Prime-mover dynamo plants – Fluid-current motors – Wind
Patent
1983-01-24
1984-09-04
Dobeck, B.
Prime-mover dynamo plants
Fluid-current motors
Wind
290 44, 52 40, 52295, 52296, 52167, 416120, 416132B, F03D 504, H02P 904
Patent
active
044699565
ABSTRACT:
A windmill installation (10) includes a windmill (12) supported on a tower (18) that includes three legs (20, 22, and 24). The connections of the legs (20, 22, and 24) to their respective bases (36, 37, and 38) are provided by compliance members (30, 32, and 34) that are compliant enough that the natural frequency of axial bending of the windmill installation is less than the frequency with which blades (14) of the windmill (12) pass behind the tower (18). Also, a windmill compliance assembly (28) provides the connection between the windmill (12) and the tower (18) and has enough compliance that the natural frequency of pivotal bending is also below that frequency. As a result, vibration at a resonant frequency of the structure is avoided during normal operation.
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"Wind Power Recent Developments", Energy Technology Review No. 46, edited by D. J. De Renzo, Noyes Data Corporation, Park Ridge, NJ 07656.
Dobeck B.
Ip Paul Shik Luen
U.S. Windpower, Inc.
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