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A Power Drive Unit converts electrical or hydraulic power into mechanical motion (often rotary) and drives a mechanical actuation system.

Moog鈥檚 heritage in power drive units covers electrical and hydraulic inputs in torque and speed summed configurations.聽 Hybrid hydraulic/electric-powered drives have been used in some applications.聽 Power drive hardware includes hydraulic motors and control modules, electric motors, reduction gearing, stop modules, torque limiters, and braking mechanisms.