The invention discloses a control system and method for preventing overspeed of a motor when a pure electric vehicle is in a neutral gear, the control system comprises the motor, a main speed reducer, a differential mechanism and two driving wheels, the motor, the main speed reducer and the differential mechanism are rigidly connected through a driving shaft, the differential mechanism is connected to the two driving wheels through a driving half shaft, and the whole vehicle is not provided with a gearbox. And the motor system is meshed with the main reduction gear and is in mechanical rigid connection with the main reduction gear. By means of the control strategy, the adverse effect caused by vehicle overspeed and motor rotating speed overspeed due to neutral gear sliding of a driver can be avoided, feedback power complementation through AC/PTC/ACM and other high-voltage power consumption parts when the battery feedback power is insufficient under the special condition is considered, and therefore feedback braking torque can be guaranteed more advantageously, and the service life of the vehicle is prolonged. Therefore, the deceleration is guaranteed, the whole vehicle can operate in a normal vehicle speed range, and the safety of the whole vehicle and the reliability of parts are guaranteed.
本发明公开了纯电动汽车空挡时防止电机超速的控制系统及方法,包括电机、主减速器、差速器和两个驱动轮,所述电机、主减速器和差速器之间通过驱动轴硬性连接,所述差速器通过驱动半轴连接到两个驱动轮上,所述整车上没有变速箱,没有所谓真正的空挡,所述电机系统与主减齿轮啮合,通过机械硬性连接。本发明通过以上控制策略,可以解决驾驶员空挡滑行导致车辆超速、电机转速超速造成的不良影响,还考虑了特殊情况下,电池回馈功率不足时,利用AC/PTC/ACM等高压耗电零部件进行回馈功率的补足,从而更加有利的保障回馈制动扭矩,从而保证减速度,使整车能够维持在正常车速范围内运转,保证了整车的安全性和零部件的可靠性。
Control system and method for preventing motor overspeed in neutral gear of pure electric vehicle
一种纯电动汽车空挡时防止电机超速的控制系统及方法
2024-11-08
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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