1 (en) | 2012-12-13 |
| CN102792576B (zh) | 2015-06-24 |
| JP5447651B2 (ja) | 2014-03-19 |
| US8891255B2 (en) | 2014-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5447651B2 (ja) | スイッチング電源装置 | |
| JP5768886B2 (ja) | スイッチング電源装置 | |
| US9729063B2 (en) | Voltage adjustment system and method for parallel-stage power converter | |
| US8842449B1 (en) | LLC resonant converter with lossless primary-side current feedback | |
| US8988901B2 (en) | Switching power supply device | |
| EP3787171A1 (en) | Isolated dc/dc converters for wide output voltage range and control methods thereof | |
| CN101582643B (zh) | 开关电源 | |
| US9667152B2 (en) | Power conversion system and power conversion method | |
| US10644607B2 (en) | Auxiliary power supply apparatus and method for isolated power converters | |
| US20160105095A1 (en) | Pfc shutdown circuit for light load | |
| CN101512886A (zh) | 用于控制变换电路的适配电路 | |
| CN104201890B (zh) | 控制开关模式电源中的最小脉宽的方法 | |
| WO2010119760A1 (ja) | スイッチング電源装置 | |
| CN101325372A (zh) | 同步整流器电路及使用该电路的多输出电源装置 | |
| CN114726219B (zh) | 以电容电压为参照并通过辅助绕组检测电压的反激变换器 | |
| US7629781B2 (en) | Multi-output switching power supply | |
| JP4852910B2 (ja) | 多出力スイッチング電源装置 | |
| TWI867081B (zh) | 用於電力轉換器之電壓模式控制的數位非線性變換 | |
| JP2011083049A (ja) | 電圧変換装置 | |
| TWI328918B (en) | Multi-output dc-dc converter with improved cross-regulation performance | |
| WO2013021857A1 (ja) | スイッチング電源装置 | |
| US20210288583A1 (en) | Dc power supply circuit | |
| CN102053194B (zh) | 应用于驰返式转换器一次侧的输出电流感测装置及方法 | |
| CN115706531A (zh) | 功率转换器控制器、功率转换器及操作功率转换器的方法 | |
| JP7126625B2 (ja) | 負荷を駆動するための変換器、ledドライバ及びled照明装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201180014080.0 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11756039 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2012505583 Country of ref document: JP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 11756039 Country of ref document: EP Kind code of ref document: A1 |