CN113783407B - Power system and vehicle - Google Patents
Power system and vehicle Download PDFInfo
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- CN113783407B CN113783407B CN202111080177.3A CN202111080177A CN113783407B CN 113783407 B CN113783407 B CN 113783407B CN 202111080177 A CN202111080177 A CN 202111080177A CN 113783407 B CN113783407 B CN 113783407B
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- battery
- bridge arm
- arm circuit
- switching element
- winding
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Classifications
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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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Abstract
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 electrode of the battery is connected with the negative electrode of the charging power supply; the first ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit of the motor controller are connected with the positive electrode of the battery, and the second ends of the first bridge arm circuit, the second bridge arm circuit and the third bridge arm circuit are connected with the negative electrode of the battery; the winding of the motor is connected with the connecting end of the corresponding bridge arm circuit; the first end of the third winding is also connected with 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 connecting line is positioned at one side of the first magnetic ring close to the motor controller.
Description
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 automobiles, and become the first choice for purchasing automobiles by users.
The power system of the new energy electric automobile comprises a battery, a motor controller and a motor. Under the normal driving mode, the power system provides direct-current voltage by the battery, and the motor controller converts the direct-current voltage into alternating-current voltage to drive the motor to rotate. In the charging mode, the new energy electric automobile charges the battery by a charging power supply.
However, the existing power system can generate larger common-mode interference during operation, so that larger electromagnetic interference degree can be generated.
Disclosure of Invention
Aiming at the technical problems, the application provides a power system and a vehicle, which can reduce common mode interference.
In order to solve the technical problems, the application provides a power system which comprises a battery, a motor controller, a motor and a first magnetic ring. The battery comprises an anode and a cathode, and the cathode of the battery is connected with the cathode 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 connected with a 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 connected with a negative electrode 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 all penetrate through the first magnetic ring, the third connecting wire is connected with the positive electrode 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 at one side, close to the motor controller, of the first magnetic ring.
Optionally, when the battery is boosted by the charging power source and the motor, the current on the third connection line flows in the opposite direction to the current on the first connection line, and/or the current on the third connection line flows in the opposite direction to the 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. The first path 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 positive electrode of the battery, and the anode of the first diode is connected with the second path end of the first switching element. The first path end of the second switching element is connected with the 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 the second path end of the second switching element is used as the second end of the first bridge arm circuit to be connected with the negative electrode of the battery. The cathode of the second diode is connected with the first path end of the second switching element, and the anode of the second diode is connected with the cathode of the battery.
Optionally, the internal structure of the second bridge arm circuit and the internal structure of the third bridge arm circuit are the same as the 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 wire between the positive electrode of the battery and the first end of the first bridge arm circuit, sleeved on a connecting wire 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 stabilizing 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. 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. 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 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, and is positioned between the negative electrode of the battery and the second end of the first bridge arm circuit. The charging contactor is positioned between the positive pole of the charging power supply and the third winding.
Optionally, the power system further comprises a bypass contactor. The bypass contactor is located between the positive electrode of the battery and the positive electrode of the charging power supply.
The application also provides a vehicle comprising the power system.
As described above, the first connecting line, the second connecting line, and the third connecting line in the power system and the vehicle of the present application all pass through the first magnetic ring, the first end of the third winding is further connected to the positive pole of the charging power source through the motor outgoing line, and the common end of the motor outgoing line and the third connecting line is located at the 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, the power system and the vehicle can enable the current on the third connecting wire to flow in the opposite direction to the current on the first connecting wire and/or enable the current on the third connecting wire to flow in the opposite direction to the current on the second connecting wire when the battery is boosted and charged through the charging power supply and the motor, so that the effect of inhibiting 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 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 that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of a power system according to a first embodiment of the present application.
Fig. 2 is a schematic diagram of the structure and connection relationship of a power system according to a second embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments. Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying 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 element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the application may have the same meaning or may have different meanings, the particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. Fig. 1 is a schematic diagram 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. The motor controller 11 includes a first arm circuit 110, a second arm circuit 111, and a third arm 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 the 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 the negative electrode of the battery 10.
Specifically, in the present embodiment, the first bridge arm circuit 110 may include a first switching element V1 and a first diode D1, a second switching element V2 and a second diode D2. The second bridge arm circuit 111 may include a third switching element V3, a third diode D3, a fourth switching element V4, and a fourth diode D4. Third leg circuit 112 may include a fifth switching element V5, a fifth diode D5, a sixth switching element V6, and a sixth diode D6.
