Title :
An efficient high frequency high power off-line DC-DC converter topology
Author :
Agelidis, Vassilios G. ; Ziogas, Phoivos D. ; Joos, Geza
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
A full-bridge switch mode PWM (pulse-width modulation) DC-DC converter topology is discussed. It minimizes switching losses and resulting stresses through the use of a DC bus active snubber. This circuit ensures that the switch parasitic (or discrete) capacitances are discharged before switch turn-on and the associated energy is returned to the DC bus. The resulting converter performance includes near-zero switching losses as well as protection from DC bus shoot-throughs. A complete analysis and design procedure are presented. Theoretical results have been verified experimentally on a 2 kW, 20 kHz laboratory prototype.<>
Keywords :
bridge circuits; losses; power convertors; pulse width modulation; switching; 2 kW; 20 kHz; DC bus; DC bus shoot-throughs; discrete capacitances; full-bridge; high frequency; high power; near-zero switching losses; off-line DC-DC converter topology; protection; pulse-width modulation; switch mode PWM; switch parasitic capacitances; switching losses reduction; Circuit topology; DC-DC power converters; Frequency conversion; Pulse width modulation; Pulse width modulation converters; Stress; Switches; Switching circuits; Switching converters; Switching loss;
Conference_Titel :
Power Electronics Specialists Conference, 1990. PESC '90 Record., 21st Annual IEEE
Conference_Location :
San Antonio, TX, USA
DOI :
10.1109/PESC.1990.131186
