An electric drive control system and control method, an electric drive system, a vehicle, and an apparatus.

Abstract

This invention provides an electric drive control system and method, an electric drive system, a vehicle, and an apparatus, relating to the field of vehicle technology. The electric drive control system includes an inverter, a first switch, a second switch, and a third switch. 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. Based on a motor with first and second windings, this invention, by controlling the operating modes of the first switch, second switch, third switch, and the first and second three-phase full-bridge inverter circuits, can realize different connection methods between different windings of the motor. This facilitates the electric drive control system to automatically adjust the connection method of the motor windings by controlling corresponding components under different vehicle operating conditions. Thus, without relying on complex mechanical structures, a high-efficiency, low-cost vehicle electric drive control system is achieved to meet the power output requirements of the vehicle under different operating conditions.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to an electric drive control system and control method, an electric drive system, a vehicle, an apparatus, an electronic device, and a storage medium. Background Technology

[0002] Electric drive control systems are one of the important areas of technological development for new energy vehicles, and also an important component of new energy vehicles.

[0003] To meet the high torque demands of vehicles during low-speed hill climbing and the power requirements during high-speed driving, existing electric drive control systems typically employ a mechanical shifting scheme involving an electric motor and a gearbox. This scheme adapts to different operating conditions by shifting gears. However, due to the complexity of the gearbox structure, the mechanical shifting scheme has significant drawbacks, such as: complex structure, low system efficiency, large space occupation, and high maintenance difficulty. 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 addressed by this invention is: how to achieve a high-efficiency, low-cost vehicle electric drive control system without relying on complex mechanical structures, so as to meet the power output requirements of vehicles under different operating conditions.

[0005] To address the aforementioned problems, this invention provides an electric drive control system and control method, an electric drive system, a vehicle, an apparatus, an electronic device, and a storage medium.

[0006] In a first aspect, 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 for electrical connection with a 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. 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 corresponding bridge arms of the first three-phase full-bridge inverter circuit. At the midpoint of the bridge arm, the other end of the V-phase winding is connected to the other end of the U-phase winding through the first switch, and 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 midpoint of the corresponding bridge arm 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 terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit through the third switch, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit; or, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit through the third switch; or, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit through one of the third switches, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal 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 according to a preset working mode so that the first winding and the second winding of the motor operate according to a preset winding connection structure.

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

[0010] Based on the acquired vehicle operating status, the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and 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 second winding of the motor of the vehicle's electric drive system operate according to the preset winding connection structure.

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

[0012] When the vehicle speed is greater than 0 and less than the first preset speed, the first switch and the second switch are opened, 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, V' phase winding and W' phase winding of the second winding for connection 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. 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 star configuration.

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

[0014] 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, V' phase winding and W' phase winding of the second winding, so that the U phase winding, the V phase winding and the W phase winding are connected in a star configuration.

[0015] Optionally, the step of controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired vehicle operating status, so that the first winding and second winding of the motor of the vehicle's electric drive system operate according to 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, the step of controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired vehicle operating status, so that the first winding and second winding of the motor of the vehicle's electric drive system operate according to 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 open, 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. 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 connected in a delta configuration.

[0019] Thirdly, the present invention provides an electric drive system, including 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] Fourthly, the present invention provides a vehicle including an electric drive control system as described in the first aspect, or an electric drive system as described in the third aspect.

[0021] Fifthly, the present invention provides a control device for an electric drive control system, based on the electric drive control system described in the first aspect; the control device for the electric drive control system includes:

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

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

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

[0025] The processor is configured 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 that, when read and executed by a processor, implements the control method of the electric drive control system as described in the second aspect.

