6SN1118-0DH11-0AA0

6SN1118-0DH11-0AA0

6SN1118-0DH11-0AA0 这一过程也可以用功角来解释，空载时，步进电机功角很小，绕组电流矢量与反电势矢量的点积很小，绕组电流基本源自绕组电感的续流作用，消耗很小，微观电流变化率很小；带载时，步进电机功角扩大，绕组电流矢量与反电势矢量的点积增大，由于需对外做功，绕组电流消耗增大，来自电源的周期性电流注入和补充增多，微观电流变化率变大。

6SN1118-0DH11-0AA0 

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