Co-host: The Institute of Electrical Engineering of Japan, Japanese Society of Steel Construction, Japan Society of Civil Engineers, Meteorlological Society of Japan, Architectural Institute of Japan, Japan Association for Wind Engineering
Pages 23
Overspeed rotation is one of the most important problem for straight wing vertical axis wind turbines. Rotation is controlled by the mechanical or electromagnetic brake system in existing wind turbines. However, if any trouble occur in brake system, the possibility of breaking wind turbine becomes higher. Therefore, an inhibition mechanism for overspeed rotation was devised, and wind turbine builtin this mechanism was developed. Wind tunnel experiments and field tests with the use of this wind turbine were conducted to investigate whether the rotation can controlled autonomously or not. As a result, it was confirmed that overspeed rotation could never happen in this wind turbine, because the inhibition mechanism of overspeed rotation decelerates the rotation speed of its wind turbine when its rotation speed exceeds upper limit.
