Half-wave magnetic amplifier circuit input power

THE MECHANISM OF AMPLIFICATION of the self-saturating magnetic amplifier, in general, consists of its flux control of the magnetic core. In order to control the flux level in the core, the core loss must be supplied from the control circuit during the control half-cycle of the specific core. In order to demonstrate the correlation between the input power and the reset core loss in the case of the half-wave magnetic amplifier circuit, the authors introduce a mathematical model which leads to a simplified method of circuit analysis, though the actual phenomena are rather complicated. The simplified analysis assumes the reset half cycle can be closely represented by a synchronous switch in the circuit during the time the gate circuit is open. The core characteristics during the resetting interval are assumed to be those of a rectangular hysteresis loop material in which the variation of the dynamic hysteresis loop is proportional to the rate of the core flux change, i.e.,