WO2021003652A1 - 集成车载充电机的有源箝位正反激组合式电路 - Google Patents
集成车载充电机的有源箝位正反激组合式电路 Download PDFInfo
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- WO2021003652A1 WO2021003652A1 PCT/CN2019/095153 CN2019095153W WO2021003652A1 WO 2021003652 A1 WO2021003652 A1 WO 2021003652A1 CN 2019095153 W CN2019095153 W CN 2019095153W WO 2021003652 A1 WO2021003652 A1 WO 2021003652A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
Definitions
- the invention relates to the technical field of electronic circuits, in particular to an active clamp forward and flyback combined circuit integrated with a vehicle-mounted charger.
- Active clamp forward and flyback combined circuits have been widely used in power supplies, such as switching power supplies for new energy vehicles.
- Active clamp forward and flyback combined circuit is a topological circuit suitable for occasions with high conversion power, low output voltage and high output current.
- the active clamp forward and flyback combination circuit needs to be further optimized.
- the embodiment of the present invention provides an active clamp forward and flyback combined circuit, a switching power supply, and a vehicle-mounted device integrated with a vehicle-mounted charger, which can improve the adaptation range of the input voltage of the circuit.
- the first aspect of the embodiments of the present invention provides an active clamp forward and flyback combined circuit integrated with a vehicle charger, including:
- the first primary circuit, the second primary circuit, the transformer and the secondary rectifier circuit, the transformer includes a first primary winding, a second primary winding, an iron core and a secondary winding, wherein:
- the first primary circuit is connected in series with the second primary circuit, the first primary circuit is connected to the first primary winding, and the second primary circuit is connected to the second primary winding, so The first primary winding is connected in series with the second primary winding; the secondary winding is connected to the secondary rectifier circuit;
- the first primary circuit and the second primary circuit respectively generate a first voltage signal and a second voltage signal based on the input high voltage signal, and the first voltage signal and the second voltage signal are in the transformer Is converted into a first magnetic flux and a second magnetic flux respectively, the direction of the first magnetic flux is the same as the direction of the second magnetic flux, and the third magnetic flux superimposed by the first magnetic flux and the second magnetic flux is converted into an induced electromotive force, The induced electromotive force is converted into a low voltage signal in the secondary winding and output.
- the first primary circuit includes a first capacitor, a second capacitor, a first transistor, and a second transistor, wherein:
- the first port of the first capacitor is connected to the first port of the second capacitor
- the second port of the second capacitor is connected to the drain of the first transistor
- the source of the first transistor is connected to The drain of the second transistor is connected
- the source of the second transistor is connected to the second port of the first capacitor
- the first port of the first primary winding is connected to the first port of the first capacitor.
- the port is connected to the first port of the second capacitor, and the second port of the first primary winding is connected to the source of the second transistor and the second port of the first capacitor.
- the second primary circuit includes a third capacitor, a fourth capacitor, a third transistor, and a fourth transistor, wherein:
- the first port of the third capacitor is connected to the first port of the fourth capacitor
- the second port of the third capacitor is connected to the drain of the third transistor
- the source of the third transistor is connected to The drain of the fourth transistor is connected
- the source of the fourth transistor is connected to the second port of the third capacitor
- the first port of the second primary winding is connected to the first port of the third capacitor.
- the port is connected to the first port of the fourth capacitor, and the second port of the second primary winding is connected to the source of the fourth transistor and the second port of the third capacitor;
- the second port of the first primary circuit is connected to the first port of the second primary circuit, and the first port of the first primary circuit and the second port of the second primary circuit are connected to the input Voltage connection.
- the first port of the first primary circuit is connected to the first port of the first primary winding, and the second port of the first primary winding is connected to the source of the first transistor. And the drain of the second transistor, the first port of the second primary winding is connected to the second port of the first primary circuit and the first port of the second primary circuit, so The second port of the second primary winding is connected to the source of the third transistor and the drain of the fourth transistor.
- the secondary rectifier circuit includes a first rectifier diode, a second rectifier diode, a first inductor, and a fifth capacitor, wherein:
- the first port of the fifth capacitor is connected to one end of the first inductor, and the second port of the fifth capacitor is connected to the anode of the second rectifier diode and the anode of the first rectifier diode.
