WO2005107053A1 - スイッチング電源装置 - Google Patents
スイッチング電源装置 Download PDFInfo
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- WO2005107053A1 WO2005107053A1 PCT/JP2005/007602 JP2005007602W WO2005107053A1 WO 2005107053 A1 WO2005107053 A1 WO 2005107053A1 JP 2005007602 W JP2005007602 W JP 2005007602W WO 2005107053 A1 WO2005107053 A1 WO 2005107053A1
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- Prior art keywords
- resonance
- switching element
- voltage
- transformer
- power supply
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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
- H02M3/33569—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
- H02M3/01—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
- 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
- H02M3/337—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 in push-pull configuration
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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
Definitions
- the present invention relates to a high-efficiency switching power supply device, and in particular, to a current resonance type power supply device that detects a period during which energy is transmitted from the primary side to the secondary side of a resonant transformer in order to maintain an optimal resonance state.
- the present invention relates to a switching power supply device.
- Fig. 1 shows a conventional current resonance type switching power supply device.
- the full-wave rectifier circuit 2 (corresponding to the input rectifier circuit) rectifies the AC voltage of the AC power supply 1 and outputs the full-wave current voltage to the smoothing capacitor 3.
- the smoothing capacitor 3 smoothes the full-wave current voltage of the full-wave rectifier circuit 2.
- a series circuit of a first switching element Q1 composed of a MOSFET or the like and a second switching element Q2 also composed of a MOS FET or the like is connected.
- a rectifier (diode) 6 is connected in parallel to the first switching element Q1
- a rectifier 7 is connected in parallel to the second switching element Q2.
- a voltage resonance capacitor Crv is connected in parallel to the first switching element Q1.
- a series circuit of a current resonance capacitor Cri, a rear turtle, and a primary winding P1 of the resonance transformer T is connected in parallel to the first switching element Q1.
- the resonance circuit is composed of the voltage resonance capacitor C rv, the current resonance capacitor Cri, the resonance rear turtle Lr, and the primary winding P1 of the resonance transformer T.
- the primary winding P1 and the secondary winding S of the resonance transformer T are wound so that a common-mode voltage is generated therebetween.
- the secondary winding S of the resonance transformer T includes a rectifier D and a smoothing capacitor. 14 and from
- This rectifying / smoothing circuit rectifies and smoothes the voltage (pulse voltage controlled on / off) in the secondary winding s of the resonance transformer ⁇ , and outputs a DC output to the load 16.
- the voltage detection circuit 15 is connected to both ends of the smoothing capacitor 14, detects the output voltage of the smoothing capacitor 14, and outputs the detected voltage to the control circuit 11a.
- the control circuit 11a The voltage of the load 16 is controlled to a constant voltage by alternately turning on and off the first switching element Ql and the second switching element Q2 by PWM control based on the detection voltage from the output circuit 15. . In this case, by applying a voltage to each gate of the first switching element Q1 and the second switching element Q2, the first switching element Q1 and the second switching element Q2 are alternately turned on and off.
- FIG. 2 is a timing chart of signals in each part of the switching power supply device.
- FIG. 3 is a timing chart of each signal in detail showing a period during which energy is transmitted from the primary side to the secondary side of the resonant transformer in the switching power supply device.
- FIG. 4 is a detailed timing chart in each period T1 to T10 of a signal in each section of the switching power supply device.
- I is the current flowing through the primary winding P1
- V is the first current
- the voltage across the switching element Q1, I is the current flowing through the first switching element Q1
- V is the voltage across the switching element Q1
- V is the voltage of rectifier D
- I is the current flowing through rectifier D
- V is the primary winding
- the voltage across PI, V indicates the voltage across secondary winding S. Also, the resonant rear turtle Lr is
- the excitation inductance Lp of the primary winding P1 is sufficiently smaller than the excitation inductance Lp, and the voltage resonance capacitor Crv is sufficiently smaller than the current resonance capacitor Cri.
