阅读说明：本技术 动力系统及车辆 (Power system and vehicle ) 是由 肖隆兴 林川川 顾捷 杨鹏 危自强 于 2021-09-15 设计创作，主要内容包括：本申请提供一种动力系统及车辆,动力系统包括电池、电机控制器、第一磁环、电机；电池的负极与充电电源的负极相连；电机控制器的第一桥臂电路、第二桥臂电路和第三桥臂电路的第一端均与电池的正极连接,第一桥臂电路、第二桥臂电路和第三桥臂电路的第二端均与电池的负极相连；电机的绕组与对应的桥臂电路的连接端相连；其中,第一连接线、第二连接线、以及第三连接线均穿过第一磁环,第三绕组的第一端还通过电机引出线与充电电源的正极相连,电机引出线与第三连接线的公共端位于第一磁环靠近电机控制器的一侧,因此,本申请的动力系统和车辆能通过第一磁环降低共模干扰,且能避免第一磁环饱和而影响抑制共模干扰的效果。(The application provides a power system and a vehicle, wherein the power system comprises a battery, a motor controller, a first magnetic ring and a motor; the negative pole of the battery is connected with the negative pole of the charging power supply; first ends of a first bridge arm circuit, a second bridge arm circuit and a third bridge arm circuit of the motor controller are all connected with the positive electrode of the battery, and second ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit are all connected with the negative electrode of the battery; the windings of the motors are connected with the connecting ends of the corresponding bridge arm circuits; the first connecting wire, the second connecting wire and the third connecting wire penetrate through the first magnetic ring, the first end of the third winding is connected with the anode of the charging power supply through the motor outgoing wire, and the common end of the motor outgoing wire and the third connecting wire is located on one side, close to the motor controller, of the first magnetic ring.)

1. A power system is characterized by comprising a battery, a motor controller, a first magnetic ring and a motor;

the battery comprises a positive electrode and a negative electrode, and the negative electrode of the battery is connected with the negative electrode of the charging power supply;

the motor controller comprises a first bridge arm circuit, a second bridge arm circuit and a third bridge arm circuit, wherein first ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit are all connected with the positive pole of the battery, and second ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit are all connected with the negative pole of the battery;

the motor comprises a first winding, a second winding and a third winding, wherein the first end of the first winding is connected with the connecting end of the first bridge arm circuit through a first connecting wire, the first end of the second winding is connected with the connecting end of the second bridge arm circuit through a second connecting wire, the first end of the third winding is connected with the connecting end of the third bridge arm circuit through a third connecting wire, and the second end of the first winding is connected with the second end of the second winding and the second end of the third winding;

the first connecting wire, the second connecting wire and the third connecting wire penetrate through the first magnetic ring, the third connecting wire is connected with the anode of the charging power supply through a motor outgoing line, and the common end of the third connecting wire and the motor outgoing line is located on one side, close to the motor controller, of the first magnetic ring.

2. The power system according to claim 1, wherein when the battery is charged with the voltage increased by the charging power source and the motor, a current on the third connection line flows in a direction opposite to a current on the first connection line, and/or a current on the third connection line flows in a direction opposite to a current on the second connection line.

3. The powertrain system of claim 1, wherein the first leg circuit comprises a first switching element, a first diode, a second switching element, a second diode;

a first pass end of the first switching element is used as a first end of the first bridge arm circuit and is connected with the positive electrode of the battery;

the cathode of the first diode is connected with the anode of the battery, and the anode of the first diode is connected with the second path end of the first switching element;

a first path end of the second switching element is connected with a second path end of the first switching element and is used as a connecting end of the first bridge arm circuit to be connected with the first winding, and a second path end of the second switching element is used as a second end of the first bridge arm circuit to be connected with a negative electrode of the battery;

the cathode of the second diode is connected to the first pass end of the second switching element, and the anode of the second diode is connected to the cathode of the battery.

4. The powertrain system of claim 3, wherein the internal structure of the second leg circuit and the internal structure of the third leg circuit are the same as the internal structure of the first leg circuit.

