Based on vector control theory, a fully digital variable speed system is designed.

基于矢量控制理论设计了一套全数字变频调速系统。

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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。

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Based on vector control theory, a full digital variable speed system is designed. The system structure and method for designing the software and hardware are introduced.

基于矢量控制理论设计了一套全数字变频调速系统，介绍了系统结构及软硬件设计方案。

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It is pitching a new ventilation system that would fill a mine with sensors, dampers and louvers along with variable speed fans that will send only the right amount of air to the mine tunnels.

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