异步启动永磁同步电动机永磁体尺寸的估算

永磁体的形状与所选择的磁极结构有关,对于内置式结构,永磁体形状为矩形。异步启动永磁同步电动机的磁路结构通常选用内置串联式结构,两个磁极的永磁体串联。此时,磁路的磁动势为它们的和,而提供磁通的面积为一块永磁体的面积。等于永磁体轴向长度与永磁体宽度的乘积。永磁体的体积则取决于磁场强度H磁密B的乘积。其数值等于永磁体面积与其磁化方向长度的乘积。

Estimation Method of Permanent Magnets Size of Asynchronous Starting Permanent Magnet Synchronous Motor

The shape of permanent magnets is related to the selected structure of magnetic pole.For the built-in structure,the shape of permanent magnets is rectangular.The magnetic circuit of asynchronous starting permanent magnet synchronous motor usually adopts the built-in serial structure,i.e.the permanent magnets of two magnetic poles are connected in series.In this case,the magnetomotive force of magnetic circuit is the sum of them,and the area providing flux is that of this piece of permanent magnets,which value is equal to the product of the axial length of permanent magnets and the width of permanent magnets.The volume of the permanent magnets depends on the product of the magnetic field strength H and magnetic density B,which value is equal to the product of the area of permanent magnets and the length of permanent magnets in direction of magnetization.