Power supply circuit, motor driving power supply system and vehicle

Abstract

The utility model discloses a power supply circuit, a motor driving power supply system and a vehicle. The power supply circuit comprises a first protection module connected with a first external power supply and a second protection module connected with a second external power supply. The first driving power supply module is connected with a second external power supply, an upper bridge circuit of the motor controller is connected with the output end of the first protection module, and the upper bridge circuit is driven to work according to an electric signal output by the first protection module and / or an electric signal provided by the second external power supply; the second driving power supply module is connected with a first external power supply, a lower bridge circuit of the motor controller is connected with the second protection module, and the lower bridge circuit is driven to work according to an electric signal output by the first external power supply and / or an electric signal output by the second protection module. According to the technical scheme, by independently supplying power to the upper bridge circuit and the lower bridge circuit of the motor controller, it is ensured that the motor controller enters the ASC protection mode when the counter electromotive force generated by the motor is too high, and the reliability of the power supply circuit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply technical field especially relates to a power supply circuit, motor drive power supply system and vehicle. BACKGROUND

[0002] In the motor controller, ASC (Active Short Circuit, active short circuit protection, ASC for short) is an important protection function, and the purpose is to quickly reduce the current flowing through the motor by actively introducing a low impedance path when detecting that the motor winding occurs short circuit, thereby protecting the motor and the controller from damage. The existing motor controller drive power supply scheme is to perform primary side feedback closed loop control through a flyback power supply chip. If load end voltage drop occurs, it may cause the mos tube in the three-phase bridge arm of the motor controller to be always on, heat and short circuit, which has the risk of damaging the components of the entire circuit. Therefore, it is easy to cause the three-phase bridge arm of the motor controller to fail, and when current anomaly occurs, the motor controller cannot normally perform ASC protection. SUMMARY

[0003] The utility model embodiment provides a kind of power supply circuit, motor drive power supply system and vehicle, to solve the problem of poor reliability of existing motor controller drive power supply scheme.

[0004] A power supply circuit, comprising a first protection module, a second protection module, a first drive power supply module and a second drive power supply module;

[0005] The input end of the first protection module is used to connect the first external power supply, and the input end of the second protection module is used to connect the second external power supply;

[0006] The first drive power supply module is used to connect the second external power supply and the upper bridge circuit of the motor controller, and is connected with the output end of the first protection module, for driving the upper bridge circuit to work according to the electrical signal output by the output end of the first protection module and / or the electrical signal provided by the second external power supply when the second protection module is in protection mode;

[0007] The second drive power supply module is used to connect the first external power supply and the lower bridge circuit of the motor controller, and is connected with the output end of the second protection module, for driving the lower bridge circuit to work according to the electrical signal output by the first external power supply and / or the electrical signal output by the output end of the second protection module when the first protection module is in protection mode.

[0008] Further, the first protection module comprises a first electronic fuse; and the second protection module comprises a second electronic fuse.

[0009] Further, the power supply circuit further comprises a first voltage stabilizing module and a second voltage stabilizing module;

[0010] The input end of the first voltage stabilizing module is used for connecting the first external power supply, and the output end of the first voltage stabilizing module is connected with the input end of the first protection module;

[0011] The input end of the second voltage stabilizing module is used for connecting the second external power supply, and the output end of the second voltage stabilizing module is connected with the input end of the second protection module.

[0012] Further, the first driving power supply module and the second driving power supply module are both open-loop driving power supply modules.

[0013] Further, the power supply circuit comprises a first unidirectional conduction circuit and a second unidirectional conduction circuit;

[0014] The input end of the first unidirectional conduction circuit is used for connecting the second external power supply, and the output end of the first unidirectional conduction circuit is connected with the first driving power supply module;

[0015] The input end of the second unidirectional conduction circuit is used for connecting the first external power supply, and the output end of the second unidirectional conduction circuit is connected with the second driving power supply module.

