Title :
Low loss high gain 300 V-200 A class normally-off SIT module for DC motor control
Author :
Aoki, Shinobu ; Tsukiyama, Naoshi ; Irie, Toshimitsu ; Tadano, Hiroshi ; Nishizawa, Jun-ichi
Author_Institution :
Toyoda Autom. Loom Works Ltd., Aichi, Japan
Abstract :
A 300 V, 200 A normally-off-type SIT (static induction transistor) module has been fabricated. The module consists of two 100 A planar-gate SIT chips which show a current gain of 325 and voltage gain of 0.23 V at I/sub D/=100 A. The design, fabrication and electrical characteristics are discussed. Improved trade off between the current gain and breakdown voltage has been obtained by improving the design of the guard ring and the field rings. Double-laser metallization increased the effective area on the chip surface. The device has been developed to raise the operational frequency of the DC chopper to 15 kHz and eliminate the acoustic noise generated by the equipment. In this application, efficiency of 98% has been obtained.<>
Keywords :
DC motors; choppers (circuits); field effect transistors; 200 A; 300 V; DC chopper; DC motor control; acoustic noise; breakdown voltage; design; double layer metallisation; electrical characteristics; fabrication; field rings; guard ring; normally-off SIT module; planar-gate; static induction transistor; Automatic control; Bipolar transistors; Choppers; Communication system control; DC motors; Fabrication; Frequency; Low voltage; Neodymium; Power control;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18199
