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Design and Characteristic Analysis of a Novel Bearingless SRM considering Decoupling between Torque and Suspension Force

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  • Yan Yang
  • Zeyuan Liu
  • Zhiquan Deng
  • Xin Cao

Abstract

A Bearingless Switched Reluctance Motor (BSRM) has a complicated character of nonlinear coupling; therefore, it is a hard work to operate BSRM stably. In this paper, a new type of BSRMs with novel rotor structure is proposed by analyzing relationships between motor structure and theoretical formulae of levitation force and torque. The stator structure of this new motor is same as that of traditional BSRM and each stator pole can coil one winding or two windings, while the pole arc of rotor is wider. In order to analyze the characteristics of the proposed BSRM, finite-element (FE) models are used and a 12/4 one-set-winding BSRM and a 12/8 two-sets-windings BSRM are taken as examples. The analysis results indicate that the new scheme is effective for a stable levitation. It can realize decoupling control of torque and radial force, thus simplifying its control strategy and improving the use ratio of winding currents. A control system is designed for the 12/8 BSRM based on deducing its mathematical model. Compared with traditional BSRM, the proposed scheme is easier to be implemented.

Suggested Citation

  • Yan Yang & Zeyuan Liu & Zhiquan Deng & Xin Cao, 2014. "Design and Characteristic Analysis of a Novel Bearingless SRM considering Decoupling between Torque and Suspension Force," Mathematical Problems in Engineering, Hindawi, vol. 2014, pages 1-12, November.
    • Handle: RePEc:hin:jnlmpe:101626
    DOI: 10.1155/2014/101626
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