Electric drive control system and control method, electric drive system, vehicle and device

Abstract

The invention provides an electric drive control system and method, an electric drive system, a vehicle and a device, and relates to the technical field of vehicles. The electric drive control system comprises an inverter, a first switch, a second switch and a third switch, the inverter comprises a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit, and the motor comprises a first winding and a second winding. Based on the motor with the first winding and the second winding, different connection modes among different windings of the motor can be realized by controlling the working modes of the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit; the electric drive control system can automatically adjust the connection mode of the motor winding by controlling corresponding parts under different working conditions of the vehicle, so that the high-efficiency and low-cost vehicle electric drive control system is realized under the condition of not depending on a complex mechanical structure, and the requirements of the vehicle on power output under different working conditions are met.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an electric drive control system and control method, an electric drive system, a vehicle, a device, an electronic device, and a storage medium. Background Art

[0002] Electric drive control system is one of the important areas of development of new energy vehicle technology and an important component of new energy vehicles.

[0003] In order to meet the high torque demand of the vehicle when climbing a hill at low speed and the power requirement when driving at high speed, the existing electric drive control system usually adopts a mechanical shifting scheme of the motor and the gearbox, which adapts to different working conditions of the vehicle by shifting gears. However, due to reasons such as the complex structure of the gearbox, the mechanical shifting scheme has obvious shortcomings, such as complex structure, low system efficiency, large space occupation, high maintenance difficulty, etc. These problems limit the further development of electric vehicles in terms of structural optimization, efficiency improvement and cost control. Summary of the invention

[0004] The problem solved by the present invention is: how to realize a high-efficiency, low-cost vehicle electric drive control system without relying on a complex mechanical structure to meet the vehicle's power output requirements under different working conditions.

[0005] In order to solve the above problems, the present invention provides an electric drive control system and control method, an electric drive system, a vehicle, a device, an electronic device, and a storage medium.

[0006] In a first aspect, the present invention provides an electric drive control system, comprising an inverter, a first switch, a second switch and a third switch, wherein the inverter is used to be electrically connected to the motor of the electric drive system; the inverter comprises a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit, the motor comprises a first winding and a second winding, the first winding comprises a U-phase winding, a V-phase winding and a W-phase winding, and the second winding comprises a U'-phase winding, a V'-phase winding and a W'-phase winding; one end of the U-phase winding, one end of the V-phase winding and one end of the W-phase winding are respectively connected to the corresponding bridge arms of the first three-phase full-bridge inverter circuit The other end of the V-phase winding is connected to the other end of the U-phase winding through the first switch, and is connected to the other end of the W-phase winding through the second switch; one end of the U'-phase winding, one end of the V'-phase winding and one end of the W'-phase winding are respectively connected to the midpoints of the bridge arms of the corresponding bridge arms of the second three-phase full-bridge inverter circuit, the other end of the U'-phase winding is connected between the U-phase winding and the first switch, the other end of the V'-phase winding is connected between the V-phase winding and the first switch, and the other end of the W'-phase winding is connected between the W-phase winding and the second switch;

[0007] Wherein, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through the third switch, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit; or, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through the third switch; or, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through one of the third switches, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through another of the third switches;

[0008] The first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are used to operate in a preset working mode so that the first winding and the second winding of the motor operate in a preset winding connection structure.

[0009] In a second aspect, the present invention provides a control method of an electric drive control system, based on the electric drive control system as described in the first aspect; the control method of the electric drive control system comprises:

[0010] According to the acquired operating status of the vehicle, the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system are controlled to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate according to a preset winding connection structure.

[0011] Optionally, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0012] When the vehicle speed is greater than 0 and less than a first preset speed, the first switch and the second switch are controlled to be disconnected, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to short-circuit one end of the U' phase winding, the V' phase winding and the W' phase winding of the second winding for connecting to the second three-phase full-bridge inverter circuit, so that the U phase winding is connected in series with the U' phase winding, the V phase winding is connected in series with the V' phase winding, and the W phase winding is connected in series with the W' phase winding, and the U phase winding and the U' phase winding, the V phase winding and the V' phase winding, and the W phase winding and the W' phase winding connected in series are star-connected.

[0013] Optionally, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0014] When the vehicle speed is greater than or equal to a first preset speed and less than a second preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to disconnect the electrical connection between the U' phase winding, the V' phase winding and the W' phase winding of the second winding, so that the U phase winding, the V phase winding and the W phase winding are star-connected.

[0015] Optionally, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0016] When the vehicle speed is greater than or equal to the second preset speed and less than the third preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly, so that the U-phase winding, the V-phase winding and the W-phase winding are star-connected, the U'-phase winding, the V'-phase winding and the W'-phase winding are star-connected, and the first winding and the second winding share a neutral point.

[0017] Optionally, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0018] When the vehicle speed is greater than or equal to the third preset speed and less than the fourth preset speed, the first switch and the second switch are controlled to be disconnected, and the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are controlled accordingly, so that the U-phase winding is connected in series with the U'-phase winding, the V-phase winding is connected in series with the V'-phase winding, and the W-phase winding is connected in series with the W'-phase winding, and the series-connected U-phase winding and the U'-phase winding, the series-connected V-phase winding and the V'-phase winding, and the series-connected W-phase winding and the W'-phase winding are connected in a triangle.

[0019] In a third aspect, the present invention provides an electric drive system, comprising a motor, a reducer and an electric drive control system as described in the first aspect, wherein the electric drive control system is used to control the motor so that the first winding and the second winding of the motor operate according to a preset winding connection structure; the motor is used to drive the reducer.

[0020] In a fourth aspect, the present invention provides a vehicle, comprising the electric drive control system as described in the first aspect, or the electric drive system as described in the third aspect.