The first path end of the first switching element V1 is connected to the positive electrode of the battery 10 as a first end of the first bridge arm circuit 110, and the second path end of the first switching element V1 is connected to the first path end of the second switching element V2 and is connected to the motor 12 as a connection end u1 of the first bridge arm circuit 110. The cathode of the first diode D1 is connected to the positive electrode of the battery 10, and the anode of the first diode D1 is connected to the second path terminal of the first switching element V1. The second path terminal of the second switching element V2 is connected to the negative electrode of the battery 10 as the second terminal of the first arm circuit 110. The cathode of the second diode D2 is connected to the first path terminal of the second switching element V2, and the anode of the second diode D2 is connected to the cathode of the battery 10. The first path end of the third switching element V3 is connected to the positive electrode of the battery 10 as the first end of the second arm circuit 111, and the second path end of the third switching element V3 is connected to the first path end of the fourth switching element V4 and is connected to the motor 12 as the connection end u2 of the second arm circuit 111. The cathode of the third diode D3 is connected to the positive electrode of the battery 10, and the anode of the third diode D3 is connected to the second path terminal of the third switching element V3. The second path terminal of the fourth switching element V4 is connected to the negative electrode of the battery 10 as the second terminal of the second arm circuit 111. The cathode of the fourth diode D4 is connected to the first path terminal of the fourth switching element V4, and the anode of the fourth diode D4 is connected to the cathode of the battery 10. The first path end of the fifth switching element V5 is connected to the positive electrode of the battery 10 as the first end of the third arm circuit 112, and the second path end of the fifth switching element V5 is connected to the first path end of the sixth switching element V6 and is connected to the motor 12 as the connection end u3 of the third arm circuit 112. The cathode of the fifth diode D5 is connected to the positive electrode of the battery 10, and the 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 is connected to the negative electrode of the battery 10 as the second terminal of the third arm circuit 112. The cathode of the sixth diode D6 is connected to the first path terminal of the sixth switching element V6, and the anode of the sixth diode D6 is connected to the 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 enhanced insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBTs). The first pass ends 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 drain electrodes. The second 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 sources. In other embodiments, at least one 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 may be another type of switching element, such as an N-type Metal-Oxide-semiconductor field effect transistor (MOSFET).
The motor 13 includes a first winding L1, a second winding L2, and a third winding L3. The first end of the first winding L1 is connected to the connection end u1 of the first bridge arm circuit 110 through a first connection line, the first end of the second winding L2 is connected to the connection end u2 of the second bridge arm circuit 111 through a second connection line, the first end of the third winding L3 is connected to the connection end u3 of the third bridge arm circuit 112 through a third connection line, and the second end of the first winding L1 is connected to the second end of the second winding L2 and the second end of the third winding L3.
The first connecting line, the second connecting line and the third connecting line all pass through the first magnetic ring 12, the third connecting line is further connected with the positive electrode of the charging power supply 20 through a motor outgoing line, and the common end P of the third connecting line and the motor outgoing line is located at one side of the first magnetic ring 12 close to the motor controller 11.
In this embodiment, the power system may further include a main positive switch S1, a main negative switch S2, and a charging contactor K1. Wherein the main positive switch S1 is located between the positive electrode of the battery 10 and the first end of the first bridge arm circuit 110. The main negative switch S2 is located between the negative electrode of the battery 10 and the negative electrode of the charging power supply 20, and between the negative electrode of the battery 10 and the second end of the first bridge arm circuit 110. The charging contactor K1 is located between the positive electrode of the charging power supply 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 source 20 and the motor 13. The battery 10 is subjected to boost charging including an energy storage phase and a charging phase. In the energy storage stage, the charging contactor K1, the main positive switch S1 and the main negative switch S2 are all closed, 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 open state, the second switching element V2 and the fourth switching 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 switching 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 switching 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 in an f-off state, the second switching element V2 and the fourth switching element V4 are 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 is apparent from the above description, when the battery 10 is boosted and charged by the charging power source 20 and the motor 13, the charging current supplied by the charging power source 20 flows from the motor lead-out wire to the first end of the third winding L3 through the common end P of the motor lead-out wire and the third connecting wire, the current on the first connecting wire flows from the first end of the first winding L1 to the connection end u1 of the first bridge arm circuit 110, and the current on the second connecting wire flows from the first end of the second winding L2 to the connection end u2 of the second bridge arm circuit 111 in both the energy storage stage and the charging stage. Therefore, when the battery 10 is boosted and charged by the charging power supply 20 and the motor 13, the current on the third connection line flows in the opposite direction to the current on the first connection line, and the current on the third connection line flows in the opposite direction to the current on the second connection line, so that the current in the first magnetic ring 12 flows in two directions, the saturation of the first magnetic ring 12 can be effectively prevented, and the effect of inhibiting common-mode interference of the first magnetic ring 12 can be ensured.
