Auxiliary power supply, electric control product and vehicle

Abstract

The utility model relates to an auxiliary power supply, an electric control product and a vehicle. The auxiliary power supply comprises a first transformer and a second transformer, and each of the first transformer and the second transformer comprises a plurality of first secondary circuits and a second secondary circuit; each first secondary side circuit is used for being connected with a corresponding driving chip so as to output driving voltage to the driving chip; the output end of the second secondary circuit of the first transformer is connected to the first node through a first reverse cut-off unit, and the output end of the second secondary circuit of the second transformer is connected to the first node through another first reverse cut-off unit; the first node is used for being connected with the digital signal processor so as to output voltage required by normal operation of the digital signal processor to the digital signal processor; therefore, normal operation of the electric control product can be ensured when the secondary side circuit is short-circuited.

Description

Technical Field

[0001] This application relates to the field of electronic control product technology, and in particular to an auxiliary power supply, electronic control product, and vehicle. Background Technology

[0002] Typical electrical control products include a three-phase full-bridge circuit, and an integrated auxiliary power supply, digital signal processor (DSP), and driver chip. The auxiliary power supply powers the DSP and driver chip, the DSP outputs a pulse width modulation (PWM) signal to the driver chip, and the driver chip controls the three-phase full-bridge circuit according to the PWM signal to output three-phase AC power to the motor.

[0003] In related technologies, the auxiliary power supply in electronic control products typically includes a transformer, which has multiple secondary circuits. When the electronic control product is working, these multiple secondary circuits supply power to the DSP and the driver chip respectively.

[0004] However, in related technologies, if a short circuit occurs in one of the secondary circuits of the transformer in the electronic control products, the entire transformer will become saturated, which will prevent the DSP and driver chip from being powered, thus affecting the normal operation of the electronic control products. Utility Model Content

[0005] Therefore, it is necessary to provide an auxiliary power supply, electronic control products, and vehicle that can ensure the normal operation of electronic control products when a short circuit occurs in the secondary circuit.

[0006] In a first aspect, embodiments of this application provide an auxiliary power supply, which includes a first transformer and a second transformer. Both the first transformer and the second transformer include multiple first secondary circuits and a second secondary circuit.

[0007] Each of the first secondary side circuits is used to connect to the corresponding driver chip to output a driving voltage to the driver chip;

[0008] The output terminal of the second secondary circuit of the first transformer is connected to the first node through a first reverse cutoff unit, and the output terminal of the second secondary circuit of the second transformer is connected to the first node through another first reverse cutoff unit; the first node is used to connect to the digital signal processor to output the voltage required for the normal operation of the digital signal processor.

[0009] In one embodiment, both the first transformer and the second transformer further include a third secondary circuit;

[0010] The output terminal of the third secondary circuit of the first transformer is connected to the second node through a second reverse cutoff unit, and the output terminal of the third secondary circuit of the second transformer is connected to the second node through another second reverse cutoff unit; the second node is used to connect the resolver circuit of the motor to output the voltage required for the normal operation of the resolver circuit.

[0011] In one embodiment, the first reverse cutoff unit and / or the second reverse cutoff unit includes a diode.

[0012] In one embodiment, the third secondary circuit includes a third secondary winding and a first rectifier module connected to the third secondary winding.

[0013] In one embodiment, the second secondary circuit includes a second secondary winding and a first rectifier module connected to the second secondary winding.

[0014] In one embodiment, the first rectifier module includes a first rectifier unit and a first dummy load unit;

[0015] The input terminal of the first rectifier unit is used to connect to the secondary winding, and the output terminal of the first rectifier unit is connected to the first dummy load unit.

[0016] In one embodiment, both the first transformer and the second transformer include three first secondary circuits;

[0017] The three first secondary circuits of the first transformer are respectively used to connect to the driving chips for driving the three-phase upper bridge arms in the three-phase full-bridge circuit.

[0018] The three first secondary circuits of the second transformer are respectively used to connect to the drive chips for driving the three-phase lower bridge arms in the three-phase full-bridge circuit.

[0019] In one embodiment, the first secondary circuit includes a first secondary winding and a drive power output module connected to the first secondary winding;

[0020] The drive power output module includes a second rectifier unit, a bypass capacitor unit, and a second dummy load unit. The input terminal of the second rectifier unit is used to connect to the secondary winding, and the output terminal of the second rectifier unit is connected to the second dummy load unit through the bypass capacitor unit.

