| Abstract |
In the paper the performance of some new GTO devices developed for the use in resonant or soft-switched converters for medium frequency applications is investigated. Modifications of the GTO fabrication process are discussed, which improve the device performance in this environment. The behaviour of several standard and modified devices was analysed, by means of a suitable test circuit, showing that the energy loss per cycle can be considerably lowered by a proper design of the device and driver circuit . Accordingly, the useful frequency range of the GTO can be increased up to 50kHz, without significant power derating. |
