Method of an apparatus for varying the load on an A.C. generator

Details Method of an apparatus for varying the load on an A.C. generator Method of an apparatus for varying the load on an A.C. generator

1982-01-29

1984-03-20

Rubinson, G. Z.

Prime-mover dynamo plants

Electric control

Fluid-current motors

322 29, 322 35, H02P 540

Patent

active

044383410

ABSTRACT:
The variation of the load on a wind-driven A.C. generator (16) in accordance with a predetermined law which relates the load to the speed of rotation, is achieved by detecting the period of each half cycle with the aid of a timing unit (10), calculating the percentage conduction required in each half cycle in accordance with the predetermined mathematical law, and using the calculated result to gate a pair of thyristors (12, 14) to conduct for said calculated percentage in alternate half cycles so as to pass a unidirectional current to said load. By variation of conduction during each half cycle the effective resistance of the load can be matched to the voltage output of the A.C. generator over a wide range of speeds. Not only can the efficiency of the system be increased, but the windmill is prevented from being stalled in light breezes.

REFERENCES:
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patent: 3388585 (1983-06-01), Nola
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patent: 4146264 (1979-03-01), Korzeniewski
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patent: 4198572 (1980-04-01), Kant
patent: 4242628 (1980-12-01), Mohan et al.
patent: 4395669 (1983-07-01), Berna et al.

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