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。
The topic of Energy saving on motor system has always being researched by scholars, and the variable frequency variable speed technology has been paid the focus attention among the researches.
电机节能问题一直是广大学者研究的热点，在电机节能技术中最受瞩目的是变频调速技术。
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。
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