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。
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