DefinePK

Abstract

The majority of electrical energy consumed in most industrial facilities is used to run electric motors. Therefore it is a persuasive need for researchers to develop advanced electric motors with less cost and high efficiency. There has been a recent interest in flux switching motor (FSM) in which all flux sources are positioned in stator that make the rotor simple, robust and brushless. Development of research has been with toothed rotor structures which exploits changes of paths for the stator teeth but this structure produces less torque and power. Hence, the use of a segmental rotor structure has been developed, which gives significant gains. The primary function of the segments is to provide a defined magnetic path for conveying the flux to adjacent armature coil in stator as rotor rotates. This design gives shorter end-winding than with toothed rotor structure which requires fully-pitched coils. Hence, permanent magnet FSM (PMFSM) and field excitation FSM (FEFSM) with segmental rotor have been developed, but due to their infirmity of less torque generation inherit from less flux linkage, a novel structure of hybrid excitation FSM (HEFSM) is proposed. The proposed design of HEFSM has simple structure with only three Field excitation coils (FECs) and three permanent magnets (PMs) is analysed using commercial 2D FEA package, JMAG-designer ver. 13.0, released by JSOL Corporation. This paper presents the coil test analysis of HEFSM to confirm the working principle besides this cogging torque, back emf and torque vs current densities have been presented.