- the first switching element Q1 has been turned off, and the second switching element Q2 has been turned off. Due to the energy stored in the excitation inductance of the resonant rear turtle Lr and the resonant transformer T, the current I is changed by the resonant rear turtle Lr ⁇ primary winding Pl ⁇
- Resonant current flows through the path of voltage resonance capacitor Crv ⁇ current resonance capacitor Cri ⁇ resonance rear turtle Lr.
- the resonance of the excitation inductance Lp of the resonance transformer T, the resonance reactor Lr, and the voltage resonance capacitor Crv discharges the voltage resonance capacitor Crv, and the voltage V decreases.
- the current I is calculated as follows: Resonator 6 ⁇ Current resonance capacitor Cri ⁇ Resonance rear turtle Resonance current continues to flow through Lr. At this time, the first switching element Q1 is turned on, and the process proceeds to the period T3. In the period T3, the first switching element Q1 is on, and the second switching element Q2 is off.
- the current I is the resonance rear turtle Lr ⁇ the primary winding Pl ⁇ the first switching element Ql ⁇ the current resonance
- Resonator current flows in the path of capacitor Cri ⁇ first switching element Ql ⁇ —next winding P1 and resets the magnetic flux of transformer T.
- the resonance current flows through the path of the vibration capacitor Crv ⁇ —the next winding P1. Also, Cr V is charged by the resonance between the exciting inductance Lp of the resonance transformer, the resonance rear turtle Lr, and the voltage resonance capacitor Crv, and the voltage V rises and the voltage V falls.
- the second switching element Q2 is turned on, and the first switching element Q1 is turned off. is there.
- the second switching element Q2 ⁇ —Next winding Pl ⁇ Resonance rear turtle Lr ⁇ Current resonance capacitor Critical current I and current I flow through the path, and current I flows to the rectifier D on the secondary side.
- the second switching element Q2 keeps the ON state, and the current I and the current I and Q flow through the path of the current resonance capacitor Cri ⁇ the resonance rear turtle Lr ⁇ the primary winding Pl ⁇ the second switching element Q2.
- the current I and the current I flow due to the resonance between the magnetic inductance Lp, the resonance reactor Lr, and the current resonance capacitor Cri. Then, the period T10 (depending on the oscillation frequency or duty ratio)
- the second switching element Q2 is turned off and the first switching element Q1 is turned on, and the reset period t3 (corresponding to the periods T1 to T5) is started.
- the second switching element Q2 is turned off during the period tl during which energy is supplied to the secondary side, zero current switching is not performed, and the switching loss of the second switching element Q2 increases. In the worst case, it can lead to damage.
- the second switching element Q2 in consideration of input voltage fluctuations, load fluctuations, etc., in all states, the second switching element Q2 is turned off in the period tl, and a sufficiently large on-period ( tl + t2).
- the period t2 had to be increased by that amount so that resonance did not deviate due to variations in components and changes in characteristics due to the surrounding environment.
- FIG. 1 To solve such a problem, there is a series resonant converter described in Japanese Patent Publication No. 7-63216, and a configuration diagram of this converter is shown in FIG.
- a series circuit of two switching elements 102 and 103, a series circuit of two rectifiers 104 and 105, and a series circuit of two capacitors 106 and 107 are connected to a DC power supply 101, and a rectifier is provided.
- a connection point between 104 and 105 and a connection point between capacitors 106 and 107 are connected, and a primary winding of a transformer 108 and a reactor 109 are connected between a connection point between rectifiers 104 and 105 and a connection point between switching elements 102 and 103.
- a series circuit is connected, and a rectifier circuit 110 and an output capacitor 111 are connected to a secondary winding of the transformer 108.
- the converter further compares a transformer voltage detection circuit 130 for detecting a voltage of a secondary winding of the transformer 108 with an output of the transformer voltage detection circuit 130 and a drive signal for controlling a switching element, and generates a voltage in the transformer 108.
