Accession Number : AD0815603

Title :   TWO STATE-MODULATION TECHNIQUES FOR POWER SYSTEMS.

Descriptive Note : Semi-annual rept. no. 1, 1 Jun-1 Dec 66,

Corporate Author : BOSE CORP FRAMINGHAM MA

Personal Author(s) : Froeschle, Thomas A.

Report Date : JUN 1967

Pagination or Media Count : 78

Abstract : This work covers the investigation of techniques and circuitry based on the use of two-state modulation systems, directed toward development of improved advanced power conditioning equipment. Improvements are sought with respect to smaller, lighter-weight, more efficient and, hence, highly reliable power conversion systems for military use. Theoretical and experimental studies are being pursued through construction of three different experimental breadboard models: a regulator unit which supplies a regulated 28vdc output voltage at up to 50 amperes current drain from unregulated dc inputs; a converter unit which supplies multiple regulated high voltage dc outputs, 700v and 300v, from a nominal 28vdc input; and an ac (115v) to regulated dc (12v) 25 amp isolated supply. The investigation to date has centered on block diagram and system considerations. Component availability has also been investigated and some work completed on circuit techniques. A new current controlled two-state modulation system is under investigation which provides a simple, stable solution to problems in power conditioning associated with current sharing and protection. Initial breadboard models of the three required units have been constructed with resulting characteristics approaching those required. (Author)

Descriptors :   *POWER EQUIPMENT), (*MODULATION, HALL EFFECT, DIODES, TRANSISTORS, STABILITY, VOLTAGE REGULATORS, MAGNETIC CORES, TABLES(DATA), POWER TRANSFORMERS, DIFFERENTIAL EQUATIONS, INVERTER CIRCUITS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE