Vacuum pump

Valvular sail power plant

Variable aperture velocity augmented ducted fan wind turbine

Variable diameter wind turbine rotor blades

Variable frequency induction generator

Variable speed distributed drive train wind turbine system

Variable speed machine assembly and method for making the same

Variable speed wind power generation system

Variable speed wind turbine

Variable speed wind turbine

Variable speed wind turbine drive and control system

Variable speed wind turbine generator

Variable speed wind turbine generator

Variable speed wind turbine generator

Variable speed wind turbine generator

Variable speed wind turbine generator

Variable speed wind turbine having a constant speed generator

Variable speed wind turbine having a matrix converter

Variable speed wind turbine having a matrix converter

Variable speed wind turbine having a passive grid side...