Title :
Novel protection strategy for current interruptions in IGBT current source inverters
Author :
Haberberger, Markus ; Fuchs, Friedrich W.
Author_Institution :
Christian-Albrechts-Univ., Kiel, Germany
Abstract :
A novel protection strategy against dc link overvoltages in IGBT current source inverters caused by current interruptions is presented. The proposed concept consists of two steps-a fast passive voltage clamp and actively turned on freewheeling paths across the dc link terminals. To implement this strategy, an electronic circuit was developed and successfully tested. The protection circuit is completely independent from normal inverter operation, has no effect on the CSI behaviour and can be realized at low cost.
Keywords :
clamps; insulated gate bipolar transistors; invertors; overvoltage protection; power semiconductor switches; CSI; IGBT current source inverters; current interruptions; dc link overvoltages; electronic circuit; freewheeling paths; insulated gate bipolar transistors; inverter operation; passive voltage clamp; protection circuit; Bridge circuits; Inductors; Insulated gate bipolar transistors; Inverters; Leg; Power semiconductor switches; Protection; Semiconductor diodes; Switching circuits; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
Print_ISBN :
0-7803-8399-0
DOI :
10.1109/PESC.2004.1355808