[0027] Compared with existing technologies, this invention has the following advantages: The electric drive control system of this invention is based on a motor with a first winding and a second winding. By controlling the operating modes of the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit, different connection methods between different windings of the motor can be realized. This allows the electric drive control system to automatically adjust the connection method of the motor windings by controlling corresponding components under different vehicle operating conditions (or running states), thereby optimizing the vehicle's power output, meeting the diverse power output needs of the vehicle, improving the flexibility and efficiency of the electric drive control system, and enhancing 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. Furthermore, the electric drive control system has the characteristics of simple overall structure, low cost, and ease of implementation, reducing the complexity and cost associated with relying on traditional mechanical shifting systems, effectively improving the cost-effectiveness of the electric drive control system. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an electric drive system in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of an electric drive system in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of an electric drive system in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of a structure for connecting the first winding and the second winding in an embodiment of the present invention;

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

[0033] Figure 6 This is a schematic diagram of the memory and processor of an electronic device in an embodiment of the present invention. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

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

[0036] Combination Figures 1-3 As shown, this embodiment of the invention provides an electric drive control system, including an inverter, a first switch, a second switch, and a third switch. The inverter is used for electrical connection with 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. 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 midpoint of the corresponding bridge arm of the second three-phase full-bridge inverter circuit is connected to the midpoint of the corresponding bridge arm. 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 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 midpoint of the corresponding bridge arm 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] Specifically, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit via a third switch, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit; or, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit via a third switch; or, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit via one third switch, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit via 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 according to a preset working mode so that the first winding and the second winding of the motor operate according to the 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 control and drive the motor, and includes components such as an inverter and a motor controller. In the electric drive system, the power battery, inverter, and motor are electrically connected in sequence. The inverter is used to realize bidirectional energy conversion between the power battery and the motor. For example, when the power battery supplies power to the motor through the inverter, the inverter converts the DC power output from the power battery into AC power required by the motor; when the motor reverse-charges the power battery through the inverter, the inverter converts the AC power output from the motor into DC power required by the power battery. The inverter includes a first three-phase full-bridge inverter circuit and a second three-phase full-bridge inverter circuit. These circuits function as inverter circuits when the power battery supplies power to the motor through the inverter, and as rectifier circuits when the motor reverse-charges the power battery through the inverter, thus achieving efficient bidirectional energy conversion within 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, while 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 motor's two windings (the first winding and the second winding). 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 midpoint of the corresponding bridge arm of the first three-phase full-bridge inverter circuit (e.g., ...). Figure 1 As shown, the midpoint of this 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. Specifically, one end of the U-phase winding is connected between power modules (or switching elements, such as IGBTs or MOSFETs) S1 and S4 of the first three-phase full-bridge inverter circuit; one end of the V-phase winding is connected between power modules S2 and S5; and one end of the W-phase winding is connected between power modules S3 and S6. The other end of the V-phase winding is connected to the other end of the U-phase winding via the first switch K1 and to the other end of the W-phase winding via 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 corresponding bridge arm of the second three-phase full-bridge inverter circuit (e.g., ...). Figure 1 As shown, the midpoint of this 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 power modules S7 and S10 of the second three-phase full-bridge inverter circuit, one end of the V' phase winding is connected between power modules S8 and S11, and one end of the W' phase winding is connected between 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] Furthermore, both the first and second three-phase full-bridge inverter circuits have a first terminal for connecting to the positive terminal of the power source (such as a power battery) and a second terminal for connecting to the negative terminal of the power source. Figure 1 As shown, the common connection point of power modules S1, S2, and S3 in the first three-phase full-bridge inverter circuit serves as the first terminal of the first three-phase full-bridge inverter circuit, and the common connection point of power modules S4, S5, and S6 in the first three-phase full-bridge inverter circuit serves as the second terminal of the first three-phase full-bridge inverter circuit; the common connection point of power modules S7, S8, and S9 in the second three-phase full-bridge inverter circuit serves as the first terminal of the second three-phase full-bridge inverter circuit, and the common connection point of power modules S10, S11, and S12 in the second three-phase full-bridge inverter circuit serves as the second terminal of the second three-phase full-bridge inverter circuit. In an electric drive control system, as... Figure 2 As shown, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit via the third switch K3, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit; or, as... Figure 1 As shown, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit through the third switch K3; or, as shown... Figure 3 As shown, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit through a third switch K3, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit through another third switch K3.

