Title:
BLADE BEAM FOR SUPPORTING ROTOR BLADE OF WIND FORCE POWER GENERATOR AND PRODUCTION THEREOF
Document Type and Number:
Japanese Patent JPS6035180
Kind Code:
A
Abstract:
Wind generator apparatus employs an induction generator with a wind-driven rotor. Connection of the induction generator to AC power lines is controlled by apparatus that compares generator rpm and line frequency. The rotor blades have a pretwisted, varying-chord inboard portion and an untwisted, constant-chord outboard portion. The blades are self-starting, operate efficiently over a range of wind speeds with constant pitch maintained by a torsional biasing mechanism, and pitch up automatically when the normal rpm operating range is exceeded. An improved blade-supporting spar of low torsional stiffness has an I-beam configuration with filament-wound flanges. A pitch damper prevents torsional oscillations while permitting the blades to pitch up readily. The rotor, which includes a teetering hub, is free to weather-vane about the axis of a supporting tower, but a yaw damper limits angular velocity. A guy wire and gin pole arrangement stabilizes the tower and permits easy raising and lowering of the tower.
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Inventors:
JIEE WAAN KAATAA JIYUNIYA
JIEE WAAN KAATAA SHINIYA
JIEE WAAN KAATAA SHINIYA
Application Number:
JP14041384A
Publication Date:
February 22, 1985
Filing Date:
July 06, 1984
Export Citation:
Assignee:
JIEE WAAN KAATAA JIYUNIYA
JIEE WAAN KAATAA SHINIYA
JIEE WAAN KAATAA SHINIYA
International Classes:
F03D11/00; F03D1/06; F03D7/02; F03D9/00; F03D11/04; H02J3/40; (IPC1-7): F03D11/00
Domestic Patent References:
| JPS532899A | 1978-01-12 | |||
| JP42027425A | ||||
| JP39022342A | ||||
| JP34002858A |
Attorney, Agent or Firm:
Masao Okabe
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