上海交通大学学报

上海交通大学学报

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高功率密度表嵌式磁极偏移永磁电机转矩性能提升（网络首发）

  

  1. 上海交通大学电力传输与功率变换控制教育部重点实验室
  • 基金资助:
    国家自然科学基金（52007115）资助项目

Torque Improvement for High Power Density Machines with Shifted Surface-Inserted Permanent Magnets

  1. Key Laboratory of Control of Power Transmission and Conversion of the Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China

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摘要： 高功率密度是航空飞行器用电机关键性能需求，电机转子结构对功率密度指标具有显著影响。本文采用磁极偏移结构提高永磁同步电机功率密度和永磁体利用率。针对150 kW、12000 r/min额定工作点，基于遗传优化算法开展表贴式、表嵌式以及表嵌式磁极偏移结构永磁同步电机的优化设计和性能对比研究，并在表嵌式磁极偏移结构基础上对比不同材料填充、不同磁极偏移角的影响。结果表明，表嵌式磁极偏移结构电机相比于表贴式结构电机，可以将功率密度提高2.1%，永磁体用量减小17.6%，转矩脉动降低11.6%，具有良好的应用潜力。

关键词: 高功率密度电机, 永磁同步电机, 磁极偏移结构, NSGA-II优化算法

Abstract: High power density is critical to high-performance electrical machines in aviation, and the rotor structures of the machines play an essential role. This paper focuses on the permanent magnet (PM)-shifting rotor to enhance the power density and PM utilization ratio of the PM synchronous machines. Aimed at the rated operation point with the power of 150 kW and the speed of 12000 r/min, the global optimizations based on Non-dominated Sorting Genetic Algorithm-II (NSGA-II) optimization algorithm are applied to the surface-mounted, surface-inserted, and surface-inserted-shifted PM machines individually, and then the three optimal machines are comprehensively evaluated and compared. Furthermore, the comparative investigations on the surface-inserted-shifted PM machines with different structures and different PM shifting angles, are carried out. It is revealed that the surface-inserted-shifted PM machines can exhibit 2.1% higher power density, 17.6% lower PM usage, and 11.6% lower torque ripple than the conventional surface-mounted PM machines, indicating good potential for aircraft applications.

Key words: high power density machine, permanent magnet synchronous machine, permanent magnet-shifting, NSGA-II optimization algorithm

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