Title :
A soft switcher optimized for IGBTs in PWM topologies
Author :
Ivensky, Gregory ; Sidi, David ; Ben-yaakov, Sam
Author_Institution :
Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
A novel soft switching scheme optimal for IGBTs is described and investigated theoretically and experimentally. The proposed soft switcher applies an auxiliary IGBT switch which is operated for a short time interval during the turn off commutation of the main IGBT. The main advantage of the proposed switcher is ZCS of the main and auxiliary IGBTs during both turn on and turn off while all other power devices are also soft switched. The proposed soft switcher can be implement in various types of PWM topologies. The experimental boost converter was run at a switching frequency of 100 kHz to power levels of 1 kW. The efficiency was measured to be about 95% with a duty cycle of 0.45 and an output voltage of 300 V.
Keywords :
PWM power convertors; equivalent circuits; insulated gate bipolar transistors; nonlinear network analysis; power semiconductor switches; switching circuits; 1 kW; 100 kHz; 300 V; 95 percent; IGBTs; PWM topologies; auxiliary IGBT switch; boost converter; soft switcher; soft switching scheme; turnoff commutation; Inductors; Insulated gate bipolar transistors; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Switching frequency; Topology; Voltage; Zero current switching;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 1995., Eighteenth Convention of
Conference_Location :
Tel Aviv, Israel
Print_ISBN :
0-7803-2498-6
DOI :
10.1109/EEIS.1995.514190