- a logic circuit 150 that turns on the switching elements 102 and 103 and turns off the switching elements 102 and 103 after the voltage of the transformer 108 has been lost.
- the output of the transformer voltage detection circuit 30 is compared with a drive signal for controlling the switching element.
- a logic circuit 150 must be provided to turn on the switching elements 102 and 103, and to turn off the switching elements 102 and 103 after the voltage of the transformer 108 has been lost.
- switching control having a simple circuit configuration and capable of accurately detecting a period in which energy is supplied from the primary side to the secondary side of the transformer and having an optimum on-period without causing resonance to be lost.
- a resonance-type switching power supply device capable of performing the following.
- a switching power supply includes a resonance transformer having a primary winding, a secondary winding, and an auxiliary winding tightly coupled to the secondary winding.
- a first series circuit in which a first switching element and a second switching element connected in parallel to an output of an AC power supply are connected in series, and connected to both ends of the first switching element or the second switching element.
- a resonance capacitor a second series circuit in which a resonance reactor and a primary winding of the resonance transformer are connected in series, a rectification smoothing circuit that rectifies and smoothes a voltage of a secondary winding of the resonance transformer,
- a control circuit for alternately turning on and off the first switching element and the second switching element based on an output voltage of the rectifying and smoothing circuit; and a primary side of the resonance transformer based on a voltage of an auxiliary winding of the resonance transformer.
- Power A resonance period detector that detects a period during which energy is being transmitted to the secondary side and outputs a resonance period detection signal.
- the resonance period detector includes a rectifier connected in series to the auxiliary winding; A first resistor connected in parallel to a series circuit of the auxiliary winding and the rectifier, and a second resistor connected in parallel to the first resistor via a coupling capacitor; It is characterized in that it outputs the voltage across the two resistors.
- the resonance period detector is connected in parallel to the auxiliary winding via a coupling capacitor.
- a rectifier connected to the rectifier; and a resistor connected in parallel with the rectifier, and outputting a voltage between both ends of the resistor.
- the resonance period detector sends the resonance period detection signal to the control circuit
- the control circuit performs a previous operation based on a resonance period detection signal from the resonance period detector. It is characterized in that control is performed so as to keep the ON state or the OFF state of each of the switching elements during a period in which energy is transmitted from the primary side to the secondary side of the resonance transformer.
- the rectifying / smoothing circuit rectifies a voltage of a secondary winding of the resonance transformer. It has a switching element, and the resonance period detector turns on / off the third switching element by the resonance period detection signal.
- the switching device comprises a primary winding, a secondary winding, a first auxiliary winding and a second auxiliary winding tightly coupled to the secondary winding.
- a first series circuit in which a first switching element and a second switching element connected in parallel to an output of a non-AC power supply are connected in series, and the first switching element or the second switching.
- a second series circuit in which a resonance capacitor, a resonance reactor, and a primary winding of the resonance transformer are connected in series at both ends of the element; a rectification smoothing circuit that rectifies and smoothes the voltage of the secondary winding of the resonance transformer; A control circuit for alternately turning on and off the first switching element and the second switching element based on the output voltage of the rectifying and smoothing circuit; and a control circuit for controlling the resonance transformer based on a voltage of a first auxiliary winding of the resonance transformer.
- a first resonance period detector that detects a period during which energy is being transmitted from the secondary side to the secondary side and outputs a resonance period detection signal; and a first resonance period detector based on a voltage of a second auxiliary winding of the resonance transformer.
- a second resonance period detector for detecting a period during which energy is transmitted to the secondary side and outputting a resonance period detection signal, wherein the rectifying and smoothing circuit includes a secondary winding of the resonance transformer. It has a third switching element for rectifying the voltage of the line, and the second resonance period detector turns on and off the third switching element by the resonance period detection signal.
- FIG. 1 is a circuit configuration diagram showing a conventional example 1 of a conventional switching power supply device.
- FIG. 2 is a timing chart of a signal in each section of the switching power supply device of Conventional Example 1.
