高速爪极电机外永磁转子设计

Permanent Magnet Outer Rotor Design of High Speed Claw Pole Machine

为了解决内转子结构高速永磁电机转子保护套导致的等效气隙大和散热困难等问题,本文研究了一种外转子结构高速永磁爪极电机。计算了不同温度时转子铁心和永磁体应力分布情况,分析了外永磁转子不同模态下的临界转速与转子动力学特性,研究了轴承刚度对转子临界转速的影响,分析了转子结构尺寸与主要电磁性能参数的关系,提出了该类电机外永磁转子综合设计方法,并研制了一台1.5k W试验样机。通过样机空载和负载试验验证了外转子结构高速爪极电机的可行性和设计方法的正确性。

In order to solving the problems of large air-gap and heat dissipation caused by the rotor retaining sleeve of the high speed permanent magnet（PM） machine, the high speed claw pole machine with outer PM rotor is researched. The stress distribution of rotor yoke and PMs for different degrees is calculated; the critical speed and dynamic characteristics for several rotor modes is analyzed; the influence of the bearing stiffness on the critical speed is researched; the relationship between the main electromagnetic performance parameters and rotor sizes is analyzed, so the comprehensive design method of outer PM rotor is proposed, and a 1.5k W prototype is manufactured. The feasibility and correctness of design method of the high speed permanent magnet machine with outer rotor is verified by the no-load and load test of prototype.