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
H-Y 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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External organisation

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.