阅读说明：本技术 集成车载充电机的开关电源电路及转换器 (Switch power supply circuit and converter of integrated vehicle-mounted charger ) 是由 陈丽君 赵德琦 吴壬华 于 2019-07-08 设计创作，主要内容包括：本申请公开了一种集成车载充电机的电源电路及转换器,该电路包括输入电路、变压器、副边电路,输入电路包括第一绕组输入电路和第二绕组输入电路,变压器包括原边第一绕组、原边第二绕组、副边绕组和铁芯,第一绕组输入电路与原边第一绕组连接,第二绕组输入电路与原边第二绕组连接,副边绕组与副边电路连接,第一绕组输入电路与第二绕组输入电路串联连接,高电压信号通过第一绕组输入电路和第二绕组输入电路产生第一电信号和第二电信号,第一电信号和第二电信号通过原边第一绕组、原边第二绕组产生第一磁通量和第二磁通量,第一磁通量和第二磁通量叠加产生第三磁通量通过副边绕组产生低电压信号。本申请可提高电路的输入电压的适配范围。(The application discloses a power circuit and a converter of an integrated vehicle-mounted charger, the circuit comprises an input circuit, a transformer and a secondary side circuit, the input circuit comprises a first winding input circuit and a second winding input circuit, the transformer comprises a primary side first winding, the high-voltage magnetic-field-effect transformer comprises a primary side second winding, a secondary side winding and an iron core, wherein a first winding input circuit is connected with the primary side first winding, a second winding input circuit is connected with the primary side second winding, the secondary side winding is connected with the secondary side circuit, the first winding input circuit is connected with a second winding input circuit in series, a high-voltage signal generates a first electric signal and a second electric signal through the first winding input circuit and the second winding input circuit, the first electric signal and the second electric signal generate a first magnetic flux and a second magnetic flux through the primary side first winding and the primary side second winding, and the first magnetic flux and the second magnetic flux are superposed to generate a third magnetic flux which generates a low-voltage signal through the secondary side winding. The application can improve the adaptation range of the input voltage of the circuit.)

1. The power circuit of the integrated vehicle-mounted charger is characterized by comprising the following components: the transformer comprises a primary side first winding, a primary side second winding, a secondary side winding and an iron core, wherein the input circuit comprises a first winding input circuit and a second winding input circuit;

the primary side first winding is connected with the first winding input circuit, the primary side second winding is connected with the second winding input circuit, the secondary side winding is connected with the secondary side circuit, and the first winding input circuit is connected with the second winding input circuit in series.

2. The power circuit of the integrated vehicle-mounted charger according to claim 1, wherein the first winding input circuit comprises a first capacitor, a second capacitor, a first switching tube and a second switching tube;

the first port of the first capacitor is connected with the first port of the second capacitor, the second port of the second capacitor is connected with the drain electrode of the first switch tube, the source electrode of the first switch tube is connected with the drain electrode of the second switch tube, and the source electrode of the second switch tube is connected with the second port of the first capacitor.

3. The power circuit of the integrated vehicle-mounted charger according to claim 2, wherein a first port of the primary side first winding is connected to a first port of the first capacitor and a first port of the second capacitor, and a second port of the primary side first winding is connected to a source of the first switching tube and a drain of the first switching tube.

4. The power circuit of the integrated vehicle-mounted charger according to claim 1, wherein the second winding input circuit comprises a third capacitor, a fourth capacitor, a third switching tube and a fourth switching tube;

the first port of the third capacitor is connected with the first port of the fourth capacitor, the second port of the fourth capacitor is connected with the drain electrode of the third switch tube, the source electrode of the third switch tube is connected with the drain electrode of the fourth switch tube, and the source electrode of the fourth switch tube is connected with the second port of the third capacitor.

5. The power circuit of the integrated vehicle-mounted charger according to claim 4, wherein a first port of the primary side second winding is connected to a first port of the third capacitor and a first port of the fourth capacitor, and a second port of the primary side second winding is connected to a source of the third switching tube and a drain of the fourth switching tube.

6. The power circuit of the integrated vehicle-mounted charger according to claim 1, wherein the series connection of the first winding input circuit and the second winding input circuit comprises:

the first port of the first winding input circuit is connected with the positive pole of an external input power supply, the second port of the first winding input circuit is connected with the first port of the second winding input circuit, and the second port of the second winding input circuit is connected with the negative pole of the external input power supply.

