The invention discloses a motor output torque control method and system. The method comprises the steps of inputting the obtained electromagnetic torque at the previous moment into a pre-established adjustable model; obtaining an estimated rotor electrical angular velocity value at the current moment; calculating an adjustable coefficient on the basis of a difference value between a pre-acquired rotor electrical angular velocity value at the current moment and the estimated rotor electrical angular velocity value; obtaining an adjustable coefficient, performing rotational inertia calculation on the adjustable coefficient to obtain an identification rotational inertia, performing active damping operation on the identification rotational inertia, the rotor electrical angular velocity value at the current moment and a pre-obtained band-pass filter transfer function value to obtain an electromagnetic torque at the current moment, and executing control operation of the motor output torque.By means of the scheme, the electromagnetic torque at the current moment, namely the electromagnetic torque for restraining torque vibration, is obtained, the control operation of the motor output torque is executed through the electromagnetic torque for restraining torque vibration, the motor rotating speed vibration of the vehicle in the running process is reduced, and therefore the driving smoothness is improved.
本发明公开了一种电机输出转矩控制方法及系统,将获取到的上一时刻的电磁转矩输入至预先建立的可调模型,得到当前时刻的估计转子电角速度值,基于预先获取到的当前时刻的转子电角速度值和估计转子电角速度值的差值进行可调系数计算,得到可调系数,将可调系数进行转动惯量计算,得到辨识转动惯量,将辨识转动惯量、当前时刻的转子电角速度值和预先获取到的带通滤波器传递函数值进行主动阻尼运算,得到当前时刻的电磁转矩,并执行电机输出转矩的控制操作。通过上述方案,得到当前时刻的电磁转矩,即为抑制扭矩震动的电磁转矩,通过抑制扭矩震动的电磁转矩执行电机输出转矩的控制操作,降低车辆在行驶的过程中的电机转速震动,从而提升驾驶平顺性。
Motor output torque control method and system
一种电机输出转矩控制方法及系统
2020-09-18
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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