Design and analysis of a novel hybrid cooling method of high-speed high-power permanent magnet assisted synchronous reluctance starter/generator in aviation applications |
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Institution: | 1. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100083, China;2. Science and Technology on Aircraft Control Laboratory, Beihang University, Beijing 100083, China;3. Ningbo Innovation Research Institute, Ningbo 315800, China;4. School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China;5. Beijing Shuguang Aviation Electric Co. LTD, Beijing 101300, China;6. Aviation Industry Helicopter Design and Research Institute, Jingdezhen 333001, China |
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Abstract: | To improve the heat dissipation performance, this paper proposes a novel hybrid cooling method for high-speed high-power Permanent Magnet assisted Synchronous Reluctance Starter/Generator (PMaSynR S/G) in aerospace applications. The hybrid cooling structure with oil circulation in the housing, oil spray at winding ends and rotor end surface is firstly proposed for the PMaSynR S/G. Then the accurate loss calculation of the PMaSynR S/G is proposed, which includes air gap friction loss under oil spray cooling, copper loss, stator and rotor core loss, permanent magnet eddy current loss and bearing loss. The parameter sensitivity analysis of the hybrid cooling structure is proposed, while the equivalent thermal network model of the PMaSynR S/G is established considering the uneven spraying at the winding ends. Finally, the effectiveness of the proposed hybrid cooling method is demonstrated on a 40 kW/24000 r/min PMaSynR S/G experimental platform. |
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Keywords: | Air gap friction loss Oil spray cooling Permanent magnet assisted synchronous reluctance starter/generator Thermal analysis Thermal network model |
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