7. The power circuit of the integrated vehicle-mounted charger according to claim 1, wherein the secondary side circuit comprises a first diode, a second diode, a first inductance unit and a fifth capacitance;

the negative electrode of the first diode is connected with the negative electrode of the second diode and the first port of the first inductance unit, the second port of the first inductance is connected with the first port of the fifth capacitance, the second port of the fifth capacitance is connected with the positive electrode of the second diode and the second port of the secondary winding, and the first port of the secondary winding is connected with the positive electrode of the first diode.

8. The power circuit of the integrated vehicle-mounted charger according to claim 1, wherein the primary side first winding, the primary side second winding and the secondary side winding are wound on the iron core.

9. The power circuit of the integrated vehicle-mounted charger according to claim 1, wherein a sum of a number of turns of the primary side first winding and a number of turns of the primary side second winding is greater than a number of turns of the secondary side winding.

10. A converter, characterized in that it comprises a power supply circuit of an integrated vehicle charger according to any one of claims 1 to 9.

Technical Field

The application relates to the technical field of electronic circuits, in particular to a power circuit and a converter of an integrated vehicle-mounted charger.

Background

With the development of society, the appearance of automobiles brings great convenience to the daily life of people, so that the automobiles become an essential part in life. The traditional automobile can cause great pollution to the environment, so that new energy automobiles such as electric automobiles are promoted, and the electric automobile industry is rapidly developed along with small pollution to the environment.

With the development of new energy vehicles, the voltage of the vehicle-mounted power supply battery pack is higher and higher, and the traditional circuit cannot maintain stable output voltage under high input voltage.

Disclosure of Invention

The embodiment of the application provides a power supply circuit and a converter of an integrated vehicle-mounted charger, which are used for improving the adaptation range of the input voltage of the circuit and maintaining stable output voltage under high input voltage.

The first aspect of the embodiment of the present application provides a power supply circuit of an integrated vehicle-mounted charger, and the power supply circuit of the integrated vehicle-mounted charger includes: the transformer comprises a primary side first winding, a primary side second winding, a secondary side winding and an iron core, wherein the input circuit comprises a first winding input circuit and a second winding input circuit;

the input circuit is connected with the transformer, the primary side first winding is connected with the first winding input circuit, the primary side second winding is connected with the second winding input circuit, and the first winding input circuit is connected with the second winding input circuit in series.

Optionally, the first winding input circuit includes a first capacitor, a second capacitor, a first switching tube and a second switching tube;

the first port of the first capacitor is connected with the first port of the second capacitor, the second port of the second capacitor is connected with the drain electrode of the first switch tube, the source electrode of the first switch tube is connected with the drain electrode of the second switch tube, and the source electrode of the second switch tube is connected with the second port of the first capacitor.

Optionally, a first port of the primary-side first winding is connected to the first port of the first capacitor and the first port of the second capacitor, and a second port of the primary-side first winding is connected to the source of the first switching tube and the drain of the first switching tube.

Optionally, the second winding input circuit includes a third capacitor, a fourth capacitor, a third switching tube and a fourth switching tube;

the first port of the third capacitor is connected with the first port of the fourth capacitor, the second port of the fourth capacitor is connected with the drain electrode of the third switch tube, the source electrode of the third switch tube is connected with the drain electrode of the fourth switch tube, and the source electrode of the fourth switch tube is connected with the second port of the third capacitor.

Optionally, a first port of the primary side second winding is connected to the first port of the third capacitor and the first port of the fourth capacitor, and a second port of the primary side second winding is connected to the source of the third switching tube and the drain of the fourth switching tube.

Optionally, the series connection of the first winding input circuit and the second winding input circuit includes:

the first port of the first winding input circuit is connected with the positive pole of an external input power supply, the second port of the first winding input circuit is connected with the first port of the second winding input circuit, and the second port of the second winding input circuit is connected with the negative pole of the external input power supply.

Optionally, the secondary side circuit includes a first diode, a second diode, a first inductance unit, and a fifth capacitor;

the negative electrode of the first diode is connected with the negative electrode of the second diode and the first port of the first inductance unit, the second port of the first inductance is connected with the first port of the fifth capacitance, the second port of the fifth capacitance is connected with the positive electrode of the second diode and the second port of the secondary winding, and the first port of the secondary winding is connected with the positive electrode of the first diode.

Optionally, the primary side first winding, the primary side second winding and the secondary side winding are wound on the iron core.

Optionally, the sum of the number of turns of the primary-side first winding coil and the number of turns of the primary-side second winding coil is greater than the number of turns of the secondary-side winding coil.

A second aspect of an embodiment of the present application provides a converter, including any one of the power circuits of the integrated vehicle-mounted charger described above.

Two circuits are connected in series to form an upper working branch and a lower working branch, the working states of the upper working branch and the lower working branch are the same, an upper pipe or a lower pipe is switched on and off simultaneously, and a transformer winding is wound on a magnetic core to keep a good coupling relation, so that the energy transmitted to a secondary side in each switching period is the same, the voltages of the upper working branch and the lower working branch can be kept balanced in the working process, and the adaptation range of the input voltage of the circuit is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 1A is a schematic diagram of a first state of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 1B is a schematic diagram of a second state of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 1C is a schematic diagram of a third state of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 1D is a schematic diagram of a fourth state of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a first winding input circuit of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a second winding input circuit of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an input circuit of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a secondary side circuit of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The traditional circuit is suitable for medium and small power switch circuits, the traditional circuit cannot meet the requirement for higher input voltage at present, and in the embodiment of the application, the first winding input circuit and the second winding input circuit jointly bear the input voltage, so that the whole input circuit can bear higher voltage, and the input voltage of the whole circuit can be improved; in order to increase the input voltage of the circuit, a feasible way is to use two traditional input circuits, which are a first winding input circuit and a second winding input circuit respectively, the first winding input circuit and the second winding input circuit are connected in series, the first winding input circuit and the second winding input circuit jointly bear the input high voltage, the first winding input circuit bears a first voltage, the second winding input circuit bears a second voltage, the first voltage generates a first electric signal in the first winding input circuit, the second voltage generates a second electric signal in the second winding input circuit, the first electric signal generates a first magnetic flux in the first winding input circuit, the second electric signal generates a second magnetic flux in the second winding input circuit, the first magnetic flux generates a first induced electromotive force through the primary side first winding, the second magnetic flux generates a second induced electromotive force through the primary side second winding, the first induced electromotive force and the second induced electromotive force are superposed to generate a third induced electromotive force, and the third induced electromotive force generates a low-voltage signal through the secondary winding.

For a better understanding of the embodiments of the present application, reference will now be made in detail to the embodiments of the present application, which are illustrated in the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic diagram of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present disclosure, where the vehicle-mounted switching power circuit includes an input circuit 101, a transformer 102, and a secondary circuit 103, the input circuit 101 includes a first winding input circuit 104 and a second winding input circuit 105, and the transformer 102 includes a primary side first winding 106, a primary side second winding 107, and a secondary winding 108;

optionally, the first winding input circuit 104 includes a first capacitor C1, a second capacitor C2, a first switch tube Q1, and a second switch tube Q2, a first port of the first capacitor C1 is connected to a first port of the second capacitor C2, and a second port of the second capacitor C2 is connected to a drain of the first switch tube Q1. The source of the first switch tube Q1 is connected with the drain of the second switch tube Q2, the source of the second switch tube Q2 is connected with the second port of the first capacitor C1, the first port of the primary side first winding is connected with the first port of the first capacitor C1 and the first port of the second capacitor C2, and the second port of the primary side first winding is connected with the source of the first switch tube Q1 and the drain of the second switch tube Q2.

Optionally, the second winding input circuit 105 includes a third capacitor C3, a fourth capacitor C4, a third switch tube Q3, and a fourth switch tube Q4, a first port of the third capacitor C3 is connected to a first port of the fourth capacitor C4, and a second port of the fourth capacitor C4 is connected to a drain of the third switch tube Q3. The source of the third switching tube Q3 is connected with the drain of the fourth switching tube Q4, the source of the fourth switching tube Q4 is connected with the second port of the third capacitor C3, the first port of the primary side second winding is connected with the first port of the third capacitor C3 and the first port of the fourth capacitor C4, and the second port of the primary side second winding is connected with the source of the third switching tube Q3 and the drain of the fourth switching tube Q4.