5. The power system of claim 1 wherein the motor controller further comprises a second magnetic ring;

the second magnetic ring is sleeved on a connecting line between the positive electrode of the battery and the first end of the first bridge arm circuit, sleeved on a connecting line between the negative electrode of the battery and the second end of the first bridge arm circuit and sleeved on the motor lead-out wire.

6. The powertrain system of claim 1, wherein the motor controller further comprises a stabilizing capacitor;

the stabilization capacitor is arranged between the positive electrode of the battery and the negative electrode of the battery.

7. The power system of claim 1, wherein the motor controller further comprises a first safety capacitor, a second safety capacitor, a third safety capacitor;

the first safety capacitor is arranged between the positive electrode of the battery and the negative electrode of the battery;

the first end of the second safety capacitor is connected with the positive electrode of the battery, and the second end of the second safety capacitor is grounded;

and the first end of the third safety capacitor is grounded, and the second end of the third safety capacitor is connected with the negative electrode of the battery.

8. The power system of claim 1, further comprising a main positive switch, a main negative switch, a charging contact;

the main positive switch is positioned between the positive electrode of the battery and the first end of the first bridge arm circuit;

the main negative switch is positioned between the negative electrode of the battery and the negative electrode of the charging power supply;

the charging contact is located between the positive pole of the charging power source and the third winding.

9. The power system of claim 1, further comprising a bypass contactor;

the bypass contactor is located between the positive pole of the battery and the positive pole of the charging power source.

10. A vehicle characterized by comprising a power system according to any one of claims 1 to 9.

Technical Field

The application relates to the technical field of power, in particular to a power system and a vehicle.

Background

With the continuous development of new energy electric automobile technology, new energy electric automobiles are gradually replacing traditional fuel oil vehicles and become the first choice for users to purchase vehicles.

The power system of the new energy electric automobile comprises a battery, a motor controller and a motor. The power system is in a normal driving mode, the battery provides direct current voltage, and the motor is driven to rotate after the direct current voltage is converted into alternating current voltage through the motor controller. And in the charging mode, the new energy electric automobile charges the battery by the charging power supply.

However, the conventional power system generates large common mode interference during operation, and thus generates a large degree of electromagnetic interference.

Disclosure of Invention

In view of the above technical problem, the present application provides a power system and a vehicle, which can reduce common mode interference.

In order to solve the technical problem, the present application provides a power system, which includes a battery, a motor controller, a motor, and a first magnetic ring. The battery comprises a positive electrode and a negative electrode, and the negative electrode of the battery is connected with the negative electrode of the charging power supply. The motor controller comprises a first bridge arm circuit, a second bridge arm circuit and a third bridge arm circuit, first ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit are all connected with the positive pole of the battery, and second ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit are all connected with the negative pole of the battery. The motor comprises a first winding, a second winding and a third winding, wherein the first end of the first winding is connected with the connecting end of the first bridge arm circuit through a first connecting wire, the first end of the second winding is connected with the connecting end of the second bridge arm circuit through a second connecting wire, the first end of the third winding is connected with the connecting end of the third bridge arm circuit through a third connecting wire, and the second end of the first winding is connected with the second end of the second winding and the second end of the third winding. The first connecting wire, the second connecting wire and the third connecting wire penetrate through the first magnetic ring, the third connecting wire is connected with the anode of the charging power supply through a motor outgoing line, and the common end of the third connecting wire and the motor outgoing line is located on one side, close to the motor controller, of the first magnetic ring.

Optionally, when the battery is charged by the charging power supply and the motor in a boost mode, a current on the third connection line flows in a direction opposite to a current on the first connection line, and/or a current on the third connection line flows in a direction opposite to a current on the second connection line.

