Analytical Determination of Characteristics of Magnetic Amplifiers with Feedback

An analytical method is developed for predetermining the steady-state characteristics of magnetic amplifiers with feedback. The magnetization curve is expressed in a convenient functional form and analytical relations among the direct control current, alternating output current and applied alternating voltage are derived for two different feedback circuits. Magnetic amplifiers without feedback are included as limiting cases. Simultaneous conduction of the rectifiers which occurs in feedback circuits during portions of the cycle is taken into account and explained. Experimental checks confirm the soundness of the analysis throughout.