High Voltage Thyristors Adjusted for Usage in Series Assemblies and Stacks on Their Basis for Usage in Soft Starters of Electric Motors

7 February 2012

By
Dmitry Presnyakov

Igor Vetrov / "Proton-Electrotex", Head of operation reliability laboratory
Alexander Stavtsev 
/ "Proton-Electrotex", Technical Director
Alexey Surma
 / "Proton-Electrotex", Head of research and development center

In spite of significant development of converters on the basis of fully controlled semiconductor stacks (IGBT, GTO, IGCT), today it's still technically legitimate and demandable to use "traditional" high power thyristors in stacks of controlled rectifiers as well as in soft starters of electric motors. Usage of thyristors is especially relevant in case of operating in AC network of 6/10 kV and higher, because the devices produced on the basis of such thyristors have no competition in price and energy efficiency (efficiency coefficient).
That's why development and production of high voltage thyristors is of current interest

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