variable frequency speed regulation 变频调速
variable frequency speed control 变频调速
variable frequency speed control system 变频调速系统
variable frequency speed-regulating 变频调速 ; 变频器
variable speed constant frequency generator 定频变速发电机 ; 变速恒频发电
variable-frequency and variable-speed motor 变频调速电机
variable- frequency variable-speed 变频变速
So, NIRVANA can say is the only true sense have speed of variable frequency drive screw air compressor.
所以，NIRVANA可以说是目前惟一真正意义上拥有调速变频驱动的螺杆空压机。
This paper studied the three-phase PWM(pulse width modulation) rectifier in dual PWM variable frequency speed regulation system.
对双PWM变频调速系统中的三相PWM整流器及其控制方法进行了研究。
This paper mainly discusses the control and protection system for the 20kw VSCF (Variable Speed Constant Frequency) Wave Power Electric Station.
本文着重介绍了20千瓦变速恒频波力发电系统的控制功能和保护体系。
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