The main positive switch S1, the main negative switch S2, the charging touch controller K1, 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 may be controlled by a controller (not shown in the figure). 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, so that energy storage is performed alternatively, or alternatively. When the first winding L1 and the second winding L2 alternatively store energy or alternately store energy, the working principle of the power system is similar to that of the first winding L1 and the second winding L2 which store energy simultaneously, and the description thereof is omitted.
When the power system is in the normal driving mode, the main positive switch S1 and the main negative switch S2 are closed, the charging contactor K1 is opened, 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 pulse width modulation signals 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 wire, the second connecting wire and the third connecting wire to drive the motor 13 to rotate. Because the first connecting wire, the second connecting wire and the third connecting wire all penetrate through the first magnetic ring 12, the first magnetic ring 12 can also play a role in reducing common mode interference when the power system is in a normal driving mode.
Specifically, 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 from a controller (not shown in the figure), so that the principle of converting the direct current provided by the battery 10 into three-phase alternating current is as follows: the first switching element V1 and the second switching element V2 in the first bridge arm circuit 110 are alternately closed, the third switching element V3 and the fourth switching element V4 in the second bridge arm circuit 111 are alternately closed, the fifth switching element V5 and the sixth switching element V6 in the third bridge arm circuit 112 are alternately closed, and the angles at which the first bridge arm circuit 110, the second bridge arm circuit 111 and the third bridge arm circuit 112 start conducting 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 the present embodiment can perform common mode filtering through the first magnetic ring 12 in both the normal driving mode and the boost charging mode, and the current in the first magnetic ring 12 flows in both the energy storage stage and the charging stage of the boost charging mode, so that the saturation of the first magnetic ring 12 can be effectively prevented, and the effect of the first magnetic ring 12 in suppressing the common mode interference can be ensured.
Fig. 2 is a schematic diagram of 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 contactor K1, and a bypass contactor K2.
The working principles 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 contactor K1 may be described in relation to the first embodiment, and will not be described herein.
In the present embodiment, the motor controller 11a includes a first arm circuit 110, a second arm circuit 111, a third arm circuit 112, a stabilizing capacitor C, a first safety capacitor Cx, a second safety capacitor Cy1, and a third safety capacitor Cy2. The working principles of the first bridge arm circuit 110, the second bridge arm circuit 111, and the third bridge arm circuit 112 may refer to the related descriptions of the first embodiment, and are not repeated herein. The stabilizing capacitor C is disposed between the positive electrode of the battery 10 and the negative electrode of the battery 10. The first safety capacitance Cx is provided between the positive electrode of the battery 10 and the negative electrode of the battery 10. The first end of the second safety capacitor Cy1 is connected to the positive electrode of the battery 10, and the second end 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 the present embodiment, the motor controller 11a further includes a second magnetic ring 113. The second magnetic ring 113 is sleeved on a connecting line between the positive electrode of the battery 10 and the first end of the first bridge arm circuit 110, and sleeved on a connecting line between the negative electrode of the battery 10 and the second end of the first bridge arm circuit 110, and sleeved on a motor lead-out wire.
When the power system is in the boost charging mode, the battery 10 is boosted and charged by the charging power source 20 and the motor 13. The battery 10 is subjected to boost charging including an energy storage phase and a charging phase.
Specifically, in 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 open 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 lead-out wire through the common terminal P into the third connecting wire, the current output by the first end of the first winding L1 flows into the negative electrode of the charging power supply 20 through the closed second switching element V2 from the second end of the first bridge arm circuit 110, the current output by the first end of the second winding L2 flows into the negative electrode of the charging power supply 20 through the closed fourth switching element V4 from the second end of the second bridge arm circuit 111, and the first winding L1 and the second winding L2 store energy.
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 source 20 to the common terminal P, and the current on the connection line between the second end of the first bridge arm circuit 110 and the negative electrode of the battery 10 flows from the second end of the first bridge arm circuit 110 to the negative electrode of the charging power source 20, so that the current in the second magnetic ring 113 also flows in two directions, and the saturation of the second magnetic ring 113 can be effectively prevented, so that the effect of the second magnetic ring 113 for suppressing the common mode interference can be ensured.
Specifically, in the charging stage, 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 outlet 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 bridge arm circuit 110 and the positive electrode of the battery 10 flows from the first terminal of the first bridge 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-out wire flows from the positive electrode of the charging power source 20 to the common terminal P, and the current on the connection line between the first end of the first bridge arm circuit 110 and the positive electrode of the battery 10 flows from the first end of the first bridge arm circuit 110 to the positive electrode of the battery 10, so that the current in the second electromagnetic ring 113 also flows in both directions in the charging phase, thereby effectively preventing the second magnetic ring 113 from being saturated, and ensuring the effect of the second magnetic ring 113 in suppressing the common mode interference.
