Title :
About current distribution in paralleled thyristors of very high current controlled rectifiers: analysis of a real case
Author :
Fuentes, Ricardo
Author_Institution :
Dept. of Electr. Eng., Univ. Tecnica Federico Santa Maria, Valparaiso, Chile
Abstract :
It is very well known that in high current transformer-rectifiers several thyristors in parallel must be used in each secondary phase. Current distribution between paralleled thyristors also depends on rectifier structure and this thyristors current not always are given by total secondary phase current divided by the number of thyristors, as in ideal cases. In this paper a real case of current distribution is analyzed for a 35 kA, 6 pulses controlled rectifier. Conclusions and recommendations concerning the selection of thyristors for this type of rectifiers are given.
Keywords :
AC-DC power convertors; current distribution; electric current control; rectifying circuits; thyristor convertors; 19 kA; 35 kA; 6 pulses controlled rectifier; AC/DC high current controlled converters; current distribution; high current transformer-rectifiers; parallel thyristors; paralleled thyristors; secondary phase; secondary phase current; Aluminum; Analog-digital conversion; Bars; Computer aided software engineering; Copper; Current distribution; Current transformers; Pulse transformers; Rectifiers; Thyristors;
Conference_Titel :
Industry Applications Conference, 2002. 37th IAS Annual Meeting. Conference Record of the
Conference_Location :
Pittsburgh, PA, USA
Print_ISBN :
0-7803-7420-7
DOI :
10.1109/IAS.2002.1042804