- the secondary winding includes a first port of the secondary winding, a second port of the secondary winding, and a third port of the secondary winding, wherein:
- the first port of the secondary winding is connected to the cathode of the second rectifier diode
- the second port of the secondary winding is connected to the other end of the first inductor
- the third port of the secondary winding is connected to the The cathode of the first rectifier diode is connected.
- the secondary side rectifier circuit includes: a third rectifier diode, a fourth rectifier diode, a second inductor, a third inductor, a sixth capacitor, a fourth port of the secondary winding, and a fifth port of the secondary winding. Port, where:
- the cathode of the third rectifier diode is connected to one end of the second inductor, the anode of the third rectifier diode is connected to the anode of the fourth rectifier diode, and the second port of the sixth capacitor is connected to the first
- the anode of the three rectifier diode is connected to the anode of the fourth rectifier diode, and one end of the third inductor is connected to the other end of the second inductor and the first port of the sixth capacitor;
- the fourth port of the secondary winding is connected to the cathode of the third rectifier diode and one end of the second inductor, and the fifth port of the secondary winding is connected to the cathode of the fourth rectifier diode and the first Connect the other end of the three inductors.
- the second aspect of the embodiments of the present invention provides a switching power supply, including the active clamp forward and flyback combined circuit of the integrated on-board charger disclosed in the first aspect of the embodiments of the present invention.
- the third aspect of the present invention provides a vehicle-mounted device, including the active clamp forward and flyback combined circuit of the integrated vehicle charger disclosed in the first aspect of the embodiments of the present invention or the switching power supply disclosed in the second aspect.
- the first primary circuit is connected in series with the second primary circuit, the first primary circuit is connected to the first primary winding, the second primary circuit is connected to the second primary winding, and the first primary winding is connected to the The second primary winding is connected in series; the secondary winding is connected to the secondary rectifier circuit.
- the first primary circuit generates a first electrical signal through a first input voltage
- the second primary circuit generates a second electrical signal through a second input voltage.
- the transformer converts the first electrical signal and the second electrical signal into a first magnetic flux and The second magnetic flux, where the direction of the first magnetic flux is the same as the direction of the second magnetic flux, the first magnetic flux and the second magnetic flux are superimposed to obtain the third magnetic flux, which is converted into induced electromotive force by the secondary winding, and the induced electromotive force is passed through the secondary rectifier circuit Convert into low voltage signal and output.
- the present invention consists of two active clamp forward and flyback combined circuits in series to form two working branches. The two active clamps The forward and flyback circuit carries the input voltage at the same time, and the voltage remains the same, thereby increasing the adaptation range of the circuit's input voltage.
- FIG. 1 is a schematic structural diagram of an active clamp forward and flyback combined circuit of an integrated on-board charger provided by an embodiment of the present invention
- FIG. 2 is a schematic diagram of the structure of the primary side circuit shown in FIG. 1;
- FIG. 3 is a schematic diagram of the structure of the secondary side rectifier circuit shown in FIG. 1;
- Fig. 4 is a schematic structural diagram of the transformer shown in Fig. 1;
- Fig. 5 is a schematic structural diagram of another secondary side rectifier circuit shown in Fig. 1;
- Fig. 6 is a schematic structural diagram of another transformer shown in Fig. 1;
- FIG. 7A is a schematic structural diagram of another active clamp forward and flyback combined circuit with integrated vehicle charger provided by an embodiment of the present invention.
- FIG. 7B is a current schematic diagram of the first stage of the working flow of the active clamp forward and flyback combined circuit of the integrated on-board charger shown in FIG. 7A in one cycle;
- FIG. 7C is a current schematic diagram of the second stage of the working flow of the active clamp forward and flyback combined circuit of the integrated on-board charger shown in FIG. 7A in one cycle;
- FIG. 7D is a current schematic diagram of the third stage of the working flow of the active clamp forward and flyback combined circuit of the integrated on-board charger shown in FIG. 7A in one cycle;
- FIG. 7E is a current schematic diagram of the fourth stage of the working flow of the active clamp forward and flyback combined circuit of the integrated on-board charger shown in FIG. 7A in one cycle;
- FIG. 8 is a schematic structural diagram of another active clamp forward and flyback combined circuit integrated with an on-board charger provided by an embodiment of the present invention.
