RPM ac motors perform like high-horsepower servos with low rotor inertia and high power density in NEMA frame sizes 180, 210, 250, 280 and 440 with permanent magnet rotor construction. The motors are TEBC-rated up to 150 hp with resolver feedback. A finned, laminated 440 frame extends the horsepower range to 800 hp enclosed blower cooled and 1,200 hp with open force ventilated construction.
