小功率外转子异步起动永磁同步电机设计研究  

Study and Design of the Low Power Line-start Permanent Magnet Synchronous Motors

作　　者：蔡万里 杨凯[2] 杨德望 

机构地区：[1]武汉船用电力装置研究所,武汉430064 [2]华中科技大学,武汉430074

出　　处：《微电机》2010年第9期6-8,12,共4页Micromotors

摘　　要：由于小功率永磁同步电机(PMSM)定子电阻很大,导致永磁体制动转矩较大,因而难于起动。外转子结构相对于内转子结构定子槽相对更小,转子部分转动惯量更大,起动更加困难。该文提出并设计了一种特殊结构的外转子异步起动PMSM,电机为400 W,8极外转子结构。电机采用场路结合方法设计。首先使用Ansys有限元程序求出电机设计的关键参数:空载气隙反电势,漏磁系数,交直轴同步电抗等。然后用编制的磁路计算程序计算电机的起动性能曲线。通过先后设计的两台样机实验,证明场路结合设计方法更可行。同时,分析表明小功率PMSM的磁路饱和度对其起动性能影响很大,为了保证能良好起动,应适当降低其饱和度。It is difficult for low power line-start permanent magnet synchronous motor（namely PMSM）to reach synchronous speed because of big braking torque which is caused by big stator resistance.A novel external rotor structure line-start PMSM of 400 W and 8 poles was proposed.The motor was designed and investigated by the field-circuit combined method.Firstly,the air gap flux density,magnetic leakage coefficient,direct axis and quadrature axis synchronous reactances were calculated by Ansys finite element software.Then the starting characteristic curve was obtained by a compiled magnet circuit calculation program.Finally,the experiments of two protypes were carried out to prove the method above.The analysis shows that the saturation of the magnet circuit has a great influence on the starting characteristic of the low power line-start PMSM.

关 键 词：外转子 异步起动PMSM 场路结合方法 起动性能 

分 类 号：TM351[电气工程—电机] TM341