- the maximum input voltage of the active clamp forward and flyback circuit is about 750V, which cannot meet the requirement of higher input voltage.
- the first primary circuit and the second primary circuit jointly carry the higher input voltage Therefore, the adaptation range of the input voltage of the circuit can be increased; in order to increase the adaptation range of the input voltage of the circuit, a feasible way is to use two active clamp forward and reverse circuits, two active clamp positive and negative
- the excitation circuits are respectively a first active clamp forward and flyback circuit and a second active clamp forward and flyback circuit.
- the first active clamp forward and flyback circuit includes a first primary circuit, a first primary winding and a secondary Side rectifier circuit
- the second active clamp forward and flyback circuit includes a second primary side circuit, a second primary side winding and a secondary side rectifier circuit
- the first primary side circuit and the second primary side circuit are connected in series, the first primary side circuit It carries the input high voltage together with the second primary circuit.
- the first primary circuit carries the first voltage
- the second primary circuit carries the second voltage.
- the first voltage generates the first electrical signal in the first primary circuit.
- the two voltages generate a second electrical signal in the second primary circuit, the first electrical signal generates a first magnetic flux in the first primary winding, and the second electrical signal generates a second magnetic flux in the second primary winding, the first magnetic flux
- the first induced electromotive force is generated through the secondary winding
- the second magnetic flux generates the second induced electromotive force through the secondary winding
- the third induced electromotive force superimposed by the first induced electromotive force and the second induced electromotive force generates a low voltage signal through the secondary winding and is output.
- FIG. 1 is a schematic structural diagram of an active clamp forward and flyback combined circuit with an integrated on-board charger provided by an embodiment of the present invention.
- the on-board active clamp forward and flyback combined circuit includes: The first primary circuit, the second primary circuit, the transformer and the secondary rectifier circuit, the transformer includes a first primary winding, a second primary winding, an iron core and a secondary winding.
- the first primary circuit is connected in series with the second primary circuit, the first primary circuit is connected to the first primary winding, the second primary circuit is connected to the second primary winding, the first primary winding and the second primary winding In series; the secondary winding is connected to the secondary rectifier circuit; the secondary winding includes: the first port of the secondary winding, the second port of the secondary winding and the third port of the secondary winding.
- the present invention consists of two active clamp forward and flyback combined circuits in series to form two working branches.
- the forward and flyback circuit carries the input voltage at the same time, and the voltage remains the same, thereby increasing the adaptation range of the circuit's input voltage.
- FIG. 2 is a schematic structural diagram of the primary side circuit shown in FIG. 1.
- the primary side circuit includes a first primary side circuit 110 and a second primary side circuit 120, wherein:
- the first primary circuit 110 includes a first capacitor C1, a second capacitor C2, a first transistor Q1, and a second transistor Q2.
- the first port of the first capacitor C1 is connected to the first port of the second capacitor C2, and the second capacitor C2
- the second port of the transistor Q1 is connected to the drain of the first transistor Q1, the source of the first transistor Q1 is connected to the drain of the second transistor Q2, and the source of the second transistor Q2 is connected to the second port of the first capacitor C1.
- the first port of a primary circuit is connected to the first port of the first capacitor C1 and the first port of the second capacitor C2, and the second port of the first primary circuit is connected to the source of the second transistor Q2 and the first capacitor.
- the second port is connected.
- the second primary circuit 120 includes a third capacitor C3, a fourth capacitor C4, a third transistor Q3, and a fourth transistor Q4.
- the first port of the third capacitor C3 is connected to the first port of the fourth capacitor C4, and the third capacitor C3
- the second port of the third transistor Q3 is connected to the drain of the third transistor Q3, the source of the third transistor Q3 is connected to the drain of the fourth transistor Q4, and the source of the fourth transistor Q4 is connected to the second port of the third capacitor C3.
- the first port of the second primary circuit 120 is connected to the first port of the third capacitor C3 and the first port of the fourth capacitor C4, and the second port of the second primary circuit 120 is connected to the source of the fourth transistor Q4 and the third
- the second port of the capacitor C3 is connected;
- the second port of the first primary circuit 110 is connected to the first port of the second primary circuit 120, and the first port of the first primary circuit 110 and the second port of the second primary circuit 120 are connected to the input voltage.
