Higher Performance Speed Control System with Flat Torque Control for Switched Reluctance Machines

开关磁阻电机最吸引人的优点之一是它们没有永磁体。然而，开关磁阻电机有一些缺点，特别是转矩脉动大，并且具有非线性特性。转矩脉动产生的噪声、不规则的旋转和非线性特性使开关磁阻电机的精确控制成为可能。这些缺点阻碍了开关磁阻电机的广泛使用。本研究试图解决这些缺点，以便将开关磁阻电机应用到更多的领域。仅靠转矩脉动抑制控制来减小转矩脉动是不够的。实现开关磁阻电机的低转矩脉动，既需要瞬时电流波形控制，又需要合适的平转矩控制驱动电路。在研究中，提出了一种新颖的并联电容驱动电路，从控制和电路两个方面实现了较低的转矩脉动。驱动电路采用平坦的转矩控制，实现了转矩脉动小于5%。实验结果表明，与传统的开关磁阻电机驱动控制相比，采用该电路和平力矩控制器的速度控制具有更好的控制性能。

One of the most attractive merits of switched reluctance machines (SRMs) is they have no permanent magnet. The SRMs, however, have some demerits, large torque ripples, and nonlinear characteristics, especially. The torque ripples results acoustic noises, irregular rotation, and nonlinear characteristics makes the precise control of SRMs. The demerits prevent for widespread use of SRMs.The study tried to solve the demerits in order to apply SRMs to many fields. It is not enough to reduce the torque ripple with only the torque ripple suppression control. The realization of lower torque ripple of SRMs needs both instantaneous current waveform control and suitable drive circuit for flat torque control. In the study, a novel drive circuit with parallel capacitors was proposed and the lower torque ripple was realized with both the control and the circuit. The flat torque control on the drive circuit realized torque ripple less than 5%. It is confirmed in experiment that the speed control with both the proposed circuit and the flat torque controller has much higher performance than conventional SRM drive control.