WO2020215279A1 - Circuit de commande de protection contre les surtensions et dispositif associé - Google Patents

Circuit de commande de protection contre les surtensions et dispositif associé Download PDF

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Publication number
WO2020215279A1
WO2020215279A1 PCT/CN2019/084320 CN2019084320W WO2020215279A1 WO 2020215279 A1 WO2020215279 A1 WO 2020215279A1 CN 2019084320 W CN2019084320 W CN 2019084320W WO 2020215279 A1 WO2020215279 A1 WO 2020215279A1
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WO
WIPO (PCT)
Prior art keywords
winding
capacitor
circuit
transistor
secondary winding
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Application number
PCT/CN2019/084320
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English (en)
Chinese (zh)
Inventor
罗乐
赵德琦
吴壬华
Original Assignee
深圳欣锐科技股份有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 深圳欣锐科技股份有限公司 filed Critical 深圳欣锐科技股份有限公司
Priority to CN201980005018.1A priority Critical patent/CN111316545A/zh
Priority to PCT/CN2019/084320 priority patent/WO2020215279A1/fr
Publication of WO2020215279A1 publication Critical patent/WO2020215279A1/fr

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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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for 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
    • H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • 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
    • H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation

Definitions

  • This application relates to the field of switching power supplies, in particular to an overvoltage protection control circuit and related equipment.
  • the circuits in some switching power supplies are active clamp forward and flyback circuits, but if the active clamp forward and flyback circuits are working, if the external high voltage input exceeds the specifications or other abnormalities cause the voltage on the main switch to exceed specifications, It is easy to make the entire circuit unable to work normally, resulting in no output of the entire circuit, and even a short circuit at the input terminal, causing large-scale damage to the circuit, and ultimately causing the vehicle to catch fire or lose power on the road and cause a car accident.
  • This application provides an overvoltage protection control circuit and related equipment, which are used to monitor and control the overvoltage condition of the main switch tube of the active clamp forward and flyback circuit, improve the reliability of the switching power supply circuit, and improve the safety of the switching power supply circuit Sex.
  • the first aspect of the present application provides an overvoltage protection control circuit.
  • the circuit includes a detection circuit, an input circuit, a transformer, and an output circuit.
  • the transformer includes a primary winding, a first secondary winding, and a second secondary winding.
  • Side winding and iron core, the output circuit includes a first winding output circuit and a second winding output circuit;
  • the first secondary winding is connected to the first winding output circuit
  • the second secondary winding is connected to the second winding output circuit
  • the primary winding is connected to the input circuit
  • the first The winding output circuit is connected in parallel with the second winding output circuit.
  • the input circuit includes: a first transistor, a second transistor, a first capacitor, and a first diode; and an external input high voltage
  • the power supply is connected to one end of the first capacitor and one end of the primary winding, the other end of the first capacitor is connected to the drain of the first transistor, and the source of the first transistor is connected to the first transistor.
  • the drains of the two transistors are connected to the other end of the primary winding, and the source of the second transistor is grounded; the first diode is connected in parallel with the first transistor, wherein the first diode The anode of the first diode is connected to the source of the first transistor, and the cathode of the first diode is connected to the drain of the first transistor.
  • the detection circuit includes: a control device, a first resistor, a second resistor, a third resistor, an optocoupler, a second capacitor, and a controllable precision voltage regulator source; One end is connected to an external input power source, the other end of the third resistor is connected to the positive electrode of the optocoupler, the negative electrode of the optocoupler is connected to the cathode of the controllable precision voltage regulator, and the controllable precision voltage regulator The anode of the source is grounded, the reference electrode of the controllable precision stabilized voltage source is connected to one end of the second capacitor, one end of the first resistor, and one end of the second resistor, and the other end of the second capacitor It is connected to the other end of the second resistor and then grounded.
  • the first winding output circuit includes: a second diode and a third capacitor; the cathode of the second diode is connected to one end of the first secondary winding, so The anode of the second diode is connected to one end of the third capacitor, the other end of the third capacitor is connected to the second output port, and one end of the third capacitor is connected to the other end of the first secondary winding. One end is connected, and the other end of the third capacitor is connected to the first output port.
  • the second winding output circuit includes: a third diode and a third capacitor; the cathode of the third diode is connected to the other end of the second secondary winding, The anode of the third diode is connected to one end of the third capacitor, one end of the third capacitor is connected to the second output port, and the other end of the third capacitor is connected to the second secondary side. One end of the winding is connected, and the other end of the third capacitor is connected to the first output port.
  • the parallel connection of the first winding output circuit and the second winding output circuit includes: connecting the other end of the first secondary winding to one end of the first secondary winding.
  • the primary winding, the first secondary winding and the second secondary winding are wound on the iron core.
  • the first transistor and the second transistor are both insulated gate field effect transistors.
  • a second aspect of the present application provides a switching power supply device, characterized in that the switching power supply device includes the overvoltage protection control circuit as described in the first aspect.
  • a third aspect of the present application provides an in-vehicle device, which is characterized in that the in-vehicle device includes the switching power supply device as described in the second aspect.
  • the overvoltage protection control circuit by adding a detection circuit, the first resistor and the second resistor reduce the voltage on the first capacitor to a certain value and then transmit it as a detection signal to the detection circuit for monitoring. Filtering ensures that the detection signal is not interfered by noise and improves the detection accuracy of the detection circuit.
  • the detection circuit detects the detection signal and executes the detection action, drives the optocoupler, and the optocoupler transmits the overvoltage signal to the control device for processing, and the control device receives the overvoltage signal Then close the input and output circuit or limit the input and output circuit, realize the overvoltage protection control of the circuit, improve the safety of the circuit, improve the reliability of the circuit, and improve the customer experience.
  • FIG. 1 is a schematic diagram of a circuit structure of an overvoltage protection control circuit provided by an embodiment of the present application
  • 1A is a schematic diagram of a first state of an overvoltage protection control circuit provided by an embodiment of the present application
  • FIG. 1B is a schematic diagram of a second state of an overvoltage protection control circuit provided by an embodiment of the present application.