- the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 can all be NMOS transistors, which are not limited herein.
- Figure 3 is a schematic structural diagram of the secondary side rectifier circuit shown in Figure 1.
- the secondary side rectifier circuit includes a first rectifier diode D1, a second rectifier diode D2, a first inductor L1, and a fifth capacitor C5.
- the first port of the side rectifier circuit, the second port of the secondary side rectifier circuit, the third port of the secondary side rectifier circuit, the first port of the fifth capacitor C5 is connected to one end of the first inductor L1, and the fifth capacitor C5
- the two ports are connected to the anode of the second rectifier diode D2 and the anode of the first rectifier diode D1.
- FIG. 4 is a schematic structural diagram of the transformer shown in FIG. 1.
- the transformer includes a magnetic core, a first port i11 of a first primary winding, a second port i12 of the first primary winding, and a second original winding.
- Figure 5 is a schematic structural diagram of another secondary side rectifier circuit shown in Figure 1.
- the secondary side rectifier circuit includes a third rectifier diode D3, a fourth rectifier diode D4, a second inductor L2, and a third inductor.
- FIG. 6 is a schematic structural diagram of another transformer shown in FIG. 1.
- the transformer includes a magnetic core, a first port i11 of a first primary winding, a second port i12 of the first primary winding, and a second port i12 of the first primary winding.
- FIG. 7A is a schematic structural diagram of another active clamp forward and flyback combined type of an integrated on-board charger provided by an embodiment of the present invention.
- the circuit includes a primary circuit 100, a transformer 200, and a secondary rectifier circuit 300.
- the primary circuit 100 includes a first primary circuit 110 and a second primary circuit 120.
- the first port i11 of the first primary winding and the first primary The second port i12 of the winding, the first port i21 of the second primary winding and the second port i22 of the second primary winding, where:
- the first primary circuit 110 includes a first capacitor C1, a second capacitor C2, a first transistor Q1, and a second transistor Q2.
- the first port of the first capacitor C1 is connected to the first port of the second capacitor C2, and the second capacitor C2
- the second port of the transistor Q1 is connected to the drain of the first transistor Q1, the source of the first transistor Q1 is connected to the drain of the second transistor Q2, and the source of the second transistor Q2 is connected to the second port of the first capacitor C1.
- the first port of a primary circuit 110 is connected to the first port of the first capacitor C1 and the first port of the second capacitor C2.
- the second port of the first primary circuit 110 is connected to the source of the second transistor Q2 and the first port of the second capacitor C2.
- the second ports of the capacitors are all connected;
- the second primary circuit 120 includes a third capacitor C3, a fourth capacitor C4, a third transistor Q3, and a fourth transistor Q4.
- the first port of the third capacitor C3 is connected to the first port of the fourth capacitor C4, and the third capacitor C3
- the second port of the third transistor Q3 is connected to the drain of the third transistor Q3, the source of the third transistor Q3 is connected to the drain of the fourth transistor Q4, and the source of the fourth transistor Q4 is connected to the second port of the third capacitor C3.
- the first port of the second primary circuit 120 is connected to the first port of the third capacitor C3 and the first port of the fourth capacitor C4, and the second port of the second primary circuit 120 is connected to the source of the fourth transistor Q4 and the third The second port of the capacitor C3 is connected.
- the first transistor Q1 and the third transistor Q3 switch synchronously
- the second transistor Q2 and the fourth transistor Q4 switch synchronously
- the first transistor Q1 and the third transistor Q3 are turned on synchronously
- the second transistor Q2 and the fourth transistor Q4 are synchronously turned off.
- the direction of the first magnetic flux of the first electrical signal in the transformer is horizontal to the left, and the direction of the second magnetic flux of the second electrical signal in the transformer is horizontal to the left; in the second transistor Q2 and the fourth transistor Q4 is turned on synchronously, and when the first transistor Q1 and the third transistor Q3 are turned off synchronously, the direction of the first magnetic flux of the first electrical signal in the transformer is horizontal to the right, and the second electrical signal is in the direction of the second magnetic flux of the transformer.
