Title :
Switching losses and and operational frequency limitations of GTO thyristors in PWM inverters
Author :
Heumann, Klemens ; Jung, Matthias
Author_Institution :
Inst. fuer Allgemeine Elektrotech., Tech. Univ. Berlin, West Germany
Abstract :
The losses of GTO thyristors in pulse width-modulated (PWM) inverters are investigated on the basis of the theoretical switching waveforms. Snubber losses, derived from the dynamic device parameters, prove to increase overproportionately with the inverter power, and a novel low-loss snubber is presented. Other limitations on the operational frequency are demonstrated. Theoretically obtained switching losses of GTO thyristors with and without snubbers show good agreement with experimental test data.<>
Keywords :
invertors; losses; pulse width modulation; semiconductor switches; thyristor applications; GTO thyristors; PWM inverters; low-loss snubber; operational frequency limitations; pulse width modulation; snubber losses; switching losses; theoretical switching waveforms; Frequency; Magnetic separation; Pulse width modulation; Pulse width modulation inverters; Snubbers; Switching circuits; Switching loss; Tail; Thyristors; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18226
