Accession Number : AD0845111

Title :   High Power Modulator Techniques (SCR).

Descriptive Note : Final rept. 28 Nov 67-30 Jul 68,

Corporate Author : WESTINGHOUSE ELECTRIC CORP BALTIMORE MD SURFACE DIV

Personal Author(s) : Smith, R. A.

Report Date : NOV 1968

Pagination or Media Count : 60

Abstract : Development and test of a 65KV Silicon Controlled Rectifier demonstrates the application of solid state devices and their inherent reliability in high power pulse modulator techniques. The design exploits the high voltage and high current capabilities of the SCR. Eighty devices in series yield a minimum holdoff voltage of 65KV; the test modulator switches pulse currents of 375 amperes although the SCRs have a 1000 ampere minimum peak pulse current capability. The 65KV SCR switch assembly employs a 'building block' concept utilizing ten, 6.5KV SCR switch assemblies. An electro-optical triggering technique eliminates trigger pulse transformers which require high voltage insulation between primary and secondary windings. These techniques are applicable to even higher voltage SCR switch assemblies. (Author)

Descriptors :   (*MODULATORS, SILICON CONTROLLED RECTIFIERS), (*SILICON CONTROLLED RECTIFIERS, ELECTRONIC SWITCHES), TRIGGER CIRCUITS, FLASH LAMPS, XENON, SATURABLE REACTORS, CONTROL PANELS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE