Title :
A zero-voltage and zero-current switching full bridge DC-DC converter with transformer isolation
Author :
Jeon, Seong-Jeub ; Cho, Gyu-Hyeong
Author_Institution :
Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
9/1/2001 12:00:00 AM
Abstract :
A new primary-side-assisted zero-voltage and zero-current switching full bridge DC-DC converter with transformer isolation is proposed. The proposed DC-DC converter uses only one auxiliary transformer and two diodes to obtain ZCS for the leading leg. It has a simple and robust structure, and load current control capability even in short circuit conditions, The possibility of magnetic saturation due to asymmetricity of circuits or transient phenomena is greatly reduced, which is a very attractive feature in DC-DC converters with transformer isolation. The power rating of the auxiliary transformer is about 10% of that of the main transformer. Operation of a 12 kW prototype designed for welding application was verified by experiments
Keywords :
DC-DC power convertors; bridge circuits; electric current control; short-circuit currents; switching circuits; transformers; welding; 12 kW; auxiliary transformer; circuit asymmetricity; diodes; load current control capability; magnetic saturation; power rating; robust structure; short circuit conditions; transformer isolation; transient phenomena; welding; zero-current switching full bridge DC-DC converter; zero-voltage switching full bridge DC-DC converter; Bridge circuits; Circuit faults; Current control; DC-DC power converters; Diodes; Leg; Magnetic circuits; Robust control; Switching converters; Zero current switching;
Journal_Title :
Power Electronics, IEEE Transactions on
