AC Controller Feasibility Study. Revision A.

Abstract : This report presents design concepts for meeting the established requirements for AC Power Controllers specified in NADC-30-TS-7602 document. Two Solid State Power Controllers (SSPC) were designed: 115V at 5A, 400 Hz and 26V at 1A, 400 Hz. The basic functional requirements for both controllers are as follows: (a) to provide switching between a power bus and the load; (b) to carry rated current with a high degree of efficiency; (c) to provide automatic opening under overload conditions with specified delay characteristic; (d) to provide isolation for control element; and (e) to be capable of being controlled and reset remotely. Since size is a primary constraint, the design effort was directed toward the 115V controller with the greatest power delivery capability. The lower rated units would utilize identical control circuitry but would take advantage of smaller components in the power switching stage. The components and circuits described in this report are representative of controllers requirements with consideration of suitability for hybridization.