For this, people thought of the frequency conversion motor, of course it fixed speed than other adjustment methods to energy conservation.
为此，人们想到了变频电机，当然它比固定转速的其他调节方法要节能。
Vacuum suction assist paper feed, air volume frequency conversion adjustment to meet the needs of different cardboard.
吸附风机辅助送纸，风量大小变频调节，以配合不同纸板。
This article takes water -supply system of one school as an example, researches the application of PLC and frequency conversion speed adjustment technology in the electrical control system.
以某学校供水系统为例，研究了PLC及变频调速技术在电气控制中的应用。
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