  • 1C is a schematic diagram of a third state of an overvoltage protection control circuit provided by an embodiment of the present application.
  • FIG. 2 is a circuit block diagram of an overvoltage protection control circuit provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an input circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a detection circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a first winding output circuit of an overvoltage protection control circuit provided by an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a second winding output circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the overvoltage protection control circuit monitors the voltage of the input circuit through the detection circuit to ensure that the voltage of the input circuit is stable, thereby improving the safety and reliability of the entire circuit.
  • FIG. 1 is a schematic diagram of a circuit structure of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the overvoltage protection control circuit includes a detection circuit 101, an input circuit 102, a transformer 103 and an output circuit 104.
  • the detection circuit 101 includes a control device U3, a first resistor R1, a second resistor R2, a third resistor R3, an optocoupler U2, a second capacitor C2, and a controllable precision voltage regulator source U1, wherein the third resistor R3 One end of the third resistor R3 is connected to the first input port A, the other end of the third resistor R3 is connected to the positive electrode of the optocoupler U2, and the negative electrode of the optocoupler U2 is connected to the cathode of the controllable precision voltage regulator source U1.
  • the anode is grounded, the reference electrode of the controllable precision voltage stabilizing source U1 is connected to one end of the second capacitor C2, one end of the first resistor R1, and one end of the second resistor R2.
  • the other end of the second capacitor C2 is connected to the other end of the second resistor R2.
  • One end is connected, the other end of the second resistor R2 is grounded, and the first input port A is connected to an external input power source.
  • the input circuit 102 includes a first transistor Q1, a second transistor Q2, a first capacitor C1, and a first diode D1; one end of the first capacitor C1 is connected to the second input port D, and the other of the first capacitor C1 One end is connected to the drain of the first transistor Q1 and the cathode of the first diode D1.
  • the source of the first transistor Q1 is connected to the drain of the second transistor Q2 and the anode of the first diode D1.
  • the anode of the tube D1 is also connected to the drain of the second transistor Q2, the source of the second transistor Q2 is grounded, one end of the first capacitor C1 is connected to one end of the primary winding, and the drain of the second transistor Q2 is connected to the primary winding.
  • the other end is connected, where the second input port D is connected to an external input high-voltage power supply.
  • the output circuit 104 includes: a first winding output circuit and a second winding output circuit, where the first winding output circuit includes: a second diode D2 and a third capacitor C3; the cathode of the second diode D2 Connected to one end of the first secondary winding, the anode of the second diode D2 is connected to one end of the third capacitor C3, the other end of the third capacitor C3 is connected to the second output port F, the other end of the first secondary winding, and The first output port E is connected.
  • the second winding output circuit includes: a third diode D3 and a third capacitor C3; the cathode of the third diode D3 is connected to the other end of the second secondary winding, and the anode of the third diode D3 It is connected to one end of the third capacitor C3, one end of the third capacitor C3 is connected to the second output port F, and the other end of the third capacitor C3 is connected to the other end of the second secondary winding and the first output port E.
  • the first winding output circuit is connected in parallel with the second winding output circuit, and the other end of the first secondary winding is connected to one end of the second secondary winding.
  • the transformer 103 includes: a primary winding, an iron core, a first secondary winding, and a second secondary winding, wherein the primary winding, the first secondary winding, and the second secondary winding are wound on the same iron core on.
  • the first transistor Q1 and the second transistor Q2 are insulated gate field effect transistors.
  • the working process of the overvoltage protection control circuit provided in the embodiment of the application includes four states in one cycle, which are specifically as follows:
  • the first state is shown in Figure 1A.
  • the first transistor Q1 When the first transistor Q1 is turned off and the second transistor Q2 is turned on: the current is input from the external high-voltage power source and flows to the primary winding of the transformer, and the current enters the grounding point through the second transistor Q2.
  • a current loop the voltage polarity on the primary winding is up positive and down negative.
  • the first secondary winding induces a positive and down negative voltage, and the current flows from the cathode of the second diode to the anode.
  • the second diode When the second diode is reverse biased and does not conduct, it cannot form a current loop.
  • the second secondary winding induces a positive and negative voltage at the top and bottom, and the current flows from the anode of the third diode to the cathode.
  • the current flows from the upper end of the second secondary winding through the third capacitor C3 and then through the third diode back to the lower end of the second secondary winding to form a current loop.
  • the second state is shown in Figure 1B.
  • the first transistor Q1 and the second transistor Q2 are both turned off, due to the inductance characteristics, the current direction of the primary winding remains unchanged, and the primary winding generates a reflected voltage, and the polarity of the reflected voltage is down Positive and negative, the reflected voltage makes the current flow from the lower end of the primary winding through the first diode D1, and then back to the primary winding after passing through the first capacitor C1, forming a current loop to charge the first capacitor C1, the first capacitor
  • the voltage on C1 is positive and negative at the bottom.
  • the voltage direction and current direction of the secondary winding remain unchanged.
  • the voltage of the first secondary winding is positive and negative at the bottom.
  • the second diode D2 is reverse biased and does not conduct. A current loop cannot be formed.
  • the voltage of the second secondary winding is positive and negative. The current flows from the upper end of the second secondary winding through the third capacitor C3, and then through the third diode D3 back to the lower end of the second secondary winding , Forming a loop.
  • the third state is shown in Figure 1C.
  • the first transistor Q1 When the first transistor Q1 is turned on and the second transistor Q2 is turned off, the voltage of the first capacitor C1 after being charged is positive and negative, and the current flows from the lower end of the first capacitor C1 through the first capacitor.
  • the transistor Q1 passes through the primary winding to the upper end of the first capacitor C1 to form a current loop.
  • the energy generated by the discharge of the first capacitor C1 is induced to the secondary winding, and the first secondary winding induces positive and negative
  • the voltage and current flow from the lower end of the first secondary winding pass through the third capacitor C3, and then return to the upper end of the first secondary winding through the second diode D2, forming a current loop, and the second secondary winding induces the lower positive
  • the third diode D3 is reversely biased and does not conduct, and a current loop cannot be formed.
  • the circuit state is updated to the first state, and the circuit operation process from the first state to the third state is repeated.
  • FIG. 2 is a circuit block diagram of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the overvoltage protection control circuit includes a detection circuit 101, an input circuit 102, a transformer 103, and an output circuit 104.
