Current Transformer Application for Power Switching Transistor Drive

Abstract

Current transformers present inherent advantages for driving power switching transistors over alternative driving methods. This paper presents advantages and design problems of current transformer drives in two applications: a) free running push-pull inverter b) switched mode regulator Each application is discussed with respect to: Driver circuit application Design problem analysis of 20 kHz current transformer Performance analysis Northern Telecom uses inverters and P.W.M. converters with current transformer drives designed by the author. They show excellent reliability, performance, and efficiency exceeding 90%.