Title :
A Novel Transformer-less Adaptable Voltage Quadrupler DC Converter with Low Switch Voltage Stress
Author :
Ching-Tsai Pan ; Chen-Feng Chuang ; Chia-Chi Chu
Author_Institution :
Dept. of Electr. Eng., Nat. TsingHua Univ., Hsinchu, Taiwan
Abstract :
In this paper, a novel transformer-less adjustable voltage quadrupler dc-dc converter with high-voltage transfer gain and reduced semiconductor voltage stress is proposed. The proposed topology utilizes input-parallel output-series configuration for providing a much higher voltage gain without adopting an extreme large duty cycle. The proposed converter cannot only achieve high step-up voltage gain with reduced component count but also reduce the voltage stress of both active switches and diodes. This will allow one to choose lower voltage rating MOSFETs and diodes to reduce both switching and conduction losses. In addition, due to the charge balance of the blocking capacitor, the converter features automatic uniform current sharing characteristic of the two interleaved phases for voltage boosting mode without adding extra circuitry or complex control methods. The operation principle and steady analysis as well as a comparison with other recent existing high step-up topologies are presented. Finally, some simulation and experimental results are also presented to demonstrate the effectiveness of the proposed converter.
Keywords :
DC-DC power convertors; MOSFET; active diodes; active switches; automatic uniform current sharing characteristic; blocking capacitor; component count reduction; high step-up topologies; high step-up voltage gain; high-voltage transfer gain; input-parallel output-series configuration; interleaved phases; low switch voltage stress; operation principle; semiconductor voltage stress reduction; steady analysis; transformer-less adjustable voltage quadrupler dc-dc converter; voltage boosting mode; voltage rating MOSFET; Capacitors; Energy storage; Inductors; Steady-state; Stress; Switches; Topology; Automatic uniform current sharing; high step-up converter; low voltage stress; transformer-less; voltage quadrupler;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2013.2287020