西门子6ES7392-1BM01-0AA0

6ES7392-1BM01-0AA0无刷直流电机运行原理图，绕组为三相星形接法，120度均布，采用三相半桥驱动方式，转子为一对极。在图示位置，磁钢的磁极中心线与a相绕组对齐，此时的控制电路根据转子位置检测信号，使s1开关管触发导通，b相绕组通电，在b相绕组磁场的作用下，转子将顺时针旋转120独门，到达虚线转子所示的位置，磁钢的磁极中心线与b相绕组对齐，此时，控制电路根据转子位置检测信号，使s1开关管关断，使s3开关管导通，a相绕组通电，转子在a相绕组磁场的作用下，转子将顺时针旋转120度，按上述通电顺序循环导通，转子就顺时针旋转下去。无刷直流电机采集转子位置信号，前者，电机结构简单，但电机起动困难;后者，电机结构稍复杂，但起动平稳、可靠，目前大部分的无刷直流电机均采用后者。位置的种类很多，空调用的无刷直流电机一般采用霍尔元件作为位置传感器。

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