Results 171 to 180 of about 2,945 (218)

Integrated three-phase transformerless PV inverter

2012 IEEE International Symposium on Industrial Electronics, 2012
This paper proposes a transformerless PV converter in which both dc-dc boost and inverter stages are implemented by using a single standard three-leg inverter. The proposed solution furnishes an important level of component count reduction of active devices, which means cost, size and losses reductions in power switches and diodes.
Euzeli C. dos Santos, Alexandre M. Farias, Marcelo Cabral Cavalcanti, Fabrício Bradaschia   +3 more
openaire   +2 more sources

A New Common-Mode Transformerless Photovoltaic Inverter

IEEE Transactions on Industrial Electronics, 2015
Transformerless inverters are being widely used in grid-connected photovoltaic (PV) generation systems. Transformer elimination, in grid-connected PV systems, has many advantages. This not only reduces cost, size, and weight, but also increases the whole system efficiency. However, once the transformer is removed, there is no galvanic isolation between
Nimrod Vázquez, Marco Rosas, Claudia Hernández, Eslí Vázquez, Francisco J. Pérez-Pinal   +4 more
openaire   +2 more sources

A high resolution transformerless bridge

Journal of Physics E: Scientific Instruments, 1982
An AC bridge has been developed for use in precision control applications. The four-lead design avoids the bulk and expense of transformer designs and achieves a resolution of 30 nV Hz-1/2 with a short-term stability of 100 nV h-1.
openaire   +1 more source

An Optimized Transformerless Photovoltaic Grid-Connected Inverter

IEEE Transactions on Industrial Electronics, 2011
Unipolar sinusoidal pulsewidth modulation (SPWM) full-bridge inverter brings high-frequency common-mode voltage, which restricts its application in transformerless photovoltaic grid-connected inverters. In order to solve this problem, an optimized full-bridge structure with two additional switches and a capacitor divider is proposed in this paper ...
Huafeng Xiao, Shaojun Xie, Yang Chen, Ruhai Huang   +3 more
openaire   +1 more source

Transformerless Resonant Inverters for Induction Heating Applications

Proceedings of IEEE. AFRICON '96, 2002
The aim of the paper is to present transformerless induction heating converters by adding an additional reactive element to the resonant tank. As shown in the paper matching between heating inductor and inverter can be achieved by adequately choice of the third reactive element of the resonant tank.
E.J. Dede, E. Maset, J.M. Espi, A. Ferreres   +3 more
openaire   +1 more source

On synthesis of immitance matrices of transformerless RLC networks

2009 European Conference on Circuit Theory and Design, 2009
A new set of sufficient conditions for nonminimal realization of square matrix of real rational functions in com­plex frequency, as admittance matrix of passive, transformer­less, common-ground RC network with nonminimal number of capacitors, is presented.
Dragan Kandic, Branimir Reljin
openaire   +2 more sources

Photovoltaic H6-type transformerless inverter topology

2016 IEEE Annual India Conference (INDICON), 2016
The concept of transformerless inverters has become a future trend for single phase photovoltaic grid — tied systems. The major factor to be considered while employing transformerless inverters in such applications is the leakage currents. The lack of transformers in inverters, implemented between PV panel and grid results in a galvanic connection and ...
Aparna Das, G. Sheeja
openaire   +1 more source

A novel transformerless hybrid series active filter

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012
This paper proposes a novel configuration of Series hybrid active filters. The proposed configuration could be connected to the grid without requiring a costly series injection transformer. This topology is capable of compensating current harmonics at the source and voltage distortion at the point of common coupling.
Alireza Javadi, Handy Fortin Blanchette, Kamal Al-Haddad   +2 more
openaire   +1 more source

A Quality Transformerless Audio Amplifier

IETE Journal of Education, 1976
The theory and construction of a transformerless audio amplifier is described. The significant feature of the amplifier is the use of smaller output transistors in parallel for getting an overall added power output. The paralleling of output transistors avoids the difficulty of obtaining a single transistor of large enough capability, which may not be ...
openaire   +1 more source

Transformerless zero removal synthesis

Journal of the Franklin Institute, 1966
Abstract The zeros in the even part of a positive real function exhibit quadrantal symmetry. If some of these zeros are located in a certain region of the complex plane, not all of the coefficients of the numerator of the real part are positive. The present work applies the extension of Richards' theorem in order to remove a set of quadrantal zeros ...
openaire   +1 more source