[0042] Based on the aforementioned 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 operating modes of the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit. For example, by controlling the on / off state of the first switch, second switch, and third switch, as well as the on / off state of the corresponding switching elements in the first three-phase full-bridge inverter circuit and second three-phase full-bridge inverter circuit, different connection methods between different windings of the motor (such as series and parallel connection of the first winding and the second winding, and star connection and delta connection of the motor windings) can be realized to cope with different operating conditions of the vehicle and meet the power output requirements of the vehicle under different operating conditions.

[0043] In this way, based on a motor with a first winding and a second winding, different connection methods between different windings of the motor can be realized by controlling the first, second, and third switches of the electric drive control system, as well as the operating modes of the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit. This allows the electric drive control system to automatically adjust the connection method of the motor windings by controlling corresponding components under different vehicle operating conditions (or running states), thereby optimizing the vehicle's power output, meeting the diverse power output needs of the vehicle, improving the flexibility and efficiency of the electric drive control system, and enhancing 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. Furthermore, the electric drive control system features a simple overall structure, low cost, and ease of implementation, reducing the complexity and cost associated with relying on traditional mechanical shifting systems, effectively improving the cost-effectiveness of the electric drive control system.

[0044] Optionally, combined Figures 1-3 As shown, the electric drive system, where the electric drive control system is located, also includes a power battery. The positive terminal of the power battery is connected to the first terminal of the first three-phase full-bridge inverter circuit, and the negative terminal of the power battery is connected to the second terminal 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 via an inverter (or to store electrical energy used for reverse charging of the motor). When the power battery supplies power to the motor via the inverter, the DC power output from the power battery is sent to the inverter, which converts the DC power into the three-phase AC power required by the motor to power the motor. Wherein, combined with Figures 1-3 As shown, the positive terminal of the power battery is connected to the first terminal of the first three-phase full-bridge inverter circuit, and the negative terminal of the power battery is connected to the second terminal of the first three-phase full-bridge inverter circuit.

[0046] It is worth noting that, for ease of understanding, the embodiment of this invention uses the connection of the positive terminal of the power battery to the first terminal of the first three-phase full-bridge inverter circuit and the connection of the negative terminal of the power battery to the second terminal of the first three-phase full-bridge inverter circuit as an example to illustrate the control method of the electric drive control system (described below). This is not a limitation on the connection relationship between the inverter and the power battery. For example, in some other embodiments, the positive terminal of the power battery can be connected to the first terminal of the second three-phase full-bridge inverter circuit and the negative terminal of the power battery can be connected to the second terminal of the second three-phase full-bridge inverter circuit. In this case, 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 terminal of the power battery is connected to the first terminal of the first three-phase full-bridge inverter circuit and the negative terminal of the power battery is connected to the second terminal of the first three-phase full-bridge inverter circuit".

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

[0048] In this embodiment, the inverter also includes a bus capacitor connected in parallel across the two ends of the power battery. The two ends of the bus capacitor are connected to the positive and negative terminals of the power battery, respectively. It can store and filter electrical energy, so that the bus capacitor can effectively smooth the DC voltage, reduce voltage fluctuations and ripple, thereby stabilizing the voltage at the input of the inverter and ensuring that the inverter can stably and smoothly convert DC power into AC power.

[0049] In this way, the power battery and bus capacitor can provide a more stable voltage input to the motor, improving the stability of the electric drive control system and the electric drive system, as well as the energy 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, as the core control unit of the electric drive control system, receives data (such as speed and torque requirements) from other vehicle systems, control units, or sensors, and adjusts the operating mode (or operating state) of the inverter, motor, etc., according to the current operating conditions and requirements. This allows for precise control of the motor's operating mode. Specifically, the motor controller communicates with the controlled end of at least one of the first, second, and third switches via corresponding communication interfaces to control the corresponding switches. For example, the motor controller dynamically adjusts the operating modes of these switches (i.e., adjusts the on / off states of these switches) in real time according to the vehicle's different operating conditions (such as acceleration, deceleration, low speed, high speed, etc.), changing the connection method of the motor windings to optimize the motor's operating mode. This enhances the automation and intelligence level of the electric drive control system.

