并从永磁起动机设计的角度出发，提出了亟待解决的技术问题。
From the point of starter designing, it gives out the technical problems necessary to be solved.
永磁起动机机壳长度比磁极长度大得多，且轭部磁路非常饱和。
In permanent magnet starter motor, the length of housing is greater than that of the magnetic pole, and the stator yoke is highly saturated.
永磁材料和磁极结构的选择直接关系到永磁起动机设计的成败，是永磁起动机设计者首先应当解决的问题，目前尚无完善的选择原则。
The selection of PM material and magnetic structure is important for design of PM starter motor. It is the most important problem for designer to solve, but there is no perfect standard to be adopted.
永磁材料和磁极结构的选择直接关系到永磁起动机设计的成败，是永磁起动机设计者首先应当解决的问题，目前尚无完善的选择原则。
The selection of PM material and magnetic structure is important for design of PM starter motor. It is the most important problem for designer to solve, but there is no perfect standard to be adopted.
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