Comparative Study of Dual PM Vernier Machines

In this paper, two types of dual permanent magnet (PM) machines, i.e., stator slot dual-PM (SSDPM) machine and split-tooth dual-PM (STDPM) machine, are investigated and compared. Both machines have consequent pole structure with Halbach array PMs. Their difference lies in the position of stator PM....

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Bibliographic Details
Published inWorld electric vehicle journal Vol. 12; no. 1; p. 12
Main Authors Qu, Huan, Zhu, Zi Qiang, Matsuura, Toru, Ivanovic, Dusan, Kato, Takashi, Sasaki, Kensuke, Greenough, Jim, Bateman, Bob, Stone, David A., Foster, Martin P., Riedemann, Javier
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.03.2021
Subjects
Arrays
Circuits
Coils (windings)
Comparative studies
dual permanent magnet (PM)
electric vehicle (EV)
flux modulation
Halbach PM array
Permanent magnets
Rotors
Stators
Torque
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Summary:In this paper, two types of dual permanent magnet (PM) machines, i.e., stator slot dual-PM (SSDPM) machine and split-tooth dual-PM (STDPM) machine, are investigated and compared. Both machines have consequent pole structure with Halbach array PMs. Their difference lies in the position of stator PM. The SSDPM machine has Halbach array PMs in the stator slots, while the STDPM machine has PMs between the split teeth. Torque characteristics, i.e., average torques and torque ripples, of different slot/pole number combinations of the two machines are compared. The 24 stator slots/20 rotor slots/4 armature pole pair (24S20R4Pa) SSDPM machine with distributed windings and the 24 stator slots/10 rotor slots/4 armature pole pair (12S20R4Pa) STDPM machine with concentrated windings are compared under both open-circuit and on-load conditions. The results show that the SSDPM machine is more competitive by delivering higher torque density and higher power density.
ISSN:2032-6653
2032-6653
DOI:10.3390/wevj12010012