A lock-rotor protection method, device, vehicle and storage medium for a motor system

Abstract

The embodiment of the invention discloses a motor system stall protection method, device, vehicle and storage medium. Wherein, the method includes: calculating the corresponding current overload coefficient according to the torque overload coefficient and stall torque coefficient of the motor system and the conversion relationship between torque and current; if the accumulated heat of the motor system exceeds the heat calibration upper limit, then The operating torque of the motor system is adjusted by using a preset derating coefficient, and the accumulated heat of the motor system is caused by the current overload coefficient. The technical solution provided by the embodiments of the present invention adjusts the running torque of the motor when the motor is locked from the perspective of the heat generated by the motor system, avoids the failure of the motor system due to the motor lock, and improves the safety and reliability of the motor system.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of vehicle data processing, and in particular, to a motor system stall protection method, device, vehicle and storage medium. Background technique [0002] At present, with the shortage of energy and the deterioration of the environment, people pay more and more attention to electric vehicles, especially pure electric vehicles. As the only power source of pure electric vehicles, the motor system is more reliable and safe. important. The motor system contains a motor control unit, such as figure 1 As shown, it generates six pulse width modulation (Pulse Width Modulation, PWM) control signals to control the corresponding drive control unit and insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) module to drive the motor system to work. At this time, during the operation of the vehicle, when encountering obstacles or climbing a slope, the motor system will be bloc...

AI Technical Summary

Problems solved by technology

At this time, during the operation of the vehicle, when encountering obstacles or climbing a slope, the motor system will be blocked. At this time, the six IGBTs will not commutate any more. At the same time, two IGBTs will always be turned on. Do not switch to other IGBTs. If the stall time is too long, the IGBTs will overheat and burn out. At this time, the cost of integrated power modules is high, which greatly increases the maintenance cost of the motor system.

[0003] In the prior art, the stall condition of the motor system is usually judged from different dimensions of signals such as motor speed and torque. Judgment; If there are too many judgment dimensions for the stall condition, the amount of data that needs to be calibrated will be too large, which will increase the difficulty of the development of the motor system to a certain extent.

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