  • the transformer 103 includes: a primary winding 105, a magnetic core, a first secondary winding 106, and a second secondary winding 107.
  • the output circuit 104 includes: a first winding output circuit 108 and a second winding output circuit 109;
  • the output circuit 104 is connected to the transformer 103, the input circuit 102 is connected to the transformer 103, and the first winding output circuit 108 is connected in parallel to the second winding output circuit 109, wherein the input circuit 102 is connected to the primary winding 105, The winding output circuit 108 is connected to the first secondary winding 106, and the second winding output circuit 109 is connected to the second secondary winding 107.
  • the input circuit 104 is used to generate a first electrical signal according to the input voltage through the input circuit 104; the primary winding 105 is used to convert the first electrical signal into a first magnetic flux; the first secondary side
  • the winding 106 is used to receive the first magnetic flux and generate a second magnetic flux according to the first magnetic flux, and at the same time, the second magnetic flux generates a first induced electromotive force on the secondary side through the first secondary winding 106;
  • the second secondary winding 107 is used to receive the first magnetic flux and generate a third magnetic flux according to the first magnetic flux, and meanwhile, the third magnetic flux generates a secondary induced electromotive force through the second secondary winding 107;
  • the circuit 108 is used to convert the first induced electromotive force of the secondary side into a voltage signal and output;
  • the second winding output circuit 109 is used to convert the second induced electromotive force of the secondary side into a voltage signal and output.
  • FIG. 3 is a schematic structural diagram of an input circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the input circuit includes a first transistor Q1, a second transistor Q2, a first capacitor C1, and a first diode D1; one end of the first capacitor C1 is connected to the second input port D, and the other end of the first capacitor C1 Connected to the drain of the first transistor Q1, the other end of the first capacitor C1 is connected to the cathode of the first diode D1, the source of the first transistor Q1 is connected to the drain of the second transistor Q2, and the The source is connected to the anode of the first diode D1, the anode of the first diode D1 is connected to the drain of the second transistor Q2, the source of the second transistor Q2 is grounded, and one end of the first capacitor C1 is connected to the primary winding
  • the drain of the second transistor Q2 is connected to the other end of the primary winding, and the second input port D is connected to the external input high-voltage power supply.
  • FIG. 4 is a schematic structural diagram of a detection circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the detection circuit includes a control device U3, a first resistor R1, a second resistor R2, a third resistor R3, an optocoupler U2, a second capacitor C2, and a controllable precision voltage stabilizer source U1, wherein the third resistor R3 One end is connected to the first input port A, the other end of the third resistor R3 is connected to the positive electrode of the optocoupler U2, the negative electrode of the optocoupler U2 is connected to the cathode of the controllable precision voltage regulator source U1, and the anode of the controllable precision voltage regulator source U1 Grounded, the reference electrode of the controllable precision voltage stabilization source U1 is connected to one end of the second capacitor C2, the reference electrode of the controllable precision voltage stabilization source U1 is connected to one end of the first resistor R1, and the reference electrode of the controllable precision voltage stabilization source U1 It is connected to one end of the second resistor R2, the other end of the second capacitor C2 is connected to the other end of the second resistor R3,
  • the first transistor Q1 and the second transistor Q2 are turned on in turn.
  • the current is transferred to the first secondary winding and the second secondary winding through the primary winding, and the current is rectified and filtered.
  • the second transistor Q2 is disconnected, the reflected high voltage generated by the primary winding charges the first capacitor C1 through the first diode D1, and the primary winding generates The reflected high voltage is suppressed to a certain value to ensure that the reflected high voltage does not exceed the voltage value of the second transistor Q2.
  • the first transistor Q1 When the first capacitor C1 is charged, the first transistor Q1 is turned on, and the current of the first capacitor C1 passes through the first The transistor Q1 is transferred to the primary winding, and the current is transferred to the first secondary winding and the second secondary winding through the primary winding;
  • the detection circuit is used to ensure that the value of the reflected high voltage does not exceed the voltage value borne by the second transistor Q2, wherein the first resistor R1 and the second resistor R2 reduce the voltage of the first capacitor C1 to a certain value and send it as a detection signal
  • the second capacitor C2 filters the clutter contained in the detection signal.
  • the first resistor R1 and the second resistor R2 jointly determine the voltage threshold. For example, the voltage on the first capacitor C1 is higher than the preset The voltage is reduced by the first resistor R1 and the second resistor R2, and then filtered by the second capacitor C1 to obtain the detection signal.
  • the detection signal is sent to the controllable precision voltage regulator source U1, and the controllable precision voltage regulator source U1 receives the detection After the signal, the optocoupler U2 is driven, and the second transistor Q2 overvoltage signal is output to the control circuit U3 through the optocoupler U2.
  • the control circuit U3 receives the second transistor Q2 overvoltage signal and executes actions to close the input circuit, transformer, and output circuit or limit The power output of the input circuit, transformer, and input circuit, where the control circuit includes but is not limited to: a single-chip microcomputer or a digital signal processing chip.
  • FIG. 5 is a schematic structural diagram of a first winding output circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the first winding output circuit includes: a second diode D2 and a third capacitor C3; the cathode of the second diode D2 is connected to one end of the first secondary winding, and the anode of the second diode D2 is connected to One end of the third capacitor C3 is connected, the other end of the third capacitor C3 is connected to the second output port F, the other end of the third capacitor C3 is connected to the other end of the first secondary winding, and the other end of the third capacitor C3 is connected to the second output port F.
  • An output port E is connected.
  • FIG. 6 is a schematic structural diagram of a second winding output circuit of an overvoltage protection control circuit provided by an embodiment of the present application.
  • the second winding output circuit includes: a third diode D3 and a third capacitor C3; the cathode of the third diode D3 is connected to the other end of the second secondary winding, and the anode of the third diode D3 It is connected to one end of the third capacitor C3, one end of the third capacitor C3 is connected to the second output port F, the other end of the third capacitor C3 is connected to the other end of the second secondary winding, and the other end of the third capacitor C3 is connected to the second output port F.
  • An output port E is connected.
  • An embodiment of the application also provides a switching power supply device, including the above-mentioned overvoltage protection control circuit.
  • An embodiment of the present application also provides an in-vehicle device, including the above-mentioned switching power supply device.
  • 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.
  • each unit in each embodiment of the present application 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

