Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43497
Title: Electromagnetic performance analysis of novel flux-regulatable permanent magnet machines for wide constant-power speed range operation
Authors: Wang, Y
Niu, S 
Fu, W 
Keywords: Field weakening
Finite element method (FEM)
Memory machine
Wide speed range
Wind power
Issue Date: 2015
Publisher: Molecular Diversity Preservation International (MDPI)
Source: Energies, 2015, v. 8, no. 12, p. 13971-13984 How to cite?
Journal: Energies 
Abstract: Two novel structures of permanent magnet (PM) machine, namely a hybrid excitation flux modulation machine (HEFMM) and a variable flux memory machine (VFMM), which have excellent field-weakening capability, are presented in this paper. The HEFMM incorporates the advantages of parallel hybrid excitation structure and flux modulation structure, so as to increase the torque density as well as increase the constant-power speed range. Inspired by the HEFMM, aiming to further improve the efficiency of machine, theVFMMwith aluminum-nickel-cobalt (AlNiCo) PMs in the inner stator which can be magnetized by the current pulse of the direct current (DC) windings is developed. With double-stator structure, flux modulation effect in both machines can be employed to realize the hybrid excitation and regulate the air-gap flux density readily. The operation principle is illustrated and the static and steady performances of the machines are analyzed and compared with time stepping finite element analysis, which validates the effectiveness of the proposed designs.
URI: http://hdl.handle.net/10397/43497
ISSN: 1996-1073
DOI: 10.3390/en81212407
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