[0016] Further, the first unidirectional conduction circuit comprises a first diode, and the second unidirectional conduction circuit comprises a second diode.

[0017] Further, the first driving power supply module comprises an upper bridge power supply module, an upper bridge isolation transformer module and an upper bridge power drive module;

[0018] The input end of the upper bridge power supply module is connected with the output end of the first protection module, the output end of the upper bridge power supply module is connected with the input end of the upper bridge isolation transformer module, the output end of the upper bridge isolation transformer module is connected with the input end of the upper bridge power drive module, and the output end of the upper bridge power drive module is used for connecting the upper bridge circuit;

[0019] The second driving power supply module comprises a lower bridge power supply module, a lower bridge isolation transformer module and a lower bridge power drive module;

[0020] The input end of the lower bridge power supply module is connected with the output end of the second protection module, the output end of the lower bridge power supply module is connected with the input end of the lower bridge isolation transformer module, the output end of the lower bridge isolation transformer module is connected with the input end of the lower bridge power drive module, and the output end of the lower bridge power drive module is used for connecting the lower bridge circuit.

[0021] Further, the upper bridge isolation transformer module and / or the lower bridge isolation transformer module comprises a winding transformer or a planar transformer.

[0022] A motor driving power supply system comprises a first external power supply, a second external power supply, a motor controller and the power supply circuit; the motor controller comprises an upper bridge circuit and a lower bridge circuit;

[0023] The first external power supply is connected with an input end of the first protection module, and the second external power supply is connected with an input end of the second protection module;

[0024] The upper bridge circuit is connected with the first driving power supply module;

[0025] The lower bridge circuit is connected with the second driving power supply module.

[0026] A vehicle comprises the motor driving power supply system.

[0027] The power supply circuit, the motor driving power supply system and the vehicle, the power supply circuit comprises a first protection module, a second protection module, a first driving power supply module and a second driving power supply module; an input end of the first protection module is used for connecting a first external power supply, and an input end of the second protection module is used for connecting a second external power supply; the first driving power supply module is used for connecting the second external power supply and an upper bridge circuit of the motor controller, and is connected with an output end of the first protection module, and is used for driving the upper bridge circuit to work according to an electric signal output by the output end of the first protection module and / or an electric signal provided by the second external power supply when the second protection module is in a protection mode; the second driving power supply module is used for connecting the first external power supply and a lower bridge circuit of the motor controller, and is connected with an output end of the second protection module, and is used for driving the lower bridge circuit to work according to an electric signal output by the first external power supply and / or an electric signal output by the output end of the second protection module when the first protection module is in the protection mode. By independently supplying power to the upper bridge circuit and the lower bridge circuit of the motor controller, when any one of the first external power supply or the second external power supply is abnormal, or any one of the upper bridge circuit and the lower bridge circuit is abnormal, the motor controller can also enter the ASC protection mode when the counter electromotive force generated by the motor is too high, and the reliability of the power supply circuit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0029] Figure 1It is a circuit schematic diagram of the power supply circuit in one embodiment of the utility model.

[0030] In the figure: 11, first protection module; 12, second protection module; 21, first drive power module; 211, upper bridge power module; 212, upper bridge isolation transformer module; 213, upper bridge power drive module; 22, second drive power module; 221, lower bridge power module; 222, lower bridge isolation transformer module; 223, lower bridge power drive module; 31, first voltage stabilizing module; 32, second voltage stabilizing module; 41, first unidirectional conducting circuit; 42, second unidirectional conducting circuit; 51, first external power supply; 52, second external power supply. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0032] It should be understood that the utility model can be implemented in different forms, and should not be interpreted as being limited to the embodiments presented here. On the contrary, the presentation of these embodiments will make the disclosure complete and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, the size and relative size of the layers and regions may be exaggerated for clarity throughout the same reference numerals represent the same elements.