La présente invention concerne un circuit de commande de protection contre les surtensions, caractérisé en ce que le circuit de protection contre les surtensions comprend un circuit de détection, un circuit d'entrée, un transformateur et un circuit de sortie. Le transformateur comprend un enroulement primaire, un premier enroulement secondaire, un deuxième enroulement secondaire et un noyau en fer. Le circuit de sortie comprend un circuit de sortie de premier enroulement et un circuit de sortie de deuxième enroulement. Le premier enroulement secondaire est connecté au circuit de sortie de premier enroulement, le deuxième enroulement secondaire est connecté au circuit de sortie de deuxième enroulement, l'enroulement primaire est connecté au circuit d'entrée et le circuit de sortie de premier enroulement et le circuit de sortie de deuxième enroulement sont branchés en parallèle. Le circuit de commande de protection contre les surtensions selon la présente invention présente les avantages d'améliorer la sécurité et la fiabilité d'un circuit.
PCT/CN2019/084320 2019-04-25 2019-04-25 Circuit de commande de protection contre les surtensions et dispositif associé WO2020215279A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980005018.1A CN111316545A (zh) 2019-04-25 2019-04-25 过压保护控制电路及相关设备
PCT/CN2019/084320 WO2020215279A1 (fr) 2019-04-25 2019-04-25 Circuit de commande de protection contre les surtensions et dispositif associé

