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 power 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 implemented in various types of PWM topologies. The experimental boost power 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 :
DC-DC power convertors; PWM power convertors; bipolar transistor switches; circuit testing; commutation; insulated gate bipolar transistors; network analysis; power bipolar transistors; power semiconductor switches; switching circuits; 1 kW; 100 kHz; 300 V; 95 percent; DC/DC; boost power converter; commutation; power IGBTs; soft switching; switching frequency; turn off; turn on; Insulated gate bipolar transistors; Pulse width modulation; Pulse width modulation converters; Resonance; Switches; Switching converters; Switching frequency; Topology; Voltage; Zero current switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1995. APEC '95. Conference Proceedings 1995., Tenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2482-X
DOI :
10.1109/APEC.1995.469047
