Torque ripple in a Darrieus, vertical axis wind turbine
Interaction between a steady wind and a rotating, Darrieus, vertical axis wind turbine produces time periodic aerodynamic loads which cause time dependent torque variations, referred to as torque ripple, to occur in the mechanical link between the turbine and the electrical generator. There is concern for the effect of torque ripple upon fatigue life of drive train components and upon power quality. An analytical solution characterizing the phenomenon of torque ripple has been obtained which is based upon a Fourier expansion of the time dependent features of the problem. Numerical results for torque ripple, some experimental data, determination of acceptable levels and methods of controlling it, are presented and discussed.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5085957
- Report Number(s):
- SAND-80-0475
- Country of Publication:
- United States
- Language:
- English
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Torque ripple in a vertical axis wind turbine
Fourier coefficients of aerodynamic torque functions for the DOE/Sandia 17-m vertical axis wind turbine