AB产品1784-SD2

1784-SD2

磁通总是倾向穿过磁阻路径。 如图1.1所示，S1 S2控制电流开启和关断，VD1 VD2 为电流的续流二极管。图示位置中AA'和aa'的位置磁阻，CC'的磁阻小，如果此时D相通电，转子将逆时针旋转；如果此时B相通电，转子将顺时针旋转；如果此时A相通电，转子保持维持不变。需要注意的是，开关磁阻电机 无法通过电流方向的改变实现电机转动方向的改变 ，而是通过改变通电时序的变化实现电机的正反转。

顺时针旋转通电顺序：B-A-D-C

逆时针旋转通电顺讯：D-A-B-C

由于电机在转动过程中磁阻的变化剧烈，因此磁阻电机的转矩****脉动将变得很高，为了保证电机能够平稳运行，控制磁阻电机需要知道转子的位置，负载的状态，速度的状态等信息。并且磁阻电机的模型没有永磁同步电机/异步电机有很好 线性度 ，需要大量的预测模型和算法进行控制精度的提升，这无疑是增加了磁阻电机控制的难度。

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