[0021] In one embodiment, both the first transformer and the second transformer further include a primary-side circuit, which includes a primary-side winding and a primary-side power processing module connected to the primary-side winding.

[0022] Secondly, embodiments of this application also provide an electronic control product, including a driver chip, a digital signal processor, a three-phase full-bridge circuit, and an auxiliary power supply as described in the first aspect; wherein the three-phase full-bridge circuit is connected to the driver chip and is used to connect a motor.

[0023] Thirdly, embodiments of this application also provide a vehicle, including a motor and the electronic control product described in the second aspect.

[0024] In the aforementioned auxiliary power supply, electronic control products, and vehicles, the auxiliary power supply includes a first transformer and a second transformer. Both the first and second transformers include multiple first secondary circuits and one second secondary circuit. Each first secondary circuit is used to connect to a corresponding driver chip to output a drive voltage to the driver chip. The driver chip drives the corresponding bridge arm in the three-phase full-bridge circuit based on the drive voltage.

[0025] The output terminal of the second secondary circuit of the first transformer is connected to the first node through a first reverse cutoff unit, and the output terminal of the second secondary circuit of the second transformer is connected to the first node through another first reverse cutoff unit. The first node is used to connect to the digital signal processor (DSP) to output the voltage required for the DSP's normal operation. Thus, if a short circuit occurs in either the first or second transformer's secondary circuit, only the transformer belonging to that short-circuited secondary circuit will fail to operate normally, while the transformer without a short circuit will continue to operate normally. The transformer continuing to operate normally will continue to output the voltage required for the DSP's normal operation, ensuring the DSP continues to operate normally. The continued normal operation of the DSP enables active short circuit (ASC) protection for the motor, thereby ensuring the normal operation of the electronic control product. Simultaneously, the auxiliary power supply is composed of the first and second transformers, which facilitates a distributed layout of the auxiliary power supply within the electronic control product, thus improving its layout flexibility. Furthermore, since the auxiliary power supply in this embodiment does not require an additional circuit specifically for powering the DSP, the auxiliary power supply is low in cost, simple in structure, easy to implement, and highly practical. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is one of the schematic diagrams of the auxiliary power supply in one embodiment;

[0028] Figure 2 This is a second schematic diagram of the auxiliary power supply structure in one embodiment;

[0029] Figure 3 This is the third schematic diagram of the auxiliary power supply in one embodiment;

[0030] Figure 4 This is the fourth schematic diagram of the auxiliary power supply structure in one embodiment;

[0031] Figure 5 This is the fifth schematic diagram of the auxiliary power supply in one embodiment;

[0032] Figure 6 This is one of the structural schematic diagrams of the first rectifier module in one embodiment;

[0033] Figure 7 This is a second schematic diagram of the structure of the first rectifier module in one embodiment;

[0034] Figure 8 This is a schematic diagram of the auxiliary power supply structure in one embodiment;

[0035] Figure 9 This is one of the structural schematic diagrams of a drive power output module according to an embodiment;

[0036] Figure 10 This is a second schematic diagram of the structure of a drive power output module according to one embodiment;

[0037] Figure 11 This is the seventh schematic diagram of the auxiliary power supply structure in one embodiment;

[0038] Figure 12 This is a schematic diagram of the primary-side power processing module according to one embodiment.

[0039] Explanation of reference numerals in the attached figures:

[0040] 10-First transformer, 20-Second transformer, 310-First secondary circuit, 320-Second secondary circuit, 330-Third secondary circuit, 340-Primary circuit, 40-First reverse cutoff unit, 50-Second reverse cutoff unit, 610-Second secondary winding, 620-Third secondary winding, 630-First rectifier module, 640-First secondary winding, 650-Drive power output module, 660-Primary winding, 670-Primary power processing module, 6301-First rectifier unit, 6302-First dummy load unit, 6501-Second rectifier unit, 6502-Second dummy load unit, 6503-Bypass capacitor unit. Detailed Implementation

[0041] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0043] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0044] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0045] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0046] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0047] In one exemplary embodiment, reference is made to Figure 1An auxiliary power supply is provided, which includes a first transformer 10 and a second transformer 20. Both the first transformer 10 and the second transformer 20 include multiple first secondary circuits 310 and a second secondary circuit 320. In this embodiment, both the first transformer 10 and the second transformer 20 may also include a primary circuit 340. The secondary circuit is relative to the primary circuit 340. The primary circuit 340 includes at least a primary winding and is used to receive voltage signals; the secondary circuit includes at least a secondary winding and is used to output voltage signals.

