摘要
齿槽转矩通常被定义为磁共能相对于位置角的负导数。传统解析计算时,将定转子铁心材料磁导率假设为无穷大,忽略掉了定转子部分的铁心磁场能量的变化,只计算了气隙磁场能量的变化。通过有限元方法计算铁心部分磁场能量随着位置角的变化,并与气隙磁场能量变化做比较,直观的展现定转子铁心能量变化对于齿槽转矩的影响。最后再计算当磁路设计过饱和或磁密较低时,定转子铁心磁场能量的变化,并与气隙处磁场能量变化比较。
The cogging torque was usually defined as negative derivative of magnetic coenergy relative to po sition angle. When traditional analytical calculation, permeability of stator and rotor core was supposed to be infinite and then the energy change of core was ignored. Only the change of air gap was considered. By the finite element method, the core energy＇s change relative to position angle was calculated and compared with the air gap energy＇s change. Stator core energy＇s influence on cogging torque was directly demonstrated. Fi nally, when magnetic circuit was designed supersaturated or low flux density, the change of the core energy was calculated and compared with the air gap energy＇s change.
出处
《微电机》
北大核心
2012年第10期11-14,共4页
Micromotors
关键词
有限元法
定转子铁心磁场能量
齿槽转矩
finite element method
magnetic field co-energy of stator and rotor core
cogging torque