- FIG. 3 is a diagram illustrating the switching power supply device of Conventional Example 1 from the primary side of the resonant transformer. 6 is a timing chart of each signal showing in detail a period during which energy is transmitted to the next side.
- FIG. 4 is a detailed timing chart in signal periods T1 to T10 in each part of the switching power supply of Conventional Example 1.
- FIG. 5 is a circuit configuration diagram of a related switching power supply device.
- FIG. 6 is a circuit configuration diagram showing a switching power supply device according to Embodiment 1.
- FIG. 7 is a diagram illustrating a configuration example 1 of a resonance period detection circuit provided in the switching power supply device according to the first embodiment.
- FIG. 8 is a diagram illustrating a configuration example 2 of a resonance period detection circuit provided in the switching power supply device according to the first embodiment.
- FIG. 9 is a timing chart of signals in each part of the switching power supply device according to the first embodiment.
- FIG. 10 is a diagram showing a configuration example in which a secondary winding and an auxiliary winding of a resonance transformer provided in the switching power supply device of Embodiment 1 are tightly coupled.
- FIG. 11 is a circuit configuration diagram illustrating a switching power supply device according to Embodiment 2.
- FIG. 12 is a circuit configuration diagram illustrating a switching power supply device according to a third embodiment.
- FIG. 6 is a circuit configuration diagram illustrating the switching power supply device according to the first embodiment.
- the switching power supply device of the first embodiment is characterized in that an auxiliary winding # 2 and a resonance period detection circuit 12 are added to the conventional switching power supply device shown in FIG.
- the auxiliary winding # 2 is provided in the resonance transformer # and is tightly coupled to the secondary winding S.
- the resonance period detection circuit 12 detects a period during which energy is transmitted to the primary force and the secondary side of the resonance transformer ⁇ ⁇ ⁇ based on the voltage of the auxiliary winding ⁇ 2 of the resonance transformer ⁇ , and outputs a resonance period detection signal to the control circuit 11. I do.
- the control circuit 11 turns on and off the first switching element Q1 and the second switching element Q2 alternately by PWM control based on the detection voltage from the voltage detection circuit 15, thereby changing the voltage of the load 16 to a constant voltage. To control.
- control circuit 11 controls the ON state of the second switching element Q2 during a period in which energy is transmitted to the primary side and the secondary side of the resonance transformer T based on the resonance period detection signal from the resonance period detection circuit 12. , And the first switching element Q1 is controlled so as to keep the off state.
- FIG. 6 The other configuration shown in FIG. 6 is the same as the configuration shown in FIG. 1, and the same portions are denoted by the same reference characters and description thereof will not be repeated.
- the resonance rear turtle Lr also functions as a leakage inductance between the primary winding P1 and the secondary winding S of the resonance transformer T.
- the rectifier 6 connected in parallel to the first switching element Q1 is a rectifier 7 connected in parallel to the second switching element Q2, which may be a parasitic diode of the first switching element Q1. It may be a parasitic diode of the switching element Q2.
- the voltage resonance capacitor Crv connected in parallel to the first switching element Q1 may be a parasitic capacitance of the first switching element Q1.
- FIG. 7 is a diagram illustrating a configuration example 1 of the resonance period detection circuit provided in the switching power supply device according to the first embodiment.
- the resonance period detection circuit 12 shown in FIG. 7 includes a rectifier 19 connected in series to the auxiliary winding P2, a voltage detection resistor R1 connected in parallel to a series circuit of the auxiliary winding P2 and the rectifier 19,
- the voltage detection resistor R1 is configured to have a voltage detection resistor R2 connected in parallel via a coupling capacitor 20. The voltage across the voltage detection resistor R2 is output to the control circuit 11 as a resonance period detection signal. You.
- FIG. 8 is a diagram illustrating a configuration example 2 of the resonance period detection circuit provided in the switching power supply device according to the first embodiment.
