Influence of Small Teeth on Vibration for Dual-Redundancy Permanent Magnet Synchronous Motor

Yiguang Chen, Yukai Yang and Yonghuan Shen
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Yiguang Chen: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Yukai Yang: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Yonghuan Shen: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China

Energies, 2018, vol. 11, issue 9, 1-17

Abstract: The dual-redundancy permanent magnet synchronous motor (DRPMSM) has high reliability in its applications. Compared with the traditional permanent magnet synchronous motor (PMSM), small teeth were added to the stator in DRPMSM and its vibration has new characteristics. This paper derived the analytic expression of the radial electromagnetic force for PMSM in the air gap based on the Maxwell stress equation and summarized its sources. The simplified stator teeth model of the traditional PMSM and DRPMSM were established in 12-slot/10-pole (12s10p), and the analytical expression and Fourier expansion of radial electromagnetic force on the teeth were given. The electromagnetic and structural finite element models of the motor were established, and analyses of modal and harmonic response were carried out. The simulation results show that the stator vibration amplitude of DRPMSM is smaller than that of traditional PMSM at no-load and is also bigger under rated load. Furthermore, in order to guarantee the low amplitude of stator vibration under rated load for DRPMSM, the width of the small teeth should be smaller.

Keywords: dual-redundancy permanent magnet synchronous motor; vibration; small teeth; Fourier expansion; harmonic response (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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