[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 Figures 1-3 As shown, another embodiment of the present invention provides a control method for an electric drive control system, based on the above-described electric drive control system; the control method for the electric drive control system includes:

[0054] Based on the acquired vehicle operating status, the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and 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 second winding of the vehicle's electric drive system motor operate according to the preset winding connection structure.

[0055] Specifically, the system acquires the vehicle's current operating status. Based on this status, it controls the first, second, and third switches of the electric drive control system, as well as the first and second three-phase full-bridge inverter circuits, to operate in a preset mode (denoted as the preset operating mode). This ensures the motor operates with a winding connection suitable for the current vehicle operating status, and each inverter circuit operates in a mode appropriate for the current vehicle operating status, thereby optimizing the vehicle's power output and meeting its diverse power output needs. For example, by controlling the operating modes of the first, second, and third switches, as well as the corresponding switching elements in the first and second three-phase full-bridge inverter circuits, different preset winding connection structures for the motor can be achieved to address different vehicle operating conditions and meet the vehicle's power output requirements under varying conditions. For example, the preset winding connection structure includes: the U-phase winding, V-phase winding and W-phase winding of the first winding are connected in a star configuration, and the U'-phase winding, V'-phase winding and W'-phase winding of the second winding are connected in a star configuration; and the U-phase winding, V-phase winding and W-phase winding are connected in a star configuration; and the U-phase winding and U'-phase winding, the V-phase winding and V'-phase winding, and the W-phase winding and W'-phase winding connected in a series are connected in a star configuration; and the U-phase winding and U'-phase winding, the V-phase winding and V'-phase winding, and the W-phase winding and W'-phase winding connected in a series are connected in a delta configuration.

[0056] Thus, based on a simple electric drive control system, not only is high efficiency and low cost achieved in the vehicle's electric drive control system, enabling the entire electric drive control system and the electric drive system it resides in to operate efficiently under different operating conditions, and achieving optimal power output matching with lower control costs and complexity, thus improving the overall performance of the electric drive control system and the electric drive system it resides in, but it also allows the electric drive control system and the electric drive system to flexibly adjust the motor's power output under different operating conditions to meet corresponding power demands, and effectively reduces the control difficulty and cost of the electric drive control system, motor, and the electric drive system it resides in. Moreover, by pre-setting corresponding preset operating modes, the system can automatically match the operating mode suitable for the current operating condition based on the acquired vehicle's current operating status. On the one hand, this achieves precise control of the motor winding structure while improving the motor's control efficiency; on the other hand, it allows the motor windings to operate with a preset winding connection structure adapted to the current vehicle operating state, optimizing the motor's operating efficiency and performance.

[0057] Optionally, the vehicle's operating status includes operating parameters such as vehicle speed.

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

[0059] When the vehicle speed is greater than 0 and less than the first preset speed, the first and second switches are opened to control the first three-phase full-bridge inverter circuit to operate normally. 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, V' phase winding, and W' phase winding of the second winding that is connected to the second three-phase full-bridge inverter circuit. This makes the U phase winding connected in series with the U' phase winding, the V phase winding connected in series with the V' phase winding, and the W phase winding connected in series with the W' phase winding. The series-connected U phase winding with the U' phase winding, the series-connected V phase winding with the V' phase winding, and the series-connected W phase winding with the W' phase winding are connected in a star configuration.

[0060] Specifically, when the vehicle speed is low, i.e., the speed is greater than 0 but less than the first preset speed, the first and second switches are disconnected, realizing the series connection of the first and second windings, i.e., the U-phase winding and U'-phase winding are connected in series, the V-phase winding and V'-phase winding are connected in series, and the W-phase winding and W'-phase winding are connected in series; and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to short-circuit the U'-phase winding, V'-phase winding, and W'-phase winding for connection to one end of the second three-phase full-bridge inverter circuit, realizing the star connection of 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; the first three-phase full-bridge inverter circuit is controlled to operate normally, so as to stably supply power to the star-connected motor windings through the first three-phase full-bridge inverter circuit. This increases the effective number of windings in the motor, enabling it to output higher constant torque at low speeds, thus enhancing the motor's power output at low speeds and meeting the vehicle's demand for high torque during start-up and low-speed driving.