[0021] In a fifth aspect, the present invention provides a control device of an electric drive control system, based on the electric drive control system as described in the first aspect; the control device of the electric drive control system comprises:

[0022] A control unit is used to control the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired operating status of the vehicle, and operate according to a preset working mode, so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate according to a preset winding connection structure.

[0023] In a sixth aspect, the present invention provides an electronic device, comprising a memory and a processor;

[0024] The memory is used to store computer programs;

[0025] The processor is used to implement the control method of the electric drive control system as described in the second aspect when executing the computer program.

[0026] In a seventh aspect, the present invention provides a computer-readable storage medium storing a computer program. When the computer program is read and executed by a processor, the control method of the electric drive control system as described in the second aspect is implemented.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the electric drive control system of the present invention is based on a motor having a first winding and a second winding, and by controlling the working modes of the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit, different connection modes between different windings of the motor can be realized, so that the electric drive control system can automatically adjust the connection mode of the motor windings by controlling the corresponding components under different working conditions (or operating states) of the vehicle, thereby optimizing the power output of the vehicle, meeting the diversified needs of the vehicle for power output, improving the flexibility and efficiency of the control of the electric drive control system, and improving the overall operating efficiency (or energy efficiency) and performance of the electric drive control system, the motor and the vehicle in which the electric drive control system is located. In addition, the electric drive control system has the characteristics of simple overall structure, low cost, and easy implementation, reducing the complexity and cost brought by relying on the traditional mechanical shifting system, and effectively improving the cost performance of the electric drive control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of an electric drive system in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the structure of an electric drive system in an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of an electric drive system in an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of a structure in which a first winding and a second winding are connected in an embodiment of the present invention;

[0032] Figure 5 is a structural block diagram of a control device of an electric drive control system in an embodiment of the present invention;

[0033] Figure 6 Schematic diagram of the structure of the memory and processor of the electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0036] Combination Figure 1-Figure 3 As shown, an embodiment of the present invention provides an electric drive control system, including an inverter, a first switch, a second switch and a third switch, the inverter is used to be electrically connected to the motor of the electric drive system; the inverter includes a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit, the motor includes a first winding and a second winding, the first winding includes a U-phase winding, a V-phase winding and a W-phase winding, and the second winding includes a U'-phase winding, a V'-phase winding and a W'-phase winding; one end of the U-phase winding, one end of the V-phase winding and one end of the W-phase winding are respectively connected to the first three-phase full-bridge inverter circuit The other end of the V-phase winding is connected to the other end of the U-phase winding through the first switch K1, and is connected to the other end of the W-phase winding through the second switch; one end of the U'-phase winding, one end of the V'-phase winding and one end of the W'-phase winding are respectively connected to the midpoints of the bridge arms of the corresponding bridge arms of the second three-phase full-bridge inverter circuit, the other end of the U'-phase winding is connected between the U-phase winding and the first switch K1, the other end of the V'-phase winding is connected between the V-phase winding and the first switch K1, and the other end of the W'-phase winding is connected between the W-phase winding and the second switch;

[0037] Wherein, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through the third switch, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit; or, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through the third switch; or, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through a third switch, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through another third switch;

[0038] The first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are used to operate in a preset working mode so that the first winding and the second winding of the motor operate in a preset winding connection structure.

[0039] In this embodiment, the electric drive system includes components such as an electric drive control system, a power battery and a motor; the electric drive control system is used to realize the control and drive of the motor, and its inverter, motor controller and other components. In the electric drive system, the power battery, the inverter and the motor and other components are electrically connected in sequence, and the inverter is used to realize the bidirectional conversion of electric energy between the power battery and the motor. For example, when the power battery supplies power to the motor through the inverter, the inverter is used to convert the direct current output by the power battery into the alternating current required by the motor; when the motor reversely charges the power battery through the inverter, the inverter is used to convert the alternating current output by the motor into the direct current required by the power battery. Among them, the inverter includes a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit, which are used as an inverter circuit when the power battery supplies power to the motor through the inverter, and as a rectifier circuit when the motor reversely charges the power battery through the inverter, so as to realize the bidirectional and efficient conversion of electric energy in the electric drive system.

[0040] The motor includes a first winding and a second winding, both of which are three-phase windings, the first winding includes a U-phase winding, a V-phase winding and a W-phase winding, and the second winding includes a U'-phase winding, a V'-phase winding and a W'-phase winding. Two three-phase full-bridge inverter circuits (a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit) are connected to the double windings (the first winding and the second winding) of the motor. Specifically, one end of the U-phase winding, one end of the V-phase winding and one end of the W-phase winding are respectively connected to the midpoints of the bridge arms of the corresponding bridge arms of the first three-phase full-bridge inverter circuit (such as Figure 1 As shown, the midpoint of the bridge arm is the connection point of the two power modules on the corresponding bridge arm of the first three-phase full-bridge inverter circuit), that is, one end of the U-phase winding is connected to the power modules (or switch elements, which can be IGBT or MOSFET, etc.) S1 and S4 of the first three-phase full-bridge inverter circuit, one end of the V-phase winding is connected to the power modules S2 and S5, and one end of the W-phase winding is connected to the power modules S3 and S6; the other end of the V-phase winding is connected to the other end of the U-phase winding through the first switch K1, and is connected to the other end of the W-phase winding through the second switch K2; one end of the U'-phase winding, one end of the V'-phase winding and one end of the W'-phase winding are respectively connected to the midpoint of the bridge arm of the corresponding bridge arm of the second three-phase full-bridge inverter circuit (as shown in FIG. Figure 1 As shown, the midpoint of the bridge arm is the connection point of the two power modules on the corresponding bridge arm of the second three-phase full-bridge inverter circuit), that is, one end of the U'-phase winding is connected between the power modules S7 and S10 of the second three-phase full-bridge inverter circuit, one end of the V'-phase winding is connected between the power modules S8 and S11, and one end of the W'-phase winding is connected between the power modules S9 and S12; the other end of the U'-phase winding is connected between the U-phase winding and the first switch K1, the other end of the V'-phase winding is connected between the V-phase winding and the first switch K1, and the other end of the W'-phase winding is connected between the W-phase winding and the second switch K2.