- the resonance period detection circuit 12 shown in FIG. 8 includes a rectifier 19 connected in parallel to the auxiliary winding P2 via a coupling capacitor 20, and a voltage detection resistor R3 connected in parallel to the rectifier 19. The voltage across the voltage detection resistor R3 is output to the control circuit 11 as a resonance period detection signal.
- the basic operation is the same as the operation of the conventional switching power supply (the timing charts shown in FIGS. 2 to 4).
- the operation of the auxiliary winding P2 and the resonance period detecting circuit 12 is shown in FIG. This will be described with reference to the timing chart shown in FIG.
- I is the current flowing through the primary winding P1
- V is the second switching current
- V is the voltage across auxiliary winding P2
- V is the voltage across voltage sensing resistor R1.
- Terminal voltage V is the voltage across the voltage detection resistor R2
- V is the voltage across the voltage detection resistor R3.
- the voltage V induced in the secondary winding S of the resonance transformer T is the second switching element Q2
- the output voltage is clamped to the voltage obtained by adding the forward voltage drop of the rectifier D.
- the second switching element Q2 is turned on.
- the voltage is lower than the output voltage during the period t2 in which no energy is supplied from the primary side to the secondary side of the resonant transformer T. Since the auxiliary winding P2 of the resonance transformer is tightly coupled to the secondary winding S, a voltage V which is twice the turn ratio of the secondary winding S to the auxiliary winding P2 is induced.
- the voltage V generated in the voltage detection resistor R 1 is changed by the voltage switching induced by the auxiliary winding P 2 from the second switching element Q 2.
- the waveform obtained by the rectifier 19 is only the period (tl + t2) during which the power is turned on. Furthermore, the voltage generated at the voltage detection resistor R1 is passed through a coupling capacitor to extract only the AC component at the voltage detection resistor R2.
- the energy is supplied from the primary side to the secondary side for a period of tl.
- the voltage V generated at the voltage detection resistor R3 is as shown in FIG.
- control circuit 11 detects the voltage V generated at the voltage detection resistor R3.
- the time tl during which energy is supplied to the secondary side can be detected from the voltage level of R3. For example, if the voltage for the period tl is VI and the voltage for the period t2 is V2, a threshold value is set between VI and V2. A certain period
- the interval is tl.
- the switching power supply device of the first embodiment by detecting the voltage level of the auxiliary winding P2, the period tl during which the resonance transformer T supplies energy to the secondary side is detected. can do. Further, the control circuit 11 transmits energy from the primary side to the secondary side of the resonance transformer T based on the voltage generated at the voltage detection resistor from the resonance period detection circuit 12, and outputs the energy during the second period tl. Control is performed so as to keep the ON state of the switching element Q2 and the OFF state of the first switching element Q1.
- the second switching element Q2 does not turn off during the period tl during which energy is supplied to the secondary side, zero current switching is performed, and the switching loss of the second switching element Q2 is reduced and the efficiency is reduced. Can be improved. Further, if the ON period of the second switching element Q2 is set to be equal to or longer than the period tl and the period t2 is made shorter, the loss can be reduced and the efficiency can be further improved. That is, it is possible to perform switching control having an optimum ON period without causing resonance to be lost. Further, the period tl during which energy is supplied to the secondary side of the resonance transformer T can be detected with a simple circuit configuration as shown in FIGS.
- FIG. 10 is a diagram illustrating a configuration example in which the secondary winding and the auxiliary winding of the resonance transformer provided in the switching power supply device of Embodiment 1 are tightly coupled.
- a cylindrical split bobbin 31 having flange portions 3 la to 31c is attached to a center leg 30a constituting one magnetic path of a core 30 having magnetic force.
- the primary winding PI is wound between the flange portions 31a and 31b of the divided bobbin 31, the secondary winding S is wound between the flange portions 31b and 31c, and the auxiliary winding P2 is placed on the secondary winding S. Is wound, and the auxiliary winding P2 is tightly coupled to the secondary winding S.
