Optimisation of the reverse conducting IGBT for zero-voltage switching applications such as induction cookers
- Author(s): Iraj Sheikhian 1 ; Nando Kaminski 1 ; Stephan Voß 2 ; Wolfgang Scholz 2 ; Elmar Herweg 3
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View affiliations
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Affiliations:
1:
University of Bremen, Bremen, Germany;
2: Infineon Technologies AG, Neubiberg, Germany;
3: E.G.O. Elektro-Gerätebau GmbH, Oberderdingen, Germany
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Affiliations:
1:
University of Bremen, Bremen, Germany;
- Source:
Volume 8, Issue 3,
May 2014,
p.
176 – 181
DOI: 10.1049/iet-cds.2013.0215 , Print ISSN 1751-858X, Online ISSN 1751-8598
The reverse conducting-IGBT (RC-IGBT) is a well suited device for soft switching applications, that is, zero voltage switching (ZVS). However, standard RC-IGBTs are optimised for hard switching, which shows different switching waveforms compared with soft switching. In this study, the optimisation of the RC-IGBT is described for soft switching applications using the example of an induction cooker. The investigated induction cooker is implemented by using the single-ended quasi-resonant topology. Simulations show that main losses of the induction cooker occur in the induction coil and the RC-IGBT (power switch). The performance of the coil can be improved mainly by minimising the coil resistance. The IGBT-optimisation is based on the reduction of tail current in the soft switching mode. The IGBT thickness is decreased and the local lifetime is used to achieve lower tail current. A reduction of the overall losses by 30% is achievable. As a result, the cooling system of the IGBT can be smaller and cheaper.
Inspec keywords: zero voltage switching; resonant power convertors; insulated gate bipolar transistors; induction heating; domestic appliances
Other keywords: cooling system; RC-IGBT; local lifetime; switching waveforms; power switch; coil resistance; soft switching mode; hard switching; zero-voltage switching application; induction cooker; single-ended quasiresonant topology; induction coil; reverse conducting-IGBT optimization; tail current reduction
Subjects: Domestic appliances; Power electronics, supply and supervisory circuits; Bipolar transistors; Insulated gate field effect transistors
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