Electromagnetic and thermal analysis of open-circuit air cooled high-speed permanent magnet machines with gramme ring windings

Dong, J.; Huang, Yunkai; Jin, Long; Guo, Baocheng; Lin, Heyun; Dong, Jiyong; Cheng, Ming; Yang, Hui

Electromagnetic and thermal analysis of open-circuit air cooled high-speed permanent magnet machines with gramme ring windings

Journal article (2014)

Authors

J. Dong Southeast University

Yunkai Huang Southeast University

Long Jin Southeast University

Baocheng Guo Southeast University

Heyun Lin Southeast University

Jiyong Dong Nanjing CIGU Limited Corporation

Ming Cheng Southeast University

Hui Yang Southeast University

Affiliation

External organisation

Computational fluid dynamics (CFD) High-speed permanent magnet motor (HSPMM) Loss analysis Lumped-parameter thermal networks (LPTNs)

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Published Date

01-11-2014

Language

English

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Abstract

This paper investigates the electromagnetic and thermal performances of the open-circuit air cooled high-speed permanent magnet motor (HSPMM) with Gramme ring windings. Take a 36 kr/min, 75 kW HSPMM as an example, the electromagnetic losses, in particular the rotor eddy current loss and the stator iron loss of the motor are calculated. The influences of switching frequency and air gap length on these losses are studied. Then, a computational fluid dynamics (CFD) model is composed to calculate its coolant flow parameters and the temperature distribution. Based on the CFD results, a lumped-parameter thermal network (LPTN) is created and verified. Then, a 24 kr/min, 140 kW prototype with the same structure and cooling configuration is designed using the LPTN. Experiments show that the calculated results are with reasonable accuracy. Finally, a sensitivity analysis is applied to the 140 kW prototype based on the LPTN to disclose the influences of different parameters on the rotor permanent magnet temperature rise.