Fluid-rotating apparatus

Details Fluid-rotating apparatus Fluid-rotating apparatus

1993-01-29

1994-05-24

Gluck, Richard E.

Pumps

Condition responsive control of pump drive motor

With plural separate drive motors for single pump unit

417338, 417410C, F04B 4906

Patent

active

053143124

ABSTRACT:
A fluid-rotating apparatus comprises a positive displacement pump structure section for rotating the rotary shaft of each of a plurality of rotors synchronously. In controlling the synchronous rotation of the rotary shafts by a PLL control method, a gain-switching means device is provided to set a high gain in a PLL control circuit when the rotary shafts are accelerating or decelerating and setting a low gain therein when the rotary shafts are rotating in a steady state.

REFERENCES:
patent: 4718833 (1988-01-01), Berger

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