[0033] It should be understood that when an element or layer is referred to as "on", "adjacent", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected or coupled to other elements or layers, or there can be intervening elements or layers. Conversely, when an element is referred to as "directly on", "directly adjacent", "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, the first element, component, region, layer or part discussed below can be represented as the second element, component, region, layer or part without departing from the teachings of the utility model.

[0034] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and / or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent element or feature described as "below" or "beneath" another element or feature would then be oriented "above" and / or "over" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] For a thorough understanding of the present application, reference will be made to the following detailed description, taken in conjunction with the accompanying drawings, in which:

[0037] The present embodiment provides a power supply circuit, which is applied in a motor drive power supply system. Exemplarily, the motor drive power supply system is applied in a vehicle. The motor drive power supply system comprises a first external power supply 51, a second external power supply 52, a motor controller and the power supply circuit.

[0038] As an example, the first external power supply 51 and the second external power supply 52 are batteries. The first external power supply 51 and the second external power supply 52 can be different batteries or the same battery. Preferably, the first external power supply 51 and the second external power supply 52 are different batteries in the vehicle. Exemplarily, the first external power supply 51 is a low-voltage storage battery, and the second external power supply 52 is a high-voltage power battery.

[0039] As an example, the motor controller includes a three-phase bridge circuit. The three-phase bridge circuit is used to connect the motor and the power battery of the vehicle. The three-phase bridge circuit includes an upper bridge circuit and a lower bridge circuit. The upper bridge circuit includes three upper bridge power tubes, and the lower bridge circuit includes three lower bridge power tubes. Each upper bridge power tube is connected in series with a lower bridge power tube between the positive and negative poles of the power battery. A connection node between each upper bridge power tube and each lower bridge power tube is used to connect a phase line of the motor winding.

[0040] The embodiment provides a power supply circuit, which comprises a first protection module 11, a second protection module 12, a first driving power supply module 21 and a second driving power supply module 22. An input end of the first protection module 11 is used to be connected with a first external power supply 51, and an input end of the second protection module 12 is used to be connected with a second external power supply 52. The first driving power supply module 21 is used to be connected with the second external power supply 52 and an upper bridge circuit of a motor controller, and is connected with an output end of the first protection module 11, and is used to drive the upper bridge circuit to work according to an electrical signal output by the output end of the first protection module 11 and / or an electrical signal provided by the second external power supply 52 when the second protection module 12 is in a protection mode. The second driving power supply module 22 is used to be connected with the first external power supply 51 and a lower bridge circuit of the motor controller, and is connected with an output end of the second protection module 12, and is used to drive the lower bridge circuit to work according to an electrical signal output by the first external power supply 51 and / or an electrical signal output by the output end of the second protection module 12 when the first protection module 11 is in the protection mode.

[0041] As an example, when the power supply circuit works, the first protection module 11 detects the current and voltage in the circuit, and when overcurrent or overvoltage occurs, the first protection module 11 enters the protection mode, that is, is in a disconnected state, and disconnects the first external power supply 51 and the first driving power supply module 21, so as to protect the front-stage circuit of the first protection module 11, such as the first external power supply 51. When the back electromotive force generated by the motor is too high at this time, the second driving power supply module 22 can drive the lower bridge circuit to form a short circuit with the motor winding through the electrical signal output by the first external power supply 51 and / or the electrical signal output by the output end of the second protection module 12, so as to consume the back electromotive force generated by the motor.

[0042] As another example, when the power supply circuit is working, the second protection module 12 detects the current and voltage in the loop, when overcurrent or overvoltage occurs, the second protection module 12 enters the protection mode, that is, in the off state, disconnecting the second external power supply 52 and the second drive power supply module 22, to protect the front-stage circuit of the second protection module 12, such as the second external power supply 52. When the back electromotive force generated by the motor is too high at this time, the first drive power supply module 21 can drive the upper bridge circuit to form a short circuit with the motor winding through the electrical signal output by the second external power supply 52 and / or the electrical signal output by the output end of the first protection module 11, to consume the back electromotive force generated by the motor.