- the direction is horizontal to the right.
- the second port of the first primary circuit 110 is connected to the first port of the second primary circuit 120, and the first port of the first primary circuit 110 and the second port of the second primary circuit 120 are connected to the input voltage;
- the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 can all be NMOS transistors, which are not limited herein.
- the first primary circuit 110 and the second primary circuit 120 jointly carry the input high voltage.
- the first primary circuit 110 generates a first electrical signal
- the second primary circuit 120 generates a second electrical signal.
- the first magnetic flux is generated in the first primary winding
- the second electrical signal generates the second magnetic flux in the second primary winding
- the first magnetic flux generates the first induced electromotive force through the secondary winding
- the second magnetic flux generates the first induced electromotive force through the secondary winding.
- Two induced electromotive forces, the third induced electromotive force superimposed on the first induced electromotive force and the second induced electromotive force generates a low voltage signal through the secondary rectifier circuit 300.
- the first port i11 of the first primary winding is connected to the first port of the first capacitor C1 and the first port of the second capacitor C2, and the second port i12 of the first primary winding is connected to the source of the second transistor.
- the second ports of the first capacitor C1 are all connected, the first port i21 of the second primary winding is connected to the first port of the third capacitor C3 and the first port C4 of the fourth capacitor, and the second port of the second primary winding
- the port i22 is connected to the source of the fourth transistor and the second port of the third capacitor C3.
- the secondary winding includes a first port, a second port, a third port, a first secondary winding and a second secondary winding, the first port of the secondary winding is connected to the first port of the secondary rectifier circuit 300, and the secondary The second port of the side winding is connected to the second port of the secondary rectifier circuit 300, the third port of the secondary winding is connected to the third port of the secondary rectifier circuit 300, and the first port of the secondary rectifier circuit 300 is connected to the second rectifier.
- the cathode of the diode D2 is connected, the second port of the secondary rectifier circuit 300 is connected to the other end of the first inductor L1, the third port of the secondary rectifier circuit 300 is connected to the cathode of the first rectifier diode D1, and the second terminal of the fifth capacitor C5 One port is connected to one end of the first inductor L1, and the second port of the fifth capacitor C5 is connected to the anode of the second rectifier diode D2 and the anode of the first rectifier diode D1.
- the secondary side rectifier circuit 300 includes a first rectifier diode D1, a second rectifier diode D2, a first inductor L1, and a fifth capacitor C5, a first port of the secondary side rectifier circuit 300, and a second port of the secondary side rectifier circuit 300 ,
- the third port of the secondary rectifier circuit 300 where the first port of the fifth capacitor C5 is connected to one end of the first inductor L1, the second port of the fifth capacitor C5 and the anode of the second rectifier diode D2 and the first rectifier diode
- the positive terminal of D1 is connected.
- the first primary winding, the second primary winding, the first secondary winding and the second secondary winding are wound on a magnetic core, and the windings are connected in series through the magnetic pole layer and the transformer compound mode.
- the first stage the first transistor Q1 and the third transistor Q3 are in the off state, and the second transistor Q2 and the fourth transistor Q4 are in the on state.
- FIG. 7B is the active clamp of the integrated on-board charger shown in FIG. 7A.
- FIG. 7B is the active clamp of the integrated on-board charger shown in FIG. 7A.
- the second stage the second transistor Q2 and the fourth transistor Q4 are in the off state at the same time, and the first transistor Q1 and the third transistor Q3 are in the on state.
- FIG. 7C is the active clamp of the integrated on-board charger shown in FIG. 7A.
- FIG. 7C is the active clamp of the integrated on-board charger shown in FIG. 7A.
- the currents of the first primary winding and the second primary winding charge the junction capacitance of the DS ports of the second transistor Q2 and the fourth transistor Q4, when the voltages of the second transistor Q2 and the fourth transistor Q4 are:
- the induced electromotive force of the first secondary winding and the second secondary winding are also reversed to positive and negative at the same time, and the second rectifier diode D2 is turned on , The first inductor L1 is discharged through the first secondary winding, the second rectifier diode D2 and the fifth capacitor C5, and the current decreases linearly.
