The waveforms of the collector current and collector-emitter voltage are also determined under the optimum operation condition.

在最佳工作条件下，给出了集电极电流和集电极——发射极电压波形。

Features: Low collector-emitter saturation voltage, fast switching speed.

特点：饱和压降低，开关速度快。

In this design, the collector-to-emitter voltage is sensed to determine the directions of the output currents for the 4-step commutation strategy.

该文检测器件集射极电压确定输出电流方向，并据此实现四步换流。