Title :
Active snubber circuit for source commutated converters utilizing the IGBT in the linear region
Author :
Kjellqvist, Tommy ; Norrga, Staffan
Author_Institution :
R. Inst. of Technol., Stockholm
Abstract :
This paper describes a gate control method where an IGBT is controlled in its linear region by means of a closed control loop in order to regulate the voltage slope during turn-on and to clamp the voltage of an anti-parallel diode in a source commutated converter. Controlling the voltage slope may be necessary in a high voltage converter to avoid emission of EMI or to avoid triggering oscillations which may cause insulation failure. Controlling the switching trajectory without influence from the device characteristics is important where series-connection is necessary to increase the overall blocking voltage. The control method has been verified by means of a prototype.
Keywords :
AC-AC power convertors; closed loop systems; commutators; insulated gate bipolar transistors; machine control; power bipolar transistors; snubbers; switching convertors; IGBT; active snubber circuit; anti-parallel diode; closed control loop; gate control method; high voltage converter; insulation failure; linear region; source commutated converters; voltage slope; Clamps; Electromagnetic interference; Frequency conversion; Insulated gate bipolar transistors; Open loop systems; Semiconductor diodes; Snubbers; Switching circuits; Switching converters; Voltage control; AC/AC converter; EMC/EMI; High Voltage power converters; High frequency power converter; IGBT; Soft switching;
Conference_Titel :
Power Electronics and Applications, 2007 European Conference on
Conference_Location :
Aalborg
Print_ISBN :
978-92-75815-10-8
Electronic_ISBN :
978-92-75815-10-8
DOI :
10.1109/EPE.2007.4417408
