Conversion of shaded-pole induction motor to switched reluctance motor and effects of pole shoe and notch on SRM noise

摘要

The switched reluctance motor (SRM) is well known for its higher acoustic noise, caused by stator vibrations. This paper describes a method for noise reduction in a new stator pole face SRM having pole shoe and notch. This motor has been made by conversion shaded-pole induction motor to SRM. Static characteristic of the motor is analyzed and calculated by using the method of the finite element (FE) analysis and compared with SRMs having conventional shape but without pole shoe and notch. The acoustic noise intensity and torque ripple for the base motor were calculated by taking the static profile of radial force and torque. The results showed that the amplitude of radial force and torque ripple in converted SRM were decreased in comparison with the base motor but there was no change in torque.