Control system for a vertical axis windmill

Details Control system for a vertical axis windmill Control system for a vertical axis windmill

1981-09-03

1983-10-18

Truhe, J. V.

Prime-mover dynamo plants

Electric control

Fluid-current motors

290 55, 416 17, 416 35, 416115, F03D 700, H02P 904

Patent

active

044108060

ABSTRACT:
A vertical axis windmill having a rotating structure is provided with a series of articulated vertical blades whose positions are controlled to maintain a constant RPM for the rotating structure, when wind speed is sufficient. A microprocessor controller is used to process information on wind speed, wind direction and RPM of the rotating structure to develop an electrical signal for establishing blade position. The preferred embodiment of the invention, when connected to a utility grid, is designed to generate 40 kilowatts of power when exposed to a 20 mile per hour wind. The control system for the windmill includes electrical blade actuators that modulate the blades of the rotating structure. Blade modulation controls the blade angle of attack, which in turn controls the RPM of the rotor. In the preferred embodiment, the microprocessor controller provides the operation logic and control functions. A wind speed sensor provides inputs to start or stop the windmill, and a wind direction sensor is used to keep the blade flip region at 90.degree. and 270.degree. to the wind. The control system is designed to maintain constant rotor RPM when wind speed is between 10 and 40 miles per hour.

REFERENCES:
patent: 3902072 (1975-08-01), Quinn
patent: 4168439 (1979-09-01), Palma

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