Results 271 to 280 of about 6,032 (308)
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2013 IEEE Power & Energy Society General Meeting, 2013
This paper presents a transformer-less dc-dc converter with large voltage gain for medium voltage dc grid applications. The converter is based on a combination of boost converter and a series-parallel resonant circuit with capacitive output filter. Soft-switching of the power switches and diodes are naturally achieved due to the resonant operation. The
Hussain Athab, Amir Yazdani, null Bin Wu
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This paper presents a transformer-less dc-dc converter with large voltage gain for medium voltage dc grid applications. The converter is based on a combination of boost converter and a series-parallel resonant circuit with capacitive output filter. Soft-switching of the power switches and diodes are naturally achieved due to the resonant operation. The
Hussain Athab, Amir Yazdani, null Bin Wu
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An asymmetric VHF self-oscillating DC-DC converter with integrated transformer
2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS), 2015The paper presents a self-oscillating DC-DC integrated converter which is operable in the frequency range of 200MHz–260MHz. The circuit includes a cascoded power stage, and an integrated transformer. The primary of the transformer provides the transmission of power to the converter load.
R. Akbar +3 more
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A Resonant DC-DC transformer with Zero Current Ripple
IEEE 36th Conference on Power Electronics Specialists, 2005., 2006The paper presents a resonant converter topology capable of providing zero ripple conditions (ZRC) at either its input or output current. The basic properties of the proposed topology are discussed in detail. The remarkable symmetry and the proportional voltages of the circuit allow it to maintain ripple-less current independent of the load or ...
A.A. Abramovitz, K. Smedley
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Transformer-less DIDO DC-DC converter for EV's
2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016A transformer-less dual input dual output (DIDO) dc converter is proposed in this paper. This converter finds its application in fields of hybrid power system and hybridization of energy sources for electric vehicles. Supply of the output loads, charging and discharging of the battery / energy storage system can be made from the fuel cells (FC) or ...
Paul Davis, Aathira Karuvaril Vijayan
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Computer-aided analysis of electronic DC-DC transformers
IEEE Transactions on Industrial Electronics, 1988An approach to the analysis of electronic DC-to-DC transformers using the SPICE simulation program as an aid is presented. In this approach, the minimum separable switching configuration (MISSCO) of a DC-to-DC transformer is first identified and its equivalent circuit determined before analysis and simulation are carried out on the complete converter ...
Y.-S. Lee, Y.C. Cheng
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Applications of DC Transformer in DC Distributed Generations System
Advanced Materials Research, 2013DC transformer with high frequency and efficiency under a fixed duty cycle is widely used in dc distributed generations. In this paper, the topologies and equivalent circuits of single /bidirectional full-bridge non-resonant DC transformers are presented.
Xian Jin Zhang, Bu Gen Wang
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A Resonant DC–DC Transformer With Zero Current Ripple
IEEE Transactions on Power Electronics, 2007The paper presents a resonant converter topology capable of providing zero ripple conditions at either its input or output current. The basic properties of the proposed topology are discussed in detail. The remarkable symmetry and the proportional voltages of the circuit allow it to maintain ripple-less current independent of the load or switching ...
Alexander Abramovitz, Keyue Smedley
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Efficiency improvement of piezoelectric-transformer DC-DC converter
PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196), 2002Piezoelectric-transformers (PT) have a lot of merits in comparison with magnetic transformers. We have previously presented some types of piezoelectric-transformer DC-DC converters (PT-converters) for AC-adapters, but their efficiency was restricted. The maximum efficiency was less than 80%.
T. Yamane +5 more
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A Family of Zero-Voltage-Switching DC-DC Transformers
Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06., 2006A family of zero-voltage-switching (ZVS) dc-dc transformers is proposed in the paper. Utilizing the magnetizing current, all switches can realize ZVS independent of input voltage and load. A ZVS push-pull forward dc-dc transformer is used to illustrate the concept. The switches' ZVS condition is theoretically analyzed.
Z. Yao, L. Xiao, Y. Yan
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Developing DC Transmission Networks Using DC Transformers
IEEE Transactions on Power Delivery, 2010This paper studies principles of developing dc transmission grids based on high power dc/dc converters. There has been much research on dc/dc converters and it is likely that some megawatt size units will achieve commercialisation stage soon. In this study, we assume that electronic dc transformers can achieve three functions: 1) voltage stepping, 2 ...
Dragan Jovcic, Boon Teck Ooi
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