Constant pressure variable speed inverter control booster pump s

Details Constant pressure variable speed inverter control booster pump s Constant pressure variable speed inverter control booster pump s

1996-12-23

1999-08-24

Thorpe, Timothy

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 45, F04B 4906

Patent

active

059416904

ABSTRACT:
A constant pressure variable speed inverter control booster pump system including a control unit, an inverter controlled by the control unit to change output frequency subject to the pressure of the water supply pipe, a motor controlled by the inverter to drive a pump, a pressure transmitter installed to detect the pressure in the water supply pipe, and a pump controlled by the motor to pump water through the water supply pipe, wherein the control unit detects the change of pressure in the water supply pipe, and provides an analog signal DC 0V-10V to the inverter subject to the detection result, causing the inverter to change output frequency to the motor, so as to control the speed of the motor under a constant range.

REFERENCES:
patent: 3775025 (1973-11-01), Maher, Jr. et al.
patent: 4165951 (1979-08-01), Friedman et al.
patent: 4290735 (1981-09-01), Sulko
patent: 5221189 (1993-06-01), Henningsen
patent: 5281101 (1994-01-01), Bevington
patent: 5580221 (1996-12-01), Triezenberg

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