The main positive switch S1, the main negative switch S2, the charging touch controller K1, 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 may be controlled by a controller (not shown in the figure). 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, so that energy storage is performed alternatively, or alternatively. When the first winding L1 and the second winding L2 alternatively store energy or alternately store energy, the working principle of the power system is similar to that of the first winding L1 and the second winding L2 which store energy simultaneously, 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 a first end of the first switching 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 a second end of the first switching element V1.
In this 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 a power system as described above.
The power system and the vehicle can reduce common mode interference through the first magnetic ring 12, and can enable the current flow on the third connecting wire to be opposite to the current flow on the first connecting wire and/or enable the current flow on the third connecting wire to be opposite to the current flow on the second connecting wire when the battery 10 is boosted and charged through the charging power supply 20 and the motor 13, so that the effect of inhibiting common mode interference caused by saturation of the first magnetic ring 12 can be avoided.
From the above description of the embodiments, it will be apparent to those skilled in the art that the functions or methods of the above embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, a controlled terminal, or a network device, etc.) to perform the method of each embodiment of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. The power system is characterized by comprising a battery, a motor controller, a first magnetic ring and a motor;
the battery comprises an anode and a cathode, and the cathode of the battery is connected with the cathode 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 connected with a 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 connected with a negative electrode 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 all penetrate through the first magnetic ring, the third connecting wire is connected with the positive electrode 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 at one side, close to the motor controller, of the first magnetic ring.
2. The power system of claim 1, wherein a flow of current on the third connection line is opposite to a flow of current on the first connection line and/or a flow of current on the third connection line is opposite to a flow of current on the second connection line when the battery is boost charged by the charging power source and the motor.
3. The power system of claim 1, wherein the first leg circuit includes a first switching element, a first diode, a second switching element, a second diode;
a first channel 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 positive electrode of the battery, and the anode of the first diode is connected with the second path end of the first switching element;
the first path end of the second switching element is connected with the 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 the second path end of the second switching element is used as the second end of the first bridge arm circuit to be connected with the negative electrode of the battery;
the cathode of the second diode is connected with the first path end of the second switching element, and the anode of the second diode is connected with the cathode of the battery.
4. The power 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 loop;
the second magnetic ring is sleeved on a connecting wire between the positive electrode of the battery and the first end of the first bridge arm circuit, sleeved on a connecting wire 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 power system of claim 1, wherein the motor controller further comprises a stabilizing capacitor;
the stabilizing 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;
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 contactor;
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 contactor is positioned between the positive pole of the charging power supply and the third winding.
9. The power system of claim 1, further comprising a bypass contactor;
the bypass contactor is located between the positive electrode of the battery and the positive electrode of the charging power supply.
10. A vehicle comprising a power system as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111080177.3A CN113783407B (en) | 2021-09-15 | 2021-09-15 | Power system and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111080177.3A CN113783407B (en) | 2021-09-15 | 2021-09-15 | Power system and vehicle |
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| CN113783407A CN113783407A (en) | 2021-12-10 |
| CN113783407B true CN113783407B (en) | 2023-09-12 |
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| CN115642823A (en) * | 2021-07-19 | 2023-01-24 | 华为技术有限公司 | Drive assembly and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341483A (en) * | 2019-07-24 | 2019-10-18 | 广州小鹏汽车科技有限公司 | A kind of detection system and detection method of electric vehicle motor controller |
| CN110661441A (en) * | 2018-06-28 | 2020-01-07 | 比亚迪汽车工业有限公司 | Electric automobile and motor controller for electric automobile |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661441A (en) * | 2018-06-28 | 2020-01-07 | 比亚迪汽车工业有限公司 | Electric automobile and motor controller for electric automobile |
| CN110341483A (en) * | 2019-07-24 | 2019-10-18 | 广州小鹏汽车科技有限公司 | A kind of detection system and detection method of electric vehicle motor controller |
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Address after: 510000 No.8 Songgang street, Cencun, Tianhe District, Guangzhou City, Guangdong Province Applicant after: GUANGZHOU XIAOPENG MOTORS TECHNOLOGY Co.,Ltd. Address before: 510000 No. 8, Songgang Avenue, Cencun, Tianhe District, Guangzhou, Guangdong Applicant before: GUANGZHOU XIAOPENG MOTORS TECHNOLOGY Co.,Ltd. |
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