[0041] Moreover, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit both have a first end for connecting to the positive electrode of a power source (such as a power battery), and a second end for connecting to the negative electrode of the power source. Figure 1 As shown, the common connection point of the power modules S1, S2, and S3 of the first three-phase full-bridge inverter circuit serves as the first end of the first three-phase full-bridge inverter circuit, and the common connection point of the power modules S4, S5, and S6 of the first three-phase full-bridge inverter circuit serves as the second end of the first three-phase full-bridge inverter circuit; the common connection point of the power modules S7, S8, and S9 of the second three-phase full-bridge inverter circuit serves as the first end of the second three-phase full-bridge inverter circuit, and the common connection point of the power modules S10, S11, and S12 of the second three-phase full-bridge inverter circuit serves as the second end of the second three-phase full-bridge inverter circuit. In the electric drive control system, as Figure 2 As shown, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through the third switch K3, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit; or, Figure 1 As shown, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through the third switch K3; or, Figure 3 As shown, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through a third switch K3, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through another third switch K3.

[0042] Based on the above-mentioned first switch K1, second switch K2, third switch K3, first three-phase full-bridge inverter circuit and second three-phase full-bridge inverter circuit, the electric drive control system can control the working mode of the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit, such as by controlling the on-off of the first switch, the second switch and the third switch, and controlling the on-off of corresponding switching elements in the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit, to achieve different connection modes between different windings of the motor (such as series connection and parallel connection of the first winding and the second winding and star connection and triangle connection of the motor windings) to cope with different working conditions of the vehicle and meet the power output requirements of the vehicle under different working conditions.

[0043] In this way, based on the motor having the first winding and the second winding, by controlling the working modes of the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system, different connection modes between different windings of the motor can be realized, so that the electric drive control system can automatically adjust the connection mode of the motor windings by controlling the corresponding components under different working conditions (or operating states) of the vehicle, thereby optimizing the power output of the vehicle, meeting the diversified power output requirements of the vehicle, improving the flexibility and efficiency of the control of the electric drive control system, and improving the overall operating efficiency (or energy efficiency) and performance of the electric drive control system, the motor and the vehicle in which the electric drive control system is located. In addition, the electric drive control system has the characteristics of simple overall structure, low cost, and easy implementation, which reduces the complexity and cost brought by relying on the traditional mechanical shifting system and effectively improves the cost performance of the electric drive control system.

[0044] Optionally, combined Figure 1-Figure 3 As shown, the electric drive system where the electric drive control system is located also includes a power battery, the positive electrode of the power battery is connected to the first end of the first three-phase full-bridge inverter circuit, and the negative electrode of the power battery is connected to the second end of the first three-phase full-bridge inverter circuit.

[0045] In this embodiment, the electric drive system includes a power battery, which is used to power the motor through an inverter (or to store the electric energy of reverse charging of the motor). When the power battery supplies power to the motor through the inverter, the DC power output by the power battery is transmitted to the inverter, and the inverter converts the DC power into the three-phase AC power required by the motor to power the motor. Figure 1-Figure 3 As shown, the positive electrode of the power battery is connected to the first end of the first three-phase full-bridge inverter circuit, and the negative electrode of the power battery is connected to the second end of the first three-phase full-bridge inverter circuit.

[0046] It is worth noting that, for ease of understanding, in the embodiment of the present invention, based on the positive electrode of the power battery being connected to the first end of the first three-phase full-bridge inverter circuit, and the negative electrode of the power battery being connected to the second end of the first three-phase full-bridge inverter circuit, the control method of the electric drive control system (described later) is exemplarily described, and it is not a restriction on the connection relationship between the inverter and the power battery. For example, in other embodiments, the positive electrode of the power battery may be connected to the first end of the second three-phase full-bridge inverter circuit, and the negative electrode of the power battery may be connected to the second end of the second three-phase full-bridge inverter circuit. At this time, the control of the electric drive control system can be obtained according to the control method of the electric drive control system when "the positive electrode of the power battery is connected to the first end of the first three-phase full-bridge inverter circuit, and the negative electrode of the power battery is connected to the second end of the first three-phase full-bridge inverter circuit".

[0047] Optionally, combined Figure 1-Figure 3As shown, the electric drive system includes a power battery, and the inverter also includes a bus capacitor, and the two ends of the bus capacitor are respectively connected to the positive electrode and the negative electrode of the power battery.

[0048] In this embodiment, the inverter also includes a bus capacitor connected in parallel at both ends of the power battery, that is, the two ends of the bus capacitor are respectively connected to the positive and negative electrodes of the power battery, which can play a role in electric energy storage and filtering, so that the bus capacitor can effectively smooth the DC voltage, reduce voltage fluctuations and ripples, thereby stabilizing the voltage at the input end of the inverter, ensuring that the inverter can stably and smoothly convert DC power into AC power, etc.

[0049] In this way, the power battery and bus capacitor can provide a more stable voltage input for the motor, improving the stability of the electric drive control system and the electric drive system, as well as the power conversion efficiency.

[0050] Optionally, the electric drive control system further includes a motor controller, and at least one of the first switch, the second switch and the third switch is communicatively connected to the motor controller.

[0051] In this embodiment, the motor controller serves as the core control unit of the electric drive control system, and is used to receive data (such as speed, torque requirements, etc.) from other systems, control units or sensors of the vehicle, and adjust the operating mode (or operating state) of the inverter, motor, etc. according to the current working conditions and requirements. Thereby accurately controlling the operating mode of the motor. Specifically, the motor controller is connected to the controlled end of at least one of the first switch, the second switch and the third switch through the corresponding communication interface to realize the control of the corresponding switch. For example, the motor controller adjusts the operating mode of these switches (i.e., adjusts the on-off state of these switches) in real time and dynamically according to the requirements of the vehicle under different working conditions (such as acceleration, deceleration, low speed, high speed, etc.), changes the connection method of the motor winding, and thus optimizes the working mode of the motor. In this way, the automation and intelligence level of the electric drive control system are improved.

[0052] Optionally, the motor controller may directly control the corresponding switch, or control the corresponding switch through other components (such as an inverter).

[0053] Combination Figure 1-Figure 3 As shown, another embodiment of the present invention provides a control method of an electric drive control system, based on the above electric drive control system; the control method of the electric drive control system includes:

[0054] According to the acquired operating status of the vehicle, the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system are controlled to operate in a preset working mode so that the first winding and the second winding of the motor of the vehicle's electric drive system operate according to a preset winding connection structure.

[0055] Specifically, the current running state of the vehicle is obtained, and according to the obtained running state of the vehicle, the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system are controlled to operate in a preset working mode (recorded as the preset working mode), so that the motor operates in a motor winding connection mode suitable for the current running state of the vehicle, and each inverter circuit of the inverter operates in a working mode suitable for the current running state of the vehicle, thereby optimizing the power output of the vehicle and meeting the diversified power output requirements of the vehicle. For example, by controlling the working mode of the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit, such as by controlling the on and off of the first switch, the second switch and the third switch, and controlling the on and off of the corresponding switch elements in the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit, different preset winding connection structures of the motor can be realized to cope with different working conditions of the vehicle and meet the power output requirements of the vehicle under different working conditions. Exemplarily, the preset winding connection structure includes: the U-phase winding, V-phase winding and W-phase winding of the first winding are star-connected, and the U'-phase winding, V'-phase winding and W'-phase winding of the second winding are star-connected; and the U-phase winding, V-phase winding and W-phase winding are star-connected; and the U-phase winding and the U'-phase winding, the V-phase winding and the V'-phase winding, and the W-phase winding are star-connected in series; and the U-phase winding and the U'-phase winding, the V-phase winding and the V'-phase winding, and the W-phase winding are triangle-connected in series.

[0056] In this way, based on the electric drive control system with a simple structure, not only the high efficiency and low cost of the vehicle electric drive control system are achieved, but also the entire electric drive control system and the electric drive system where the electric drive control system is located can operate efficiently under different operating conditions, and achieve the optimal power output matching with low control cost and complexity, thereby improving the comprehensive performance of the electric drive control system and the electric drive system where it is located, and also enabling the electric drive control system and the electric drive system where it is located to flexibly adjust the power output of the motor under different working conditions to meet the corresponding power requirements, and effectively reduce the control difficulty and cost of the electric drive control system, the motor and the electric drive system where it is located. Moreover, by pre-setting the corresponding preset working mode, the operating mode suitable for the current working condition can be automatically matched according to the current operating state of the vehicle that has been obtained. On the one hand, while realizing the precise control of the motor winding structure, the control efficiency of the motor is improved; on the other hand, the motor winding can be operated with a preset winding connection structure that is compatible with the current operating state of the vehicle, thereby optimizing the operating efficiency and performance of the motor.

[0057] Optionally, the operating state of the vehicle includes operating parameters such as vehicle speed.

[0058] Optionally, according to the acquired running state of the vehicle, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0059] When the vehicle speed is greater than 0 and less than a first preset speed, the first switch and the second switch are controlled to be disconnected, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to short-circuit one end of the U' phase winding, the V' phase winding and the W' phase winding of the second winding for connecting to the second three-phase full-bridge inverter circuit, so that the U phase winding is connected in series with the U' phase winding, the V phase winding is connected in series with the V' phase winding, and the W phase winding is connected in series with the W' phase winding, and the series-connected U phase winding and U' phase winding, the series-connected V phase winding and V' phase winding, and the series-connected W phase winding and W' phase winding are connected in star shape.

[0060] Specifically, when the vehicle speed is in a low speed state, that is, the vehicle speed is greater than 0 and less than a first preset speed, the first switch and the second switch are controlled to be disconnected to realize the series connection of the first winding and the second winding, that is, the U-phase winding is connected in series with the U'-phase winding, the V-phase winding is connected in series with the V'-phase winding, and the W-phase winding is connected in series with the W'-phase winding; and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to short-circuit the U'-phase winding, the V'-phase winding and the W'-phase winding for connection to one end of the second three-phase full-bridge inverter circuit to realize the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding, and the three are connected in star shape; the first three-phase full-bridge inverter circuit is controlled to operate normally to provide stable power supply to the star-connected motor windings through the first three-phase full-bridge inverter circuit. In this way, the number of effective windings of the motor is increased, so that the motor can output a higher constant torque when running at low speed, that is, the power output of the motor at low speed is enhanced to meet the vehicle's demand for high torque when starting and driving at low speed.

[0061] For example, for Figure 1 The electric drive control system shown in the figure disconnects K1, K2 and K3 when the vehicle is started and running at a low speed, controls the first three-phase full-bridge inverter circuit to work normally, and controls the power modules (or switching elements; IGBT or MOSFET, etc. can be used) S10, S11 and S12 of the lower three bridges of the second three-phase full-bridge inverter circuit to be turned on at the same time (i.e., the lower three bridges are short-circuited); at this time, the winding of each phase of the motor is composed of the windings of the corresponding phases of the first winding and the second winding in series, realizing the short circuit of H, I, and J points to form the neutral point of the motor winding, and the three-phase winding of the motor forms a star connection with double windings in series. For example Figure 2The electric drive control system shown in the figure disconnects K1, K2 and K3 when the vehicle is started and running at a low speed, controls the normal operation of the first three-phase full-bridge inverter circuit, and controls the power modules S7, S8 and S9 of the upper three bridges of the second three-phase full-bridge inverter circuit to be turned on at the same time (i.e., the upper three bridges are short-circuited); at this time, the winding of each phase of the motor is composed of the windings of the corresponding phases of the first winding and the second winding in series, realizing the short circuit of the three points H, I, and J to form the neutral point of the motor winding, and the three-phase winding of the motor forms a star connection of double windings in series. For example Figure 3 The electric drive control system shown, when the vehicle is started and running at a low speed, disconnects K1, K2, and at least one of the two K3, controls the first three-phase full-bridge inverter circuit to work normally, and controls the upper three bridges or the lower three bridges of the second three-phase full-bridge inverter circuit to be short-circuited; at this time, the winding of each phase of the motor is composed of the windings of the corresponding phases of the first winding and the second winding in series, realizing the short circuit of the three points H, I, and J to form the neutral point of the motor winding, and the three-phase winding of the motor forms a star connection of double windings in series.

[0062] Optionally, according to the acquired running state of the vehicle, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0063] When the vehicle speed is greater than or equal to the first preset speed and less than the second preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to disconnect the electrical connection between the U' phase winding, the V' phase winding and the W' phase winding of the second winding, so that the U phase winding, the V phase winding and the W phase winding are star-connected.

[0064] Specifically, when the vehicle speed is in a medium or low speed state, that is, the vehicle speed is greater than or equal to the first preset speed and less than the second preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to disconnect the electrical connection between the U' phase winding, the V' phase winding and the W' phase winding, so that in each phase of the motor, only the first winding is connected to the circuit, and the second winding is not connected to the circuit. At this time, the U phase winding, V phase winding and W phase winding of the first winding are star-connected.

[0065] In this way, when the vehicle is traveling at medium and low speeds, the motor power required by the vehicle is relatively low, and only the first winding is used, which can reduce inductance and copper loss, ensuring that the motor operates in a high efficiency range; by disconnecting the second winding, the excessive increase in winding inductance and the resulting energy loss are effectively avoided, further improving the overall energy efficiency of the motor; the star connection method of the first winding ensures uniform distribution of three-phase current, reduces instability problems of the electric drive control system and the motor caused by current imbalance, and ensures smooth operation of the vehicle at medium and low speeds; and by reducing unnecessary winding access, the complexity and loss of the electric drive control system and motor control are reduced, thereby improving the stability and reliability of the electric drive control system and the motor, and extending the service life of the motor.

[0066] For example, for Figure 1 The electric drive control system shown in the figure, when the vehicle is running at a medium or low speed, controls K1 and K2 to be closed, K3 to be disconnected, the second three-phase full-bridge inverter circuit does not work, and the first three-phase full-bridge inverter circuit works normally; at this time, in each phase of the motor, only the first winding is connected to the circuit, the second winding is not connected to the circuit, E, F, G three points are short-circuited to form the neutral point of the motor winding, that is, the motor winding used at this time is the first winding using the star connection method. For example Figure 2 The electric drive control system shown in the figure, when the vehicle is running at a medium or low speed, controls K1 and K2 to be closed, K3 to be disconnected, the second three-phase full-bridge inverter circuit does not work, and the first three-phase full-bridge inverter circuit works normally; at this time, in each phase of the motor, only the first winding is connected to the circuit, the second winding is not connected to the circuit, E, F, G three points are short-circuited to form the neutral point of the motor winding, that is, the motor winding used at this time is the first winding using the star connection method. For example Figure 3 The electric drive control system shown in the figure, when the vehicle is running at a medium or low speed, controls K1 and K2 to close, and disconnects at least one of the two K3, the second three-phase full-bridge inverter circuit does not work, and the first three-phase full-bridge inverter circuit works normally; at this time, in each phase of the motor, only the first winding is connected to the circuit, the second winding is not connected to the circuit, E, F, G three points are short-circuited to form the neutral point of the motor winding, that is, the motor winding used at this time is the first winding using a star connection. In some embodiments, for example Figure 3 The electric drive control system shown, when the vehicle is traveling at a medium or low speed, controls K1 and K2 to be closed, and the two K3s can be closed, and the second three-phase full-bridge inverter circuit does not work (such as all the power modules of the second three-phase full-bridge inverter circuit are disconnected), so as to achieve the disconnection of the electrical connection between the U' phase winding, the V' phase winding and the W' phase winding of the second winding; the first three-phase full-bridge inverter circuit works normally. At this time, in each phase of the motor, only the first winding is connected to the circuit, the second winding is not connected to the circuit, and the three points E, F, and G are short-circuited to form the neutral point of the motor winding, that is, the motor winding used at this time is the first winding using a star connection.

[0067] Optionally, according to the acquired running state of the vehicle, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0068] When the vehicle speed is greater than or equal to the second preset speed and less than the third preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly, so that the U-phase winding, the V-phase winding and the W-phase winding are star-connected, the U'-phase winding, the V'-phase winding and the W'-phase winding are star-connected, and the first winding and the second winding share a neutral point.

[0069] Specifically, when the vehicle speed is in a medium-high speed state, that is, the vehicle speed is greater than or equal to the second preset speed and less than the third preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to realize the star connection of the first winding and the star connection of the second winding, and the first winding and the second winding share a neutral point. In this way, the first winding and the first three-phase full-bridge inverter circuit form a set of motor systems, and the second winding and the second three-phase full-bridge inverter circuit form another set of motor systems. The two motor systems are connected in parallel by sharing a neutral point to improve the power output of the motor in the medium-high speed state, effectively distribute the load, and reduce the current pressure when only a single motor system is used, thereby improving the energy transmission efficiency of the overall electric drive control system; and the first winding and the second winding are both star-connected to ensure that the current of each phase is balanced and the current is evenly distributed, thereby minimizing the current harmonics, and realizing efficient power conversion, avoiding local energy loss caused by uneven current.

[0070] In this way, the stability of the electric drive control system and the motor operation is improved, and the adverse effects caused by voltage fluctuations are reduced; and the parallel design also increases the redundancy of the system to a certain extent, so that when one motor system fails, the electric drive control system can still maintain some functions by driving another motor system, thereby improving the safety and reliability of the electric drive control system and the motor.

[0071] For example, for Figure 1The electric drive control system shown in the figure, when the vehicle is traveling at high speed, controls K1, K2, and K3 to be closed, and the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit to work normally; at this time, the first three-phase full-bridge inverter circuit and the winding L1 form a motor system, and the second three-phase full-bridge inverter circuit and the winding L2 form another motor system. The three points E, F, and G are short-circuited to form the neutral point of the motor winding. The two motor systems share the neutral point, and the three-phase windings of the motor form a star connection with two windings in parallel, that is, the first winding adopts a star connection, the second winding adopts a star connection, and the first winding is connected in parallel with the second winding. For example Figure 2 The electric drive control system shown in the figure, when the vehicle is traveling at high speed, controls K1, K2, and K3 to be closed, and the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit to work normally; at this time, the first three-phase full-bridge inverter circuit and the winding L1 form a motor system, and the second three-phase full-bridge inverter circuit and the winding L2 form another motor system. The three points E, F, and G are short-circuited to form the neutral point of the motor winding. The two motor systems share the neutral point, and the three-phase windings of the motor form a star connection with two windings in parallel, that is, the first winding adopts a star connection, the second winding adopts a star connection, and the first winding is connected in parallel with the second winding. For example Figure 2 The electric drive control system shown, when the vehicle is traveling at a medium and high speed, controls K1, K2 to be closed, and two K3s to be closed, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit both operate normally; at this time, the first three-phase full-bridge inverter circuit and the winding L1 form a motor system, the second three-phase full-bridge inverter circuit and the winding L2 form another motor system, E, F, and G are short-circuited to form the neutral point of the motor winding, the two motor systems share the neutral point, and the three-phase windings of the motor form a star connection with two windings in parallel, that is, the first winding adopts a star connection, the second winding adopts a star connection, and the first winding is connected in parallel with the second winding.

[0072] Optionally, according to the acquired running state of the vehicle, controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes:

[0073] When the vehicle speed is greater than or equal to the third preset speed and less than the fourth preset speed, the first switch and the second switch are controlled to be disconnected, and the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are controlled accordingly, so that the U-phase winding is connected in series with the U'-phase winding, the V-phase winding is connected in series with the V'-phase winding, and the W-phase winding is connected in series with the W'-phase winding, and the series-connected U-phase winding and U'-phase winding, the series-connected V-phase winding and V'-phase winding, and the series-connected W-phase winding and W'-phase winding are connected in a triangle.

[0074] Specifically, when the vehicle speed is in a high-speed state, that is, the vehicle speed is greater than or equal to the third preset speed and less than the fourth preset speed, the first switch and the second switch are controlled to be disconnected, and the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are controlled accordingly to realize the triangle connection of the U-phase winding and the U'-phase winding in series, the V-phase winding and the V'-phase winding in series, and the W-phase winding and the W'-phase winding in series. In this way, by connecting the U-phase winding and the U'-phase winding in series, the V-phase winding and the V'-phase winding in series, and the W-phase winding and the W'-phase winding in series, the voltage bearing capacity of the motor winding as a whole is increased, while the current is reduced, and the winding after the series connection effectively improves the voltage utilization rate under high-speed conditions, and can meet the requirements of high voltage and high power for high-speed driving; and by adopting a triangle connection, compared with a star connection, the triangle connection mode can increase the line voltage between the windings, so that the motor can achieve a greater output power under high-speed conditions, and can also effectively balance the current of each phase, and optimize the operating performance of the motor.

[0075] In this way, by connecting the motor windings in series and adopting a triangle connection at high speed, not only can the power output of the motor be effectively improved to meet the power requirements during high-speed driving, but it can also reduce energy loss, improve system efficiency, extend the service life of the motor and enhance the high-speed stability of the vehicle.

[0076] For example, for Figure 1 The electric drive control system shown in the figure, when the vehicle is running at high speed, controls K1, K2, K3 to be disconnected, and controls the closing or disconnection of the corresponding power modules when the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are running, so as to realize the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding, and the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding are connected in a triangle. For example, at a certain moment, S1, S5, S6 of the first three-phase full-bridge inverter circuit are closed, and S8, S10, S12 of the second three-phase full-bridge inverter circuit are closed, and the remaining power modules (or switch elements) are disconnected, that is, S2, S3, S4, S7, S9, S11 are disconnected; at this time, point A and point I are short-circuited, point B and point C are short-circuited, and point H and point J are short-circuited, and finally the following is formed. Figure 4 The triangle connection.

[0077] For Figure 2The electric drive control system shown in the figure, when the vehicle is running at high speed, controls K1, K2, K3 to be disconnected, and controls the closing or disconnection of the corresponding power modules when the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are running, so as to realize the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding, and the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding are connected in a triangle. For example, at a certain moment, S2, S3, S4 of the first three-phase full-bridge inverter circuit are closed, and S7, S9, S11 of the second three-phase full-bridge inverter circuit are closed, and the remaining power modules (or switch elements) are disconnected, that is, S1, S5, S6, S8, S10, S12 are disconnected; at this time, point A and point I are short-circuited, point B and point C are short-circuited, and point H and point J are short-circuited, and finally the following is formed. Figure 4 The triangle connection.

[0078] For Figure 3 The electric drive control system shown, when the vehicle is running at high speed, controls K1, K2 to be disconnected, controls one of the two K3 to be disconnected, and controls the closing or disconnection of the corresponding power modules when the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are running, so as to realize the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding, and the series connection of the U-phase winding and the U'-phase winding, the series connection of the V-phase winding and the V'-phase winding, and the series connection of the W-phase winding and the W'-phase winding are in a triangle connection.

[0079] Another embodiment of the present invention provides an electric drive system, including a motor, a reducer and the above-mentioned electric drive control system, the electric drive control system is used to control the motor so that the first winding and the second winding of the motor operate according to a preset winding connection structure; the motor is used to drive the reducer.

[0080] The electric drive system of this embodiment includes a motor, a reducer and the above-mentioned electric drive control system. The electric drive control system controls the motor so that the first winding and the second winding of the motor operate according to a preset winding connection structure, thereby driving the reducer connected to the motor to achieve power output. Among them, the electric drive system has the same advantages as the above-mentioned electric drive control system compared with the prior art, which will not be repeated here.

[0081] Another embodiment of the present invention provides a vehicle, comprising the above-mentioned electric drive control system, or, the above-mentioned electric drive system.

[0082] The vehicle of this embodiment includes the above-mentioned electric drive control system or electric drive system, which has the same advantages as the above-mentioned electric drive control system or electric drive system compared with the prior art, and will not be repeated here.

[0083] Combination Figure 5As shown, another embodiment of the present invention provides a control device of an electric drive control system, based on the above electric drive control system; the control device of the electric drive control system includes:

[0084] A control unit is used to control the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired operating status of the vehicle, and operate according to a preset working mode so that the first winding and the second winding of the motor of the vehicle's electric drive system operate according to a preset winding connection structure.

[0085] The control device of the electric drive control system of this embodiment is used to implement the control method of the electric drive control system described above. Its advantages over the prior art are the same as the advantages of the control method of the electric drive control system described above over the prior art, and will not be repeated here.

[0086] Optionally, the control device of the electric drive control system is specifically used to: when the vehicle speed is greater than 0 and less than a first preset speed, control the first switch and the second switch to disconnect, control the first three-phase full-bridge inverter circuit to operate normally, and correspondingly control the third switch and the second three-phase full-bridge inverter circuit to short-circuit the U' phase winding, V' phase winding and W' phase winding of the second winding for connecting to one end of the second three-phase full-bridge inverter circuit, so that the U phase winding is connected in series with the U' phase winding, the V phase winding is connected in series with the V' phase winding, and the W phase winding is connected in series with the W' phase winding, and the series-connected U phase winding and U' phase winding, the series-connected V phase winding and V' phase winding, and the series-connected W phase winding and W' phase winding are star-connected.

[0087] Optionally, the control device of the electric drive control system is specifically used to: when the vehicle speed is greater than or equal to a first preset speed and less than a second preset speed, control the first switch and the second switch to close, control the first three-phase full-bridge inverter circuit to operate normally, and correspondingly control the third switch and the second three-phase full-bridge inverter circuit to disconnect the electrical connection between the U' phase winding, V' phase winding and W' phase winding of the second winding, so that the U phase winding, V phase winding and W phase winding are star-connected.

[0088] Optionally, the control device of the electric drive control system is specifically used to: when the vehicle speed is greater than or equal to a second preset speed and less than a third preset speed, control the first switch and the second switch to close, control the first three-phase full-bridge inverter circuit to operate normally, and correspondingly control the third switch and the second three-phase full-bridge inverter circuit to enable the U-phase winding, the V-phase winding and the W-phase winding to be star-connected, the U'-phase winding, the V'-phase winding and the W'-phase winding to be star-connected, and the first winding and the second winding share a neutral point.

[0089] Optionally, the control device of the electric drive control system is specifically used to: when the vehicle speed is greater than or equal to a third preset speed and less than a fourth preset speed, control the first switch and the second switch to be disconnected, and correspondingly control the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit, so that the U-phase winding is connected in series with the U'-phase winding, the V-phase winding is connected in series with the V'-phase winding, and the W-phase winding is connected in series with the W'-phase winding, and the series-connected U-phase winding and U'-phase winding, the series-connected V-phase winding and V'-phase winding, and the series-connected W-phase winding and W'-phase winding are connected in a triangle.

[0090] Combination Figure 6 As shown, another embodiment of the present invention provides an electronic device, including a memory 601 and a processor 602;

[0091] Memory 601, used for storing computer programs;

[0092] The processor 602 is used to implement the control method of the electric drive control system when executing the computer program.

[0093] In other words, an electronic device includes a memory 601 and a processor 602 coupled to the memory 601; the memory 601 is configured to store a computer program; and the processor 602 is configured to perform the following operations when executing the computer program:

[0094] According to the acquired operating status of the vehicle, the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system are controlled to operate in a preset working mode so that the first winding and the second winding of the motor of the vehicle's electric drive system operate according to a preset winding connection structure.

[0095] The vehicle of this embodiment can be used to implement the control method of the electric drive control system described above, and its advantages over the prior art are the same as the advantages of the control method of the electric drive control system described above over the prior art, which will not be repeated here.

[0096] Another embodiment of the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is read and executed by a processor, the control method of the electric drive control system is implemented.

[0097] In other words, a non-volatile computer-readable storage medium stores a computer program, which, when executed by a processor, causes the processor to perform the following operations:

[0098] According to the acquired operating status of the vehicle, the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system are controlled to operate in a preset working mode so that the first winding and the second winding of the motor of the vehicle's electric drive system operate according to a preset winding connection structure.

[0099] The technical solution of the embodiment of the present invention, in essence or in other words, the part that contributes to the prior art, or the whole or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for making a computer device (which can be a personal computer, server, or network device, etc.) or a processor perform all or part of the steps of the method of the embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0100] The computer-readable storage medium of this embodiment can be used to implement the control method of the electric drive control system described above. Its advantages over the prior art are the same as the advantages of the control method of the electric drive control system described above over the prior art, and will not be repeated here.

[0101] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An electric drive control system, characterized in that: The invention comprises an inverter, a first switch, a second switch and a third switch, wherein the inverter is used to be electrically connected to the motor of the electric drive system; the inverter comprises a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit, the motor comprises a first winding and a second winding, the first winding comprises a U-phase winding, a V-phase winding and a W-phase winding, and the second winding comprises a U'-phase winding, a V'-phase winding and a W'-phase winding; one end of the U-phase winding, one end of the V-phase winding and one end of the W-phase winding are respectively connected to the midpoint of the bridge arm of the corresponding bridge arm of the first three-phase full-bridge inverter circuit, and the V-phase winding is connected to the bridge arm midpoint of the corresponding bridge arm of the first three-phase full-bridge inverter circuit. The other end of the group is connected to the other end of the U phase winding through the first switch, and is connected to the other end of the W phase winding through the second switch; one end of the U' phase winding, one end of the V' phase winding and one end of the W' phase winding are respectively connected to the midpoints of the bridge arms of the corresponding bridge arms of the second three-phase full-bridge inverter circuit, the other end of the U' phase winding is connected between the U phase winding and the first switch, the other end of the V' phase winding is connected between the V phase winding and the first switch, and the other end of the W' phase winding is connected between the W phase winding and the second switch; Wherein, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through the third switch, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit; or, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through the third switch; or, the first end of the first three-phase full-bridge inverter circuit is connected to the first end of the second three-phase full-bridge inverter circuit through one of the third switches, and the second end of the first three-phase full-bridge inverter circuit is connected to the second end of the second three-phase full-bridge inverter circuit through another of the third switches; The first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are used to operate in a preset working mode so that the first winding and the second winding of the motor operate in a preset winding connection structure.

2. A control method for an electric drive control system, characterized in that: Based on the electric drive control system as claimed in claim 1; The control method of the electric drive control system includes: According to the acquired operating status of the vehicle, the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system are controlled to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate according to a preset winding connection structure.

3. The control method of the electric drive control system according to claim 2, characterized in that: The step of controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes: When the vehicle speed is greater than 0 and less than a first preset speed, the first switch and the second switch are controlled to be disconnected, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to short-circuit one end of the U' phase winding, the V' phase winding and the W' phase winding of the second winding for connecting to the second three-phase full-bridge inverter circuit, so that the U phase winding is connected in series with the U' phase winding, the V phase winding is connected in series with the V' phase winding, and the W phase winding is connected in series with the W' phase winding, and the U phase winding and the U' phase winding, the V phase winding and the V' phase winding, and the W phase winding and the W' phase winding connected in series are star-connected.

4. The control method of the electric drive control system according to claim 2, characterized in that: The step of controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes: When the vehicle speed is greater than or equal to a first preset speed and less than a second preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to disconnect the electrical connection between the U' phase winding, the V' phase winding and the W' phase winding of the second winding, so that the U phase winding, the V phase winding and the W phase winding are star-connected.

5. The control method of the electric drive control system according to claim 2, characterized in that: The step of controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes: When the vehicle speed is greater than or equal to the second preset speed and less than the third preset speed, the first switch and the second switch are controlled to close, the first three-phase full-bridge inverter circuit is controlled to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly, so that the U-phase winding, the V-phase winding and the W-phase winding are star-connected, the U'-phase winding, the V'-phase winding and the W'-phase winding are star-connected, and the first winding and the second winding share a neutral point.

6. The control method of the electric drive control system according to claim 2, characterized in that: The step of controlling the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired running state of the vehicle to operate in a preset working mode so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate in a preset winding connection structure includes: When the vehicle speed is greater than or equal to the third preset speed and less than the fourth preset speed, the first switch and the second switch are controlled to be disconnected, and the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit are controlled accordingly, so that the U-phase winding is connected in series with the U'-phase winding, the V-phase winding is connected in series with the V'-phase winding, and the W-phase winding is connected in series with the W'-phase winding, and the series-connected U-phase winding and the U'-phase winding, the series-connected V-phase winding and the V'-phase winding, and the series-connected W-phase winding and the W'-phase winding are connected in a triangle.

7. An electric drive system, characterized in that: It comprises a motor, a reducer and the electric drive control system as claimed in claim 1, wherein the electric drive control system is used to control the motor so that the first winding and the second winding of the motor operate according to a preset winding connection structure; The motor is used to drive the reducer.

8. A vehicle, characterized in that: Comprising the electric drive control system as claimed in claim 1, or, the electric drive system as claimed in claim 7.

9. A control device for an electric drive control system, characterized in that: Based on the electric drive control system as claimed in claim 1; The control device of the electric drive control system comprises: A control unit is used to control the first switch, the second switch, the third switch, the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit of the electric drive control system according to the acquired operating status of the vehicle, and operate according to a preset working mode, so that the first winding and the second winding of the motor of the electric drive system of the vehicle operate according to a preset winding connection structure.

10. An electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the control method of the electric drive control system according to any one of claims 2 to 6 when executing the computer program.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is read and executed by a processor, the control method of the electric drive control system according to any one of claims 2 to 6 is implemented.

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