- the core 30 has a rectangular outer shape, and gaps 35a and 35b are formed in the core 30 so as to form magnetic paths 30a, 30b and 30c in parallel with the longitudinal direction of the magnetic paths.
- a cylindrical bobbin 32 having a flange portion 32 is attached to the center leg 30a of the core 30, and a primary winding P1 is wound around the bobbin 32.
- the secondary winding S is wound on the primary winding P1
- the auxiliary winding P2 is wound on the secondary winding S
- the auxiliary winding P2 is tightly coupled to the secondary winding S.
- each of the windings is wound at the same position with respect to the winding frame.
- the primary winding P1 and the secondary winding are arranged.
- the winding position of S is shifted with respect to the winding frame, the primary winding P1 and the secondary winding S are loosely coupled, and the winding positions of the secondary winding S and the auxiliary winding P2 are aligned.
- the auxiliary winding P2 is tightly coupled to the secondary winding S from the primary winding P1.
- FIG. 11 is a circuit configuration diagram showing a switching power supply device according to the second embodiment.
- the switching power supply of the second embodiment shown in FIG. 11 is different from the switching power supply of the first embodiment shown in FIG. 6 in that a rectifier D provided on the secondary side of the resonance transformer T is used instead of the rectifier D.
- a synchronous rectifier circuit is provided between the next winding S and the smoothing capacitor 14 so that a switching element Q3 composed of a MOSFET or the like and a rectifier 18 have a parallel circuit power.
- a switching element Q3 composed of a MOSFET or the like and a rectifier 18 have a parallel circuit power.
- an auxiliary winding P2 and a resonance period detection circuit 12a are provided, and the resonance period detection circuit 12a turns on and off the switching element Q3 by a resonance period detection signal based on a voltage generated in the auxiliary winding P2.
- the switching element Q3 since the switching element Q3 is turned on and off by the resonance period detection signal from the resonance period detection circuit 12a, the switching element Q3 is supplied only during the period tl during which energy is supplied from the primary side to the secondary side of the resonance transformer T. By turning on, synchronous rectification operation can be performed.
- FIG. 12 is a circuit configuration diagram showing a switching power supply device according to the third embodiment.
- the switching power supply of the third embodiment shown in FIG. 12 is a combination of the switching power supply of the first embodiment shown in FIG. 6 and the switching power supply of the second embodiment shown in FIG.
- the resonance transformer T has a primary winding P1, a secondary winding S, and a first auxiliary winding P2 and a second auxiliary winding S2 tightly coupled to the secondary winding S. .
- the first auxiliary winding P2 and the resonance period detection circuit 12 are provided on the primary side of the resonance transformer T, and the second auxiliary winding S2 and the resonance period detection circuit 12a are provided on the secondary side.
- the resonance period detection circuit 12 detects the resonance period based on the voltage of the first auxiliary winding P2 of the resonance transformer T. A period during which energy is transmitted from the primary side to the secondary side of the lance T is detected, and a resonance period detection signal is output. Based on the resonance period detection signal from the resonance period detection circuit 12, the control circuit 11 transmits the energy from the primary side to the secondary side of the resonance transformer ⁇ during the period when the second switching element Q2 is in the on state, 1 Control to keep the switching element Q1 off.
- a synchronous rectifier circuit that also has a parallel circuit power of the switching element Q3 that also has the power of the MOSFET and the rectifier 18.
- the resonance period detection circuit 12a detects a period during which energy is transmitted from the primary side to the secondary side of the resonance transformer based on the voltage of the second auxiliary winding S2 of the resonance transformer T, and detects the switching element based on the resonance period detection signal. Turn Q3 on and off.
- the switching power supply device of Embodiment 3 by providing the resonance period detection circuits 12, 12a on the primary side and the secondary side of the resonance transformer T, the respective switching elements Q1 to Q3 are optimized. It is possible to turn on and off at the timing of.
- the present invention is not limited to the first to third embodiments.
