This paper presents a simple turn-on and turn-off angles adjustment method to increase the efficiency of small-size switched reluctance motor (SRM) in wide speed and torque range. The simplicity of the control algorithms allows building a variable speed drive without a high-performance microcontroller and FPGA or ASIC. The firing angles calculation uses a second-order polynomial and look-up table. An increase in efficiency is demonstrated on the finite element analysis (FEA) model of SRM which was verified against measurement on an experimental test bench. Measured efficiency maps have a flat top for the investigated motor. Therefore, the angle jittering due to limited position sensor precision and 50 µs processor cycle time have a small impact on motor efficiency. The evaluation of the angle adjustment method and comparison with measurements identifies which part of the FEA model is crucial for the one-to-one implementation of the angle adjustment formulas obtained from simulation to the motor control algorithm.

本文提出了一种简单的开启和关闭角度调整方法，以提高小尺寸开关磁阻电机 (SRM) 在宽速度和扭矩范围内的效率。控制算法的简单性允许在没有高性能微控制器和 FPGA 或 ASIC 的情况下构建变速驱动器。触发角计算使用二阶多项式和查找表。SRM 的有限元分析 (FEA) 模型证明了效率的提高，该模型已根据实验测试台上的测量结果进行验证。测量的效率图对于所研究的电机具有平坦的顶部。因此，由于位置传感器精度有限和 50 µs 处理器周期时间导致的角度抖动对电机效率的影响很小。