Title :
A 1 MW GTO thyristor DC chopper with snubber passive energy recovery, for an electric locomotive
Author :
Shirtcliffe, Ian ; Williams, B.W. ; Finney, S.J.
Author_Institution :
Brush Traction Ltd., Loughborough, UK
Abstract :
The paper describes the analysis, design and implementation of a 1 MVA, 1500 V, air cooled GTO thyristor DC chopper used to control the 700 V, 850 A DC motor of an electric locomotive. Because of air cooling and volume constraints, in order to reduce losses, interleaved chopper GTOs are used, each with independent turn-on and turn-off snubber passive energy recovery. The locomotive drive design is complicated by the need for battery backup, hence an intermediate 814 V (under charge) DC rail
Keywords :
DC motor drives; choppers (circuits); cooling; electric locomotives; machine control; protection; railways; secondary cells; snubbers; thyristor motor drives; 1 MVA; 1 MW; 1500 V; 700 V; 814 V; 850 A; DC rail; GTO thyristor DC chopper; air cooled; electric locomotive; interleaved chopper GTOs; losses reduction; motor control; snubber passive energy recovery; turn-off snubber passive energy recovery; turn-on snubber passive energy recovery; Batteries; Choppers; Circuits; Cooling; DC motors; Rails; Snubbers; Thyristors; Traction motors; 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.1996.548835
