Motor zero torque control method and related equipment

By detecting the motor torque in new energy vehicles and controlling the disconnection of the IGBT power module, the problem of insufficient zero torque control accuracy of traditional motors is solved, and the accuracy of the sliding resistance test data and the shortening of the R&D cycle are achieved.

CN114123917BActive Publication Date: 2025-03-18DONGFENG MOTOR GRP
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Patent Information

Application Number
CN202111240851.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-10-25
Publication Date
2025-03-18
Estimated Expiration
2041-10-25

AI Technical Summary

Technical Problem

In the gliding resistance test of new energy vehicles, due to the insufficient zero torque control accuracy of traditional motors, the gliding resistance fluctuates greatly and the discrete gliding damping curve is difficult to pass the experiment.

Method used

By obtaining the vehicle state, when the vehicle is in the sliding state, the torque of the motor is detected. If the torque is not zero, the IGBT power module of the control motor controller is disconnected to ensure that the motor output torque is stable to 0.

Benefits of technology

It effectively avoids the impact of factors such as ambient temperature, calibration accuracy and coupling gearbox on the vehicle's zero-tower sliding torque, reduces torque fluctuation resistance, improves the data accuracy of the sliding resistance test, and shortens the R&D cycle.

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Abstract

This specification relates to the field of vehicle development and testing, and more specifically, the present invention relates to a motor zero torque control method and related equipment. The motor zero torque control method includes: obtaining the vehicle state; when the vehicle is in a gliding state, detecting the torque of the motor; when the torque of the motor is not zero, controlling the IGBT power module of the motor controller to disconnect, thereby limiting the output of three currents to the motor, so that the output torque of the motor is 0, avoiding the influence of factors such as ambient temperature, calibration accuracy and coupled reduction box on the vehicle's gliding zero torque, and in the vehicle gliding resistance test, it will not be disturbed by torque fluctuation resistance, making the test data more accurate. Compared with the existing bench calibration method, there is no need to calibrate the current value of the motor zero torque at each speed, which can save time, shorten the research and development cycle, and facilitate subsequent vehicle power and economy research.
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