Title :
A 20 MVA amplifier for a fusion research experiment
Author :
Crookes, R.W ; Subramanian, T.K. ; Ballad, J.P. ; Hay, J.H. ; Edwards, D.C.
Author_Institution :
GEC Alsthom Eng. Res. Centre, Stafford, UK
Abstract :
A four quadrant switching amplifier rated at 20 MVA and with a voltage response time of 25 μs depending on circuit conditions, has been designed, built and tested. Five GTOs are connected in parallel in each arm of a bridge circuit to produce an output capability of ±2 kV and ±10 kA. The purpose of the amplifier is to study the control of plasma current disruptions in a Tokamak fusion experiment and this means it only needs to be rated for short (<100 ms) current pulses. Comprehensive monitoring is provided and seventy signals are monitored at 50 μs intervals
Keywords :
Tokamak devices; bridge circuits; fusion reactor instrumentation; power amplifiers; power supplies to apparatus; pulsed power technology; thyristor convertors; 20 MVA; 25 mus; 50 mus; GTOs; Tokamak; bridge circuit; four quadrant switching power amplifier; fusion research experiment; monitoring; plasma current disruptions; voltage response;
Conference_Titel :
Power Electronics and Variable-Speed Drives, 1994. Fifth International Conference on
Conference_Location :
London
DOI :
10.1049/cp:19940968