Optionally, the first bridge arm circuit includes a first switching element, a first diode, a second switching element, and a second diode. A first pass end of the first switching element serves as a first end of the first bridge arm circuit, and is connected to the positive electrode of the battery. The cathode of the first diode is connected with the anode of the battery, and the anode of the first diode is connected with the second path end of the first switch element. And the first pass end of the second switching element is connected with the second pass end of the first switching element and is used as the connecting end of the first bridge arm circuit to be connected with the first winding, and the second pass end of the second switching element is used as the second end of the first bridge arm circuit to be connected with the cathode of the battery. The cathode of the second diode is connected to the first pass end of the second switching element, and the anode of the second diode is connected to the cathode of the battery.

Optionally, an internal structure of the second bridge arm circuit and an internal structure of the third bridge arm circuit are both the same as an internal structure of the first bridge arm circuit.

Optionally, the motor controller further comprises a second magnetic ring. The second magnetic ring is sleeved on a connecting line between the positive electrode of the battery and the first end of the first bridge arm circuit, sleeved on a connecting line between the negative electrode of the battery and the second end of the first bridge arm circuit and sleeved on the motor lead-out wire.

Optionally, the motor controller further comprises a stabilizing capacitor. The stabilization capacitor is arranged between the positive electrode of the battery and the negative electrode of the battery.

Optionally, the motor controller further includes a first safety capacitor, a second safety capacitor, and a third safety capacitor. The first safety capacitor is arranged between the positive electrode of the battery and the negative electrode of the battery. And the first end of the second safety capacitor is connected with the anode of the battery, and the second end of the second safety capacitor is grounded. And the first end of the third safety capacitor is grounded, and the second end of the third safety capacitor is connected with the negative electrode of the battery.

Optionally, the power system further comprises a main positive switch, a main negative switch, and a charging contactor. The main positive switch is located between the positive electrode of the battery and the first end of the first bridge arm circuit. The main negative switch is located between the negative electrode of the battery and the negative electrode of the charging power supply, and is located between the negative electrode of the battery and the second end of the first bridge arm circuit. The charging contact is located between the positive pole of the charging power source and the third winding.

Optionally, the power system further comprises a bypass contactor. The bypass contactor is located between the positive pole of the battery and the positive pole of the charging power source.

The application also provides a vehicle comprising the power system.

As described above, in the power system and the vehicle of the present application, the first connection line, the second connection line, and the third connection line all pass through the first magnetic ring, the first end of the third winding is further connected to the positive electrode of the charging power supply through the motor outgoing line, and the common end of the motor outgoing line and the third connection line is located on one side of the first magnetic ring close to the motor controller, so that the power system and the vehicle of the present application can reduce common mode interference through the first magnetic ring. In addition, when the battery is charged in a boosting mode through the charging power supply and the motor, the power system and the vehicle can enable the current flowing direction of the third connecting line to be opposite to the current flowing direction of the first connecting line, and/or enable the current flowing direction of the third connecting line to be opposite to the current flowing direction of the second connecting line, and therefore the effect of restraining common mode interference due to saturation of the first magnetic ring can be avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a structure and connection relationship of a power system according to a first embodiment of the present application.

Fig. 2 is a schematic diagram of a structure and connection relationship of a power system according to a second embodiment of the present application.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings. With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of an element by the phrase "comprising an … …" does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises the element, and further, where similarly-named elements, features, or elements in different embodiments of the disclosure may have the same meaning, or may have different meanings, that particular meaning should be determined by their interpretation in the embodiment or further by context with the embodiment.

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Fig. 1 is a schematic diagram of a structure and connection relationship of a power system according to a first embodiment of the present application. As shown in fig. 1, the power system includes a battery 10, a motor controller 11, a first magnetic ring 12, and a motor 13.

The battery 10 includes a positive electrode and a negative electrode, and the negative electrode of the battery 10 is connected to the negative electrode of the charging power source 20. Motor controller 11 includes a first leg circuit 110, a second leg circuit 111, and a third leg circuit 112. First ends of the first bridge arm circuit 110, the second bridge arm circuit 111 and the third bridge arm circuit 112 are all connected with a positive electrode of the battery 10, and second ends of the first bridge arm circuit 110, the second bridge arm circuit 111 and the third bridge arm circuit 112 are all connected with a negative electrode of the battery 10.

