Implementation of a Wide Input Voltage Resonant Converter with Voltage Doubler Rectifier Topology

Abstract

A new circuit structure of LLC converter is studied and implemented to achieve wide zero-voltage switching range and wide voltage operation such as consumer power units without power factor correction and long hold up time demand, battery chargers, photovoltaic converters and renewable power electronic converters. The dc converter with the different secondary winding turns is adopted and investigated to achieve the wide input voltage operation (50–400 V). To meet wide voltage operation, the full bridge and half bridge dc/dc converters with different secondary turns can be selected in the presented circuit to have three different voltage gains. According to input voltage range, the variable frequency scheme is employed to have the variable voltage gain to overcome the wide input voltage operation. Therefore, the wide soft switching load variation and wide voltage operation range are achieved in the presented resonant circuit. The prototype circuit is built and tested and the experiments are demonstrated to investigate the circuit performance.

Design and Implementation of a Single Switch High Gain Boost Topology: Structure, Ripple Control and ZCS

“…By expanding the amount of active-passive inductance cells, voltage stress on switches is diminished and critical inductance is lowered, but the semiconductor device drive circuit becomes more complicated due to the extra switches. [8] introduces a unique resonant design with a double voltage arrangement and two sets of secondary windings to produce soft switching operation. The disadvantage of this converter is that it has a high number of active switching devices as compared to single-switch designs.…”

Resonant Asymmetrical Half-Bridge Flyback Converter

“…Although the research in [1,2] provides the input voltage range with wide variation range of switching frequency, it also results in efficiency reduction and EMI problems. The multi-level approaches proposed in [3][4][5][6][7][8][9][10][11] make LLC converters extend the operating voltage range, but still have the problems of the number of components, complex structure, and difficult control, so as to make it difficult to balance cost and performance. Based on the reasons above, the flyback-based topologies are still attractive solutions.…”