[0043] Exemplarily, the output end of the first protection module 11 is connected with the first drive power supply module 21 through a diode D1, and the output end of the second protection module 12 is connected with the second drive power supply module 22 through a diode D4, in a manner that the back electromotive force generated by the motor is prevented from flowing back.

[0044] In the embodiment, the power supply circuit comprises the first protection module 11, the second protection module 12, the first drive power supply module 21 and the second drive power supply module 22; the input end of the first protection module 11 is used for connecting the first external power supply 51, and the input end of the second protection module 12 is used for connecting the second external power supply 52; the first drive power supply module 21 is used for connecting the second external power supply 52 and the upper bridge circuit of the motor controller, and is connected with the output end of the first protection module 11, for driving the upper bridge circuit to work according to the electrical signal output by the output end of the first protection module 11 and / or the electrical signal provided by the second external power supply 52 when the second protection module 12 is in the protection mode; the second drive power supply module 22 is used for connecting the first external power supply 51 and the lower bridge circuit of the motor controller, and is connected with the output end of the second protection module 12, for driving the lower bridge circuit to work according to the electrical signal output by the output end of the first protection module 11 and / or the electrical signal output by the output end of the second protection module 12 when the first protection module 11 is in the protection mode. By independently supplying power to the upper bridge circuit and the lower bridge circuit of the motor controller respectively, when any one of the first external power supply 51 or the second external power supply 52 is abnormal, or any one of the upper bridge circuit and the lower bridge circuit is abnormal, the motor controller can also enter the ASC protection mode when the back electromotive force generated by the motor is too high, and the reliability of the power supply circuit is improved.

[0045] In an embodiment, the first protection module 11 comprises a first electronic fuse; and the second protection module 12 comprises a second electronic fuse.

[0046] As an example, the first electronic fuse and the second electronic fuse are set with a fuse threshold according to actual experience. The fuse threshold can be a current threshold or a voltage threshold. In the embodiment, when the first electronic fuse or the second electronic fuse detects overvoltage or overcurrent in the loop, the first electronic fuse or the second electronic fuse is automatically disconnected, thereby inhibiting overvoltage or overcurrent, protecting the safety of elements in the power supply circuit, and reducing cost.

[0047] In an embodiment, the power supply circuit further comprises a first voltage stabilizing module 31 and a second voltage stabilizing module 32; an input end of the first voltage stabilizing module 31 is connected with the first external power supply 51, and an output end of the first voltage stabilizing module 31 is connected with an input end of the first protection module 11; an input end of the second voltage stabilizing module 32 is connected with the second external power supply 52, and an output end of the second voltage stabilizing module 32 is connected with an input end of the second protection module 12.

[0048] As an example, the input end of the first voltage stabilizing module 31 is connected with the first external power supply 51, and the output end of the first voltage stabilizing module 31 is connected with the input end of the first protection module 11, so as to stabilize the voltage of the input end of the first protection module 11, and further stabilize the voltage of the input end of the first driving power supply module 21.

[0049] As an example, the input end of the second voltage stabilizing module 32 is connected with the second external power supply 52, and the output end of the second voltage stabilizing module 32 is connected with the input end of the second protection module 12, so as to stabilize the voltage of the input end of the first protection module 11, and further stabilize the voltage of the input end of the first driving power supply module 21.

[0050] As an example, the first voltage stabilizing module 31 and the second voltage stabilizing module 32 can be a linear voltage stabilizer (for example, an LM7805 stabilizer), a switching voltage stabilizer (for example, a DC-DC converter), or a voltage stabilizing diode. The first voltage stabilizing module 31 and the second voltage stabilizing module 32 can be set according to actual needs, and are not limited herein.

[0051] In the embodiment, the power supply circuit further comprises a first voltage stabilizing module 31 and a second voltage stabilizing module 32; an input end of the first voltage stabilizing module 31 is connected with the first external power supply 51, and an output end of the first voltage stabilizing module 31 is connected with an input end of the first protection module 11; an input end of the second voltage stabilizing module 32 is connected with the second external power supply 52, and an output end of the second voltage stabilizing module 32 is connected with an input end of the second protection module 12, so that the first driving power supply module 21 can provide a stable driving voltage to the upper bridge circuit, and the second driving power supply module 22 can provide a stable driving voltage to the lower bridge circuit, so that the upper bridge circuit and the lower bridge circuit can work stably and normally.

[0052] In an embodiment, the first driving power supply module 21 and the second driving power supply module 22 are both open-loop driving power supply modules.

[0053] As an example, the first driving power supply module 21 is used to perform step-up and step-down conversion on the electrical signal output by the first protection module 11 or the electrical signal output by the second external power supply 52, so as to output a driving voltage ensuring the normal operation of the upper bridge circuit. The second driving power supply module 22 is used to perform step-up and step-down conversion on the electrical signal output by the second protection module 12 or the electrical signal output by the first external power supply 51, so as to output a driving voltage ensuring the normal operation of the lower bridge circuit.

[0054] In the related art, the driving voltage of the upper bridge circuit and the lower bridge circuit of the output voltage controller is controlled in the form of primary side closed-loop control of the flyback power supply. At this time, if the load end voltage drops, it may cause the power tubes in the upper bridge circuit and the lower bridge circuit to be always on, heat and short circuit, causing the front-end circuit to overcurrent, and causing damage to the components of the entire circuit. Therefore, in the present embodiment, under the voltage stabilization of the first voltage stabilization module 31 and the second voltage stabilization module 32, the first driving power supply module 21 and the second driving power supply module 22 are both open-loop driving power supply modules, so as to replace the form of primary side closed-loop control of the flyback power supply, and the duty cycle of the power tubes in the upper bridge circuit and the lower bridge circuit is fixedly output, and there is no problem of abnormal large duty cycle of the power tubes in the upper bridge circuit and the lower bridge circuit caused by feedback under-voltage.

[0055] In an embodiment, the power supply circuit comprises a first unidirectional conduction circuit 41 and a second unidirectional conduction circuit 42; the input end of the first unidirectional conduction circuit 41 is used to connect the second external power supply 52, and the output end of the first unidirectional conduction circuit 41 is connected with the first driving power supply module 21; the input end of the second unidirectional conduction circuit 42 is used to connect the first external power supply 51, and the output end of the second unidirectional conduction circuit 42 is connected with the second driving power supply module 22.

[0056] In the present embodiment, by connecting the input end of the first unidirectional conduction circuit 41 with the second external power supply 52, and connecting the output end of the first unidirectional conduction circuit 41 with the first driving power supply module 21, the current is prevented from flowing back from the first driving power supply module 21 to the second external power supply 52; by connecting the input end of the second unidirectional conduction circuit 42 with the first external power supply 51, and connecting the output end of the second unidirectional conduction circuit 42 with the second driving power supply module 22, the current is prevented from flowing back from the second driving power supply module 22 to the first external power supply 51.

[0057] In an embodiment, the first unidirectional conducting circuit 41 comprises a first diode D2; and the second unidirectional conducting circuit 42 comprises a second diode D3. In this embodiment, the first unidirectional conducting circuit 41 adopts the first diode D2, and the second unidirectional conducting circuit 42 adopts the second diode D3, so that the circuit is simple and the cost is reduced.

[0058] In an embodiment, the first driving power module 21 comprises an upper bridge power module 211, an upper bridge isolation transformer module 212 and an upper bridge power drive module 213; an input end of the upper bridge power module 211 is connected with an output end of the first protection module 11, an output end of the upper bridge power module 211 is connected with an input end of the upper bridge isolation transformer module 212, an output end of the upper bridge isolation transformer module 212 is connected with an input end of the upper bridge power drive module 213, and an output end of the upper bridge power drive module 213 is used for connecting the upper bridge circuit; the second driving power module 22 comprises a lower bridge power module 221, a lower bridge isolation transformer module 222 and a lower bridge power drive module 223; an input end of the lower bridge power module 221 is connected with an output end of the second protection module 12, an output end of the lower bridge power module 221 is connected with an input end of the lower bridge isolation transformer module 222, an output end of the lower bridge isolation transformer module 222 is connected with an input end of the lower bridge power drive module 223, and an output end of the lower bridge power drive module 223 is used for connecting the lower bridge circuit.