Specifically, in the present embodiment, first leg circuit 110 may include first switching element V1 and first diode D1, second switching element V2 and second diode D2. The second leg circuit 111 may include a third switching element V3, a third diode D3, a fourth switching element V4, and a fourth diode D4. The third bridge arm circuit 112 may include a fifth switching element V5, a fifth diode D5, a sixth switching element V6, and a sixth diode D6.

A first path terminal of first switching element V1 is connected to the positive electrode of battery 10 as a first terminal of first arm circuit 110, and a second path terminal of first switching element V1 is connected to a first path terminal of second switching element V2 as a connection terminal u1 of first arm circuit 110 and connected to motor 12. A cathode of the first diode D1 is connected to an anode of the battery 10, and an anode of the first diode D1 is connected to the second path terminal of the first switching element V1. A second path terminal of second switching element V2 serves as a second terminal of first arm circuit 110, and is connected to the negative electrode of battery 10. A cathode of the second diode D2 is connected to the first path terminal of the second switching element V2, and an anode of the second diode D2 is connected to a cathode of the battery 10. A first path terminal of third switching element V3 is connected to the positive electrode of battery 10 as a first terminal of second arm circuit 111, and a second path terminal of third switching element V3 is connected to a first path terminal of fourth switching element V4 and connected to motor 12 as a connection terminal u2 of second arm circuit 111. A cathode of the third diode D3 is connected to an anode of the battery 10, and an anode of the third diode D3 is connected to the second path terminal of the third switching element V3. A second path terminal of fourth switching element V4 serves as a second terminal of second arm circuit 111, and is connected to the negative electrode of battery 10. A cathode of the fourth diode D4 is connected to the first path terminal of the fourth switching element V4, and an anode of the fourth diode D4 is connected to a cathode of the battery 10. A first path terminal of the fifth switching element V5 is connected to the positive electrode of the battery 10 as a first terminal of the third arm circuit 112, and a second path terminal of the fifth switching element V5 is connected to a first path terminal of the sixth switching element V6 and is connected to the motor 12 as a connection terminal u3 of the third arm circuit 112. A cathode of the fifth diode D5 is connected to the anode of the battery 10, and an anode of the fifth diode D5 is connected to the second path terminal of the fifth switching element V5. The second path terminal of the sixth switching element V6 serves as the second terminal of the third arm circuit 112, and is connected to the negative electrode of the battery 10. A cathode of the sixth diode D6 is connected to the first path terminal of the sixth switching element V6, and an anode of the sixth diode D6 is connected to a cathode of the battery 10.

In the present embodiment, the first switching element V1, the second switching element V2, the third switching element V3, the fourth switching element V4, the fifth switching element V5, and the sixth switching element V6 are all N-channel enhancement type Insulated Gate Bipolar Transistors (IGBTs). First path terminals of the first switching element V1, the second switching element V2, the third switching element V3, the fourth switching element V4, the fifth switching element V5 and the sixth switching element V6 are all drains. Second pass terminals of the first switching element V1, the second switching element V2, the third switching element V3, the fourth switching element V4, the fifth switching element V5 and the sixth switching element V6 are all sources. In other embodiments, at least one of the first switch element V1, the second switch element V2, the third switch element V3, the fourth switch element V4, the fifth switch element V5, and the sixth switch element V6 may be another type of switch element, such as a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).

The motor 13 includes a first winding L1, a second winding L2, and a third winding L3. A first end of first winding L1 is connected to connection terminal u1 of first bridge arm circuit 110 via a first connection line, a first end of second winding L2 is connected to connection terminal u2 of second bridge arm circuit 111 via a second connection line, a first end of third winding L3 is connected to connection terminal u3 of third bridge arm circuit 112 via a third connection line, and a second end of first winding L1 is connected to a second end of second winding L2 and a second end of third winding L3.

