The demagnetization of switched reluctance motor (SRM) is usually a nonnegligible problem as the speed increases due to large back electromotive force (EMF). A slow demagnetization causes long tail current and negative torque, which reduces the efficiency and the output capability of SRM. In the conventional SRM design method, the inductance slope is normally designed to be high. However, it causes the problems of slow demagnetization in the negative torque region and low utilization efficiency of the torque-generative region. This article proposed a totally contrary way of SRM design, a small value of the inductance slope is chosen. Therefore, the effect of the back EMF can be diminished and the demagnetization is improved. The utilization of the torque-generative region is also improved due to the delayed turn-off angle. Simulation results are provided to verify the advantages of the proposed idea compared with the conventional one.

中文翻译：

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一种加速开关磁阻电机退磁的概念

开关磁阻电机 (SRM) 的退磁通常是一个不可忽视的问题，因为由于较大的反电动势 (EMF) 导致速度增加。缓慢退磁会导致长尾电流和负转矩，从而降低 SRM 的效率和输出能力。在传统的 SRM 设计方法中，电感斜率通常设计得很高。但会造成负转矩区退磁慢、转矩产生区利用效率低的问题。本文提出了一种完全相反的 SRM 设计方式，选择较小的电感斜率值。因此，可以减少反电动势的影响并改善退磁。由于延迟关闭角，扭矩产生区域的利用率也得到了提高。