Title :
Phase-shifted PWM full-bridge DC-DC converters for automotive applications: reduction of ringing voltages
Author :
Jangwanitlert, A. ; Balda, J.C.
Author_Institution :
Dept. of Electr. Eng., Arkansas Univ., Fayetteville, AR, USA
Abstract :
This work analyzes two solutions for ringing voltage problems occurring in the output voltage of a zero-voltage and zero-current switching phase-shifted pulsewidth modulation full-bridge DC-DC converter intended for automotive applications. An RCD snubber and an active snubber (thereafter called "modified flyback converter" since it includes a flyback converter to provide an additional power supply) are designed to reduce the ringing voltage caused by mainly the interaction among the transformer leakage inductance and circuit parasitic capacitances. This converter with the RCD snubber and the modified flyback converter has efficiencies of 91 % and 92 %, respectively, at 42-V 1-kW full load. The converter without any snubber has a lower efficiency of 88.7 %. Experimental and simulation results are shown to complement the theoretical analysis.
Keywords :
DC-DC power convertors; PWM power convertors; automotive electronics; bridge circuits; phase shifters; power capacitors; power transformers; residual current devices; snubbers; switching convertors; zero current switching; zero voltage switching; 1 W; 42 V; 88.7 percent; 91 percent; RCD snubber; active snubber; automotive applications; circuit parasitic capacitances; modified flyback converter; phase-shifted PWM full-bridge DC-DC converters; ringing voltage reduction; transformer leakage inductance; zero-current switching; zero-voltage switching; Automotive applications; DC-DC power converters; Phase modulation; Pulse transformers; Pulse width modulation; Pulse width modulation converters; Pulsed power supplies; Snubbers; Zero current switching; Zero voltage switching;
Conference_Titel :
Power Electronics in Transportation, 2004
Print_ISBN :
0-7803-8538-1
DOI :
10.1109/PET.2004.1393811
