It neither has heating problem of the electronics soft starter, nor generates high frequency harmonic like SCR.
它没有电子软起动器的发热问题，也不会像晶闸管一样引起高次谐波。
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。
To avoid this problem, the system is designed with two connected circuits: the starter circuit and the control circuit.
为了避免这个问题，启动系统设计有两套电路：启动机电路和控制电路。
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