Analysis of transients and feedback in magnetic amplifiers

THE TERMS saturable reactor, d-c controllable reactor, transductor, and magnetic amplifier have been used to denote an iron-cored inductor in which the a-c impedance can be controlled by magnetically saturating the core with an auxiliary d-c winding. In this article, the term saturable reactor will be used to denote the iron-cored inductor itself, and the term magnetic amplifier will be applied to the entire circuit which makes use of the properties of the saturable reactor in order to amplify a signal. In many practical magnetic amplifiers, positive feedback is used to increase the amplification.