This article introduces a concept to extend the base speed of a switched reluctance motor (SRM) from the perspective of the motor’s design. Conventionally, designs prioritize a high saliency of SRM in order to produce more torque with the same current. However, the speed range is limited in the conventional design. The back EMF is the key factor that restricts the speed of the SRM from further increasing due to its strong reaction to the phase terminal voltage applied, which is especially severe at high-speed operation. Therefore, in this article, the design of an SRM with a lower inductance slope is proposed. The reduction of the motor’s saliency in the proposed idea can effectively diminish the back EMF; thus an extended base speed and wider constant torque range can be achieved. Comparative simulation results from the conventionally designed motor and the motor designed by the proposed idea are given, which demonstrate that the base speed is enhanced and the current control can be maintained at a higher speed in the proposed idea.

中文翻译：

---

在开关磁阻电机中实现宽速运行的设计考虑

本文从电机设计的角度介绍了扩展开关磁阻电机 (SRM) 基本速度的概念。通常，设计优先考虑 SRM 的高显着性，以便在相同的电流下产生更大的扭矩。然而，速度范围在传统设计中受到限制。反电动势是限制 SRM 速度进一步提高的关键因素，因为它对施加的相端电压有强烈的反应，这在高速运行时尤其严重。因此，在本文中，建议设计具有较低电感斜率的 SRM。在提出的想法中降低电机的显着性可以有效地减少反电动势；因此可以实现扩展的基本速度和更宽的恒转矩范围。