This paper introduces a frequency variable control system for elevator driven by linear induction motor, and this elevator has been tested.
设计了一套圆筒形直线感应电动机驱动的电梯全数字变频控制系统，对其进行了试验。
The main spindle is driven by a variable frequency controlled AC motor.
主轴是由变频控制交流电机驱动。
This paper describes a device of cable reel which is driven by computer controlled frequency-changing motor whose velocity can be regulated.
介绍了一种以微机控制变频调速电机驱动电缆卷筒的装置。
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