Title :
Dual-voltage high power converter for a distributed power system in heavy traction, using high-voltage IGBT´s
Author :
Fratelli, L. ; Giannini, G.
Author_Institution :
Ansaldo Trasporti-CRIS, Napoli, Italy
Abstract :
The design of a two-stage power converter for heavy traction applications, using 3.3 kV 1200 A IGBT modules is presented. The power converter is designed for a dual voltage traction system (3 kV DC, 25 kV AC), so that the first stage is configurable as a step-down or as a four quadrant power converter, whereas the second is an inverter. Initial tests on modules and a thermal analysis revealed that such modules suffer from high losses, so their switching frequency must be kept low, and the employment of liquid cooling is suggested in order for junction temperature and ripple to be limited, and reliability improved
Keywords :
DC-AC power convertors; DC-DC power convertors; bipolar transistor switches; insulated gate bipolar transistors; invertors; power bipolar transistors; power semiconductor switches; power supplies to apparatus; switching circuits; traction; 1200 A; 25 kV; 3 kV; 3.3 kV; distributed power system; dual-voltage power converter; four-quadrant power converter; heavy traction applications; inverter; junction temperature; liquid cooling; power IGBT switches; reliability improvement; step-down power converter; switching frequency; tests; thermal analysis; two-stage power converter; Analog-digital conversion; Employment; Insulated gate bipolar transistors; Inverters; Liquid cooling; Power systems; Switching frequency; Temperature; Testing; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
Conference_Location :
Baveno
Print_ISBN :
0-7803-3500-7
DOI :
10.1109/PESC.1996.548767
