Prime-mover dynamo plants – Electric control – Fluid-current motors
Patent
1978-09-27
1980-12-16
Truhe, J. V.
Prime-mover dynamo plants
Electric control
Fluid-current motors
290 55, 60398, F03D 900, H02P 904, F16D 3102
Patent
active
042399777
ABSTRACT:
An alternator, powered by a wind rotor having pitch changeable blades, is maintained at a fixed speed despite variations in wind speed and cyclic perturbations in rotor shaft speed due to rotor dynamics. In one embodiment, a geared speed increaser, coupling the rotor to the alternator, is mounted for reversible rotation relative to the rotor shaft. A fluid transfer means, such as a torque motor, coupled to a pressurized accumulator, applies such a torsional reaction to the speed increaser to permit its rotation at a rate which accommodates the difference between the instantaneous rotor shaft speed and that rotor shaft speed corresponding to the alternator's fixed speed. The fluid transfer means and accumulator means together permit a maximum angular displacement of the speed increaser sufficient to provide a time interval in which the rotor blade pitch may be corrected and the rotor shaft returned to normal speed. Pitch changes are effected, in part, responsive to rotation of the speed increaser.
REFERENCES:
patent: 3973873 (1976-08-01), Shank
patent: 4112311 (1978-09-01), Theyse
patent: 4160170 (1979-07-01), Harner et al.
Conklin John B.
Gross Jerome A.
Gross Jerome A.
Strutman Lauren
Strutman Lisa
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