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| Split Ratio Optimization for Permanent Magnet Synchronous Machines Considering Winding Temperature Limitation |
| Zhang Xintong, Zhang Chengming, Li Liyi, Cao Jiwei, Wang Kaisiyuan |
| Electrical Institute Harbin Institute of Technology Harbin 150001 China |
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Abstract The split ratio is a significant parameter which affects the torque and efficiency of permanent magnet synchronous machines (PMSM). This paper proposes a split ratio optimization model for PMSM considering winding temperature limitation. The typical thermal constraints of the split ratio optimization are the fixed maximum copper loss and current density allowed. However, as the heat conductivity of the machine changes with the split ratio due to the variable dimensions of the slots, teeth and yoke, the typical thermal constraints are difficult to limit the winding temperature at the same level. To solve this problem, the winding temperature limitation was taken as the thermal constraint directly in this paper based on the thermal resistance network (TRN). To improve thermal analytical accuracy, the thermal resistance classification according to the heat source type was proposed. The effectiveness of the proposed optimization model is verified by finite element analysis (FEA) and experiment of a 5 kW prototype machine
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Received: 08 January 2018
Published: 14 May 2019
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| Fund:This work is partially supported by National Natural Science Foundation of China (51677041). |
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2019, Vol. 34 