- FIG. 7D is the active clamp positive of the integrated on-board charger shown in FIG. 7A.
- the currents of the windings and the second primary winding increase in the negative direction, and the induced electromotive force directions of the first primary winding, the second primary winding, the third secondary winding, and the fourth secondary winding are all positive and negative.
- the second rectifier diode D2 is turned on, the induced electromotive force of the first secondary winding and the inductor L1 together discharge the fifth capacitor C5, and the current decreases linearly.
- the fourth stage the first transistor Q1 and the third transistor Q3 are in the off state at the same time, and the second transistor Q2 and the fourth transistor Q4 are in the on state.
- FIG. 7E is the positive and negative active clamp of the integrated on-board charger shown in FIG. 7A.
- the junction capacitance of the DS port of the second transistor Q2 and the fourth transistor Q4 after the DS port voltage drops to 0 ampere, the second transistor Q2 and the internal diode of the fourth transistor Q4 flow into the first capacitor C1 and the third capacitor C3.
- the induced electromotive force of the first primary winding, the second primary winding, the first secondary winding and the second secondary winding are positive and negative, and the currents of the first primary winding and the second primary winding
- the magnitude shows a downward trend, the first rectifier diode D1 is turned on, the induced electromotive force of the first inductor L1 is positive and negative, and the induced electromotive force of the second secondary winding charges the first inductor L1 and the fifth capacitor C5.
- FIG. 8 is a schematic structural diagram of another active clamp forward and flyback combined circuit of an integrated on-board charger provided by an embodiment of the present invention.
- the circuit includes a primary circuit 100, a transformer 400 and a secondary rectifier circuit 500.
- the primary circuit 100 includes a first primary circuit 110 and a second primary circuit 120.
- the first port i11 of the first primary winding and the first primary The second port i12 of the side winding, the first port i21 of the second primary winding and the second port i22 of the second primary winding, where:
- the first primary circuit 110 includes a first capacitor C1, a second capacitor C2, a first transistor Q1, and a second transistor Q2.
- the first port of the first capacitor C1 is connected to the first port of the second capacitor C2, and the second capacitor C2
- the second port of the transistor Q1 is connected to the drain of the first transistor Q1, the source of the first transistor Q1 is connected to the drain of the second transistor Q2, and the source of the second transistor Q2 is connected to the second port of the first capacitor C1.
- the first port of a primary circuit is connected to the first port of the first capacitor C1 and the first port of the second capacitor C2, and the second port of the first primary circuit is connected to the source of the second transistor Q2 and the first capacitor. Second port connection;
- the second primary circuit 120 includes a third capacitor C3, a fourth capacitor C4, a third transistor Q3, and a fourth transistor Q4.
- the first port of the third capacitor C3 is connected to the first port of the fourth capacitor C4, and the third capacitor C3
- the second port of the third transistor Q3 is connected to the drain of the third transistor Q3, the source of the third transistor Q3 is connected to the drain of the fourth transistor Q4, and the source of the fourth transistor Q4 is connected to the second port of the third capacitor C3.
- the first port of the second primary circuit 120 is connected to the first port of the third capacitor C3 and the first port of the fourth capacitor C4, the second port of the second primary circuit 120 is connected to the source of the fourth transistor Q4 and the third The second port of the capacitor C3 is connected.
- the first transistor Q1 and the third transistor Q3 switch synchronously
- the second transistor Q2 and the fourth transistor Q4 switch synchronously
- the first transistor Q1 and the third transistor Q3 are turned on synchronously
- the second transistor Q2 and the fourth transistor Q4 are synchronously turned off.
- the direction of the first magnetic flux of the first electrical signal in the transformer is horizontal to the left, and the direction of the second magnetic flux of the second electrical signal in the transformer is horizontal to the left; in the second transistor Q2 and the fourth transistor Q4 is turned on synchronously, and when the first transistor Q1 and the third transistor Q3 are turned off synchronously, the direction of the first magnetic flux of the first electrical signal in the transformer is horizontal to the right, and the second electrical signal is in the direction of the second magnetic flux of the transformer.
- the direction is horizontal to the right.
