Relation between the Exciting Voltage Waveform and the Stability of Oscillation in the Parametric Motor

The relation between the exciting voltage waveforms and the stability of oscillation in the parametric motor is discussed. The main conclusions drawn from this study are as follows: (1) The stable region of the parametric motor excited by square wave voltage is larger than that excited by triangular and sinusoidal wave voltage. (2) The parameter which has a direct effect upon the stability of parametric oscillation is the time variation of inductance.