[0061] For example, for such Figure 1 The electric drive control system shown disconnects K1, K2, and K3 when the vehicle starts and travels at low speed. This controls the first three-phase full-bridge inverter circuit to operate normally and simultaneously turns on the power modules (or switching elements; such as IGBTs or MOSFETs) S10, S11, and S12 of the lower three bridges of the second three-phase full-bridge inverter circuit (i.e., the lower three bridges are short-circuited). At this time, each phase winding of the motor is composed of the corresponding phase windings of the first and second windings connected in series, achieving a short circuit at points H, I, and J, forming the neutral point of the motor windings. The three-phase windings of the motor form a star connection with two windings connected in series. For example, Figure 2The electric drive control system shown disconnects K1, K2, and K3 when the vehicle starts and travels at low speed. This controls the first three-phase full-bridge inverter circuit to operate normally and simultaneously activates the power modules S7, S8, and S9 of the upper three bridges of the second three-phase full-bridge inverter circuit (i.e., the upper three bridges are short-circuited). At this time, each phase winding of the motor is composed of the corresponding phase windings of the first and second windings connected in series, achieving a short circuit at points H, I, and J, forming the neutral point of the motor windings. The three-phase windings of the motor form a star connection with two windings connected in series. For example, Figure 3 The electric drive control system shown disconnects K1 and K2 and at least one of the two K3s when the vehicle starts and travels at low speed. This controls the first three-phase full-bridge inverter circuit to operate normally and controls the upper or 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 and second windings connected in series, realizing the short circuit of the three points H, I, and J, forming the neutral point of the motor windings. The three-phase windings of the motor form a star connection with two windings connected in series.

[0062] Optionally, based on the acquired vehicle operating status, controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset operating mode, so that the first winding and second winding of the vehicle's electric drive system motor operate according to 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 and second switches are closed to control the first three-phase full-bridge inverter circuit 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, 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 connected in a star configuration.

[0064] Specifically, when the vehicle speed is at a low to medium speed, that is, 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 closed to control the first three-phase full-bridge inverter circuit 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, while the second winding is not connected to the circuit. At this time, the U-phase winding, the V-phase winding and the W-phase winding of the first winding are connected in a star configuration.

[0065] In this way, when the vehicle is traveling at low to medium speeds, the required motor power is lower, and only the first winding is used, which reduces inductance and copper losses, ensuring that the motor operates in a high-efficiency range. By disconnecting the second winding, 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 of the first winding ensures the uniform distribution of the three-phase current, reducing instability issues in the electric drive control system and motor caused by current imbalance, and ensuring smooth operation of the vehicle at low to medium speeds. Furthermore, by reducing unnecessary winding connections, the complexity and losses of the electric drive control system and motor control are reduced, thereby improving the stability and reliability of the electric drive control system and motor, while extending the service life of the motor.

[0066] For example, for such Figure 1 The electric drive control system shown closes control circuits K1 and K2 and opens K3 when the vehicle is traveling at low to medium speeds. The second three-phase full-bridge inverter circuit is not working, while the first three-phase full-bridge inverter circuit is working normally. At this time, only the first winding of each phase of the motor is connected to the circuit; the second winding is not connected. Points E, F, and G are short-circuited, forming the neutral point of the motor windings. Therefore, the motor winding used at this time is the first winding connected in a star configuration. For example... Figure 2 The electric drive control system shown closes control circuits K1 and K2 and opens K3 when the vehicle is traveling at low to medium speeds. The second three-phase full-bridge inverter circuit is not working, while the first three-phase full-bridge inverter circuit is working normally. At this time, only the first winding of each phase of the motor is connected to the circuit; the second winding is not connected. Points E, F, and G are short-circuited, forming the neutral point of the motor windings. Therefore, the motor winding used at this time is the first winding connected in a star configuration. For example... Figure 3 The electric drive control system shown closes control K1 and K2 when the vehicle is traveling at low to medium speeds, and opens at least one of the two K3s. The second three-phase full-bridge inverter circuit does not operate, while the first three-phase full-bridge inverter circuit operates normally. At this time, only the first winding of each phase of the motor is connected to the circuit, the second winding is not connected, and points E, F, and G are short-circuited, forming the neutral point of the motor winding. That is, the motor winding used at this time is the first winding connected in a star configuration. In some embodiments, for example... Figure 3 The electric drive control system shown, when the vehicle is traveling at low to medium speeds, controls K1 and K2 are closed, and both K3s can be closed. The second three-phase full-bridge inverter circuit is not working (e.g., all power modules of the second three-phase full-bridge inverter circuit are disconnected), which can disconnect the electrical connection between the U' phase winding, V' phase winding, and W' phase winding of the second winding. The first three-phase full-bridge inverter circuit is working normally. At this time, 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. Points E, F, and G are shorted to form the neutral point of the motor winding. That is, the motor winding used at this time is the first winding with a star connection.