The first connecting line, the second connecting line and the third connecting line all penetrate through the first magnetic ring 12, the third connecting line is further connected with the positive electrode of the charging power supply 20 through the motor outgoing line, and the common end P of the third connecting line and the motor outgoing line is located on one side, close to the motor controller 11, of the first magnetic ring 12.

In the embodiment, the power system can further comprise a main positive switch S1, a main negative switch S2 and a charging contact K1. Main positive switch S1 is located between the positive electrode of battery 10 and the first end of first leg circuit 110. Main negative switch S2 is located between the negative electrode of battery 10 and the negative electrode of charging power supply 20, and between the negative electrode of battery 10 and the second end of first bridge arm circuit 110. The charging contactor K1 is located between the positive pole of the charging power source 20 and the third winding L3.

When the power system is in the boost charging mode, the battery 10 is boosted and charged by the charging power supply 20 and the motor 13. The battery 10 is boosted and charged to include an energy storage phase and a charging phase. In the energy storage phase, the charging contact K1, the main positive switch S1 and the main negative switch S2 are all closed, the first switch element V1, the third switch element V3, the fifth switch element V5 and the sixth switch element V6 are all in an open state, the second switch element V2 and the fourth switch element V4 are all in a closed state, the first end of the first winding L1 is electrically connected with the negative electrode of the charging power supply 20 through the closed second switch element V2, the first end of the second winding L2 is electrically connected with the negative electrode of the charging power supply 20 through the closed fourth switch element V4, and the first winding L1 and the second winding L2 store energy. In the charging phase, the first switching element V1, the third switching element V3, the fifth switching element V5 and the sixth switching element V6 are all in an f-off state, the second switching element V2 and the fourth switching element V4 are all switched to an off state, and the first winding L1 and the second winding L2 are electrically connected to the positive electrode of the battery 10 through the first diode D1 and the third diode D3, respectively, so that the battery 10 is charged.

As can be seen from the above description, when the battery 10 is boosted and charged by the charging power supply 20 and the motor 13, in the energy storage phase and the charging phase, the charging current provided by the charging power supply 20 flows from the motor lead to the first end of the third winding L3 through the common terminal P between the motor lead and the third connection line, the current on the first connection line flows from the first end of the first winding L1 to the connection terminal u1 of the first arm circuit 110, and the current on the second connection line flows from the first end of the second winding L2 to the connection terminal u2 of the second arm circuit 111. Therefore, when the battery 10 is boosted and charged by the charging power supply 20 and the motor 13, the current flowing in the third connection line is opposite to the current flowing in the first connection line, and the current flowing in the third connection line is also opposite to the current flowing in the second connection line, so that the current in the first magnetic ring 12 flows in both directions, the first magnetic ring 12 can be effectively prevented from being saturated, and the effect of the first magnetic ring 12 on suppressing common mode interference can be ensured.

The main positive switch S1, the main negative switch S2, the charging touch controller K1, the first switch element V1, the second switch element V2, the third switch element V3, the fourth switch element V4, the fifth switch element V5, and the sixth switch element V6 may be controlled by a controller (not shown). In other embodiments, during the energy storage phase, the controller may alternatively close the second switching element V2 and the fourth switching element V4, or alternatively close the first winding L1 and the second winding L2 to alternatively store energy, or alternatively store energy. When the first winding L1 and the second winding L2 store energy alternatively or alternatively, the operating principle of the power system is similar to that of storing energy simultaneously by the first winding L1 and the second winding L2, and the description thereof is omitted.

When the power system is in a normal driving mode, the main positive switch S1 and the main negative switch S2 are closed, the charging contact K1 is disconnected, the battery 10 provides direct current, and the first bridge arm circuit 110, the second bridge arm circuit 111 and the third bridge arm circuit 112 in the motor controller 11 receive a pulse width modulation signal output by a controller (not shown in the figure), so that the direct current provided by the battery 10 is converted into three-phase alternating current, and the three-phase alternating current is output to the motor 13 through the first connecting line, the second connecting line and the third connecting line to drive the motor 13 to rotate. Because the first connecting line, the second connecting line and the third connecting line all pass through the first magnetic ring 12, when the power system is in a normal driving mode, the first magnetic ring 12 can also play a role in reducing common mode interference.

