永磁直驱风力发电机不同极槽配比的磁场研究  

Study on Magnetic Field in Direct-driven Permanent Magnet Wind Turbine with Different Poles-slots Ratio

作　　者：杜炜[1] 杨俊华[1] 杨梦丽[2] 李坤涛[1] 方连航[1] 吴捷[3] 

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]河南省电力公司检修公司,河南郑州450052 [3]华南理工大学电力学院,广东广州510641

出　　处：《陕西电力》2013年第7期12-15,20,共5页Shanxi Electric Power

基　　金：国家自然科学基金项目(60904078);广东省教育厅专项重点实验室(IDSYS200701)

摘　　要：永磁同步发电机运行时,永磁体和电枢铁心相互作用会产生齿槽转矩,引起转矩波动和噪声。应用Ansys设计分析软件中的有限元模块和磁路等效模块,研究了分数槽绕组外转子永磁直驱风力发电机在不同极槽配比情况下的齿槽转矩、磁场分布、气隙磁密谐波含量和电机效率的变化规律;对比分析了整数槽电机在直槽和斜槽2种设计方案下的电压及畸变率。仿真结果表明,分数槽和斜槽结构均能有效削弱电机的齿槽转矩,消除高次谐波电压,且整数斜槽结构的电机削弱齿槽转矩的效果更好一些。Interaction between permanent magnetic and armature core could cause cogging torque, torque ripple, noise during permanent magnet synchronization generator（PMSG） operation. With the finite element module and equivalent magnetic circuit method in Ansys, the cogging torque, magnetic field distribution, harmonic of air-gap flux density and efficiency of fractional slot winding PMSGs with outer rotor are studied under different poles-slots ratio. The voltage and THD of the direct slot and skewed slot design schemes of integer slot generators are compared. The simulation results show that the cogging torque can be reduced efficiently and the harmonics voltage can be eliminated in generators by both fractional slot and skewed slot schemes. And the cogging torque can be more reduced in the integer generator with skewed slot.

关 键 词：极槽配比 永磁同步发电机 斜槽 齿槽转矩 消除谐波 ANSYS 

分 类 号：TM614[电气工程—电力系统及自动化]