Using the technique of frequency conversion in three-phase motor, it is convenient to simulate vehicles engine in differ rotate speed.
利用变频技术对三相异步电动机进行变频调速，方便地模拟了车辆发动机不同转速。
One is the composing, function and principle of rotate speed and phase servo system of magnetic drum;
另一方面是主导轴的转速和相位伺服部分的组成、作用和工作原理。
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