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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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Research on a novel DC-DC transformer
2011 International Conference on Electric Information and Control Engineering, 2011With the development of power electronic technology and the distributed generations, it is expected that transformer function can be realized by using power devices and the bulk and cost of transformer will be reduced. So the DC-DC transformers whose voltage isn't regulated with the load and the input voltage are focused on in resent years.
null Xianjin Zhang, null Caihong Fan
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The biased transformer DC-to-DC converter
1976 IEEE Power Electronics Specialists Conference, 1976A dc-to-dc converter design based on the constant-current flux-reset principle is presented. Such converters use a mulitude of separate individual half-wave switching sections. Each section consists of a power transistor and a transformer which is reset through an external bias current source.
Manfred Lilienstein, Raymond S. Miller
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Power improvement of piezoelectric transformer based DC/DC converter
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012In this paper a novel strategy to increase the power of piezoelectric transformer (PT) by using a cooling system is presented. A thermal pad is directly attached to a PT to dissipate the heat and enhance the power capacity. In a piezoelectric ceramic the heat increase quickly when the vibration velocity become too large.
Su, Yu-Hao +5 more
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3D TSV transformer design for DC-DC/AC-DC converter
2010 Proceedings 60th Electronic Components and Technology Conference (ECTC), 2010This paper presents a new concept of 3D transformer structure realized by through silicon via (TSV) technology. A set of different turn ratio transformers have been designed and analyzed. The results show that the proposed 3D TSV transformer possesses good performance with small size.
Bo Zhang +7 more
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Noise characteristics of piezoelectric-transformer DC-DC converter
PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196), 2002A piezoelectric-transformer (PT) is expected for a low-electric-noise device because it transmits power by mechanical vibration. However, there has been no study about noise of the PT so far. In this paper, we propose a model which focuses on a parasitic impedance of the PT, and compare its simulated result with an observed common-mode noise in the PT ...
S. Hamamura +3 more
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IEEE Spectrum, 1966
Although conventional transformers are ac, a device that may be termed a dc transformer has been constructed by using superconductors. To provide an understanding of how such a transformer would operate, some of the properties of type I and type II superconductors are reviewed.
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Although conventional transformers are ac, a device that may be termed a dc transformer has been constructed by using superconductors. To provide an understanding of how such a transformer would operate, some of the properties of type I and type II superconductors are reviewed.
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DC-DC Power Conversion Using Smart Piezoelectric Transformers
6th International Energy Conversion Engineering Conference (IECEC), 2008The attractiveness of the smart piezoelectric technology is mainly due to its desirable features of miniaturization and the extreme simplicity of the resulting components compared to widely used wire wound conventional magnetics. As a result, much attention has been focused on the application of Piezoelectric Transformer (PET) in high frequency ...
Ajay Chole, B. G. Fernandes
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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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Research on ZVS Half-Bridge DC/DC Transformer
2017 International Conference on Smart Grid and Electrical Automation (ICSGEA), 2017The DC transformer (DCT) based on half-bridge topology is studied in this paper, analyzes the circuit principle of work, on the basis of this, the characteristics of DCT are studied, zero voltage switching (ZVS) is deducted, and the characteristic of the output voltage and power transmission of DCT are given, as well as the design method and ...
Liu Kun +5 more
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