インバータ駆動圧縮機用電動機の不安定現象について

抄録

In recent years, the problem of unstable phenomena generated in inverter-fed induction motor has been taken up.
In this paper, at first, the effect of motor specifications on the stability of PWM inverter-fed induction motor, is investigated experimentally.
That is, the relation between the unstable phenomena and air gap length, rotor resistance and moment of rotor inertia, is studied.
Next, a method for preventing the growth of unstable phenomena in inverter-fed compressor motor is proposed.
By this method, unstable regions are eliminated from the range of practical driving.
Features of this method are illustrated.