Cogging Torque Estimation of Permanent Magnet Motors Resulting from Magnetic Anisotropy of Non-oriented Electrical Steel Sheets

Daikoku, Akihiro; Yamaguchi, S.; Toide, Yukari; Fujiwara, Koji; Takahashi, Norio

doi:10.1541/ieejias.126.1712

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…The causes of circulating current in PM motors are inter-turn faults in stator windings and rotor eccentricity. Almost all reports on PM motors have focused on magnetic and mechanical faults [10] [11]. The mechanical loss and conduction loss of circulating currents have been reported to increase when PM motors are under static eccentricity [12].…”

Section: Introductionmentioning

confidence: 99%

Circulating current in parallel connected stator windings due to rotor eccentricity in permanent magnet motors

Maruyama

Takahashi

Nakahara

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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Rotor eccentricity in permanent magnet (PM) motors produces a voltage imbalance between parallel circuits that then creates a circulating current. This circulating current causes conduction loss, which is one of the stray losses in motors. The conduction losses of circulating currents need to be reduced in order to make PM more highly efficient. This paper describes the effect of neutral point connections on circulating current caused by static rotor eccentricity in a PM motor, as the circulating current depends on the use of neutral point connections in stator windings. We developed a theoretical expression for a circulating current with a closed circuit and compared its validity with that of measured results. The results of how well the connections of neutral points reduced the circulating current loss are provided.

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Section: Introductionmentioning

confidence: 99%