[0067] Optionally, based on the acquired vehicle operating status, controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset operating mode, so that the first winding and second winding of the vehicle's electric drive system motor operate according to 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 and second switches are closed to control the first three-phase full-bridge inverter circuit to operate normally, and the third switch and the second three-phase full-bridge inverter circuit are controlled accordingly to make the U-phase winding, V-phase winding and W-phase winding star connected, and the U'-phase winding, V'-phase winding and W'-phase winding star connected, and the first winding and the second winding share a neutral point.

[0069] Specifically, when the vehicle speed is at a medium-to-high speed (greater than or equal to the second preset speed but less than the third preset speed), the first and second switches are closed to control the first three-phase full-bridge inverter circuit to operate normally. The third switch and the second three-phase full-bridge inverter circuit are also controlled accordingly to achieve a star connection between the first winding and the second winding, with both windings sharing a neutral point. This allows the first winding and the first three-phase full-bridge inverter circuit to form one motor system, and the second winding and the second three-phase full-bridge inverter circuit to form another motor system. These two motor systems are connected in parallel by sharing a neutral point, which improves the power output of the motor at medium-to-high speeds, effectively distributes the load, reduces the current pressure when using only a single motor system, and thus improves the energy transmission efficiency of the overall electric drive control system. Furthermore, the star connection of both the first and second windings ensures current balance in each phase, achieving uniform current distribution, minimizing current harmonics, and achieving efficient energy conversion, avoiding localized energy loss due to uneven current.

[0070] This improves the stability of the electric drive control system and motor operation, and reduces the adverse effects caused by voltage fluctuations. In addition, the parallel design also increases the redundancy of the system to a certain extent, so that if 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 motor.

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

[0072] Optionally, based on the acquired vehicle operating status, controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset operating mode, so that the first winding and second winding of the vehicle's electric drive system motor operate according to 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 and second switches are opened, 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. The U-phase winding connected in series with the U' phase winding, the V-phase winding connected in series with the V' phase winding, and the W-phase winding connected in series with the W' phase winding are connected in a delta configuration.

[0074] Specifically, when the vehicle speed is at a high speed, i.e., greater than or equal to the third preset speed but less than the fourth preset speed, the first and second switches are opened, 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 achieve a delta connection of the series-connected U-phase windings and U'-phase windings, the series-connected V-phase windings and V'-phase windings, and the series-connected W-phase windings and W'-phase windings. In this way, by connecting the U-phase windings and U'-phase windings, the V-phase windings and V'-phase windings, and the W-phase windings and W'-phase windings in series, the overall voltage withstand capability of the motor windings is increased, while the current is reduced. Furthermore, the series-connected windings effectively improve voltage utilization under high-speed conditions, meeting the high voltage and high power requirements of high-speed driving. Compared to a star connection, the delta connection increases the line voltage between the windings, enabling the motor to achieve greater output power under high-speed conditions. It also effectively balances the current of each phase, optimizing the motor's operating performance.

[0075] By connecting the motor windings in series and using a delta connection at high speeds, the power output of the motor can be effectively increased to meet the power requirements of high-speed driving. In addition, energy loss can be reduced, system efficiency can be improved, the service life of the motor can be extended, and the high-speed stability of the vehicle can be enhanced.

