Turbine-diven linear controller for electromechanical device and

Details Turbine-diven linear controller for electromechanical device and Turbine-diven linear controller for electromechanical device and

1985-02-14

1987-04-07

Dobeck, B.

Electricity: motive power systems

Miscellaneous

318361, 318541, H02K 1300, H02P 544

Patent

active

046564047

ABSTRACT:
A turbine-driven apparatus and method for generating and linearly controlling periodic bipolar drive signals to drive an electromechanical device, such as a DC motor, in response to an input command signal. The apparatus comprises a rotatable cylindrical commutator driven by a gas turbine, the commutator having two matched half-cylinder conductive sections separated by insulation at the common joints. The turbine also drives an alternator to produce AC power which in turn is rectified to produce DC power. Two pairs of diametrically opposing brushes are held in contact with the rotating commutator. The first pair of brushes connected to the DC power source, is fixed in position. The second pair, connected across the electromechanical load, is adjustable in rotational position relative to the first pair through coupling to a stepper motor. The relative duty cycle of the positive going portion relative to the negative going portion of the bipolar signal is controlled by causing the stepper motor to adjust the rotational position of the second pair of brushes relative to the first pair of brushes.

REFERENCES:
patent: 3192460 (1965-06-01), Wolff et al.
patent: 3340450 (1967-09-01), Stilley et al.
patent: 3961233 (1976-06-01), Fagg
patent: 4425536 (1984-01-01), Larsen

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