- the power supply connected to both ends of the series circuit of the first switching element Q1 and the second switching element Q2 is As long as it is a non-AC power supply, a DC power supply may be used. That is, in the present invention, a series circuit of the first switching element Q1 and the second switching element Q2 is connected in parallel to the output of the non-AC power supply.
- a series circuit of the current resonance capacitor Cri, the rear turtle Lr, and the primary winding P1 of the resonance transformer T is connected to both ends of the first switching element Q1.
- a series circuit of the current resonance capacitor Cri, the rear turtle Lr, and the primary winding PI of the resonance transformer T may be connected to both ends of the second switching element Q2.
- the voltage resonance capacitor Crv is connected to both ends of the second switching element Q2. Good.
- the auxiliary winding of the resonance transformer is densely connected to the secondary winding.
- the resonance period detecting means detects a period during which energy is transmitted from the primary side of the resonance transformer to the secondary side based on the voltage of the auxiliary winding, and outputs a resonance period detection signal. Can be accurately detected.
- a period during which energy is supplied to the secondary side can be accurately detected with a simple circuit configuration.
- control circuit is configured to transmit the energy to the secondary force on the primary side of the resonance transformer based on the resonance period detection signal from the resonance period detection means. Controls the switching element so that it keeps on or off, so that it is possible to perform switching control with an optimal on-period without causing loss of resonance, thus improving efficiency. .
- the resonance period detecting means turns on / off the third switching element by the resonance period detection signal, so that only during the period when energy is supplied to the secondary side.
- a synchronous rectification operation can be performed.
- the respective switching elements are provided. Can be turned on and off at the optimal timing.
- the present invention is applicable to switching power supply devices such as DC-DC converters and AC-DC converters.
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Abstract
Description
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/587,576 US7522430B2 (en) | 2004-04-28 | 2005-04-21 | Switching power supply apparatus |
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JP2004133266A JP3744525B2 (ja) | 2004-04-28 | 2004-04-28 | スイッチング電源装置 |
JP2004-133266 | 2004-04-28 |
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WO2005107053A1 true WO2005107053A1 (ja) | 2005-11-10 |
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PCT/JP2005/007602 WO2005107053A1 (ja) | 2004-04-28 | 2005-04-21 | スイッチング電源装置 |
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US (1) | US7522430B2 (ja) |
JP (1) | JP3744525B2 (ja) |
KR (1) | KR100819629B1 (ja) |
CN (1) | CN100525036C (ja) |
WO (1) | WO2005107053A1 (ja) |
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JP4423157B2 (ja) * | 2004-10-06 | 2010-03-03 | キヤノン株式会社 | 電力線通信装置およびその制御方法 |
JP4506469B2 (ja) * | 2005-01-06 | 2010-07-21 | サンケン電気株式会社 | 共振型電源装置 |
KR20070110997A (ko) * | 2006-05-16 | 2007-11-21 | 페어차일드코리아반도체 주식회사 | 스위치 구동장치, 이를 사용하는 하프 브릿지 컨버터 및 그구동방법 |
US20080025050A1 (en) * | 2006-07-25 | 2008-01-31 | Lv Power (2003) Ltd. | Wide Input Range Power Supply |