[0048] Based on this, each first secondary-side circuit 310 is used to connect to a corresponding driver chip to output a drive voltage to the driver chip. For example, each first secondary-side circuit 310 is used to connect to a corresponding driver chip in an electronic control product to output a drive voltage to the driver chip. The three-phase full-bridge circuit in the electronic control product includes multiple bridge arms, which typically include Insulated Gate Bipolar Transistors (IGBTs). When the driver chip receives a PWM signal from the DSP, it drives the corresponding bridge arm's IGBT to turn on or off based on the drive voltage. The drive voltage is, for example, +16V and -7V. In this embodiment, all drive voltages used to drive all bridge arms in the three-phase full-bridge circuit of the electronic control product are output from some or all of the first secondary-side circuits 310 in the auxiliary power supply.

[0049] The output terminal of the second secondary circuit 320 of the first transformer 10 is connected to the first node E through a first reverse cutoff unit 40, and the output terminal of the second secondary circuit 320 of the second transformer 20 is connected to the first node E through another first reverse cutoff unit 40. The first node E is used to connect to a digital signal processor to output the voltage required for the normal operation of the digital signal processor. For example, the first node E is used to connect to a digital signal processor in an electronic control product to output the voltage required for the normal operation of the digital signal processor.

[0050] The voltage required for the normal operation of the digital signal processor is, for example, +5V. The first reverse cutoff unit 40 is characterized by forward conduction and reverse cutoff. That is, the voltage output from the second secondary circuit 320 of the first transformer 10 and the voltage output from the second secondary circuit 320 of the second transformer 20 can be converged at the first node E and then output to the digital signal processor; the first reverse cutoff unit 40 can prevent the voltage output from the second secondary circuit 320 of the first transformer 10 from flowing to the output terminal of the second secondary circuit 320 of the second transformer 20, and also prevent the voltage output from the second secondary circuit 320 of the second transformer 20 from flowing to the output terminal of the second secondary circuit 320 of the first transformer 10.

[0051] Thus, either the second secondary circuit 320 of the first transformer 10 or the second secondary circuit 320 of the second transformer 20 can output the voltage required for the normal operation of the digital signal processor. Therefore, when the first transformer 10 fails to operate normally due to a short circuit in its secondary circuit, the second transformer 20 can still operate normally, outputting the voltage required for the normal operation of the digital signal processor to the first node E through its second secondary circuit 320, ensuring the continued normal operation of the digital signal processor. The continued normal operation of the digital signal processor enables ASC protection for the motor. Similarly, when the second transformer 20 fails to operate normally due to a short circuit in its secondary circuit, the first transformer 10 can still operate normally, outputting the voltage required for the normal operation of the digital signal processor to the first node E through its second secondary circuit 320, also ensuring the continued normal operation of the digital signal processor.

[0052] In this embodiment, the auxiliary power supply is composed of a first transformer 10 and a second transformer 20, which is beneficial for the auxiliary power supply to be distributed within the electronic control product, thus improving its layout flexibility. Furthermore, since the auxiliary power supply in this embodiment does not require the introduction of additional circuitry specifically for powering the digital signal processor, the auxiliary power supply is low in cost, simple in structure, easy to implement, and highly practical.

[0053] In one exemplary embodiment, reference is made to Figure 2 Both the first transformer 10 and the second transformer 20 also include a third secondary circuit 330. The output terminal of the third secondary circuit 330 of the first transformer 10 is connected to the second node F through a second reverse cutoff unit 50, and the output terminal of the third secondary circuit 330 of the second transformer 20 is connected to the second node F through another second reverse cutoff unit 50; the second node F is used to connect the resolver circuit of the motor to output the voltage required for the normal operation of the resolver circuit.

[0054] The voltage required for the normal operation of the resolver circuit is, for example, +12V. The second reverse cutoff unit 50 is characterized by forward conduction and reverse cutoff. That is, the voltage output from the third secondary circuit 330 of the first transformer 10 and the voltage output from the third secondary circuit 330 of the second transformer 20 can be combined at the second node F and then output to the resolver circuit; the second reverse cutoff unit 50 can prevent the voltage output from the third secondary circuit 330 of the first transformer 10 from flowing to the output terminal of the third secondary circuit 330 of the second transformer 20, and also prevent the voltage output from the third secondary circuit 330 of the second transformer 20 from flowing to the output terminal of the third secondary circuit 330 of the first transformer 10.