When the first switch tube Q1 and the third switch tube Q3 are synchronously turned on, and the second switch tube Q2 and the fourth switch tube Q4 are synchronously turned off, the direction of the first magnetic flux of the first electric signal in the transformer is horizontal to the left, and the direction of the second magnetic flux of the second electric signal in the transformer is horizontal to the left; under the condition that the second switch tube Q2 and the fourth switch tube Q4 are synchronously switched on, and the first switch tube Q1 and the third switch tube Q3 are synchronously switched off, the direction of the first magnetic flux of the first electric signal in the transformer is horizontal to the right, and the direction of the second magnetic flux of the second electric signal in the transformer is horizontal to the right;

optionally, a first port of the first winding input circuit 104 is connected to an anode of an external input power supply, a second port of the first winding input circuit 104 is connected to a first port of the second winding input circuit 105, and a second port of the second winding input circuit 105 is connected to a cathode of the external input power supply;

optionally, a first port of the first winding input circuit 104 is connected to a positive electrode of the input power supply, a second port of the second winding input circuit 105 is connected to a negative electrode of the input power supply, a second port of the first winding input circuit 104 is connected to a first port of a third capacitor C3 and a first port of a fourth capacitor C4, a first port of the second winding input circuit is connected to a second port of a first capacitor C1, a gate of a second switch Q2 and a source of the second switch Q2, that is, the first winding input circuit 104 is connected in series with the second winding input circuit 105, and a second port of the first winding input circuit 104 is connected to a first port of the second winding input circuit 105;

the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are all zero-voltage switches;

optionally, a first port of the secondary winding is connected to an anode of a first diode D1, a cathode of the first diode D1 is connected to a cathode of a second diode D2 and a first port of a first inductance unit L1, a second port of the first inductance L1 is connected to a first port of a fifth capacitor C5, and a second port of a fifth capacitor C5 is connected to an anode of the second diode D2 and a second port of the secondary winding;

the sum of the number of turns of the primary side first winding coil and the number of turns of the primary side second winding coil is greater than the number of turns of the secondary side winding coil;

the primary side first winding, the primary side second winding and the secondary side winding are wound on the same iron core.

Optionally, the first winding input circuit 104 and the second winding input circuit 105 jointly carry an input high voltage, a first electrical signal is generated in the first winding input circuit 104, a second electrical signal is generated in the second winding input circuit 105, the first electrical signal generates a first magnetic flux in the primary side first winding 106, the second electrical signal generates a second magnetic flux in the primary side second winding 107, the first magnetic flux generates a first induced electromotive force through the primary side first winding 106, the second magnetic flux generates a second induced electromotive force through the primary side second winding 107, the first induced electromotive force and the second induced electromotive force are superimposed to generate a third induced electromotive force, and the third induced electromotive force generates a low voltage signal through the secondary winding 108.

The following describes the working process of the integrated vehicle-mounted charger in detail based on the schematic diagram of the power circuit of the integrated vehicle-mounted charger shown in fig. 1.

First, since the first winding input circuit 104 and the second winding input circuit 105 have the same configuration, the internal component parameters of both are also the same. For example, the capacitance of the capacitor C1 is the same as that of the capacitor C3, and the rest of the components should be understood as the same, and will not be described herein again. Next, in the input circuit 101, the first switch Q1 and the third switch Q3 are turned on or off synchronously, and the second switch Q2 and the fourth switch Q4 are turned on or off synchronously, in other words, the signals received by the gate of the first switch Q1 and the gate of the third switch Q3 are the same, the signals received by the gate of the second switch Q2 and the gate of the fourth switch Q4 are the same, and in addition, the first winding input circuit 104 is connected in series with the second winding input circuit 105, so that the partial voltages of the two for the input signals are the same.

Further, the work flow of the power circuit of the integrated vehicle-mounted charger includes four stages in one cycle, specifically as follows:

the first stage is as follows: as shown in fig. 1A, the power circuit of the integrated vehicle-mounted charger is in a first state, wherein the second switching tube Q2 and the fourth switching tube Q4 are simultaneously turned on, the first capacitor C1 discharges through the primary side first winding and the second switching tube Q2, the second capacitor C2 discharges through the primary side second winding and the fourth switching tube Q4, because the primary side first winding, the primary side second winding and the secondary side winding are coupled, the first diode D1 is in a conducting state, the secondary side winding charges the first inductor L1 and the fifth capacitor through the first diode D1, and the current in the first inductor L1 increases linearly.