Specifically, the principle that the first bridge arm circuit 110, the second bridge arm circuit 111, and the third bridge arm circuit 112 respectively receive corresponding pulse width modulation signals output by a controller (not shown in the figure), so as to convert the direct current provided by the battery 10 into three-phase alternating current is as follows: first switching element V1 and second switching element V2 in first bridge arm circuit 110 are alternately closed, third switching element V3 and fourth switching element V4 in second bridge arm circuit 111 are alternately closed, fifth switching element V5 and sixth switching element V6 in third bridge arm circuit 112 are alternately closed, and angles at which first bridge arm circuit 110, second bridge arm circuit 111 and third bridge arm circuit 112 start to conduct electricity are sequentially different by 120 °, so that direct current can be converted into three-phase alternating current.

As can be seen from the above description, the power system of this embodiment can perform common mode filtering through the first magnetic ring 12 in the normal driving mode and the boosting charging mode, and the currents in the first magnetic ring 12 both flow in two directions in the energy storage phase and the charging phase of the boosting charging mode, so as to effectively prevent the first magnetic ring 12 from being saturated, and further ensure the effect of the first magnetic ring 12 on suppressing the common mode interference.

Fig. 2 is a schematic diagram illustrating the structure and connection of a power system according to a second embodiment of the present application. The power system shown in fig. 2 includes a battery 10, a motor controller 11a, a first magnetic ring 12, a motor 13, a connector 14, a main positive switch S1, a main negative switch S2, a charging contact K1, and a bypass contact K2.

The working principle of the battery 10, the first magnetic ring 12, the motor 13, the main positive switch S1, the main negative switch S2, and the charging contact K1 may refer to the description related to the first embodiment, and are not repeated herein.

In this embodiment, motor controller 11a includes first arm circuit 110, second arm circuit 111, third arm circuit 112, stabilizing capacitor C, first safety capacitor Cx, second safety capacitor Cy1, and third safety capacitor Cy 2. The working principle of the first bridge arm circuit 110, the second bridge arm circuit 111, and the third bridge arm circuit 112 may refer to the description related to the first embodiment, and are not described herein again. The stable capacitor C is disposed between the positive electrode of the battery 10 and the negative electrode of the battery 10. The first safety capacity Cx is provided between the positive electrode of the battery 10 and the negative electrode of the battery 10. A first terminal of the second safety capacitor Cy1 is connected to the positive terminal of the battery 10, and a second terminal of the second safety capacitor Cy1 is grounded. The first end of the third safety capacitor Cy2 is grounded, and the second end of the third safety capacitor Cy2 is connected to the negative electrode of the battery 10.

In this embodiment, the motor controller 11a further includes a second magnetic ring 113. The second magnetic ring 113 is sleeved on a connection line between the positive electrode of the battery 10 and the first end of the first bridge arm circuit 110, sleeved on a connection line between the negative electrode of the battery 10 and the second end of the first bridge arm circuit 110, and further sleeved on a motor lead-out line.

When the power system is in the boost charging mode, the battery 10 is boosted and charged by the charging power supply 20 and the motor 13. The battery 10 is boosted and charged to include an energy storage phase and a charging phase.

Specifically, during the energy storage phase, the charging contactor K1, the main positive switch S1 and the main negative switch S2 are all closed, the bypass contactor K2 is opened, the first switching element V1, the third switching element V3, the fifth switching element V5 and the sixth switching element V6 are all in an opened state, the second switching element V2 and the fourth switching element V4 are in a closed state, the charging current provided by the charging power supply 20 flows from the motor outlet through the common terminal P to the third connection line, the current output from the first end of the first winding L1 flows from the second end of the first bridge arm circuit 110 to the negative electrode of the charging power supply 20 through the closed second switching element V2, the current output from the first end of the second winding L2 flows from the second end of the second bridge arm circuit 111 to the negative electrode of the charging power supply 20 through the closed fourth switching element V4, and the first winding L1 and the second winding L2 perform energy storage.

