Electric drive system and electric vehicle

Abstract

The invention provides an electric drive system and an electric vehicle. The electric drive system comprises a motor and a first filter, and the negative electrode of the power supply port and the negative electrode of the charging port share the first port of the electric drive system. A first branch circuit, a second branch circuit and a third branch circuit which extend from the positive electrode of the power supply port, the positive electrode of the first port and the positive electrode of the charging port to a motor in the electric drive system penetrate through the same magnetic core of a first common mode inductor of the first filter. According to the electric drive system with the high-integration-level filter, the EMC performance can be met, and meanwhile the size and cost of the filter and the electric drive system comprising the filter are reduced.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and in particular to an electric drive system and an electric vehicle. Background Art

[0002] Through clever design, the "all-in-one" electric drive product deeply integrates the motor, electronic control, reducer, and boost module, reducing the components between each device (such as connectors, cooling components, high-voltage wiring harnesses, etc.) to improve the reliability of the entire system, thereby reducing costs while reducing the size and weight of the electric drive product, thereby meeting the needs of new energy vehicles for increased user space and faster charging speeds.

[0003] Please refer to Figure 1 , Figure 1 A schematic diagram of a topological circuit of an existing all-in-one electric drive system is shown.

[0004] like Figure 1 As shown, in the existing all-in-one electric drive system 100, the power supply port connected to the vehicle's high voltage battery (HV battery, High Voltage Battery) and the charging port connected to the charging device are independent external electrical interfaces, and independent filters are used in the power supply port and the charging port respectively. The power supply port and the charging port are both high voltage ports, and the filters used in the power supply port and the charging port respectively need to meet the requirements of high EMC (electromagnetic compatibility, Electromagnetic Compatibility) performance, high voltage insulation and high-level vibration, which makes it difficult for the existing all-in-one electric drive system 100 to take into account the requirements of miniaturization and low cost. Therefore, one of the challenges faced by miniaturization and integration is how to design the high-voltage filter while reducing the volume and cost of the filter while meeting the EMC performance requirements.

[0005] In order to overcome the above-mentioned defects of the prior art, there is an urgent need in the art for an electric drive system with a highly integrated filter, which can reduce the volume and cost of the filter and the electric drive system including the filter while meeting the EMC performance. Summary of the invention

[0006] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electric drive system and an electric vehicle with a highly integrated filter, which can reduce the volume and cost of the filter and the electric drive system including the filter while meeting the EMC performance.

[0008] Specifically, the electric drive system provided according to the first aspect of the present invention includes a motor and a first filter, the negative pole of the power supply port and the negative pole of the charging port share the first port of the electric drive system, and the first branch, the second branch and the third branch extending from the positive pole of the power supply port, the first port and the positive pole of the charging port to the motor inside the electric drive system pass through the same magnetic core of the first common-mode inductor of the first filter.

[0009] Preferably, in an embodiment of the present invention, the front stage and the rear stage of the first common mode inductor include a differential mode noise filter capacitor and a common mode noise filter capacitor.

[0010] Preferably, in an embodiment of the present invention, the differential mode noise filter capacitor and the common mode noise filter capacitor are integrated capacitor components and / or independent single capacitors.

[0011] Preferably, in one embodiment of the present invention, the first end of the common-mode noise filter capacitor is connected to the first branch, the second branch or the third branch, and the second end of the common-mode noise filter capacitor is connected to the housing of the electric drive system.

[0012] Preferably, in one embodiment of the present invention, the differential mode noise filter capacitor includes a first differential mode noise filter capacitor connected between the positive and negative poles of the power supply port and a second differential mode noise filter capacitor connected between the positive and negative poles of the charging port.

[0013] Preferably, in an embodiment of the present invention, the second end of the first differential mode noise filter capacitor and the second end of the second differential mode noise filter capacitor are connected to the second branch.

[0014] Preferably, in an embodiment of the present invention, in the torque output mode, the second differential mode noise filter capacitor and the common mode noise filter capacitor connected to the third branch are connected in series.

[0015] Preferably, in an embodiment of the present invention, a second filter is provided between the positive pole and the negative pole of the charging port.

[0016] Preferably, in one embodiment of the present invention, it also includes a second common-mode inductor, which is arranged before the front stage of the first common-mode inductor, the first branch, the second branch and the third branch pass through the same magnetic core of the second common-mode inductor, and the front stage of the second common-mode inductor includes a differential-mode noise filter capacitor and a common-mode noise filter capacitor located between the positive and negative poles of the charging port.

[0017] Preferably, in an embodiment of the present invention, the third branch is provided with a relay, the relay implements a torque output mode in an open state, and the relay implements a boost charging mode in a closed state.

