Control features for a wind turbine that control the turbine over a range
of wind speeds and under triggering conditions with reduced noise, cost,
and reliability issues associated with other such controls. Control is
accomplished via control electronics, which adjust the torque produced by
the electrical output generation device (e.g., alternator) within the
wind turbine. During normal operation, torque is adjusted for optimum
aerodynamic performance and maximum output of power. In winds above rated
power, the control circuit regulates torque to lower aerodynamic
performance, as necessary to maintain desired power level output. In
triggering conditions, such as during simultaneous control circuit
failure and loss of some portion of the electrical output generation
device in extreme winds, wind turbine control is accomplished by
increasing torque (e.g., via a separate controller) from the electrical
output generation device via shorting of windings, so as to cause
retardation of blade rotation.