罗克韦尔模块1769-OF4CI

1769-OF4CI 1.在区间(a)，磁极传感器Ha和Hc检测到N极并输出信号。在这种情况下，如果晶体管 Tru+ 和 Trv= 导通，则电流从定子中的 U 相线圈流向 V 相线圈。此时，V相在转子磁铁中的北极被磁化(励磁)，吸引南极，排斥北极。U 相在南极磁化(励磁)并排斥转子磁体中的南极。这导致转子顺时针旋转。

2.在区间(b)中，超过60°，只有磁极传感器Ha检测到北极并输出信号。在这种情况下，如果晶体管Tru+和Trw-导通，则电流从定子中的U相线圈流向W相线圈。U 相保持励磁，吸引转子磁体中的北极，并排斥转子磁体中的南极。W 相被激发为北极并排斥转子磁体中的北极。这导致转子顺时针旋转。

3. 每旋转60°，磁极传感器Ha、Hb、Hc的ON/OFF组合发生变化。对于电机旋转一圈，有6种不同的磁极传感器输出组合，分别用(a)到(f)表示。通过为每个模式顺序切换一组确定的激发相，连续产生旋转磁场。

另外，通过改变磁极传感器Ha、Hb、Hc的各输出组合的电流流过线圈的方式，可以反转电动机的旋转方向。

例如，如果仅磁极传感器Ha检测到N极并在上述间隔(b)输出信号时晶体管Trv+和Tru-导通，则电流从V相线圈流向U相线圈定子。此时U相在转子磁铁中被励磁为北极，吸引南极，排斥北极。V 相被激发为南极并排斥转子磁体中的南极。这导致转子逆时针旋转。

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