[0018] Preferably, in an embodiment of the present invention, the motor is a three-phase motor.

[0019] Preferably, in an embodiment of the present invention, the power supply port is connected to a battery, the charging port is connected to a charging device, and the charging device includes a charging pile.

[0020] In addition, the above-mentioned electric vehicle provided according to the second aspect of the present invention includes a battery and the electric drive system provided by the first aspect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0022] Figure 1 A schematic diagram of a topological circuit of an existing all-in-one electric drive system is shown;

[0023] Figure 2 A schematic diagram of a topological circuit of an electric drive system provided according to some embodiments of the present invention is shown;

[0024] Figure 3 A schematic diagram of a local topological circuit of an electric drive system provided according to some embodiments of the present invention is shown; and

[0025] Figure 4 A local topological circuit diagram of an electric drive system provided according to some embodiments of the present invention is shown.

[0026] Reference numerals:

[0027] 100: All-in-one electric drive system;

[0028] 200: Electric drive system;

[0029] 201: First port;

[0030] 202: Positive pole of the power supply port;

[0031] 203: Positive pole of charging port;

[0032] 210: Motor;

[0033] 220: first filter;

[0034] 221: first common mode inductor;

[0035] 231: First Branch Road;

[0036] 232: Second branch road;

[0037] 233: Third Branch Road;

[0038] 301: High voltage negative terminal node on the vehicle;

[0039] 310: Battery;

[0040] 320: charging device;

[0041] 400: Electric drive system;

[0042] 401: first port;

[0043] 412: Negative pole of the power supply port;

[0044] 421: positive pole of charging port;

[0045] 422: Negative pole of charging port;

[0046] 430: second filter;

[0047] 500: Electric drive system;

[0048] 510: a first common mode inductor;

[0049] 520: second common mode inductor;

[0050] 531: First Branch Road;

[0051] 532: Second branch; and

[0052] 533: The third branch. DETAILED DESCRIPTION

[0053] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal" and "vertical" used in the following description should be understood as the directions shown in the paragraph and the related drawings. Such relative terms are only used for the convenience of description and do not mean that the device described therein must be manufactured or operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0056] It is understood that although the terms "first", "second", "third", etc. may be used herein to describe various components, regions, layers and / or parts, these components, regions, layers and / or parts should not be limited by these terms, and these terms are only used to distinguish different components, regions, layers and / or parts. Therefore, the first component, region, layer and / or part discussed below may be referred to as a second component, region, layer and / or part without departing from some embodiments of the present invention.

[0057] As mentioned above, in the existing all-in-one electric drive system, the power supply port connected to the high-voltage battery of the vehicle and the charging port connected to the charging device are independent external electrical interfaces, and independent filters are used in the power supply port and the charging port respectively. Both the power supply port and the charging port are high-voltage ports, and the filters used in the power supply port and the charging port respectively need to meet the requirements of high EMC performance, high-voltage insulation and high-level vibration, which makes it difficult for the existing all-in-one electric drive system to take into account the requirements of miniaturization and low cost. Therefore, one of the challenges faced by miniaturization and integration is how to design the high-voltage filter while reducing the size and cost of the filter while meeting the EMC performance requirements.

[0058] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electric drive system and an electric vehicle with a highly integrated filter, which can reduce the volume and cost of the filter and the electric drive system including the filter while meeting the EMC performance.

[0059] Please refer to Figure 2 , Figure 2 A schematic diagram of a topological circuit of an electric drive system provided according to some embodiments of the present invention is shown.

[0060] like Figure 2As shown, the electric drive system 200 includes a motor 210 and a first filter 220, and the first filter 220 includes a first common mode inductor 221. Figure 2 In the illustrated embodiment, the motor 210 may be a three-phase motor.

[0061] The electric drive system 200 further includes a power supply port connected to a battery 310 of the electric vehicle and a charging port connected to a charging device 320. Here, the battery 310 may be a high-voltage battery, and the charging device 320 may include a DC charging pile.

[0062] The negative pole (T-) of the power supply port and the negative pole (Charge-) of the charging port share the first port 201 inside the electric drive system 200. Optionally, the branch extending from the negative pole of the battery 310 to the first port 201 and the branch extending from the negative pole of the charging device 320 to the first port 201 can be connected to the high-voltage negative terminal node 301 on the vehicle, and then coupled to the first port 201, thereby realizing the negative pole (T-) of the power supply port and the negative pole (Charge-) of the charging port sharing the first port 201. In addition, the positive pole of the power supply port can use the second port 202 of the electric drive system 200, and the positive pole of the charging port can use the third port 203 of the electric drive system 200.

[0063] Through the first port 201, the second port 202 (connected to the positive pole T+ of the power supply port) and the third port 203 (connected to the positive pole Charge+ of the charging port), the electric drive system 200 can realize the integration of the filter of the power supply port and the filter of the charging port. The first branch 231, the second branch 232 and the third branch 233 of the motor 210 extending from the positive pole of the power supply port, the first port 201 and the positive pole of the charging port (that is, from the first port 201, the second port 202, and the third port 203) to the inside of the electric drive system 200 can pass through the same magnetic core of the first common mode inductor 221 of the first filter 220, and generate magnetic flux in the same direction in the coil of the magnetic core, enhancing the blocking effect of the inductance to achieve common mode noise suppression. Common mode noise is a noise current or voltage with the same direction on two or more conductors in a circuit relative to a common reference point (usually a ground wire). In addition, differential mode noise refers to a noise current or voltage flowing between two conductors of a circuit, and its direction is opposite.

[0064] Here, the magnetic core of the first common mode inductor 221 may be made of nanocrystal, ferrite, etc. Preferably, the first branch 231, the second branch 232 and the third branch 233 may be made of copper busbars to conduct current.

[0065] The front stage and the rear stage of the first common mode inductor 221 may include a differential mode noise filter capacitor and a common mode noise filter capacitor. The front stage of the common mode inductor generally refers to the part of the circuit before the signal or power enters the common mode inductor, and the rear stage of the common mode inductor refers to the part of the circuit after the signal or power passes through the common mode inductor.

[0066] Preferably, the common-mode noise filter capacitor may include a first end and a second end, the first end of the common-mode noise filter capacitor may be connected to the first branch, the second branch or the third branch, and the second end may be connected to the housing of the electric drive system.

[0067] The differential mode noise filter capacitor may include a first differential mode noise filter capacitor connected across the positive electrode and the negative electrode of the power supply port and a second differential mode noise filter capacitor connected across the positive electrode and the negative electrode of the charging port.

[0068] like Figure 2 As shown, the common-mode noise filter capacitor can be a Y capacitor connected between the power line and the ground line, that is, a Y1 capacitor and a Y2 capacitor connected between the first branch and the electric drive system housing, a Y3 capacitor and a Y4 capacitor connected between the second branch and the electric drive system housing, and a Y5 capacitor and a Y6 capacitor connected between the third branch and the electric drive system housing. Through the common-mode noise filter capacitor, the first filter 220 can filter out the common-mode noise.

[0069] The differential mode noise filter capacitor can be an X capacitor (a type of jumper capacitor) connected across the power lines. Figure 2 In the illustrated embodiment, the differential mode noise filter capacitor may include a first differential mode noise filter capacitor connected between the positive and negative electrodes of the power supply port, that is, an X1 capacitor and an X2 capacitor connected between the first branch and the second branch; and may also include a second differential mode noise filter capacitor connected between the positive and negative electrodes of the charging port, that is, an X3 capacitor and an X4 capacitor connected between the first branch and the third branch. Through the differential mode noise filter capacitor, the first filter 220 can filter out differential mode noise. The second end of the first differential mode noise filter capacitor and the second end of the second differential mode noise filter capacitor can be connected in the second branch. Figure 2 In the illustrated embodiment, the second end of the X1 capacitor may be connected to the second end of the X3 capacitor, and the second end of the X2 capacitor may be connected to the second end of the X4 capacitor.

[0070] Those skilled in the art can relatively centrally arrange the positions of the differential-mode noise filter capacitors and the common-mode noise filter capacitors, and the differential-mode noise filter capacitors and the common-mode noise filter capacitors can be installed in the form of integrated capacitor assemblies and / or independent single capacitors, and the common-mode noise filter capacitors can be connected to the housing of the electric drive system through a wider copper bus, thereby reducing the volume occupied by the differential-mode noise filter capacitors and the common-mode noise filter capacitors.

[0071] In some non-limiting embodiments, the electric drive system provided in the first aspect of the present invention may be configured in the electric vehicle provided in the present invention, the electric vehicle further includes a battery, and the electric vehicle may be connected to an external charging device. The electric vehicle may also be configured with a control device, and the control of the electric drive system is achieved through the configured control device.

[0072] like Figure 2 As shown, the electric drive system 200 may further include a relay K1 disposed on the third branch 233. The working mode of the electric drive system 200 is adjusted by controlling the switch of the relay K1. Here, the working mode of the electric drive system 200 may include a torque output mode and a boost charging mode.

[0073] In response to the torque output signal, the control device can adjust the electric drive system 200 to the torque output mode. In the torque output mode, the relay K1 is in the disconnected state. In this way, when the electric vehicle is not connected to the charging device, the capacitors and other devices in the internal circuit of the electric drive system 200 can be protected from failure. The third port 203 is not connected to the charging device 320, that is, the positive pole of the charging port is not connected to the charging device 320. The electric drive system 200 is powered by the battery 310, and the first differential mode noise filter capacitor (X1 capacitor and X2 capacitor) connected across the first branch 231 and the second branch 232 suppresses the differential mode noise of the power supply port; the common mode noise filter capacitor (Y1 capacitor, Y2 capacitor, Y3 capacitor and Y4 capacitor) connected to the first branch and the second branch and the first common mode inductor 221 suppress the common mode noise of the power supply port.

[0074] Further, in the torque output mode, the second differential mode noise filter capacitor and the common mode noise filter capacitor connected to the third branch are connected in series, for example Figure 2 The X3 capacitor and the Y5 capacitor, the X4 capacitor and the Y6 capacitor are shown. Through the second differential mode noise filter capacitor and the common mode noise filter capacitor connected in series, the electric drive system 200 can also provide common mode noise suppression for the negative pole of the power supply port, and further improve the common mode noise suppression performance of the first filter 220 on the basis of filter integration.

[0075] In response to the boost charging signal, the electric drive system 200 switches to the boost charging mode. In the boost charging mode, the relay K1 is in a closed state. In this way, the charging port and the charging device 320 are connected. The charging device 320 inputs current into the electric drive system 200, and after the current is boosted, it is output to the battery 310 at the power supply port to charge the battery 310.

[0076] The differential-mode noise filter capacitor of the first common-mode inductor 221 provides differential-mode noise suppression for the positive electrode of the power supply port, the first port 201 and the positive electrode of the charging port, that is, the differential-mode noise filter capacitor provides differential-mode noise suppression for both the power supply port and the charging port; the common-mode noise filter capacitor connected to the first branch, the second branch and the third branch and the first common-mode inductor 221 provide common-mode noise suppression for the positive electrode of the power supply port, the first port 201 and the positive electrode of the charging port.

[0077] Specifically, in Figure 2 In the illustrated embodiment, in the boost charging mode, the X1 capacitor, X2 capacitor, X3 capacitor, and X4 capacitor provide differential-mode noise suppression for the power supply port and the charging port; and the Y1 capacitor, Y2 capacitor, Y3 capacitor, Y4 capacitor, Y5 capacitor, and Y6 capacitor provide common-mode noise suppression for the power supply port and the charging port.

[0078] Therefore, the electric drive system 200 integrates the filter of the charging port and the filter of the power supply port by sharing the negative pole of the power supply port and the negative pole of the charging port. The power supply port and the charging port share the same magnetic core, thereby integrating the two filters into a first filter 220, which greatly reduces the cost and volume of the filter in the electric drive system. Moreover, compared with the prior art, the first filter 220 also reduces the use of at least 2 Y capacitors, thereby making the filter smaller and lower in cost.

[0079] Please refer to Figure 3 , Figure 3 A local topological circuit diagram of an electric drive system provided according to some embodiments of the present invention is shown.

[0080] like Figure 3 As shown, the branch extending from the negative pole 412 of the power supply port to the inside of the electric drive system 400 and the branch extending from the negative pole 422 of the charging port to the inside of the electric drive system 400 can be connected to the common first port 401. The second filter 430 is set between the positive pole 421 of the charging port and the negative pole 422 of the charging port before the first port 401 to further filter and suppress noise of the charging port, so as to achieve the higher electromagnetic compatibility standards required by the charging port (such as ECER10 conducted emission requirements). Here, the second filter 430 can be an LCL type filter, that is, a filter with two groups of inductors (L) and one group of capacitors (C).

[0081] Please refer to Figure 4 , Figure 4 A local topological circuit diagram of an electric drive system provided according to some embodiments of the present invention is shown.

[0082] like Figure 4As shown, on the basis of the electric drive system 200, the electric drive system 500 may include a second common mode inductor 520 in addition to the first common mode inductor 510. The second common mode inductor 520 may be arranged before the front stage of the first common mode inductor 510, and the first branch 531, the second branch 532 and the third branch 533 pass through the same magnetic core of the second common mode inductor 520, and pass through the magnetic core of the first common mode inductor 510 at the same time. The front stage of the second common mode inductor 520 may also include a differential mode noise filter capacitor and a common mode noise filter capacitor located between the positive and negative poles of the charging port, that is, between the second branch 532 and the third branch 533. Here, the differential mode noise filter capacitor may be an X capacitor, and the common mode noise filter capacitor may be a Y capacitor. Thus, the electric drive system 500 can further suppress common mode noise on the charging port and the power supply port. At the same time, by adding differential mode noise filter capacitors and common mode noise filter capacitors between the positive pole of the charging port and the negative pole of the charging port, the charging port can be further filtered and noise suppressed, thereby achieving the higher electromagnetic compatibility standards required for the charging port.

[0083] like Figure 3 , Figure 4 As shown, the first filter 220 may not be limited to the CLC three-level filter circuit, and the number and installation form of the capacitors of the first filter 220 may also be adjusted according to actual conditions, for example, Figure 3 , Figure 4 In the embodiment shown, the number of common-mode noise filter capacitors (Y capacitors) of the first common-mode inductor of the first filter can be 9. Therefore, Figure 2 The illustrated embodiment is only a non-limiting embodiment provided by the present invention, and is intended to clearly illustrate the main concept of the present invention and provide a specific solution that is convenient for the public to implement, rather than to limit the protection scope of the present invention.

[0084] In summary, the electric drive system provided by the present invention has a highly integrated filter, which can reduce the volume and cost of the filter and the electric drive system including the filter while meeting the EMC performance.

[0085] Although the above control methods are illustrated or described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0086] Those skilled in the art will appreciate that information, signals, and data may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips cited throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0087] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. The technician may implement the described functionality in different ways for each specific application, but such implementation decisions should not be interpreted as resulting in a departure from the scope of the present invention.

[0088] The control device in the above embodiment may include a controller, although the controller can be implemented by a combination of software and hardware. However, it is understood that the controller can also be implemented in software and hardware. For hardware implementation, the controller can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, other electronic devices for performing the above functions, or a selection combination of the above devices. For software implementation, the controller can be implemented by independent software modules such as procedures and functions running on a general-purpose chip, each of which performs one or more functions and operations described herein.

[0089] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in cooperation with a DSP core, or any other such configuration.

[0090] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components.

[0091] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one place to another. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0092] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric drive system, comprising a motor and a first filter, characterized in that: The negative pole of the power supply port and the negative pole of the charging port share the first port of the electric drive system, and the first branch, the second branch and the third branch extending from the positive pole of the power supply port, the first port and the positive pole of the charging port to the motor inside the electric drive system pass through the same magnetic core of the first common-mode inductor of the first filter.

2. The electric drive system according to claim 1, characterized in that: The front stage and the rear stage of the first common mode inductor include a differential mode noise filter capacitor and a common mode noise filter capacitor.

3. The electric drive system according to claim 2, characterized in that: The differential mode noise filter capacitor and the common mode noise filter capacitor are integrated capacitor components and / or independent single capacitors.

4. The electric drive system according to claim 2, characterized in that: A first end of the common-mode noise filter capacitor is connected to the first branch, the second branch or the third branch, and a second end of the common-mode noise filter capacitor is connected to a housing of the electric drive system.

5. The electric drive system according to claim 4, characterized in that: The differential mode noise filter capacitor comprises a first differential mode noise filter capacitor connected between the positive electrode and the negative electrode of the power supply port and a second differential mode noise filter capacitor connected between the positive electrode and the negative electrode of the charging port.

6. The electric drive system according to claim 5, characterized in that: The second end of the first differential mode noise filter capacitor and the second end of the second differential mode noise filter capacitor are connected to the second branch.

7. The electric drive system according to claim 6, characterized in that: In the torque output mode, the second differential mode noise filter capacitor and the common mode noise filter capacitor connected to the third branch are connected in series.

8. The electric drive system according to claim 1, characterized in that: A second filter is provided between the positive pole and the negative pole of the charging port.

9. The electric drive system according to claim 1, characterized in that: It also includes a second common-mode inductor, which is arranged before the front stage of the first common-mode inductor, the first branch, the second branch and the third branch pass through the same magnetic core of the second common-mode inductor, and the front stage of the second common-mode inductor includes a differential-mode noise filter capacitor and a common-mode noise filter capacitor located between the positive and negative poles of the charging port.

10. The electric drive system according to claim 1, characterized in that: The third branch is provided with a relay, and the relay realizes a torque output mode when it is in an open state, and realizes a boost charging mode when it is in a closed state.

11. The electric drive system according to claim 1, characterized in that: The motor is a three-phase motor.

12. The electric drive system according to claim 1, characterized in that: The power supply port is connected to a battery, the charging port is connected to a charging device, and the charging device includes a charging pile.

13. An electric vehicle, characterized in that: The invention comprises a battery and an electric drive system as claimed in any one of claims 1 to 12.

Images