[0055] Thus, either the third secondary circuit 330 of the first transformer 10 or the third secondary circuit 330 of the second transformer 20 can output the voltage required for the normal operation of the resolver circuit. Therefore, when the first transformer 10 fails to operate normally due to a short circuit in its secondary circuit, the second transformer 20 can still operate normally, and the third secondary circuit 330 of the second transformer 20 outputs the voltage required for the normal operation of the resolver circuit to the second node F, ensuring that the resolver circuit continues to operate normally. Similarly, when the second transformer 20 fails to operate normally due to a short circuit in its secondary circuit, the first transformer 10 can still operate normally, and the third secondary circuit 330 of the first transformer 10 outputs the voltage required for the normal operation of the resolver circuit to the second node F, also ensuring that the resolver circuit continues to operate normally.

[0056] In one exemplary embodiment, reference is made to Figure 3 The first reverse cutoff unit 40 and / or the second reverse cutoff unit 50 include diodes, making the structure of the first reverse cutoff unit 40 and / or the second reverse cutoff unit 50 simple, easy to implement, low in cost, and highly practical. The anode of the diode is used to connect to the output terminal of the secondary circuit, and the cathode of the diode is used to connect to the node. The diode is, for example, a Schottky diode.

[0057] In one exemplary embodiment, reference is made to Figure 3 The first transformer 10 and the second transformer 20 each include three first secondary circuits 310; the three first secondary circuits 310 of the first transformer 10 are respectively used to connect to the driving chip in the electrical control product for driving the three-phase upper bridge arm in the three-phase full-bridge circuit; the three first secondary circuits 310 of the second transformer 20 are respectively used to connect to the driving chip in the electrical control product for driving the three-phase lower bridge arm in the three-phase full-bridge circuit.

[0058] The three-phase full-bridge circuit in the electronic control product includes three-phase upper bridge arms (U-phase upper bridge arm, V-phase upper bridge arm, W-phase upper bridge arm) and three-phase lower bridge arms (U-phase lower bridge arm, V-phase lower bridge arm, W-phase lower bridge arm), for a total of six bridge arms. Each bridge arm includes an IGBT. The U-phase upper bridge arm is connected to the U-phase lower bridge arm, the V-phase upper bridge arm is connected to the V-phase lower bridge arm, and the W-phase upper bridge arm is connected to the W-phase lower bridge arm.

[0059] For example, the driving voltage (+16V and -7V) output by the first secondary circuit 310 of the first transformer 10 can be used to drive the IGBT of the upper arm of the U phase to turn on or off, the driving voltage (+16V and -7V) output by the second secondary circuit 310 of the first transformer 10 can be used to drive the IGBT of the upper arm of the V phase to turn on or off, and the driving voltage (+16V and -7V) output by the third secondary circuit 310 of the first transformer 10 can be used to drive the IGBT of the upper arm of the W phase to turn on or off. The driving voltage (+16V and -7V) output by the first secondary circuit 310 of the second transformer 20 can be used to drive the IGBT of the lower arm of the U phase to turn on or off. The driving voltage (+16V and -7V) output by the second secondary circuit 310 of the second transformer 20 can be used to drive the IGBT of the lower arm of the V phase to turn on or off. The driving voltage (+16V and -7V) output by the third secondary circuit 310 of the second transformer 20 can be used to drive the IGBT of the lower arm of the W phase to turn on or off.

[0060] It is understood that the driving voltages output by the three first secondary circuits 310 of the second transformer 20 can be used to drive the IGBTs of the three-phase upper bridge arm to turn on or off, and the driving voltages output by the three first secondary circuits 310 of the first transformer 10 can be used to drive the IGBTs of the three-phase lower bridge arm to turn on or off. This application embodiment does not limit this.

[0061] In one exemplary embodiment, reference is made to Figure 4 The second secondary circuit 320 includes a second secondary winding 610 and a first rectifier module 630 connected to the second secondary winding 610. The first rectifier module 630 in the second secondary circuit 320 is used to output the voltage required for the normal operation of the digital signal processor.

[0062] In one exemplary embodiment, reference is made to Figure 5 The third secondary circuit 330 includes a third secondary winding 620 and a first rectifier module 630 connected to the third secondary winding 620. The first rectifier module 630 in the third secondary circuit 330 is used to output the voltage required for the normal operation of the resolver circuit. The specific values ​​of the electrical parameters of the components in the first rectifier module 630 in the third secondary circuit 330 may differ from the specific values ​​of the electrical parameters of the components in the first rectifier module 630 in the second secondary circuit 320.

