强制换向 forced commutation
- 旋转速度低于强制换向频率。
The rotation speed falls below the forced commutation frequency. - 直流励磁时间和强制换向时间都由一个外部电容设定。
Each period of DC excitation and forced commutation drives is set with an external capacitor. - 直流励磁和强制 换向模式的占空比根据引脚 SC 的电压确定。
The duty cycles for DC excitation and forced commutation modes are determined according to the SC pin voltage.
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