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Application Number Priority Date Filing Date Title
PCT/CN2019/084320 WO2020215279A1 (fr) 2019-04-25 2019-04-25 Circuit de commande de protection contre les surtensions et dispositif associé

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WO2020215279A1 true WO2020215279A1 (fr) 2020-10-29

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090081587A (ko) * 2008-01-24 2009-07-29 엘지이노텍 주식회사 과전압 보호회로
CN105262185A (zh) * 2015-11-25 2016-01-20 帝发技术(无锡)有限公司 车用充电器
CN206742925U (zh) * 2016-12-07 2017-12-12 安科机器人有限公司 一种电池充电系统及其输出过压保护电路
CN207117173U (zh) * 2017-08-18 2018-03-16 广州视源电子科技股份有限公司 一种过压保护电路与开关电源电路

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101404454A (zh) * 2008-11-24 2009-04-08 北京新雷能有限责任公司 集成磁元件的有源钳位正反激变换器
US10148188B2 (en) * 2016-09-06 2018-12-04 Fairchild Semiconductor Corporation Clamp voltage detection and over-voltage protection for power supply topologies
CN109088399A (zh) * 2018-09-07 2018-12-25 广州金升阳科技有限公司 一种输出过压保护电路及其控制方法
CN210016272U (zh) * 2019-04-25 2020-02-04 深圳欣锐科技股份有限公司 过压保护控制电路、开关电源装置及车载设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090081587A (ko) * 2008-01-24 2009-07-29 엘지이노텍 주식회사 과전압 보호회로
CN105262185A (zh) * 2015-11-25 2016-01-20 帝发技术(无锡)有限公司 车用充电器
CN206742925U (zh) * 2016-12-07 2017-12-12 安科机器人有限公司 一种电池充电系统及其输出过压保护电路
CN207117173U (zh) * 2017-08-18 2018-03-16 广州视源电子科技股份有限公司 一种过压保护电路与开关电源电路

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