Search

Employing an L-C-L filter cell to modify the half-bridge converter (HBC), a HBC with input current ripple reduction (HBC-CRR) is proposed. In addition to having low-voltage stress, lossless snubbing, and voltage-clamping features inherited from its predecessor, the proposed converter can shape input current waveform of HBC to a nonpulsating fashion. Consequently, the ripple and undesired harmonic components of the input current can be significantly reduced without adding a large input filter. These characteristics make it suitable for high frequency, high efficiency, high-input voltage, and low electromagnetic interference (EMI) dc distribution power conversion applications. In addition to the circuit analysis and design consideration, moreover, a proposed converter and a HBC with the same specification, 360–400-V input, 12-V/20-A output, and 100-kHz switching frequency, are built and tested for the purpose of the comparison. Several performance comparisons are made to demonstrate the superiority of the proposed converter over HBC. [ABSTRACT FROM AUTHOR]

A new full-wave rectifier is proposed in this paper. By integrating the proposed rectifier with a classic current-fed converter as an example, a dual-inductor boost converter with ripple cancellation is presented. It has several features, such as high voltage gain with smaller transformer turns ratio, recovery of the transformer secondary leakage energy, low voltage stress on the rectifier diodes, and nonpulsating input and output currents. These properties make it desirable for high-frequency high-efficiency high-voltage-gain applications, such as the renewable energy source power system. In addition to the circuit analysis and design, a 150-kHz 24–36-V-input 200-V/600-W-output converter prototype is implemented and tested to demonstrate its feasibility. [ABSTRACT FROM AUTHOR]