Switch-Core Design and Power Loss

Abstract

Criteria for design of switch cores to be used in a magnetic-matrix switch are established. Core loss is shown to depend only on the average value of net ampere-turns excitation if certain assumptions are made about memory requirements and switch construction. Temperature effects on core output are discussed, and the problem of heat dissipation is considered. Comparison of 2 ferrite and 1 metallic core materials show the latter superior, and specifications are given for a metallic core which should be capable of driving a magnetic memory without cooling although such operation would probably be marginal under worst possible operating conditions.