An improved Two-phase Modular Switched Reluctance Motor with Segmented Stator

in this paper, an improved modular switched reluctance motor (SRM) is proposed with permanent magnets (PMs), located in stator yoke. This motor is a two-phase 8/10 SRM. Its stator consists of two E-Cores and two T-Cores, which are in staggered arrangement. The three poles of each E-Core are featured by one common pole in the middle and two excitation poles on the sides. Each T-Core is characterized by one common pole with two permanent magnets in two side stator yokes. All common poles have no windings. In order to analyze proposed motor, its feature is comprehensively introduced. For better illustrating the characteristic and improvements, it is compared with conventional SRM with the same sizes by means of finite element simulation. Some parameters such as average torque, output power and efficiency are compared. It is shown that proposed motor has better performances. Finally, experimental verification is performed to validate design and operation of proposed motor.

I. Introduction

With great development of high performance power electronics and low cost digital controllers, switched reluctance motor (SRM) has been potentially suitable for many industrial application^[1]–[2]. SRM is characterized by simple structure, no winding or permanent magnets (PMs) on the rotor. These inherent features make SRM have many advantages such as robustness, low manufacturing cost, less maintenance issues, and capable of high-speed operations^[3]–[4]. At the same time, various motor structures are available for SRM, which make it more attractive to industry and be used for specific application such as electric vehicles and aircraft starter-generator^[5]–[6]. However, they still have some drawbacks like low torque and power density.