In the second stage, as shown in fig. 1B, the power circuit of the integrated vehicle-mounted charger is in the second state, wherein the second switching tube Q2 and the fourth switching tube Q4 are turned off synchronously, because the current of the primary side first winding and the current of the primary side second winding cannot change suddenly, the current of the primary side first winding first charges the junction capacitor of the source and the drain in the second switching tube Q2, the current of the primary side second winding first charges the junction capacitor of the source and the drain in the fourth switching tube Q4, wherein the junction capacitor of the source and the drain is the junction capacitor between the source and the drain of the switching tube, and when the voltage U of the source and the drain in the second switching tube Q2 is higher than the voltage U of the source and the drain_q2＝U_c1+U_c2And the source drain voltage U of the fourth switch tube Q4_q4＝U_c3+U_c4In which U is_q2Voltage, U, representing the source-drain junction capacitance in the second switching tube Q2_q4Voltage, U, representing the source-drain junction capacitance in the fourth switching tube Q4_c1Representing the voltage, U, across the first capacitor C1_c2Representing the voltage, U, across the second capacitor C2_c3Represents the voltage, U, across the third capacitor C3_c4The voltage at two ends of a fourth capacitor C4 is shown, the body diodes of a first switch tube Q1 and a third switch tube Q3 are simultaneously conducted, the currents of a primary side first winding and a primary side second winding are used for charging a second capacitor C2 and a fourth capacitor C4 through the body diodes of the first switch tube Q1 and the third switch tube Q3, the electromotive force directions of the primary side first winding, the primary side second winding and the secondary side winding are reversed, namely, the primary side first winding, the primary side second winding and the secondary side winding are positive and negative, at the moment, a first diode D1 is in a cut-off state, similarly, the current of a first inductor L1 cannot be suddenly changed, the current of the first inductor L1 is used for charging a fifth capacitor C5 through a second diode D2, and the current of the first inductor L1 is linearly reduced.

In the third stage, as shown in fig. 1C, the power circuit of the integrated vehicle charger is in the third state, the currents of the primary side first winding and the primary side second winding charge the second capacitor C2 and the fourth capacitor C4, meanwhile, the current of the primary side first winding and the primary side second winding decreases linearly, when the current of the primary side first winding and the primary side second winding is reduced to zero, the first switching tube Q1 and the third switching tube Q3 are conducted synchronously, the second capacitor C2 charges the primary side first winding through the first switching tube Q1, the fourth capacitor C4 charges the primary side second winding through the third switching tube Q3, the current increases in the opposite direction, the induced potential directions generated by the primary side first winding and the primary side second winding are positive at the bottom and negative at the top, at the moment, the first diode D1 is still in the off state, the second diode D2 is still in the on state, and the current of the first inductor L1 continuously decreases.

A fourth stage, as shown in fig. 1D, the power circuit of the integrated vehicle-mounted charger is in a fourth state, where the first switching tube Q1 and the third switching tube Q3 are turned off at the same time, and since the currents of the primary first winding and the primary second winding cannot change suddenly, the currents in the primary first winding and the primary second winding respectively charge the source-drain junction capacitors on the first switching tube Q1 and the third switching tube Q3, the source-drain junction capacitors of the second switching tube Q2 and the fourth switching tube Q4 discharge, when the source-drain voltages of the second switching tube Q2 and the fourth switching tube Q4 decrease to zero, the internal diodes of the second switching tube Q2 and the fourth switching tube Q4 are turned on, the current of the primary first winding flows into the first capacitor C1 through the second switching tube Q2, the current of the primary second winding flows into the third capacitor C3 through the fourth switching tube Q4, and at this time, the current of the primary first winding and the second winding flows into the third capacitor C3 through the fourth switching tube Q4, The electromotive force direction of the secondary winding is positive, negative, and the first diode D1 is in a conducting state, and the current of the secondary winding flows to the fifth capacitor C5 through the first diode D1 and the first inductor L1, and the current continuously increases.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a power circuit of an integrated vehicle-mounted charger according to an embodiment of the present application, where the power circuit of the integrated vehicle-mounted charger includes: an input circuit 101, a transformer 102 and a secondary circuit 103. Wherein the input circuit 101 comprises a first winding input circuit 104 and a second winding input circuit 105. The transformer 102 comprises a primary side first winding 106, a primary side second winding 107 and a secondary side winding 108;

optionally, the first winding input circuit 104 and the second winding input circuit 105 are connected in series, the first winding input circuit 104 and the second winding input circuit 105 are connected to the transformer 102, a first port and a second port of the first winding input circuit 104 are connected to the primary side first winding 106, a first port and a second port of the second winding input circuit 105 are connected to the primary side second winding 107, and a first port and a second port of the secondary winding 108 are connected to the secondary side circuit 103, wherein;

a first winding input circuit 104 for generating a first electrical signal based on a first input voltage through the first winding input circuit 104;

a second winding input circuit 105 for generating a second electrical signal according to a second input voltage through the second winding input circuit 105;

