Method of accurately setting the flow rate of a variable-flow me

Details Method of accurately setting the flow rate of a variable-flow me Method of accurately setting the flow rate of a variable-flow me

1986-09-29

1987-10-27

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417415, 222 14, 222 61, 222642, F04B 4906, B67D 530, G04C 508

Patent

active

047026740

ABSTRACT:
A pump in accordance with the invention has moving equipment (32) driven by a reversible synchronous motor (42) whose windings (44, 45) are connected to a power source by means of optocoupled triacs (48, 49) which, under microprocessor control, are used to adjust the flow rate of the pump by acting on its admission period (by powering the windings in one direction) and on the pumping cycle time (by varying the period for which the pump is unpowered in each cycle).

REFERENCES:
patent: 3915651 (1975-10-01), Nishi
patent: 4321014 (1982-03-01), Eburn
patent: 4475666 (1984-10-01), Bilbrey et al.
patent: 4572405 (1986-02-01), Miura
patent: 4633413 (1986-12-01), Iauqney et al.
Micropump published by the Review of Scientific Instruments, vol. 43, No. 9 (Sep. 1972).

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