- the second port of the first primary circuit 110 is connected to the first port of the second primary circuit 120, and the first port of the first primary circuit 110 and the second port of the second primary circuit 120 are connected to the input voltage.
- the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 can all be NMOS transistors, which are not limited herein.
- the first primary circuit 110 and the second primary circuit 120 jointly carry the input high voltage.
- the first primary circuit 110 generates a first electrical signal
- the second primary circuit 120 generates a second electrical signal.
- the first magnetic flux is generated in the first primary winding
- the second electrical signal generates the second magnetic flux in the second primary winding.
- the first magnetic flux passes through the secondary winding of the first primary winding to generate the first induced electromotive force
- the second magnetic flux The second induced electromotive force is generated by the secondary winding of the second primary winding, and the third induced electromotive force superimposed by the first induced electromotive force and the second induced electromotive force is passed through the secondary rectifier circuit 300 to generate a low voltage signal.
- the first port i11 of the first primary winding is connected to the first port of the first capacitor C1 and the first port of the second capacitor C2, and the second port i12 of the first primary winding is connected to the source of the second transistor and The first port of the first capacitor C1 is connected, the second port i22 of the second primary winding is connected to the first port of the third capacitor C3 and the first port of the fourth capacitor C4, and the fourth port of the second primary winding is connected to The source of the fourth transistor and the second port of the third capacitor C3 are connected.
- the fourth port of the secondary winding is connected to the fourth port of the secondary rectifier circuit
- the fifth port of the secondary winding is connected to the fifth port of the secondary rectifier circuit
- the fourth port of the secondary winding is connected to the third rectifier diode
- the cathode of D3 is connected to the other end of the second inductor L2
- the fifth port of the secondary winding is connected to the cathode of the fourth rectifier diode D4 and the other end of the third inductor L3.
- the secondary rectifier circuit includes a third rectifier diode D3, a fourth rectifier diode D4, a second inductor L2, a third inductor L3, and a sixth capacitor C6.
- the first primary winding, the second primary winding and the secondary winding are wound on a magnetic core, and the windings are connected in series through the magnetic pole layer and the transformer compound mode.
- the present invention consists of two active clamp forward and flyback combined circuits in series to form two working branches.
- the forward and flyback circuit carries the input voltage at the same time, and the voltage remains the same, thereby increasing the adaptation range of the circuit's input voltage.
- an embodiment of the present invention provides a switching power supply, and the switching power supply includes an active clamp forward and flyback combined circuit of an integrated on-board charger provided by any of the foregoing invention embodiments.
- the active clamp forward and flyback combined circuit of the integrated on-board charger in the switching power supply is the same as the active clamp forward and flyback combined circuit of the integrated on-board charger described in any of the above embodiments of the invention. No longer describe.
- an embodiment of the present invention provides an in-vehicle device.
- the in-vehicle device includes the active clamp forward and flyback combined circuit of an integrated on-board charger provided by any of the foregoing invention embodiments or the combination circuit provided by the foregoing invention embodiments. Switching power supply.
- the active clamp forward and flyback combined circuit of the integrated on-board charger in the on-board equipment is the same as the active clamp forward and flyback combined circuit of the integrated on-board charger described in any of the above embodiments of the invention. No longer describe.
- the rectifier diode in the secondary side rectifier circuit in the embodiment of the present invention may also be a MOSFET transistor.
- MOSFET transistor MOSFET transistor
- the disclosed device may be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the above-mentioned units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.
