variable- frequency variable-speed 变频变速
variable frequency variable speed system 变频调速系统
variable frequency variable-speed system 变频调速系统
variable-frequency variable-speed operation 变频调速运行
explosion-proof variable frequency variable speed 防爆变频调速
variable-frequency and variable-speed motor 变频调速电机
variable-frequency and variable-speed 变频调速电机
variable-frequency and variable-voltage speed regulation 变频变压调速
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The variable frequency variable speed system of three-phase asynchronous motor based on DSP has been researched in this paper.
本文研究一种基于数字信号处理器（DSP）的三相异步电动机变频调速系统。
Combined with the variable frequency transformation of the induced fan in my company, the variable frequency speed regulation technology is ripe, and the electricity-saving effect is significant.
结合我公司引风机的变频改造，认为变频调速技术已经成熟，节电效果显著，在其他转机上可以应用。
MW variable speed constant frequency wind turbine from shenyang university of technology is a variable pitch wind turbine, it can change pitch to adjust power above rated wind speed.
由沈阳工业大学研制的MW级变速恒频风电机组属于变桨距型机组，它在额定风速以上进行变桨距调功控制。
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