ENHANCED OPERATION OF GATE-TURN-OFF THYRISTORS WITH A LIQUIDNITROGEN COOLING PHASE FOR 20-10 KV POTENTIAL POWER CON- DITIONING

Award Information
Agency: Department of Energy
Branch: N/A
Contract: N/A
Agency Tracking Number: 7744
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1988
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
750 Braddock Avenue, E Pittsburgh, PA, 15112
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 STEPHEN B KUZNETSOV
 () -
Business Contact
 Jeffrey S Malashock
Phone: (412) 829-1205
Research Institution
N/A
Abstract
THE PHASE I PROJECT CONSISTS OF A FEASIBILITY DEMONSTRATION FOR LOW TEMPERATURE OPERATION OF HIGH POWER GATE-TURN-OFF (GTO) THYRISTORS THAT USE THE MATRIX MULTIPLIER GATE PATTERN, AND FOR CONTINUOUS OPERATION OF THE DEVICES AT LIQUID NITROGEN TEMPERATURES. THE GTO WILL BE AN 80 MM DEVICE WITH A BLOCKING CAPABILITY OF 4.5 KV AND A SURGE CURRENT RATING OF 44,000 A. THE OBJECTIVE OF THIS PROJECT IS THE ENHANCEMENT OF REVERSE RECOVERY CHARGE, BLOCKING, AND SURGE CURRENT CHARACTERISTICS IN THE TEMPERATURE RANGE 77 K TO 150 K. PRELIMINARY ANALYSIS INDICATES A 70% REDUCTION IN TURN-OFF TIME BY USING HIGH RESISTIVITY FLOAT-ZONE SILICON WITH A (1-1-1)/1 DEGREES ORIENTATION. THE EXPERIMENTAL R&D PROGRAM IN PHASE I HAS SIX 80 MM DIAMETER WAFER GTO THYRISTORS FABRICATED WITH THE GATE LAYOUT AND STACKED IN SERIES FOR AN OPERATING POTENTIAL OF 22-25 KV AT 1.0-3.0 KA. EACH GTO STACK MODULE PROVIDES A MAXIMUM CONTINUOUS OUTPUT POWER HANDLING OF 75 MW AND SURGE POWER CAPABILITY OF 1.1 GW AT THE LIQUID NITROGEN TEMPERATURE AFFORDED BY A TURN-OFF TIME OF 30 MICROSECONDS.

* Information listed above is at the time of submission. *

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