[0076] For example, for such Figure 1 The electric drive control system shown, when the vehicle is traveling at high speed, controls K1, K2, and K3 are all disconnected. By controlling the opening and closing of corresponding power modules in the first and second three-phase full-bridge inverter circuits, the series connection of the U-phase winding with the U' phase winding, the series connection of the V-phase winding with the V' phase winding, and the series connection of the W-phase winding with the W' phase winding is achieved. Furthermore, the series-connected U-phase winding with the U' phase winding, the series-connected V-phase winding with the V' phase winding, and the series-connected W-phase winding with the W' phase winding are connected in a delta configuration. For example, at a certain moment, S1, S5, and S6 of the first three-phase full-bridge inverter circuit and S8, S10, and S12 of the second three-phase full-bridge inverter circuit are closed, while the remaining power modules (or switching elements) are disconnected, i.e., S2, S3, S4, S7, S9, and S11 are disconnected. At this time, points A and I are short-circuited, points B and C are short-circuited, and points H and J are short-circuited, ultimately forming a delta connection as shown. Figure 4 The triangle connection method.

[0077] For example Figure 2The electric drive control system shown, when the vehicle is traveling at high speed, controls K1, K2, and K3 are all disconnected. By controlling the opening and closing of corresponding power modules in the first and second three-phase full-bridge inverter circuits, the series connection of the U-phase winding with the U' phase winding, the series connection of the V-phase winding with the V' phase winding, and the series connection of the W-phase winding with the W' phase winding is achieved. Furthermore, the series-connected U-phase winding with the U' phase winding, the series-connected V-phase winding with the V' phase winding, and the series-connected W-phase winding with the W' phase winding are connected in a delta configuration. For example, at a certain moment, S2, S3, and S4 of the first three-phase full-bridge inverter circuit and S7, S9, and S11 of the second three-phase full-bridge inverter circuit are closed, while the remaining power modules (or switching elements) are disconnected, i.e., S1, S5, S6, S8, S10, and S12 are disconnected. At this time, points A and I are short-circuited, points B and C are short-circuited, and points H and J are short-circuited, ultimately forming a delta connection as shown. Figure 4 The triangle connection method.

[0078] For example Figure 3 The electric drive control system shown disconnects K1 and K2 when the vehicle is traveling at high speed, and disconnects one of the two K3s. It also controls the closing or opening of the corresponding power modules during the operation of the first three-phase full-bridge inverter circuit and the second three-phase full-bridge inverter circuit to achieve series connection of the U-phase winding with the U' phase winding, the V-phase winding with the V' phase winding, and the W-phase winding with the W' phase winding. The series-connected U-phase winding with the U' phase winding, the series-connected V-phase winding with the V' phase winding, and the series-connected W-phase winding with the W' phase winding are connected in a delta configuration.

[0079] Another embodiment of the present invention provides an electric drive system, including a motor, a reducer, and the above-described 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 aforementioned electric drive control system. The electric drive control system controls the motor so that the first and second windings of the motor operate according to a preset winding connection structure, thereby driving the reducer connected to the motor and realizing power output. The electric drive system possesses the same advantages over the prior art as the aforementioned electric drive control system, which will not be elaborated further here.

[0081] Another embodiment of the present invention provides a vehicle including the electric drive control system described above, or an electric drive system as described above.

[0082] The vehicle in this embodiment includes the electric drive control system or electric drive system described above, which has the same advantages over the prior art as the electric drive control system or electric drive system described above, and will not be repeated here.

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

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

[0085] The control device of the electric drive control system in 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 compared with 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 the first preset speed, control the first switch and the second switch to open, 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 to connect 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 U phase winding is connected in a star configuration with the series V phase winding and the series W phase winding.

[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 the first preset speed and less than the 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 connected in a star configuration.