[0063] In one exemplary embodiment, reference is made to Figure 6The first rectifier module 630 includes a first rectifier unit 6301 and a first dummy load unit 6302; the input terminal of the first rectifier unit 6301 is connected to the secondary winding, and the output terminal of the first rectifier unit 6301 is connected to the first dummy load unit 6302. This makes the structure of the first rectifier module 630 simple.

[0064] In one exemplary embodiment, reference is made to Figure 7 The first rectifier unit 6301 includes a first diode D1 and a first capacitor C1, and the first dummy load unit 6302 includes a first resistor R1. This further simplifies the structure of the first rectifier module 630. For example, the anode of the first diode D1 is connected to a first terminal of the secondary winding, the cathode of the first diode D1 is connected to a first terminal of the first capacitor C1, the second terminal of the first capacitor C1 is connected to a second terminal of the secondary winding, the second terminal of the secondary winding is connected to a reference ground, the first terminal of the first resistor R1 is connected to the cathode of the first diode D1, and the second terminal of the first resistor R1 is connected to the second terminal of the first capacitor C1. For example, the first diode D1 is a Schottky diode, which performs the rectification function.

[0065] It is understandable that the specific values ​​of the capacitance value of the first capacitor C1 and the resistance value of the first resistor R1 in the first rectifier module 630 of the third secondary circuit 330 can be different from or the same as the specific values ​​of the capacitance value of the first capacitor C1 and the resistance value of the first resistor R1 in the first rectifier module 630 of the second secondary circuit 320.

[0066] In one exemplary embodiment, reference is made to Figure 8 The first secondary circuit 310 includes a first secondary winding 640 and a drive power output module 650 connected to the first secondary winding 640. The drive power output module 650 in the first secondary circuit 310 is used for driving voltage.

[0067] In one exemplary embodiment, reference is made to Figure 9 The drive power output module 650 includes a second rectifier unit 6501, a bypass capacitor unit 6503, and a second dummy load unit 6502. The input terminal of the second rectifier unit 6501 is connected to the secondary winding, and the output terminal of the second rectifier unit 6501 is connected to the second dummy load unit 6502 through the bypass capacitor unit 6503. This simplifies the structure of the drive power output module 650.

[0068] In one exemplary embodiment, reference is made to Figure 10The second rectifier unit 6501 includes a second diode D2, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4; the bypass capacitor unit 6503 includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, and an eighth capacitor C8; the second dummy load unit 6502 includes a third diode D3, a second resistor R2, a third resistor R3, and a fourth resistor R4. This further simplifies the structure of the drive power output module 650.

[0069] For example, the second diode D2 is a Schottky diode, which serves as a rectifier; the third diode D3 is a Zener diode, which serves as a voltage regulator.

[0070] In one exemplary embodiment, reference is made to Figure 11 The first transformer 10 and the second transformer 20 both include a primary circuit 340, which includes a primary winding 660 and a primary power processing module 670 connected to the primary winding 660.

[0071] For example, refer to Figure 12 The primary-side power processing module 670 may include a power chip, an RCD unit (the RCD unit includes circuit components such as resistors, capacitors and diodes), a driving MOS unit, and a filtering unit. The RCD unit includes circuit components such as resistors, capacitors and diodes. By configuring the power chip, the voltage signal output to the secondary winding can be configured. For example, the first rectifier module 630 in the third secondary circuit 330 can be configured to output a +12V voltage, and the first rectifier module 630 in the second secondary circuit 320 can be configured to output a +5V voltage. Furthermore, when the digital signal processor requires higher precision for the +5V supply voltage, the power supply chip can be configured so that the first rectifier module 630 in the second secondary circuit 320 outputs approximately +6V. In this way, the first rectifier module 630 in the second secondary circuit 320 of the first transformer 10 outputs approximately +6V to the first node E, and the first rectifier module 630 in the second secondary circuit 320 of the first transformer 20 outputs approximately +6V to the first node E. The approximately +6V voltage at the first node E can then pass through a low dropout regulator (LDO) to output a higher precision +5V voltage to the digital signal processor.

