You searched for: “variable speeds
variable-speed (s) (noun), variable-speeds (pl)
Describing a wind turbine in which the rotor speed increases and decreases with changing wind forces, producing electricity with a fluctuating level of power and voltage.

Contrasted with a fixed-speed turbine, which has a virtually constant rotor speed; typically a 1-2% variation.

This entry is located in the following unit: vari- (page 2)