sentences:  Instead, the rotor shaft is attached directly to the generator, which spins at the same speed as the blades.Advantages of PMDD generators over gear-based generators include increased efficiency, reduced noise, longer lifetime, high torque at low rpm, faster and precise positioning, and drive stiffness.PMDD generators "eliminate the gear-speed increaser, which is susceptible to significant accumulated fatigue torque loading, related reliability issues, and maintenance costs."