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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (8): 1311-1319    DOI: 10.1631/jzus.2007.A1311
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Analysis of a new 5-phase bearingless induction motor
HUANG Jin, KANG Min, YANG Jia-qiang
School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  This paper addresses the bearingless motor with a single set of multiphase windings. The interaction between M and M±1 pole-pair magnetic fields produces radial force. Based on this principle, a bearingless machine is obtained. Conventional bearingless machine has dual windings, levitation windings and torque windings, which produce the two magnetic fields. In the proposed bearingless motor, the two needed magnetic fields are produced by feeding two groups of currents to a single set of multiphase windings. Taking a 5-phase induction motor as example, the inductance matrices, considering air gap eccentricity, are calculated with the modified winding function method. The radial force analytical model is deduced by virtual displacement, and its results are validated by FEA. The mathematical model of the new bearingless machine is set up, and the simulation results verified the feasibility of this novel bearingless motor.

Key words： Air-gap-flux-oriented control      Bearingless motor      Multiphase      Radial force      Single set of windings      Modified winding function method     
Received: 02 March 2007     
CLC:  TM301  
  TM303  
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HUANG Jin
KANG Min
YANG Jia-qiang
Cite this article:

HUANG Jin, KANG Min, YANG Jia-qiang. Analysis of a new 5-phase bearingless induction motor. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(8): 1311-1319.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A1311     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I8/1311

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