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TECHNICAL BRIEFS

The Effects of Static and Dynamic Imbalance on a Horizontal Axis Wind Turbine

[+] Author and Article Information
J. P. Borg, R. H. Kirchhoff

Mechanical Engineering Department, University of Massachusetts, Amherst, MA 01003

J. Sol. Energy Eng 119(3), 261-262 (Aug 01, 1997) (2 pages) doi:10.1115/1.2888029 History: Received May 01, 1996; Revised February 01, 1997; Online February 14, 2008

Abstract

In this note the differences between static and dynamic balancing of a wind turbine rotor are addressed. The paper begins with a definition of each type of balancing. It is demonstrated that even if a horizontal axis wind turbine rotor is in static balance, the rotor can still be dynamically imbalanced. Dynamic imbalance can result in a yaw and/or teeter producing torque. A turbine rotor is only in a state of dynamic balance when the principle axes of inertia are aligned with the angular velocity vector. This criteria is illustrated with a point mass model.

Copyright © 1997 by The American Society of Mechanical Engineers
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