A current fed full bridge DC DC converter with an active flyback and passive auxiliary circuits
A phase shift PWM topology with an active fly back snubber in the primary side and passive auxiliary circuit on the secondary side of the isolation transformer is presented in this paper. The use of a flyback snubber suppress the voltage oscillations produced due to current mismatch between the input current fed inductor and primary side leakage inductance of the isolation transformer. Thus, minimize the current entering through the power switches at the input side. The passive auxiliary circuit consists of passive components to reduce the conduction losses. The proposed topology obtains soft switching over a wide load range with maximum conversion ratio. The principle of operation of the proposed topology features is first described, and then converter analysis and simulation results of the proposed technique are presented.
2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS)