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 primary side circuit and a plurality of first secondary side circuits; each first secondary side circuit comprises a first secondary side winding, a rectification module and a voltage division module; wherein the input end of the rectification module is connected with the first secondary winding, the output end of the rectification module is connected with the input end of the voltage division module, and the output end of the voltage division module is connected to a corresponding bridge arm in the three-phase full-bridge circuit through the driving chip; the voltage dividing module is used for outputting multiple groups of different driving voltage signals to the driving chip according to the voltage output by the rectifying module, and the multiple groups of different driving voltage signals are used for driving power devices in the corresponding bridge arms; therefore, the number of the secondary windings is greatly reduced, the size of the auxiliary power supply is reduced, and the auxiliary power supply can be conveniently arranged and wired in an electric control product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control products, in particular to an auxiliary power supply, an electric control product and a vehicle. BACKGROUND

[0002] A general electric control product includes a three-phase full-bridge circuit, and an auxiliary power supply, a digital signal processor (DSP) and a driver chip are integrated. The auxiliary power supply supplies power to the DSP and provides a driving voltage signal to the driver chip. The DSP outputs a pulse width modulation (PWM) signal to the driver chip. The driver chip controls the three-phase full-bridge circuit according to the PWM signal to output three-phase alternating current to the motor.

[0003] In related technologies, the three-phase full-bridge circuit in the electric control product includes three-phase upper bridge arms and three-phase lower bridge arms, a total of six bridge arms, each bridge arm includes a power tube parallel structure composed of MOSFET (Metal Oxide Semiconductor Field Effect Transistor) and IGBT (Insulate Gate Bipolar Transistor). In the case that the auxiliary power supply in the electric control product is a transformer and the transformer is provided with multiple secondary winding groups, when the electric control product is working, each bridge arm is provided with a driving voltage signal through three secondary winding groups. Therefore, the six bridge arms are provided with corresponding secondary winding groups to provide driving voltage signals, which results in too many secondary winding groups of the transformer, too large volume of the transformer, and difficulty in internal layout and wiring of the transformer in the electric control product. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide an auxiliary power supply with less secondary winding groups, an electric control product and a vehicle.

[0005] In a first aspect, an embodiment of the present application provides an auxiliary power supply, which includes one primary winding circuit and multiple first secondary winding circuits.

[0006] Each first secondary winding circuit includes a first secondary winding, a rectifier module and a voltage divider module. The input end of the rectifier module is connected with the first secondary winding, the output end of the rectifier module is connected with the input end of the voltage divider module, and the output end of the voltage divider module is connected to the corresponding bridge arm in the three-phase full-bridge circuit through a driver chip.

[0007] The voltage dividing module is configured to output a plurality of different driving voltage signals to the driving chip according to the voltage output by the rectifying module, and the plurality of different driving voltage signals are used to drive the power devices in the corresponding bridge arms.

[0008] In one of the embodiments, the voltage dividing module comprises a first voltage dividing unit and a second voltage dividing unit.

[0009] The input end of the first voltage dividing unit is connected to the output end of the rectifying module, the output end of the first voltage dividing unit is connected to the corresponding bridge arm through the driving chip, and the first voltage dividing unit is configured to output a first group of driving voltage signals to the driving chip according to the voltage output by the rectifying module, and the first group of driving voltage signals are used to drive the first switch tube in the corresponding bridge arm.

[0010] The input end of the second voltage dividing unit is connected to the output end of the rectifying module, the output end of the second voltage dividing unit is connected to the bridge arm connected by the first voltage dividing unit through the driving chip, and the second voltage dividing unit is configured to output a second group of driving voltage signals to the driving chip according to the voltage output by the rectifying module, and the second group of driving voltage signals are used to drive the second switch tube in the corresponding bridge arm.

[0011] In one of the embodiments, the first switch tube and the second switch tube are different types of switch tubes.

[0012] In one of the embodiments, the first voltage dividing unit comprises a first voltage stabilizing subunit, a first dummy load subunit and a first bypass capacitor subunit.

[0013] The first voltage stabilizing subunit and the first dummy load subunit are both connected to the output end of the rectifying module, the first voltage stabilizing subunit is connected to the first dummy load subunit, and the first bypass capacitor subunit is connected to the first voltage stabilizing subunit and the first dummy load subunit.

[0014] In one of the embodiments, the first voltage stabilizing subunit is configured to output a first driving voltage signal in the first group of driving voltage signals according to the voltage output by the rectifying module, and the first dummy load subunit is configured to output a second driving voltage signal in the first group of driving voltage signals according to the voltage output by the rectifying module.

[0015] In one of the embodiments, a damping resistor subunit is arranged between the first voltage stabilizing subunit and the output end of the rectifying module, and / or between the first dummy load subunit and the output end of the rectifying module.

[0016] In one of the embodiments, the second voltage dividing unit comprises a second voltage stabilizing subunit, a second dummy load subunit and a second bypass capacitor subunit.

[0017] The second voltage stabilizing subunit and the second dummy load subunit are connected with the output end of the rectifier module, the second voltage stabilizing subunit is connected with the second dummy load subunit, and the second bypass capacitor subunit is connected with the second voltage stabilizing subunit and the second dummy load subunit.

[0018] The second voltage stabilizing subunit is configured to output a third driving voltage signal in the second group of driving voltage signals according to the voltage output by the rectifier module, and the second dummy load subunit is configured to output a fourth driving voltage signal in the second group of driving voltage signals according to the voltage output by the rectifier module.

[0019] In one of the embodiments, a damping resistor subunit is arranged between the second voltage stabilizing subunit and the output end of the rectifier module and / or between the second dummy load subunit and the output end of the rectifier module.

[0020] In one of the embodiments, the rectifier module includes a rectifier diode subunit and a rectifier capacitor subunit.

[0021] The input end of the rectifier diode subunit is connected with the first end of the first secondary winding, the output end of the rectifier diode subunit is connected with the first end of the rectifier capacitor subunit, and the second end of the rectifier capacitor subunit is connected with the second end of the first secondary winding.

[0022] In one of the embodiments, the auxiliary power supply includes six first secondary circuits, and the output end of the voltage dividing module of each first secondary circuit is connected to a corresponding bridge arm of the three-phase full-bridge circuit through the driving chip.

[0023] In one of the embodiments, the auxiliary power supply further includes a second secondary circuit, and the second secondary circuit is configured to connect a resolver circuit of a motor to output a feedback power supply to the resolver circuit.

[0024] In a second aspect, the embodiments of the present application further provide an electric control product, which includes a driving chip, 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 with the driving chip and is configured to connect a motor.

[0025] In a third aspect, the embodiments of the present application further provide a vehicle, which includes a motor and an electric control product as described in the second aspect.

[0026] The auxiliary power supply, the electric control product and the vehicle, the auxiliary power supply includes a primary side circuit and a plurality of first secondary side circuits, each secondary side circuit includes a first secondary side winding, a rectification module and a voltage division module. In each first secondary side circuit, the input end of the rectification module is connected with the first secondary side winding, the output end of the rectification module is connected with the input end of the voltage division module, and the output end of the voltage division module is connected to a corresponding bridge arm in the three-phase full-bridge circuit through a driving chip; wherein the voltage division module is used for outputting a plurality of different driving voltage signals to the driving chip according to the voltage output by the rectification module, and the plurality of different driving voltage signals are used for driving the power devices in the corresponding bridge arm.

[0027] Therefore, only one first secondary side circuit can provide the plurality of different driving voltage signals required for driving one bridge arm, that is, each bridge arm only corresponds to one first secondary side circuit to provide driving voltage signals, and thus the six bridge arms of the three-phase full-bridge circuit only need to be provided with driving voltage signals through six first secondary side circuits, thereby greatly reducing the number of secondary side windings, reducing the volume of the auxiliary power supply, facilitating the internal layout and wiring of the auxiliary power supply in the electric control product, and at the same time, since the auxiliary power supply provided by the embodiment of the application only includes one primary side circuit, the cost of the auxiliary power supply is low, and the practicability is strong. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0029] Figure 1 Structure schematic view of the auxiliary power supply of the electric control product of an embodiment;

[0030] Figure 2 Connection schematic view of the auxiliary power supply of the electric control product of an embodiment;

[0031] Figure 3 Structure schematic view of the voltage division module of an embodiment;

[0032] Figure 4 Structure schematic view of the first voltage division unit of an embodiment;

[0033] Figure 5 Structure schematic view of the first voltage division unit of an embodiment;

[0034] Figure 6A Structure schematic view of the first voltage division unit of an embodiment;

[0035] Figure 6B Figure 4 is a schematic diagram of a structure of a first voltage dividing unit according to an embodiment;

[0036] Figure 6C Figure 5 is a schematic diagram of a structure of a first voltage dividing unit according to an embodiment;

[0037] Figure 7 Figure 1 is a schematic diagram of a structure of a second voltage dividing unit according to an embodiment;

[0038] Figure 8 Figure 2 is a schematic diagram of a structure of a second voltage dividing unit according to an embodiment;

[0039] Figure 9A Figure 3 is a schematic diagram of a structure of a second voltage dividing unit according to an embodiment;

[0040] Figure 9B Figure 4 is a schematic diagram of a structure of a second voltage dividing unit according to an embodiment;

[0041] Figure 9C Figure 5 is a schematic diagram of a structure of a second voltage dividing unit according to an embodiment;

[0042] Figure 10 Figure 1 is a schematic diagram of a structure of a rectifier module according to an embodiment;

[0043] Figure 11 Figure 2 is a schematic diagram of a structure of a rectifier module according to an embodiment;

[0044] Figure 12 Figure 2 is a schematic diagram of a structure of an auxiliary power supply of an electrically controlled product according to an embodiment;

[0045] Figure 13 Figure 1 is a schematic diagram of a structure of a second secondary circuit according to an embodiment;

[0046] Figure 14A Figure 1 is a schematic diagram of a structure of a primary circuit according to an embodiment;

[0047] Figure 14B Figure 1 is a schematic diagram of a structure of a primary circuit according to an embodiment; Figure 14A Figure 1 is a schematic diagram of a structure of a primary circuit according to an embodiment;

[0048] BRIEF DESCRIPTION OF THE DRAWINGS

[0049] 10-primary side circuit, 110-primary side winding, 20-first secondary side circuit, 30-second secondary side circuit, 210-first secondary side winding, 220-rectification module, 230-voltage division module, 231-first voltage division unit, 232-second voltage division unit, 2311-first voltage stabilizing subunit, 2312-first dummy load subunit, 2313-first bypass capacitor subunit, 240-damping resistance subunit, 2321-second voltage stabilizing subunit, 2322-second dummy load subunit, 2323-second bypass capacitor subunit, 221-rectification diode unit, 222-rectification capacitor unit, 310-second secondary side winding. DETAILED DESCRIPTION

[0050] For the purpose of clarity, the present application will be described in greater detail below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0051] 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0052] It can be understood that the terms "first", "second", and the like used herein are used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. For example, without departing from the scope of the present application, a first resistor can be referred to as a second resistor, and similarly, a second resistor can be referred to as a first resistor. The first resistor and the second resistor are both resistors, but they are not the same resistor.

[0053] It can be understood that "connection" in the following embodiments, if the circuits, modules, units, etc. connected to each other have the transmission of electrical signals or data, should be understood as "electrically connected", "communicatively connected", etc.

[0054] It can be understood that "at least one" means one or more, and "a plurality of" means two or more. "At least part of an element" means part or all of the element.

[0055] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", or the like, when used in this specification, specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0056] In one exemplary embodiment, in conjunction with Figure 1 With Figure 2 An auxiliary power supply is provided, which includes a primary side circuit 10 and a plurality of first secondary side circuits 20.

[0057] Each first secondary side circuit 20 includes a first secondary side winding 210, a rectification module 220 and a voltage division module 230. In each first secondary side circuit 20, the input end of the rectification module 220 is connected with the first secondary side winding 210, the output end of the rectification module 220 is connected with the input end of the voltage division module 230, and the output end of the voltage division module 230 is connected to the corresponding bridge arm in the three-phase full-bridge circuit through a driving chip.

[0058] The auxiliary power supply has a transformer structure. The primary side circuit 10 of the auxiliary power supply can include a primary side winding and a hardware circuit function module connected with the primary side winding. The rectification module 220 has the function of rectifying a voltage signal and can output a direct current voltage. The rectification module 220 can be composed of a plurality of semiconductor components and / or electronic components with rectification function. For example, the rectification module 220 outputs a direct current voltage of +23V based on the rectification of the first secondary side winding 210. The voltage division module 230 has the functions of voltage division, voltage stabilization and bypass. The voltage division module 230 can be composed of a plurality of semiconductor components and / or electronic components with voltage division capability, voltage stabilization function and bypass function. For example, the semiconductor components are diodes, and the electronic components are resistors and capacitors.

[0059] The three-phase full-bridge circuit 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), a total of six bridge arms; the U-phase upper bridge arm is connected with the U-phase lower bridge arm, the V-phase upper bridge arm is connected with the V-phase lower bridge arm, and the W-phase upper bridge arm is connected with the W-phase lower bridge arm; each bridge arm includes a parallel structure of MOSFET and IGBT power tubes, the driving voltage signals of the MOSFET are +18V and -5V, and the driving voltage signals of the IGBT are +16V and -5V, so each bridge arm needs two groups of driving voltage signals, +18V and -5V and +16V and -5V. The three-phase full-bridge circuit is, for example, a three-phase full-bridge circuit in an electric control product.

[0060] For the embodiment of the present application, the rectifier module 220 rectifies the output DC voltage based on the first secondary winding 210, and the voltage dividing module 230 can output a plurality of different driving voltage signals, for example, +18V and -5V and +16V and -5V, to the driving chip according to the voltage output by the rectifier module 220, and the plurality of different driving voltage signals are used to drive the power devices in the corresponding bridge arm, for example, to drive different types of power tubes in the corresponding bridge arm, such as MOSFET and IGBT. The driving chip is, for example, a driving chip in an electric control product.

[0061] That is, by setting the rectifier module 220 and the voltage dividing module 230, only one first secondary circuit 20 can provide a plurality of different driving voltage signals required to drive one bridge arm, that is, each bridge arm only corresponds to one first secondary circuit 20 to provide driving voltage signals, and thus the six bridge arms of the three-phase full-bridge circuit only need to be provided with driving voltage signals by six first secondary circuits 20, thereby greatly reducing the number of secondary windings compared with the related art, reducing the size of the auxiliary power supply, facilitating the layout and wiring of the auxiliary power supply inside the electric control product. At the same time, since the auxiliary power supply provided by the embodiment of the present application only includes one primary circuit 10, the cost of the auxiliary power supply is low, and the practicability is strong.

[0062] In an exemplary embodiment, continuing to combine Figure 1 With Figure 2 The auxiliary power supply includes six first secondary circuits 20, and the output end of the voltage dividing module 230 of each first secondary circuit 20 is connected to the corresponding bridge arm in the three-phase full-bridge circuit through the driving chip.

[0063] In the embodiment, each bridge arm corresponds to only one first auxiliary side circuit 20 to provide a driving voltage signal, and thus the six bridge arms of the three-phase full-bridge circuit only need to be provided with driving voltage signals by six first auxiliary side circuits 20, thereby greatly reducing the number of auxiliary side windings and the volume of the auxiliary power supply compared with the related art. It can be understood that the number of driving chips between the first auxiliary side circuit 20 and the bridge arm is arbitrary, and is not specifically limited.

[0064] In an exemplary embodiment, referring to Figure 3 The voltage dividing module 230 includes a first voltage dividing unit 231 and a second voltage dividing unit 232. The first voltage dividing unit 231 and the second voltage dividing unit 232 each have voltage dividing, voltage stabilizing, bypass, and the like functions, and the first voltage dividing unit 231 and / or the second voltage dividing unit 232 can be composed of a plurality of semiconductor components and / or electronic components having voltage dividing, voltage stabilizing, and bypass functions. Exemplarily, the semiconductor components are diodes and the like, and the electronic components are resistors, capacitors, and the like.

[0065] The input end of the first voltage dividing unit 231 is connected to the output end of the rectifying module 220, the output end of the first voltage dividing unit 231 is connected to the corresponding bridge arm through a driving chip, and the first voltage dividing unit 231 is configured to output a first group of driving voltage signals to the driving chip according to the voltage output by the rectifying module 220, and the first group of driving voltage signals are used to drive the first switch tube in the corresponding bridge arm. For example, the first voltage dividing unit 231 outputs a first group of driving voltage signals after respectively stabilizing and dividing the voltage output by the rectifying module 220, and exemplarily, the first group of driving voltage signals are +18V and -5V, which are used to drive the MOSFET in the bridge arm, i.e., the first switch tube is exemplarily a MOSFET.

[0066] The input end of the second voltage dividing unit 232 is connected to the output end of the rectifying module 220, the output end of the second voltage dividing unit 232 is connected to the bridge arm corresponding to the connection of the first voltage dividing unit 231 through a driving chip, and the second voltage dividing unit 232 is configured to output a second group of driving voltage signals to the driving chip according to the voltage output by the rectifying module 220, and the second group of driving voltage signals are used to drive the second switch tube in the corresponding bridge arm. For example, the second voltage dividing unit 232 outputs a second group of driving voltage signals after respectively stabilizing and dividing the voltage output by the rectifying module 220, and exemplarily, the second group of driving voltage signals are +16V and -5V, which are used to drive the IGBT in the bridge arm, i.e., the first switch tube is exemplarily an IGBT.

[0067] In this embodiment, the voltage dividing module 230 includes two independent voltage dividing units, which are respectively connected with the output end of the rectifying module 220 and respectively used for generating a first group of driving voltage signals and a second group of driving voltage signals according to the voltage output by the rectifying module 220, so as to drive the MOSFET and IGBT in the bridge arm, so that the voltage dividing module 230 has simple structure, is easy to implement, and has strong practicability.

[0068] In one exemplary embodiment, referring to Figure 4 The first voltage dividing unit 231 includes a first voltage stabilizing subunit 2311, a first dummy load subunit 2312, and a first bypass capacitor subunit 2313. The first voltage stabilizing subunit 2311 and the first dummy load subunit 2312 are both connected with the output end of the rectifying module 220, the first voltage stabilizing subunit 2311 is connected with the first dummy load subunit 2312, and the first bypass capacitor subunit 2313 is connected with the first voltage stabilizing subunit 2311 and the first dummy load subunit 2312. The first voltage stabilizing subunit 2311 is used for outputting a first driving voltage signal in the first group of driving voltage signals according to the voltage output by the rectifying module 220, for example, the first voltage stabilizing subunit 2311 outputs -5V after voltage stabilization and voltage division of the voltage output by the rectifying module 220. The first dummy load subunit 2312 is used for outputting a second driving voltage signal in the first group of driving voltage signals according to the voltage output by the rectifying module 220, for example, the first dummy load subunit 2312 outputs +18V after voltage division of the voltage output by the rectifying module 220.

[0069] In this embodiment, the first voltage dividing unit 231 includes the first voltage stabilizing subunit 2311 and the first dummy load subunit 2312, and can generate the first group of driving voltage signals, such as +18V and -5V, according to the voltage output by the rectifying module 220, which are used for driving the MOSFET in the bridge arm, so that the first voltage dividing unit 231 has simple structure, is easy to implement, and has strong practicability.

[0070] In the embodiments of the present application, the first voltage stabilizing subunit 2311 can be composed of at least one diode, the first dummy load subunit 2312 can be composed of a plurality of resistors, and the first bypass capacitor subunit 2313 can be composed of a plurality of capacitors.

[0071] In one exemplary embodiment, referring to Figure 5 The first voltage stabilizing subunit 2311 includes a first diode D1, the first dummy load subunit 2312 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, and the first bypass capacitor subunit 2313 includes a first capacitor C1 and a second capacitor C2.

[0072] The one end of the first resistor R1 to the fourth resistor R4 connected in parallel is connected with the first sub-output end of the rectifier module 220, the other end of the first resistor R1 to the fourth resistor R4 connected in parallel is connected with the cathode of the first diode D1, the anode of the first diode D1 is connected with the second sub-output end of the rectifier module 220, the first capacitor C1 is connected with the fourth resistor R4 in parallel, and the second capacitor C2 is connected with the first diode D1 in parallel; and the first voltage division unit 231 is connected with the reference ground GND_U, and the reference ground GND_U is specifically connected with the cathode of the first diode D1.

[0073] The first diode D1 can be a voltage stabilizing diode, for example, a Zener diode. The first diode D1 outputs -5V after voltage stabilizing and voltage division of the voltage output by the rectifier module 220. The first resistor R1 to the fourth resistor R4 output +18V after voltage division of the voltage output by the rectifier module 220.

[0074] In the embodiment, the first voltage stabilizing sub-unit 2311 is composed of diodes, the first dummy load sub-unit 2312 is composed of multiple resistors, and the first bypass capacitor sub-unit 2313 is composed of multiple capacitors, so that the first voltage division unit 231 has simple structure, is easy to implement, has low cost, and has strong practicality.

[0075] In one exemplary embodiment, with reference to Figure 6A A damping resistor sub-unit 240 is arranged between the first voltage stabilizing sub-unit 2311 and the output end of the rectifier module 220.

[0076] In one exemplary embodiment, with reference to Figure 6B A damping resistor sub-unit 240 is arranged between the first dummy load sub-unit 2312 and the output end of the rectifier module 220.

[0077] In one exemplary embodiment, with reference to Figure 6C A damping resistor sub-unit 240 is arranged between the first voltage stabilizing sub-unit 2311 and the output end of the rectifier module 220, and between the first dummy load sub-unit 2312 and the output end of the rectifier module 220.

[0078] The damping resistor sub-unit 240 can prevent loop interference, avoid that in different conduction and cutoff states of MOSFET and IGBT, the high-frequency driving signal forms loop interference due to the voltage stabilizing diode and the dummy load, and causes the output first group of driving voltage signals to fluctuate, and the damping resistor sub-unit 240 can increase the damping of the interference signal and ensure the stability of the output first group of driving voltage signals. Exemplarily, the damping resistor sub-unit 240 is composed of at least one resistor.

[0079] In one exemplary embodiment, with reference to Figure 7The second voltage dividing unit 232 includes a second voltage stabilizing sub-unit 2321, a second dummy load sub-unit 2322, and a second bypass capacitor sub-unit 2323. The second voltage stabilizing sub-unit 2321 and the second dummy load sub-unit 2322 are connected with the output end of the rectifying module 220, the second voltage stabilizing sub-unit 2321 is connected with the second dummy load sub-unit 2322, and the second bypass capacitor sub-unit 2323 is connected with the second voltage stabilizing sub-unit 2321 and the second dummy load sub-unit 2322. The second voltage stabilizing sub-unit 2321 is configured to output a third driving voltage signal in the second group of driving voltage signals according to the voltage output by the rectifying module 220, for example, the second voltage stabilizing sub-unit 2321 outputs +16V after voltage stabilization and voltage division of the voltage output by the rectifying module 220. The second dummy load sub-unit 2322 is configured to output a fourth driving voltage signal in the second group of driving voltage signals according to the voltage output by the rectifying module 220, for example, the second dummy load sub-unit 2322 outputs -5V after voltage division of the voltage output by the rectifying module 220.

[0080] In the embodiment, the second voltage dividing unit 232 includes the second voltage stabilizing sub-unit 2321 and the second dummy load sub-unit 2322, which can generate the second group of driving voltage signals, such as +16V and -5V, according to the voltage output by the rectifying module 220, for driving the IGBT in the bridge arm. This makes the second voltage dividing unit 232 simple in structure, easy to implement, and strong in practicability.

[0081] In the embodiment, the second voltage stabilizing sub-unit 2321 can be composed of at least one diode and at least one resistor, the second dummy load sub-unit 2322 can be composed of a plurality of resistors, and the second bypass capacitor sub-unit 2323 can be composed of a plurality of capacitors.

[0082] In one exemplary embodiment, referring to Figure 8 The second voltage stabilizing sub-unit 2321 includes a second diode D2, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7. The second dummy load sub-unit 2322 includes a ninth resistor R9, an eighth resistor R8, and a tenth resistor R10. The second bypass capacitor sub-unit 2323 includes a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6.

[0083] The one end of the fifth resistor R5 to the seventh resistor R7 connected in parallel is connected with the first sub-output end of the rectifier module 220, and the other end of the fifth resistor R5 to the seventh resistor R7 connected in parallel is connected with the cathode of the second diode D2; the one end of the ninth resistor R9 to the tenth resistor R10 connected in parallel is connected with the anode of the second diode D2, and the other end of the ninth resistor R9 to the tenth resistor R10 connected in parallel is connected with the second sub-output end of the rectifier module 220; the third capacitor C3 is connected in parallel with the second diode D2, the fourth capacitor C4 is connected in parallel with the third capacitor C3, the fifth capacitor C5 is connected in parallel with the tenth resistor R10, and the sixth capacitor C6 is connected in parallel with the fifth capacitor C5; and the second voltage dividing unit 232 is connected to the reference ground GND_U, and the reference ground GND_U is specifically connected to the anode of the second diode D2.

[0084] The second diode D2 can be a voltage stabilizing diode, for example, a Zener diode. The second diode D2 outputs +16V after voltage stabilizing and voltage dividing of the voltage output by the rectifier module 220. The fifth resistor R5 to the seventh resistor R7 output +2V after voltage dividing of the voltage output by the rectifier module 220, and the ninth resistor R9 to the tenth resistor R10 output -5V after voltage dividing of the voltage output by the rectifier module 220.

[0085] In the embodiment, the second voltage stabilizing sub-unit 2321 is composed of a diode and a resistor, the second dummy load sub-unit 2322 is composed of a plurality of resistors, and the second bypass capacitor sub-unit 2323 is composed of a plurality of capacitors, so that the first voltage dividing unit 231 has simple structure, is easy to implement, has low cost, and has strong practicality.

[0086] In one exemplary embodiment, with reference to Figure 9A A damping resistor sub-unit 240 is arranged between the second voltage stabilizing sub-unit 2321 and the output end of the rectifier module 220.

[0087] In one exemplary embodiment, with reference to Figure 9B A damping resistor sub-unit 240 is arranged between the second dummy load sub-unit 2322 and the output end of the rectifier module 220.

[0088] In one exemplary embodiment, with reference to Figure 9C A damping resistor sub-unit 240 is arranged between the second voltage stabilizing sub-unit 2321 and the output end of the rectifier module 220, and between the second dummy load sub-unit 2322 and the output end of the rectifier module 220.

[0089] In the embodiment, the damping resistor sub-unit 240 can add damping to the loop interference signal, so as to ensure the stability of the output second group of driving voltage signals. Exemplarily, the damping resistor sub-unit 240 is composed of at least one resistor.

[0090] In one exemplary embodiment, with reference toFigure 10 The rectification module 220 includes a rectification diode unit 221 and a rectification capacitor unit 222. An input end of the rectification diode unit 221 is connected with a first end of the first secondary winding 210, an output end of the rectification diode unit 221 is connected with a first end of the rectification capacitor unit 222, and a second end of the rectification capacitor unit 222 is connected with a second end of the first secondary winding 210.

[0091] In the embodiment, the rectification diode unit 221 can be composed of at least one diode, and the rectification capacitor unit 222 can be composed of a plurality of capacitors.

[0092] In an exemplary embodiment, referring to Figure 11 The rectification diode unit 221 includes a third diode D3, and the rectification capacitor unit includes a seventh capacitor C7, an eighth capacitor C8 and a ninth capacitor C9.

[0093] The third diode D3 can be a Schottky diode and functions as a rectifier. One end of the seventh capacitor C7 to the ninth capacitor C9 in parallel connection is connected with a cathode of the third diode D3, an anode of the third diode D3 is connected with the first end of the first secondary winding 210, and the other end of the seventh capacitor C7 to the ninth capacitor C9 in parallel connection is connected with the second end of the first secondary winding 210.

[0094] In an exemplary embodiment, referring to Figure 12 The auxiliary power supply further includes a second secondary circuit 30, the second secondary circuit 30 is used for outputting a feedback power supply, the second secondary circuit 30 is used for connecting a resolver circuit of the motor, and the second secondary circuit 30 is connected with another reference ground DGND. The feedback power supply can be output to the resolver circuit of the motor to supply power to the resolver circuit. Exemplarily, the feedback power supply voltage is +12V.

[0095] In the embodiment, the second secondary circuit 30 can be composed of a plurality of semiconductor components and / or electronic components with voltage division capability, voltage stabilization function and bypass function. Exemplarily, the semiconductor components are diodes, and the electronic components are resistors and capacitors.

[0096] In an exemplary embodiment, referring to Figure 13 The second secondary circuit 30 can include a second secondary winding 310, a fourth diode D4, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, an eleventh resistor R11 and a twelfth resistor R12.

[0097] The fourth diode D4 can be a Schottky diode and functions as a rectifier.

[0098] In one example embodiment, referring to Figure 14A The primary side circuit 10 can be composed of the primary side winding 110, a plurality of capacitors, resistors, transistors and other semiconductor components.

[0099] Based on the same inventive concept, the utility model embodiment further provides an electric control product, the electric control product includes drive chip, three phase full bridge circuit and the auxiliary power supply of any embodiment of electric control product provided by above-mentioned;Among them, three phase full bridge circuit is connected with drive chip, and is used for connecting motor.

[0100] The electric control product and the auxiliary power supply of electric control product provided by the utility model embodiment belong to the same utility model concept, can solve the same technical problem, and then reach the same technical effect, and the repeated content will not be described here.

[0101] Based on the same utility model concept, the embodiment of the application further provides a vehicle, the vehicle includes a motor and an electric control product as provided in the above embodiments.

[0102] The vehicle and the auxiliary power supply of electric control product provided by the utility model embodiment belong to the same utility model concept, can solve the same technical problem, and then reach the same technical effect, and the repeated content will not be described here.

[0103] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0104] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present specification.

[0105] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An auxiliary power supply, characterized by, The auxiliary power supply comprises a primary circuit and a plurality of first secondary circuits; Each of the first secondary circuits comprises a first secondary winding, a rectifier module and a voltage dividing module; wherein the input end of the rectifier module is connected with the first secondary winding, the output end of the rectifier module is connected with the input end of the voltage dividing module, and the output end of the voltage dividing module is connected to the corresponding bridge arm in the three-phase full-bridge circuit through a driving chip; The voltage dividing module is configured to output a plurality of different driving voltage signals to the driving chip according to the voltage output by the rectifier module, and the plurality of different driving voltage signals are configured to drive the power devices in the corresponding bridge arm.

2. The auxiliary power supply of claim 1, wherein, The voltage dividing module comprises a first voltage dividing unit and a second voltage dividing unit; The input end of the first voltage dividing unit is connected with the output end of the rectifier module, the output end of the first voltage dividing unit is connected to the corresponding bridge arm through the driving chip, and the first voltage dividing unit is configured to output a first group of driving voltage signals to the driving chip according to the voltage output by the rectifier module, and the first group of driving voltage signals are configured to drive a first switch tube in the corresponding bridge arm; The input end of the second voltage dividing unit is connected with the output end of the rectifier module, the output end of the second voltage dividing unit is connected to the bridge arm connected with the first voltage dividing unit through the driving chip, and the second voltage dividing unit is configured to output a second group of driving voltage signals to the driving chip according to the voltage output by the rectifier module, and the second group of driving voltage signals are configured to drive a second switch tube in the corresponding bridge arm; Wherein, the first switch tube and the second switch tube are different types of switch tubes.

3. The auxiliary power supply of claim 2, wherein, The first voltage dividing unit comprises a first voltage stabilizing subunit, a first dummy load subunit and a first bypass capacitor subunit; The first voltage stabilizing subunit and the first dummy load subunit are both connected with the output end of the rectifier module, the first voltage stabilizing subunit is connected with the first dummy load subunit, and the first bypass capacitor subunit is connected with the first voltage stabilizing subunit and the first dummy load subunit; Wherein, the first voltage stabilizing subunit is configured to output a first driving voltage signal in the first group of driving voltage signals according to the voltage output by the rectifier module, and the first dummy load subunit is configured to output a second driving voltage signal in the first group of driving voltage signals according to the voltage output by the rectifier module.

4. The auxiliary power supply of claim 3, wherein, A damping resistance subunit is arranged between the first voltage stabilizing subunit and the output end of the rectifier module, and / or between the first dummy load subunit and the output end of the rectifier module.

5. The auxiliary power supply of claim 2, wherein, The second voltage dividing unit comprises a second voltage stabilizing subunit, a second dummy load subunit and a second bypass capacitor subunit; The second voltage stabilizing subunit and the second dummy load subunit are both connected with the output end of the rectifier module, the second voltage stabilizing subunit is connected with the second dummy load subunit, and the second bypass capacitor subunit is connected with the second voltage stabilizing subunit and the second dummy load subunit; The second voltage stabilizing subunit is configured to output a third driving voltage signal in the second group of driving voltage signals according to a voltage output by the rectifying module, and the second dummy load subunit is configured to output a fourth driving voltage signal in the second group of driving voltage signals according to the voltage output by the rectifying module.

6. The auxiliary power supply of claim 5, wherein, A damping resistance subunit is arranged between the second voltage stabilizing subunit and an output end of the rectifying module, and / or between the second dummy load subunit and the output end of the rectifying module.

7. The auxiliary power supply of claim 1, wherein The rectifying module comprises a rectifying diode subunit and a rectifying capacitor subunit. An input end of the rectifying diode subunit is connected to a first end of the first secondary winding, an output end of the rectifying diode subunit is connected to a first end of the rectifying capacitor subunit, and a second end of the rectifying capacitor subunit is connected to a second end of the first secondary winding.

8. The auxiliary power supply of claim 1, wherein, The auxiliary power supply comprises six first secondary circuits, and an output end of a voltage dividing module of each first secondary circuit is connected to a corresponding bridge arm of the three-phase full-bridge circuit through the driving chip.

9. The auxiliary power supply of claim 1, wherein, The auxiliary power supply further comprises a second secondary circuit configured to be connected to a resolver circuit of a motor to output a feedback power supply to the resolver circuit.

10. An electrically controlled product, characterized by The electric control product comprises a driving chip, a three-phase full-bridge circuit and the auxiliary power supply according to any one of claims 1-9, wherein the three-phase full-bridge circuit is connected to the driving chip and is configured to be connected to a motor.

11. A vehicle characterized by comprising: The vehicle comprises a motor and the electric control product according to claim 10.

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