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This paper presents a comparative study of three types of doubly salient machines (DSMs), i.e. wound field variable flux machines (VFMs), hybrid-excited stator slot permanent magnet machines (HSSPMs), and stator slot permanent magnet machines (SSPMs). Two dimensional finite element (FE) modelling is carried out to investigate the electromagnetic performance of the VFM and the SSPM based on a global...
This paper provides a comprehensive analysis of performance difference in the flux reversal permanent magnet (FRPM) machines with various magnet arrangements. The influence of different PM arrangements on working airgap flux density harmonics is firstly revealed. The torque variation against rotor pole number for four PM arrangements is then analyzed. Results show that each arrangement exhibits superiority...
Vernier Permanent-magnet machine (VPMM) has been recognized in recent years as a substitute for permanent magnet synchronous machines (PMSM) in direct-drive applications such as wind turbine generators, motorcycles and electric vehicle/hybrid electric vehicle (EV/HEV) [1].
This paper proposes an axial flux magnetically geared (AFMG) permanent magnet (PM) machine for power split application in hybrid electric vehicles (HEVs). The proposed AFMG machine has the merits of simple structure and improved torque density by combining a magnetic gear (MG) with a PM machine. The machine can realise power split without changing the function of MG and PM machines. The input mechanical...
In this paper, a novel axial flux magnetically geared machine (AFMG) is presented. The proposed AFMG machine consists of stator segments equipped with concentrated windings and two permanent magnet (PM) rotors with different pole-pair numbers. The proposed AFMG offers the merit of simple mechanical structure and is suitable for applications with limited axial space. To maximize the torque, both 2D...
Silicon steels are widely applied in the magnetic cores design, such as power transformer, electrical machine, and magnet. Magnetic properties of the silicon steel are key factors in design and performance optimization of the electrical apparatus. In the past several decades, one and two dimensional (2-D) magnetic properties testing methods have been developed for single sheet silicon steel specimen...
Flux switching permanent magnet (FSPM) machines are innovative brushless machines that have magnets built into the stator instead of the rotor. Numerous studies were performed comparing the operational characteristics of FSPM machines with that of traditional PM machines as well as comparing the various design configurations of FSPM machines within themselves [1], [2]. The available literature is...
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