宽调速可控磁通永磁同步电机磁路设计和有限元分析  

MAGNETIC CIRCUIT DESIGN AND FINITE ELEMENT ANALYSIS OF WIDE-SPEED CONTROLLABLE-FLUX PMSM

作　　者：陈益广[1] 王颖[1] 沈勇环[1] 唐任远[2] 

机构地区：[1]天津大学电气与自动化工程学院,天津市南开区300072 [2]沈阳工业大学电气工程学院,辽宁省沈阳市110123

出　　处：《中国电机工程学报》2005年第20期157-161,共5页Proceedings of the CSEE

摘　　要：提出了一种内置混合式转子可控磁通永磁同步电机,是真正意义上的宽调速电机。其径向永磁体采用剩磁密度和矫顽力都很高的钕铁硼,而切向永磁体采用剩磁密度高但矫顽力却很低的铝镍钴。通过定子直轴电流矢量脉冲控制铝镍钴的磁化方向和强弱,使钕铁硼产生的磁通部分穿过气隙,部分被铝镍钴在转子内部旁路,使永磁气隙主磁通受控。给出了永磁体尺寸和磁路结构尺寸的选取原则,特别是将交轴磁路磁阻设计的较大,交轴电感较小时,弱磁效果会更好,还能减少电枢反应对永磁气隙主磁通的影响。对两种极端磁化状况下模型电机内部磁场的分布进行了有限元分析,说明所提出的设想是可行的。A interior composite-rotor controllable-flux permanent magnet synchronous machine （PMSM） for true wide-speed operation is proposed. The radial-set magnets are NdFeB that has high remanent flux density Br and high coercive force Hc. The tangential-set magnets are AlNiCo that has high Br and low Ho The magnetizing intensity and direction of AlNiCo controlled by a stator d-axis current vector pulse. The flux created by NdFeB is repelled by AlNiCo to stator and the air-gap PM-flux is intensified, Or the flux created by NdFeB is partially bypassed by AlNiCo in the rotor and the air-gap PM-flux is weakened. The dimension of permanent magnets and magnetic circuit structure are demonstrated. When the q-axis larger magnetic resistance and smaller inductance are designed, the result of flux-weakening will be better, and the influence of armature reaction on air-gap PM-flux is weakened. The internal magnetic field distribution in two ultra magnetized situations was analyzed by finite element analysis, and the proposed assumption is proved viable.

关 键 词：可控磁通永磁同步电机 记忆电机 内置混合式转子 有限元分析 磁路设计 

分 类 号：TM351[电气工程—电机]