[0059] As an example, the input end of the upper bridge power module 211 receives the electrical signal output by the first protection module 11, that is, the electrical signal output by the first external power supply 51 (low-voltage storage battery) for step-up conversion, or the electrical signal output by the second external power supply 52 (high-voltage power battery) for step-down conversion, and then outputs the converted voltage signal, and then outputs the positive and negative two-way driving voltage to the upper bridge power drive module 213 through the upper bridge isolation transformer module 212, so as to drive the power tube in the upper bridge circuit to be turned on or turned off through the upper bridge power drive module 213. As an example, as shown in the figure, the upper bridge isolation transformer module 212 comprises an isolation transformer module 1, an isolation transformer module 2 and an isolation transformer module 3. The upper bridge power drive module 213 comprises a drive module 1, a drive module 2 and a drive module 3, and the drive module 1, the drive module 2 and the drive module 3 are respectively used for connecting a power tube in an upper bridge circuit. Figure 1

[0060] ​As another example, the input end of the lower bridge power supply module 221 receives the electrical signal output by the second protection module 12, that is, the electrical signal output by the second external power supply 52 (high-voltage power battery) for step-down conversion or the first external power supply 51 (low-voltage storage battery) for step-up conversion, and outputs the converted voltage signal, which is then output to the lower bridge power drive module 223 through the lower bridge isolation transformer module 222 to drive the power tube in the lower bridge circuit to turn on or turn off through the lower bridge power drive module 223. Illustratively, the lower bridge isolation transformer module 222 includes isolation transformer modules 4, 5, and 6. The lower bridge power drive module 223 includes drive modules 4, 5, and 6, and the high-voltage power battery is used to connect the power tube in the lower bridge circuit.

[0061] Illustratively, the power tube described above uses an IGBT tube, and the upper bridge power drive module 213 and the lower bridge power drive module 223 both use an IGBT drive chip.

[0062] In this embodiment, the first drive power supply module 21 uses the upper bridge power supply module 211, the upper bridge isolation transformer module 212, and the upper bridge power drive module 213, and the second drive power supply module 22 uses the lower bridge power supply module 221, the lower bridge isolation transformer module 222, and the lower bridge power drive module 223, to achieve independent power supply for the upper bridge circuit and the lower bridge circuit of the motor controller, respectively, or when any one of the upper bridge circuit and the lower bridge circuit is abnormal, the motor controller can still enter the ASC protection mode when the back electromotive force generated by the motor is too high, thereby improving the reliability of the power supply circuit.

[0063] In an embodiment, the upper bridge isolation transformer module 212 and / or the lower bridge isolation transformer module 222 includes a wire-wound or planar transformer. In this embodiment, the upper bridge isolation transformer module 212 and / or the lower bridge isolation transformer module 222 includes a wire-wound or planar transformer to facilitate PCB layout and symmetrical arrangement, which is beneficial to EMC performance and reduces parasitic parameters.

[0064] This embodiment provides a motor drive power supply system, which includes a first external power supply 51, a second external power supply 52, a motor controller, and the power supply circuit described above; the motor controller includes an upper bridge circuit and a lower bridge circuit; the first external power supply 51 is connected to the input end of the first protection module 11, and the second external power supply 52 is connected to the input end of the second protection module 12; the upper bridge circuit is connected to the first drive power supply module 21; and the lower bridge circuit is connected to the second drive power supply module 22.

[0065] This embodiment provides a vehicle, which includes the motor drive power supply system described above.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A power supply circuit, characterized in that, It includes a first protection module, a second protection module, a first drive power module, and a second drive power module; The input terminal of the first protection module is used to connect to a first external power supply, and the input terminal of the second protection module is used to connect to a second external power supply. The first drive power module is used to connect the second external power supply and the upper bridge circuit of the motor controller, and is connected to the output terminal of the first protection module. When the second protection module is in protection mode, it is used to drive the upper bridge circuit to work according to the electrical signal output by the output terminal of the first protection module and / or the electrical signal provided by the second external power supply. The second drive power module is used to connect the first external power supply and the lower bridge circuit of the motor controller, and is connected to the output terminal of the second protection module. When the first protection module is in protection mode, it is used to drive the lower bridge circuit to work according to the electrical signal output by the first external power supply and / or the electrical signal output by the output terminal of the second protection module.

2. The power supply circuit as described in claim 1, characterized in that, The first protection module includes a first electronic fuse; the second protection module includes a second electronic fuse.

3. The power supply circuit as described in claim 1, characterized in that, The power supply circuit also includes a first voltage regulator module and a second voltage regulator module; The input terminal of the first voltage regulator module is used to connect to the first external power supply, and the output terminal of the first voltage regulator module is connected to the input terminal of the first protection module. The input terminal of the second voltage regulator module is used to connect to the second external power supply, and the output terminal of the second voltage regulator module is connected to the input terminal of the second protection module.

4. The power supply circuit as described in claim 3, characterized in that, Both the first drive power module and the second drive power module are open-loop drive power modules.

5. The power supply circuit as described in claim 1, characterized in that, The power supply circuit includes a first unidirectional conduction circuit and a second unidirectional conduction circuit. The input terminal of the first unidirectional conduction circuit is used to connect to the second external power supply, and the output terminal of the first unidirectional conduction circuit is connected to the first drive power supply module. The input terminal of the second unidirectional conduction circuit is used to connect to the first external power supply, and the output terminal of the second unidirectional conduction circuit is connected to the second drive power supply module.

6. The power supply circuit as described in claim 5, characterized in that, The first unidirectional conduction circuit includes a first diode; the second unidirectional conduction circuit includes a second diode.

7. The power supply circuit as described in claim 1, characterized in that, The first drive power module includes an upper bridge power module, an upper bridge isolation transformer module, and an upper bridge power drive module; The input terminal of the upper bridge power module is connected to the output terminal of the first protection module, the output terminal of the upper bridge power module is connected to the input terminal of the upper bridge isolation transformer module, the output terminal of the upper bridge isolation transformer module is connected to the input terminal of the upper bridge power drive module, and the output terminal of the upper bridge power drive module is used to connect to the upper bridge circuit. The second drive power module includes a lower bridge power module, a lower bridge isolation transformer module, and a lower bridge power drive module; The input terminal of the lower bridge power supply module is connected to the output terminal of the second protection module, the output terminal of the lower bridge power supply module is connected to the input terminal of the lower bridge isolation transformer module, the output terminal of the lower bridge isolation transformer module is connected to the input terminal of the lower bridge power drive module, and the output terminal of the lower bridge power drive module is used to connect to the lower bridge circuit.

8. The power supply circuit as described in claim 7, characterized in that, The upper bridge isolation transformer module and / or the lower bridge isolation transformer module include wound-rotor or planar transformers.

9. A motor drive power supply system, characterized in that, It includes a first external power supply, a second external power supply, a motor controller, and a power supply circuit as described in any one of claims 1 to 8; the motor controller includes an upper bridge circuit and a lower bridge circuit. The first external power supply is connected to the input terminal of the first protection module, and the second external power supply is connected to the input terminal of the second protection module. The upper bridge circuit is connected to the first drive power module; The lower bridge circuit is connected to the second drive power module.

10. A vehicle, characterized in that, Includes the motor drive power supply system as described in claim 9.

Images