Vertical axis wind turbine with blade tensioner

Details Vertical axis wind turbine with blade tensioner Vertical axis wind turbine with blade tensioner

1994-06-20

1996-07-02

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Radially extensible or retractible rotor working member

416194, 416227A, 416DIG8, F03D 306

Patent

active

055315674

ABSTRACT:
A Darrieus-type vertical axis wind turbine with tensioned blades is disclosed, along with various mechanisms for tensioning the blades. When the wind turbine is stationary in high wind conditions, the blades are tensioned to resist buckling. When the wind turbine is coming up to operational speed, or slowing down to a stop, the blades may also be tensioned to change the dynamic resonance characteristics of the rotor to avoid operation at resonant frequencies.

REFERENCES:
patent: 4082479 (1978-04-01), Rangi et al.
patent: 4281965 (1981-08-01), Sternholm
patent: 4329116 (1982-05-01), Ljungstrom
patent: 4500257 (1985-02-01), Sullivan
patent: 4575311 (1986-03-01), Wood
patent: 4624624 (1986-11-01), Yum
patent: 4808074 (1989-02-01), South
Loth et al., Advanced Wind Turbine Design Study, Research Proposal, West Virginia University. Jan. 1, 1990.
Loth, et al., "Advanced Wind Turbine Design Study On VAWT With Fully Articulated Blades Using Mechanical Harmonic Blade Pitch Modulation Improving Self-Starting, Low Wind Speed Speed Cut-in and Overspeed Control" submitted to Solar Energy Research Institute; Sep. 15, 1989.

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