Transformer less Dc – Dc Converter with high Step up Voltage gain Method
Citation
K.Raja Gopal, B. Gavaskar Reddy, M.Venkateswara Reddy, S.Srikanth, K.Suresh. "Transformer less Dc – Dc Converter with high Step up Voltage gain Method". International Journal of Engineering Trends and Technology (IJETT),V2(3):43-48 Nov to Dec 2011. ISSN:2231-5381. www.ijettjournal.org. Published by Seventh Sense Research Group.
Abstract
A new circuit is proposed for a steep step - up of the line voltage. It integrates a switched - capacitor (SC) circuit with in a boost converter. An SC circuit can achieve any voltage ratio, allowing fo r a boost of the input voltage to high values. It is un regulated to allow for a very high efficiency. The boost stage has a regulation purpose. It can operate at a relatively low duty cycle, thus avoiding diode - reverse recovery problems. The new circuit i s not cascade interconnection of the two power stages; their operation is integrated. The simplicity and robustness of the solution, the possibility of getting higher voltage ratios than cascading boost converters, without using transformers with all their problems, and the good overall efficiency are the benefits of the proposed converter .
References
[1] B. Bryant and M. K. Kazimierczuk, “Voltage - loop power - stage transfer functions with MOSFET delay for boost PWM converter operating in CCM,” IEEE Trans. Ind. El ectron., vol. 54, no. 1, pp. 347 - 353, Feb. 2007.
[2] X. Wu, J. Zhang, X. Ye, and Z. Qian, “Analysis and derivations for a family ZVS converter based on a new active clamp ZVS cell,” IEEE Trans. Ind. Electron., vol. 55, no. 2, pp. 773 - 781, Feb. 2008.
[3] D. C. Lu, K. W. Cheng, and Y. S. Lee, “A single - switch continuous conduction - mode boost converter with reduced reverse - recovery and switching losses,” IEEE Trans. Ind. Electron., vol. 50, no. 4, pp. 767 - 776, Aug. 2003.
[4] N. P. Papanikolaou and E. C. Tat akis, “Active voltage clamp in flyback converters operating in CCM mode under wide load variation,” IEEE Trans. Ind. Electron., vol. 51, no. 3, pp. 632 - 640, Jun. 2004.
Keywords
SC, voltage ratio, converters, transformers.