Synchronous valve is a type of components that have simple structure, reliable capability and low price in hydraulic synchronous control system.

同步阀是一种结构简单、工作可靠、造价低廉的液压同步控制元件。

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To ensure safety and reliability service of electric power system, the research of synchronous control system that is about VCB equipped with PMA is essential.

对永磁操动机构真空断路器的同步控制系统进行研究是保证电力系统安全可靠运行的基础，也是近年来断路器智能化的研究热点之一。

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In order to realize synchronous control, distributed motor synchronous control system based on PLC and frequency conversion and PID control arithmetic are adopted.

本文提出了基于PLC和变频调试技术的集散式同步控制方案和采用PID控制算法实现多电机的同步控制。

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