The invention discloses a vehicle torque estimation method and device, and relates to the technical field of motor control, and the vehicle torque estimation method comprises the steps: calibrating a rotor flux linkage, d-axis inductance and q-axis inductance in motor parameters at a set low motor rotating speed segment, so as to estimate the vehicle torque at the low motor rotating speed segment; in a set high motor rotating speed section, q-axis inductance in motor parameters is calibrated, a torque calculation factor related to rotor flux linkage is calculated according to the q-axis inductance and q-axis voltage fed back in real time, and vehicle torque under the high motor rotating speed section is estimated according to the torque calculation factor; and in a set intermediate rotating speed transition section, performing weighted average on the vehicle torque under the low motor rotating speed section and the vehicle torque under the high motor rotating speed section to estimate the vehicle torque under the intermediate rotating speed transition section. According to the method, the output torque of the new energy automobile motor can be accurately estimated.
一种车辆扭矩估算方法及装置,涉及电机控制技术领域,其中,所述车辆扭矩估算方法包括:在设定的低电机转速段,标定电机参数中的转子磁链、d轴电感和q轴电感以估算低电机转速段下的车辆扭矩;在设定的高电机转速段,标定电机参数中的q轴电感,根据q轴电感与实时反馈的q轴电压,计算与转子磁链相关的扭矩计算因子,并根据所述扭矩计算因子估算高电机转速段下的车辆扭矩;在设定的中间转速过渡段,对所述低电机转速段下的车辆扭矩和高电机转速段下的车辆扭矩进行加权平均,以估算中间转速过渡段下的车辆扭矩。本申请可较为精确地对新能源汽车电机的输出扭矩进行估算。
Vehicle torque estimation method and device
一种车辆扭矩估算方法及装置
2024-09-06
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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