Development of a twin-shaft, synchronous motor for dry vacuum pumps

摘要

A twin-shaft, synchronous motor had been developed for dry vacuum pumps in an effort to minimize the size as well to enable energy saving. Two motor rotors, directly connected to a pump rotor, undergo a synchronous inversion by one motor stator and drive the pump. The two motor rotor design allowed a compactness by the minimization in the over all motor length. The advantages of a brushless DC motor are fully made use of and high efficiency is enabled not only for rated operations but also for the widely fluctuating load of dry vacuum pumps. The following outlines this motor.