文章分析了数字式交流伺服系统中的电子齿轮环节的作用，介绍了电子齿轮的基本原理。
The paper analyzes the operation of electronic gear in the digital AC servo system, introduces the principle of the electronic gear.
介绍了开发的全数字交流伺服系统的组成、基本原理及软、硬件结构。
The developed digital AC servo system construction, basic principle and hardware and software structures are presented.
在济钢ASP1700薄板坯连铸连轧项目中，连铸机结晶器调宽系统采用了新型全数字交流伺服控制系统，代表当今世界最先进控制水平。
In the project of ASP1700 thin slab continuous casting and rolling, the system of mould width adjust in the continuous casting is equipped with the new digital alternating servo control system.
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