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Energies 2017, 10(4), 551; doi:10.3390/en10040551

Optimal Design of the Rotor Structure of a HSPMSM Based on Analytic Calculation of Eddy Current Losses

State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
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Academic Editor: K.T. Chau
Received: 12 January 2017 / Revised: 2 April 2017 / Accepted: 11 April 2017 / Published: 17 April 2017
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Abstract

The rotor eddy current losses of a high-speed permanent magnet synchronous motor reduce the efficiency of the motor and increase the temperature rise of the rotor. In severe cases, the permanent magnet of the rotor can be demagnetized, affecting the safe operation of the motor. In this paper, an analytical model of rotor eddy current losses calculation based on Maxwell equations is introduced. The eddy current losses of rotor structures, e.g., protection sleeve, shield layer and permanent magnets, are analyzed. The calculation results of rotor eddy current losses are compared with two-dimensional (2D) finite element analysis. The comparison verifies the accuracy and versatility of analytical calculation. Finally, the influences of the variables on eddy current losses in the derived model are analyzed. Based on the principle of minimizing eddy current losses, an optimized structure with copper layers covering both inner and outer surfaces of the protective sleeve is proposed. Furthermore, the optimized distribution parameter of copper film thickness is obtained. View Full-Text
Keywords: high-speed permanent magnet synchronous motor; eddy current losses; analytic calculation; optimal design high-speed permanent magnet synchronous motor; eddy current losses; analytic calculation; optimal design
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Yu, Y.; Liang, D.; Liu, X. Optimal Design of the Rotor Structure of a HSPMSM Based on Analytic Calculation of Eddy Current Losses. Energies 2017, 10, 551.

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