JP5042881B2 (ja) * | 2007-09-25 | 2012-10-03 | パナソニック株式会社 | スイッチング電源装置 |
JP5042880B2 (ja) * | 2007-09-25 | 2012-10-03 | パナソニック株式会社 | スイッチング電源装置 |
JP5022209B2 (ja) * | 2007-12-25 | 2012-09-12 | パナソニック株式会社 | 電源アダプタ |
JP5042882B2 (ja) * | 2008-02-25 | 2012-10-03 | パナソニック株式会社 | スイッチング電源装置 |
JP5217535B2 (ja) * | 2008-03-17 | 2013-06-19 | サンケン電気株式会社 | Dc−dcコンバータ |
US9257225B2 (en) * | 2008-07-02 | 2016-02-09 | Chun Li | Methods and configurations of LC combined transformers and effective utilizations of cores therein |
US8451632B2 (en) * | 2009-03-12 | 2013-05-28 | System General Corporation | Dual-Switches flyback power converter with self-excited supply to power the high-side driver |
JP5218456B2 (ja) * | 2010-03-17 | 2013-06-26 | サンケン電気株式会社 | Led駆動装置 |
JP2011072076A (ja) * | 2009-09-24 | 2011-04-07 | Sanken Electric Co Ltd | 直流変換装置 |
CN101820222B (zh) * | 2010-06-18 | 2012-06-27 | 陶顺祝 | 全电压范围llc谐振变换器及控制方法 |
US8817494B2 (en) * | 2010-08-09 | 2014-08-26 | Sanken Electric Co., Ltd. | PFC AC/DC converter reducing harmonics, switching loss, and switching noise |
JP5761206B2 (ja) | 2011-02-01 | 2015-08-12 | 富士電機株式会社 | 共振型スイッチング電源装置 |
WO2013058174A1 (ja) * | 2011-10-21 | 2013-04-25 | 株式会社村田製作所 | スイッチング電源装置 |
JP5991078B2 (ja) | 2012-08-27 | 2016-09-14 | 富士電機株式会社 | スイッチング電源装置 |
KR101532131B1 (ko) * | 2013-04-29 | 2015-06-26 | 삼성전기주식회사 | 공진형 전원 공급 장치 |
US20150103562A1 (en) * | 2013-10-16 | 2015-04-16 | Acbel Polytech Inc. | Switching Power Supply with a Resonant Converter and Method Controlling the Same |
DE102015106335A1 (de) * | 2015-04-24 | 2016-10-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zum Betreiben eines Gleichstromwandlers |
US10958179B2 (en) | 2018-09-11 | 2021-03-23 | Semiconductor Components Industries, Llc | Reduced voltage switching of a main switch in flyback power converters |
US10790753B2 (en) * | 2018-09-11 | 2020-09-29 | Semiconductor Components Industries, Llc | Reduced voltage switching of a main switch in flyback power converters |
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2004
- 2004-04-28 JP JP2004133266A patent/JP3744525B2/ja not_active Expired - Fee Related
-
2005
- 2005-04-21 CN CNB2005800135845A patent/CN100525036C/zh not_active Expired - Fee Related
- 2005-04-21 KR KR1020067024564A patent/KR100819629B1/ko not_active IP Right Cessation
- 2005-04-21 WO PCT/JP2005/007602 patent/WO2005107053A1/ja active Application Filing
- 2005-04-21 US US11/587,576 patent/US7522430B2/en not_active Expired - Fee Related
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JPS56168240A (en) * | 1980-05-29 | 1981-12-24 | Matsushita Electric Ind Co Ltd | Constant-voltage regulated power supply |
JPS5999581U (ja) * | 1982-12-23 | 1984-07-05 | 株式会社東芝 | トランス |
JPH03103069A (ja) * | 1989-09-13 | 1991-04-30 | Shindengen Electric Mfg Co Ltd | 直列共振形コンバータ |
JPH0866025A (ja) * | 1994-08-10 | 1996-03-08 | Sanken Electric Co Ltd | 共振型スイッチング電源装置 |
JP2000023455A (ja) * | 1998-06-29 | 2000-01-21 | Sony Corp | 共振型スイッチング電源 |
JP7063216B2 (ja) * | 2018-09-27 | 2022-05-09 | 日本電信電話株式会社 | 錯覚呈示システム、および錯覚呈示方法 |
Also Published As
Publication number | Publication date |
---|---|
JP3744525B2 (ja) | 2006-02-15 |
KR20070002097A (ko) | 2007-01-04 |
CN100525036C (zh) | 2009-08-05 |
US20070274105A1 (en) | 2007-11-29 |
US7522430B2 (en) | 2009-04-21 |
CN1950996A (zh) | 2007-04-18 |
KR100819629B1 (ko) | 2008-04-07 |
JP2005318719A (ja) | 2005-11-10 |
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