Combined variable-speed drive and speed reducer for pumps and fa

Details Combined variable-speed drive and speed reducer for pumps and fa Combined variable-speed drive and speed reducer for pumps and fa

1998-04-01

1999-09-07

Ta, Khoi Q.

Planetary gear transmission systems or components

Input from independent power sources

Condition responsive motor control

475153, 622284, F16H 372, F16H 3706

Patent

active

059478543

ABSTRACT:
A variable speed drive for fans and pumps. An impeller is connected to a primary motor and an auxiliary motor/generator through a transmission. The transmission includes an epicyclic gearing system. The primary motor is run at constant speed. The auxiliary motor/generator is driven at variable speeds to control the speed of the impeller. The device may be used to retrofit an existing pump or fan system.

REFERENCES:
patent: 2433194 (1947-12-01), Bedford et al.
patent: 4112311 (1978-09-01), Theyse
patent: 4423794 (1984-01-01), Beck
patent: 4514991 (1985-05-01), Zinsmeyer
patent: 4574656 (1986-03-01), McCarthy et al.
patent: 4686378 (1987-08-01), Sisk
patent: 4973295 (1990-11-01), Lee
patent: 5039281 (1991-08-01), Johnston

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