SRM can be designd in multi-phase in theory.The more phase number, the more electron switch componeat needed, the more complex circuit, the more the cost, so three or four phase is common.

• 摘要开关磁阻电动机原理上可以制成多相结构，相数越多，则需要的电子开关元件越多，线路越复杂，成本更高，因此一般多制成三相或四相结构。