3、恒压给水,单片机,变频器,PID调节Abstract:Through change the frequency to adjust the press of the water supply system ,the control device can improve the water supply environment of the water pipe net biggest.The system can according the varieble tube net pressure to regulate the water pump motor to turn a
4、utomatically and decide if more water pump engineering used or not,so it can make the exit of the net's main stem to keep at the constant pressure that settled, the whole water supply system keeps always efficiently economic and circulate in the best situation efficiently.The frequency-chang
5、e constant pressure water supply system contains the transduser, the PID regulated part, the pressure censor and the low-pressure electricity divice etc., use pumps to carry on constant press variable speed water supply system .It spreads the censor’s feeling to know the net’ated part, after
6、 analysis operation, sigle-chip microcomputer outputs the signal to change the frequency of the transduer, use the transduer output to control water pump’s speed.While it can control the pump number by the net’s variable pressure, while water supply is very few or no man use water,enter the
7、pump enter the dormancy appearance,第15页共15页黄冈职业技术学院(套读)黄石理工学院毕业论文 these are all controled by the sigle-chip microcomputer. This text put forward a kind of frequency-change variable speed project.That system do not need the water tower or the pressu