초록 ▼

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 fo

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.

대표청구항 ▼

A wind-driven generator comprising A. an electrical generator, B. a wind-responsive rotor mounted on a rotor shaft, C. a speed-increasing transmission having (i) an input shaft coupled to the rotor shaft, (ii) an output shaft coupled to the generator, and (iii) alternative output means differentiall

A wind-driven generator comprising A. an electrical generator, B. a wind-responsive rotor mounted on a rotor shaft, C. a speed-increasing transmission having (i) an input shaft coupled to the rotor shaft, (ii) an output shaft coupled to the generator, and (iii) alternative output means differentially coupled to the output shaft, together with D. means, coupled to said alternative output means, to receive and accumulate energy, exerting and maintaining on said alternative output means a reactive torque increasing with rotation of said alternative output means caused by an increase of power delivered by the rotor, whereby at a design operating condition, rotor shaft torque is so balanced by such reactive torque as to normally transmit power to said output shaft only, and rotor power fluctuations will cause or permit angular movements of the alternative output means in such sense as to smooth the delivery of power to the output shaft.