Electro-magnetic closed-loop speed control for air-turbine...

Details Electro-magnetic closed-loop speed control for air-turbine... Electro-magnetic closed-loop speed control for air-turbine...

2011-08-02

2011-08-02

Patel, T C (Department: 2839)

Prime-mover dynamo plants

Electric control

Fluid-current motors

C290S055000

Reexamination Certificate

active

07989972

ABSTRACT:
A method an apparatus for providing speed control in a spindle system are provided. The apparatus includes an air turbine spindle that rotates at a speed, an electromagnetic device coupled to the spindle for creating a torque to maintain a desired speed of the spindle, and a tachometer for generating a measurement of the rotational speed of the spindle. The electromagnetic device applies a torque to the spindle in response to the measurement to change the speed of the spindle to the desired speed.

REFERENCES:
patent: 4523305 (1985-06-01), Cheeseboro
patent: 4749930 (1988-06-01), Faville et al.
patent: 5010722 (1991-04-01), Yamaguchi et al.
patent: 5576905 (1996-11-01), Garcia et al.

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