- the units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims (10)
- 一种集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述电路包括:第一原边电路、第二原边电路、变压器和副边整流电路,所述变压器包括第一原边绕组、第二原边绕组、铁芯和副边绕组,其中:所述第一原边电路与所述第二原边电路串联,所述第一原边电路连接所述第一原边绕组,所述第二原边电路连接所述第二原边绕组,所述第一原边绕组与所述第二原边绕组串联;所述副边绕组连接所述副边整流电路;所述第一原边电路和所述第二原边电路基于输入的高电压信号分别产生第一电压信号和第二电压信号,所述第一电压信号和所述第二电压信号在所述变压器中分别转换为第一磁通量和第二磁通量,所述第一磁通量的方向与所述第二磁通量的方向相同,所述第一磁通量和所述第二磁通量叠加的第三磁通量转换为感应电动势,所述感应电动势在所述副边绕组中转换为低电压信号并输出。
- 根据权利要求1所述集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述第一原边电路包括第一电容、第二电容、第一晶体管和第二晶体管,其中:所述第一电容的第一端口与所述第二电容的第一端口连接,所述第二电容的第二端口与所述第一晶体管的漏极连接,所述第一晶体管的源极与所述第二晶体管的漏极连接,所述第二晶体管的源极与所述第一电容的第二端口连接,所述第一原边绕组的第一端口与所述第一电容的第一端口以及所述第二电容的第一端口连接,所述第一原边绕组的第二端口与所述第二晶体管的源极以及所述第一电容的第二端口连接。
- 根据权利要求2所述集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述第二原边电路包括第三电容、第四电容、第三晶体管和第四晶体管,其中:所述第三电容的第一端口与所述第四电容的第一端口连接,所述第三电容 的第二端口与所述第三晶体管的漏极连接,所述第三晶体管的源极与所述第四晶体管的漏极连接,所述第四晶体管的源极与所述第三电容的第二端口连接,所述第二原边绕组的第一端口与所述第三电容的第一端口以及所述第四电容的第一端口连接,所述第二原边绕组的第二端口与所述第四晶体管的源极以及所述第三电容的第二端口连接;所述第一原边电路的第二端口与所述第二原边电路的第一端口连接,所述第一原边电路的第一端口以及所述第二原边电路的第二端口与输入电压连接。
- 根据权利要求1至3任一项所述的集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述第一原边电路的第一端口与所述第一原边绕组的第一端口连接,所述第一原边绕组的第二端口与所述第一晶体管的源极以及所述第二晶体管的漏极连接,所述第二原边绕组的第一端口与所述第一原边电路的第二端口以及所述第二原边电路的第一端口连接,所述第二原边绕组的第二端口与所述第三晶体管的源极以及所述第四晶体管的漏极连接。
- 根据权利要求4所述的集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述副边整流电路包括第一整流二极管、第二整流二极管、第一电感和第五电容,其中:所述第五电容的第一端口与所述第一电感的一端连接,所述第五电容的第二端口与所述第二整流二极管的正极以及所述第一整流二极管的正极连接。
- 根据权利要求5所述的集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述副边绕组包括副边绕组的第一端口、副边绕组的第二端口和副边绕组的第三端口,其中:所述副边绕组的第一端口与所述第二整流二极管的负极连接,所述副边绕组的第二端口与所述第一电感的另一端连接,所述副边绕组的第三端口与所述第一整流二极管的负极连接。
- 根据权利要求4所述的集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述副边整流电路包括:第三整流二极管、第四整流二极管、第二电感、第三电感、第六电容、副边绕组的第四端口和副边绕组的第五端口,其中:所述第三整流二极管的负极与所述第二电感的一端连接,所述第三整流二极管的正极与所述第四整流二极管的正极连接,所述第六电容的第二端口与所述第三整流二极管的正极以及所述第四整流二极管的正极连接,所述第三电感的一端与所述第二电感的另一端以及所述第六电容的第一端口连接;所述副边绕组的第四端口与所述第三整流二极管的负极以及所述第二电感的一端连接,所述副边绕组的第五端口与所述第四整流二极管的负极以及所述第三电感的另一端连接。
- 根据权利要求1-3任一项所述的集成车载充电机的有源箝位正反激组合式电路,其特征在于,所述第一原边绕组、所述第二原边绕组和所述副边绕组绕制在一个磁芯上。
- 一种开关电源,其特征在于,所述开关电源包括如权利要求1-8任一项所述的集成车载充电机的有源箝位正反激组合式电路。
- 一种车载设备,其特征在于,所述车载设备包括如权利要求1-8任一项所述的集成车载充电机的有源箝位正反激组合式电路或者如权利要求9所述的开关电源。
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WO2001057999A1 (en) * | 2000-02-04 | 2001-08-09 | Koninklijke Philips Electronics N.V. | Dc/dc conversion circuit |
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WO2001057999A1 (en) * | 2000-02-04 | 2001-08-09 | Koninklijke Philips Electronics N.V. | Dc/dc conversion circuit |
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