a primary side first winding 106 for converting a first electrical signal into a first magnetic flux;

a primary side second winding 107 for converting the second electrical signal into a second magnetic flux;

a secondary winding 108 for receiving a third magnetic flux generated by superposition of the first magnetic flux and the second magnetic flux, the third magnetic flux generating an induced electromotive force by the secondary winding 108;

a secondary side circuit 103 for converting the induced electromotive force into a low voltage signal and outputting the low voltage signal;

compared with an input circuit, the input circuit has the advantages that the two input circuits are connected in series to form two working branches, and the first winding input circuit and the second winding input circuit jointly bear input voltage, so that the input voltage of the circuit can be improved; furthermore, compared with the mode that the input voltage of the circuit is improved by using two input circuits, the two input circuits correspond to two transformers, and only one transformer is needed in the embodiment of the application, so that the cost of the circuit can be saved.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a first winding input circuit of a power circuit of an integrated vehicle charger according to an embodiment of the present disclosure, in which the first winding input circuit 104 includes a first capacitor C1, a second capacitor C2, a first switch tube Q1, and a second switch tube Q2;

optionally, a first port of the first capacitor C1 is connected to a first port of the second capacitor C2, and a second port of the second capacitor C2 is connected to the drain of the first switch Q1. The source of the first switch tube Q1 is connected with the drain of the second switch tube Q2, the source of the second switch tube Q2 is connected with the second port of the first capacitor C1, the first port of the primary side first winding is connected with the first port of the first capacitor C1, the first port of the primary side first winding is connected with the first port of the second capacitor C2, and the second port of the primary side first winding is connected with the source of the first switch tube Q1 and the drain of the second switch tube Q2.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a second winding input circuit of a power circuit of an integrated vehicle charger according to an embodiment of the present disclosure, where the second winding input circuit 105 includes a third capacitor C3, a fourth capacitor C4, a third switch tube Q3, and a fourth switch tube Q4;

optionally, a first port of the third capacitor C3 is connected to a first port of the fourth capacitor C4, and a second port of the fourth capacitor C4 is connected to the drain of the third switching transistor Q3. The source of the third switching tube Q3 is connected with the drain of the fourth switching tube Q4, the source of the fourth switching tube Q4 is connected with the second port of the third capacitor C3, the first port of the primary side second winding is connected with the first port of the third capacitor C3, the first port of the primary side second winding is connected with the first port of the fourth capacitor C4, and the second port of the primary side second winding is connected with the source of the third switching tube Q3 and the drain of the fourth switching tube Q4.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an input circuit of a power circuit of an integrated vehicle charger according to an embodiment of the present application, where the input circuit includes a first winding input circuit 104 and a second winding input circuit 105;

optionally, the first port 201 of the first winding input circuit 104 is connected to the positive pole of the input power, the second port 202 of the second winding input circuit 105 is connected to the negative pole of the input power, the second port 203 of the first winding input circuit 104 is connected to the first port of the third capacitor C3 and the first port of the fourth capacitor C4, the first port 204 of the second winding input circuit is connected to the second port of the first capacitor C1 and the source of the second switch Q2, that is, the first winding input circuit 104 is connected in series with the second winding input circuit 105, and the second port 203 of the first winding input circuit 104 is connected to the first port 204 of the second winding input circuit 105;

the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are all zero-voltage switches.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a secondary side circuit of a power circuit of an integrated vehicle charger according to an embodiment of the present disclosure, where the secondary side circuit includes a first diode D1, a second diode D2, a first inductor L1, and a fifth capacitor C5;

optionally, a first port of the secondary winding is connected to an anode of a first diode D1, a cathode of the first diode D1 is connected to a cathode of a second diode D2 and a first port of a first inductor L1, a cathode of the second diode D2 is connected to a first port of a first inductor L1 and a first port of a first inductor L1, a second port of the first inductor L1 is connected to a first port of a fifth capacitor C5, a second port of the fifth capacitor C5 is connected to an anode of the second diode D2 and a second port of the secondary winding, the second diode D2 is connected to a second port of the secondary winding, and the first port 205 and the second port 206 of the secondary circuit are output ports connected to an external device.

The embodiment of the application provides a converter, which comprises the power circuit of the integrated vehicle-mounted charger.

It should be noted that, for the sake of simplicity, the embodiments of the present application are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application with specific examples, and the above description of the embodiments is only provided to help understand the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific implementation and application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.