目前除采用一般的直流电外，根据实际的需要还可采用周期换向电流及脉冲电流。
At present in the general of dc outside, according to the actual need to still can use cycle reversing current and pulse current.
卫星姿控飞轮是由三相轮流换向无刷直流电动机驱动的，采用力矩控制(电流反馈)模式。
Satellite attitude control flywheel is driven by three-phase alternate commutating brushless DC motor, schema of which is torque control model (current feedback).
高速条件下，无刷直流电动机的电流换向产生严重滞后，导致转矩下降并伴随脉动。
Serious commutation lag occurs when a Brushless DC Motor (BLDCM) operates at high speeds, and this leads to torque decline with ripple.
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