Decicycle magnetic-amplifier systems for servos

MAGNETIC-AMPLIFIER CIRCUITS, which once were limited to several-cycle delays, have been improved by the availability of high-performance rectangular core materials, as well as by the introduction of circuits which yield a complete response within a half cycle. The adoption of pulse techniques, which employ only magnetic and semiconductor materials, has made it possible to design decicycle magnetic-amplifier systems which have response times in t h e order of one - tenth to one-hund redth of a cycle of the power-supply frequency. It is possible, as a result, to make response-time delays negligible in many rapid closed-loop systems; also, inherent delays which have introduced undesired phase-lag characteristics in a system can be eliminated effectively.