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Electric drive system control method and device, vehicle and storage medium

A technology of electric drive system and control method, which is applied in the direction of motor generator control, AC motor control, electromechanical transmission control, etc., and can solve the problems affecting the NVH characteristics of pure electric vehicles and affecting the driver's driving experience, etc.

Active Publication Date: 2021-01-05
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the efficiency of the electric drive system, from the perspective of improving the efficiency of the motor controller, in the prior art, the Discontinuous Pulse Width Modulation (DPWM) method is mainly used to control the electric drive system, but when the inverter works During the process, when the insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT for short) switching frequency is fixed frequency and lower than 6K, it will affect the NVH characteristics of the pure electric vehicle, thereby affecting the driving experience of the driver

Method used

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  • Electric drive system control method and device, vehicle and storage medium
  • Electric drive system control method and device, vehicle and storage medium
  • Electric drive system control method and device, vehicle and storage medium

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Embodiment 1

[0025] Figure 1A It is a flowchart of an electric drive system control method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of controlling the electric drive system of an electric vehicle, especially for a pure electric vehicle. The electric drive system control method provided in this embodiment can be executed by the electric drive system control device provided in the embodiment of the present invention, and the device can be realized by means of software and / or hardware, and integrated in the vehicle executing the method.

[0026] see Figure 1A , the method of this embodiment includes but not limited to the following steps:

[0027] S110, according to the current load of the motor in the electric drive system, determine the target DPWM mode in the preset modulation mode table.

[0028] Wherein, the preset modulation mode table includes the corresponding relationship between the load and the preset number of DPWM modes, ...

Embodiment 2

[0055] Figure 2A It is a flow chart of an electric drive system control method provided by Embodiment 2 of the present invention. The embodiments of the present invention are optimized on the basis of the foregoing embodiments. Optionally, this embodiment explains in detail the process of determining the DPWM waveform.

[0056] see Figure 2A , the method of this embodiment includes but not limited to the following steps:

[0057] S210. Determine the target DPWM mode in the preset modulation mode table according to the current load of the motor in the electric drive system.

[0058] S220. Multiply the zero vector action time in the target DPWM mode by the random number corresponding to the zero vector generated according to the preset mathematical equation in the random zero vector modulation mode to obtain the adjusted target DPWM mode.

[0059] Wherein, the preset mathematical equation can be designed by the technician according to the characteristics of the random numb...

Embodiment 3

[0071] image 3A schematic structural diagram of a control device for an electric drive system provided in Embodiment 3 of the present invention, as shown in image 3 As shown, the device may include:

[0072] The target mode determination module 310 is configured to determine the target discontinuous pulse width modulation DPWM mode in the preset modulation mode table according to the current load of the motor in the electric drive system, wherein the preset modulation mode table includes load and preset The corresponding relationship of the number of DPWM modes;

[0073] The electric drive system control module 320 is configured to determine a DPWM waveform through a random zero-vector modulation method based on the target DPWM method, and control the electric drive system through the DPWM waveform.

[0074] In the technical solution provided by this embodiment, first, according to the current load of the motor in the electric drive system, the target DPWM mode is determin...

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Abstract

The embodiment of the invention discloses an electric drive system control method and device, a vehicle and a storage medium. The method comprises the steps of: according to the current load of a motor in the electric drive system, determining a target discontinuous pulse width modulation DPWM mode in a preset modulation mode table, wherein the preset modulation mode table comprises the corresponding relation between the load and a preset number of DPWM modes; and based on the target DPWM mode, determining a DPWM waveform through a random zero vector modulation mode, and controlling the electric drive system through the DPWM waveform. According to the technical scheme provided by the embodiment of the invention, the efficiency of the electric driving system can be improved, and the noise,vibration and acoustic vibration roughness of the whole vehicle can be reduced.

Description

technical field [0001] Embodiments of the present invention relate to pulse width modulation technology, and in particular to a control method, device, vehicle and storage medium for an electric drive system. Background technique [0002] With the shortage of energy and the deterioration of the environment, people pay more and more attention to electric vehicles. As the power source of electric vehicles, the reliability and stability of electric drive systems determine the safety and comfort of electric vehicles. Noise, vibration and harshness (NVH) of a vehicle are important criteria for evaluating the quality of an electric vehicle. [0003] In order to improve the efficiency of the electric drive system, from the perspective of improving the efficiency of the motor controller, in the prior art, the Discontinuous Pulse Width Modulation (DPWM) method is mainly used to control the electric drive system, but when the inverter works During the process, when the insulated gate...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/05H02P27/08B60L15/20
CPCH02P21/00H02P21/05H02P27/085B60L15/20Y02T10/64Y02T10/72
Inventor 潘忠亮李帅李岩李伟亮
Owner CHINA FIRST AUTOMOBILE
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