不会有老式驱动器那样的缓冲区欠载运行烦恼。
指定较慢的速度对于纠正错误和缓冲区欠载运行很有用。
Specifying slower speeds is useful for correcting errors and buffer underruns.
其结果表明，此功率因数自动控制系统在空载、欠载运行时节能效果显著。
The simulation results demonstrate that it can save up energy about 30-50% when there is no load or a little load.
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