基于转矩分配的开关磁阻电机转矩脉动抑制的研究

转矩脉动是开关磁阻电机亟待解决的问题和研究难点之一,其限制了速度控制性能和位置测量精度的进一步提升。基于转矩分配的开关磁阻电机转矩脉动抑制的理论研究已取得较大进步,但由于电机磁路的非线性,使得在实际应用中转矩很难准确反馈。本文根据电机的实际规格和尺寸,采用Maxwell3D计算出在不同转子位置和相电流下的转矩,建立了转矩-电流逆模型;通过合理地设置开通角、换相重叠角和关断角,简化了程序设计,抑制了反向制动转矩;进而根据转矩分配函数,采用电流闭环对转矩进行间接控制。仿真和实验结果证明了该方法可以有效地减小转矩脉动。

Torque ripple minimization for switched reluctance motor based on TSF

Instantaneous torque ripple is one of the important difficulties of the switched reluctance motor to be solved, which limits the performance of speed control and position measurement precision for the further enhance-ment. The theoretical study of SRM torque ripple suppression based on torque distribution has made great progress, but the torque is difficult to be accurately fed back in practical application because of the nonlinear magnetic cir-cuit. According to the actual specification and size of the motor, this paper calculates the torque under the different rotor position and phase current by using the software of Maxwell3D, then torque-current inverse model is set up. It simplifies the programming and inhibits the braking torque by reasonably setting the turn-on angle, commutation o-verlap angle and turn-off angle. The torque is controlled by adjusting the phase current based on the torque sharing function in the simulation and experiment, and the results show that the method can effectively reduce the torque ripple.