[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 the second preset speed and less than the 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 so that the U-phase winding, V-phase winding and W-phase winding are star connected, the U'-phase winding, V'-phase winding and W'-phase winding are 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 the third preset speed and less than the fourth preset speed, control the first switch and the second switch to open, 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 with the U' phase winding, the series-connected V-phase winding with the V' phase winding, and the series-connected W-phase winding with the W' phase winding are connected in a delta configuration.

[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 is used to store computer programs;

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

[0093] Alternatively, 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; the processor 602 is configured to perform the following operations when the computer program is executed:

[0094] Based on the acquired vehicle operating status, the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and 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 second winding of the vehicle's electric drive system motor operate according to the preset winding connection structure.

[0095] The vehicle in 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 compared to the prior art, and will not be repeated here.

[0096] Another embodiment of the present invention provides a computer-readable storage medium storing a computer program, which is read and executed by a processor to implement the control method of the electric drive control system described above.

[0097] Alternatively, a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the following operations:

[0098] Based on the acquired vehicle operating status, the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and 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 second winding of the vehicle's electric drive system motor operate according to the preset winding connection structure.

[0099] The technical solutions of the embodiments of the present invention, or the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of the embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[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 compared to the prior art, and will not be repeated here.

[0101] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. An electric drive control system, characterized in that, The system includes an inverter, a first switch, a second switch, and a third switch. The inverter is used for electrical connection 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. 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 midpoint of the corresponding bridge arm of the first three-phase full-bridge inverter circuit. The other end of the winding is connected to the other end of the U-phase winding via the first switch, and to the other end of the W-phase winding via 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 midpoint of the corresponding bridge arm 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 terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit through the third switch, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit; or, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal of the second three-phase full-bridge inverter circuit through the third switch; or, the first terminal of the first three-phase full-bridge inverter circuit is connected to the first terminal of the second three-phase full-bridge inverter circuit through one of the third switches, and the second terminal of the first three-phase full-bridge inverter circuit is connected to the second terminal 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 according to a preset working mode so that the first winding and the second winding of the motor operate according to 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 described in claim 1; The control method of the electric drive control system includes: Based on the acquired vehicle operating status, the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and 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 second winding of the motor of the vehicle's electric drive system operate according to the preset winding connection structure.

3. The control method of the electric drive control system as described in claim 2, characterized in that, The step of controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired vehicle operating status, so that the first winding and second winding of the motor of the vehicle's electric drive system operate according to a preset winding connection structure, includes: When the vehicle speed is greater than 0 and less than the first preset speed, the first switch and the second switch are opened, 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, V' phase winding and W' phase winding of the second winding for connection 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. 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 star configuration.

4. The control method of the electric drive control system as described in claim 2, characterized in that, The step of controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired vehicle operating status, so that the first winding and second winding of the motor of the vehicle's electric drive system operate according to a preset winding connection structure, includes: 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, V' phase winding and W' phase winding of the second winding, so that the U phase winding, the V phase winding and the W phase winding are connected in a star configuration.

5. The control method of the electric drive control system as described in claim 2, characterized in that, The step of controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired vehicle operating status, so that the first winding and second winding of the motor of the vehicle's electric drive system operate according to 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 as described in claim 2, characterized in that, The step of controlling the first switch, second switch, third switch, first three-phase full-bridge inverter circuit, and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired vehicle operating status, so that the first winding and second winding of the motor of the vehicle's electric drive system operate according to 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 open, 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. 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 connected in a delta configuration.

7. An electric drive system, characterized in that, Includes a motor, a reducer, and an electric drive control system as described 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, This includes the electric drive control system as described in claim 1, or the electric drive system as described in claim 7.

9. A control device for an electric drive control system, characterized in that, Based on the electric drive control system as described in claim 1; The control device of the electric drive control system includes: The control unit is used to control the first switch, second switch, third switch, first three-phase full-bridge inverter circuit and second three-phase full-bridge inverter circuit of the electric drive control system to operate according to a preset working mode based on the acquired operating status of the vehicle, so that the first winding and second winding of the motor of the electric drive system of the vehicle operate according to the 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 configured to implement the control method of the electric drive control system as described in any one of claims 2-6 when executing the computer program.

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

Images