The control scheme for multi pump operation is thus improved, which changes pump frequency and controls pump operation according to water consumption.
改进了多台水泵的控制方式，即根据系统用水量改变水泵频率从而控制水泵的运行情况。
The applied plan is introduced of frequency control system by the microcomputer for constant -pressure water supply to circulating pump stations, and the system is analysed.
介绍了微机控制变频恒压供水系统在循环泵站中的应用方案，并对系统进行了分析。
Briefly introduce the electricity control principle for the oxygen pump frequency converter of the air separation unit (ASU) in the coal water slurry gasification.
简单介绍了水煤浆装置空分氧泵变频器的电气控制原理。
The frequency converter for oil transfer pump and multistage control for electrohydraulic valve are used to prevent water hammer in oil pipe, and improve the efficiency and safety in oil transmission.
输油泵采用变频器进行调控并结合电液阀的多段控制，避免输油管路产生水击，提高了输油作业的工作效率和安全性。
It can be used in pipe installation buffer type check valve or pump motor use frequency converter and method of soft starter control to reduce the water hammer effect.
可以采用管道安装缓冲式逆止阀或者水泵电机使用变频器及软启动器控制的方法来减少水锤效应。
In the meantime, frequency convertation control water pump and balance valves, regulate valves are necessary and important equipments in system.
同时，变频调速水泵及平衡阀、调节阀是系统中必不可少的重要设备。
The condenser pump frequency conversion revolution plays a key role in the condensed water system automatic control loop.
凝结泵变频改造对凝结水系统中的自动控制系统影响很大。
The condenser pump frequency conversion revolution plays a key role in the condensed water system automatic control loop.
凝结泵变频改造对凝结水系统中的自动控制系统影响很大。
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