Contribution to the fast warm-up and close temperature control oven theory

The control loop of a temperature control system is analyzed in terms of an electrical equivalent; and a general theory, applicable to control design of both ON-OFF and PROPORTIONAL types, is developed. PROPORTIONAL type of control for fast warm-up is, for the first time, analyzed, and the advantages over thermostatic ON-OFF types are shown. The peculiar characteristics of the component type oven are presented and discussed from the point of view of design, and suggestions are made with regard to achieving a nonoscillating control with very fast warm-up.