[0072] In an exemplary embodiment, the auxiliary power supply of this application embodiment can adopt a six-layer PCB board structure in practical applications. The first and sixth PCB boards in the six-layer PCB board structure are used to set the primary circuit 340 of the first transformer 10 and the primary circuit 30 of the second transformer 20, respectively. The second to fourth PCB boards in the six-layer PCB board structure can be used to set the first secondary circuit 310 of each of the first transformer 10 and the second transformer 20. The fifth PCB board in the six-layer PCB board structure can be used to set the second secondary circuit 320 and the third secondary circuit 330 of the first transformer 10 and the second transformer 20. Thus, compared with the auxiliary power supplies of related electronic control products, the auxiliary power supply structure of this application embodiment is simple, easy to implement, low in cost, and highly practical.

[0073] Based on the same inventive concept, this application also provides an electronic control product, which includes a driver chip, a digital signal processor, a three-phase full-bridge circuit, and an auxiliary power supply provided in any of the above embodiments; wherein, the three-phase full-bridge circuit is connected to the driver chip and is used to connect to the motor.

[0074] The electrical control product and auxiliary power supply provided in this embodiment of the utility model belong to the same utility model concept, can solve the same technical problem, and thus achieve the same technical effect. Repeated content will not be repeated here.

[0075] Based on the same inventive concept, this application also provides a vehicle, which includes a motor and an electronic control product as described in the above embodiments.

[0076] The vehicle and auxiliary power supply provided in this embodiment of the utility model belong to the same utility model concept, can solve the same technical problem, and thus achieve the same technical effect. Repeated content will not be repeated here.

[0077] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An auxiliary power supply, characterized in that, The auxiliary power supply includes a first transformer and a second transformer, and both the first transformer and the second transformer include multiple first secondary circuits and a second secondary circuit. Each of the first secondary side circuits is used to connect to the corresponding driver chip to output a driving voltage to the driver chip; The output terminal of the second secondary circuit of the first transformer is connected to the first node through a first reverse cutoff unit, and the output terminal of the second secondary circuit of the second transformer is connected to the first node through another first reverse cutoff unit; the first node is used to connect to the digital signal processor to output the voltage required for the normal operation of the digital signal processor.

2. The auxiliary power supply according to claim 1, characterized in that, Both the first transformer and the second transformer also include a third secondary circuit; The output terminal of the third secondary circuit of the first transformer is connected to the second node through a second reverse cutoff unit, and the output terminal of the third secondary circuit of the second transformer is connected to the second node through another second reverse cutoff unit; the second node is used to connect the resolver circuit of the motor to output the voltage required for the normal operation of the resolver circuit.

3. The auxiliary power supply according to claim 2, characterized in that, The first reverse cutoff unit and / or the second reverse cutoff unit include a diode.

4. The auxiliary power supply according to claim 2, characterized in that, The third secondary circuit includes a third secondary winding and a first rectifier module connected to the third secondary winding.

5. The auxiliary power supply according to claim 1, characterized in that, The second secondary circuit includes a second secondary winding and a first rectifier module connected to the second secondary winding.

6. The auxiliary power supply according to claim 4 or 5, characterized in that, The first rectifier module includes a first rectifier unit and a first dummy load unit; The input terminal of the first rectifier unit is used to connect to the secondary winding, and the output terminal of the first rectifier unit is connected to the first dummy load unit.

7. The auxiliary power supply according to any one of claims 1-5, characterized in that, Both the first transformer and the second transformer include three first secondary circuits; The three first secondary circuits of the first transformer are respectively used to connect to the driving chips for driving the three-phase upper bridge arms in the three-phase full-bridge circuit. The three first secondary circuits of the second transformer are respectively used to connect to the drive chips for driving the three-phase lower bridge arms in the three-phase full-bridge circuit.

8. The auxiliary power supply according to any one of claims 1-5, characterized in that, The first secondary circuit includes a first secondary winding and a drive power output module connected to the first secondary winding; The drive power output module includes a second rectifier unit, a bypass capacitor unit, and a second dummy load unit. The input terminal of the second rectifier unit is used to connect to the secondary winding, and the output terminal of the second rectifier unit is connected to the second dummy load unit through the bypass capacitor unit.

9. The auxiliary power supply according to any one of claims 1-5, characterized in that, Both the first transformer and the second transformer further include a primary circuit, which includes a primary winding and a primary power processing module connected to the primary winding.

10. An electronically controlled product, characterized in that, It includes a driver chip, a digital signal processor, a three-phase full-bridge circuit, and an auxiliary power supply as described in any one of claims 1-9; wherein the three-phase full-bridge circuit is connected to the driver chip and is used to connect to the motor.

11. A vehicle, characterized in that, Includes motors and electronic control products as described in claim 10.

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