Step motor control, by pulse by changing the order of electricity can change the motor rotation direction, change the pulse frequency can change the motor rotation speed.
步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。
Stepping motor control by pulse, by changing the order of power to change the direction of rotation motor, change the pulse frequency may change the motor rotation speed.
步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。
Because the AC asynchronous motor 'synchronous speed is determined by the frequency, we can control the AC asynchronous motor' speed by changing the supply power's frequency.
交流变频调速系统是利用异步交流电动机的同步转速随频率变化的特性，通过改变电机的供电频率而进行调速。
By changing the speed of grinding wheel, its swing frequency and the feed speed of shaft direction, different experiment results were got.
通过改变砂轮转速、砂轮摆动频率、轴向进给量，获得了一些具有对比性的试验结果。
Changing the speed of electric motor by using ac frequency conversion is to regulate output flow of hydraulic pump to control the velocity of the motion of hydraulic actuator.
通过交流变频调速改变电机的转速来调节液压泵的输出流量。控制液压执行元件的运动速度。
This paper introduces application and developing tendency of AC speed control technique by changing frequency in crane's electrical diving of port and Marine based on potential energy load.
文章主要介绍具有位能性负载特点的港口及船舶起重机械电气传动中交流变频调速技术的应用及发展趋势。
The control aim is accomplished by changing the speed of the motor according to the frequency and running steady.
实验结果实现了电机的变频调速，且速度稳定，达到了论文提出的控制目标。
This machine adopts micro-computer system to control the frequency-changing metre and with infinite speed adjustment.
本机采用微机程序控制变频器，无级调速。
The invention is a AC-AC frequency-changing stepless speed regulation device for AC motors.
本发明是一种交流电动机交交变频无级调速装置。
Rated frequency is 50Hz. The JP2 double-speed finishing motors are with speed-change switch for changing quick or slow speed easily.
额定频率为50Hz，JP2D双速磨光电机可带速度转换开关，方便快慢速度的转换。
Rated frequency is 50Hz. The JP2 double-speed finishing motors are with speed-change switch for changing quick or slow speed easily.
额定频率为50Hz，JP2D双速磨光电机可带速度转换开关，方便快慢速度的转换。
应用推荐