As can be seen from the above description of the energy storage phase, in the energy storage phase, the current on the motor lead-out wire flows from the positive electrode of the charging power supply 20 to the common terminal P, and the current on the connection line between the second terminal of the first bridge arm circuit 110 and the negative electrode of the battery 10 flows from the second terminal of the first bridge arm circuit 110 to the negative electrode of the charging power supply 20, so that the current in the second magnetic ring 113 also flows in both directions, and the second magnetic ring 113 can be effectively prevented from being saturated, thereby ensuring the effect of the second magnetic ring 113 on suppressing the common mode interference.

Specifically, in the charging phase, the first switching element V1, the third switching element V3, the fifth switching element V5, and the sixth switching element V6 are all in an off state, the second switching element V2 and the fourth switching element V4 are all switched to an off state, the charging current provided by the charging power supply 20 flows into the common terminal P through the motor lead wire and flows into the first terminal of the third winding L3 from the common terminal P, and the first winding L1 and the second winding L2 are electrically connected to the positive electrode of the battery 10 through the first diode D1 and the third diode D3, respectively, so that the battery 10 is charged, and therefore, the current on the connection line between the first terminal of the first arm circuit 110 and the positive electrode of the battery 10 at this time flows from the first terminal of the first arm circuit 110 to the positive electrode of the battery 10. As is apparent from the above description of the charging phase, in the charging phase, the current on the motor lead wire flows from the positive electrode of the charging power supply 20 to the common terminal P, and the current on the connection line between the first terminal of the first arm circuit 110 and the positive electrode of the battery 10 flows from the first terminal of the first arm circuit 110 to the positive electrode of the battery 10, so that the current in the second electromagnet 113 also flows in both directions in the charging phase, and the second magnet ring 113 can be effectively prevented from being saturated, thereby ensuring the effect of the second magnet ring 113 in suppressing common mode interference.

The main positive switch S1, the main negative switch S2, the charging touch controller K1, the first switch element V1, the second switch element V2, the third switch element V3, the fourth switch element V4, the fifth switch element V5, and the sixth switch element V6 may be controlled by a controller (not shown). In other embodiments, during the energy storage phase, the controller may alternatively close the second switching element V2 and the fourth switching element V4, or alternatively close the first winding L1 and the second winding L2 to alternatively store energy, or alternatively store energy. When the first winding L1 and the second winding L2 store energy alternatively or alternatively, the operating principle of the power system is similar to that of storing energy simultaneously by the first winding L1 and the second winding L2, and the description thereof is omitted.

Wherein, the connector 14 is located between the main positive switch S1 and the motor controller 11, and is used for connecting the main positive switch S1 with the first end of the first switch element V1 in the motor controller 11a, and the connector 14 is located between the main negative switch S2 and the motor controller 11, and is also used for connecting the main negative switch S2 with the second end of the first switch element V1.

In the embodiment, when the power system is in the direct charging mode, the bypass contactor K2 is closed, the main negative switch S2 is closed, the main positive switch S2 is opened, the charging contactor K1 is opened, and the charging power supply 20 charges the battery 10 through the closed bypass contactor K2.

The application also provides a vehicle comprising the power system.

The power system and the vehicle can reduce common-mode interference through the first magnetic ring 12, and when the battery 10 is boosted and charged through the charging power supply 20 and the motor 13, the flowing direction of current on the third connecting line is opposite to that of current on the first connecting line, and/or the flowing direction of current on the third connecting line is opposite to that of current on the second connecting line, so that the effect of inhibiting common-mode interference due to the saturation of the first magnetic ring 12 can be avoided.

Through the above description of the embodiments, those skilled in the art will clearly understand that the functions or methods of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method of each embodiment of the present application.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.