Results 241 to 250 of about 222,901 (291)
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2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014, 2014
This letter introduces a new versatile Y-shaped impedance network for realizing converters that demand a very high-voltage gain, while using a small duty ratio. To achieve that, the proposed network uses a tightly coupled transformer with three windings, whose obtained gain is presently not matched by existing networks operated at the same duty ratio ...
Siwakoti, Yam Prasad +3 more
exaly +6 more sources
This letter introduces a new versatile Y-shaped impedance network for realizing converters that demand a very high-voltage gain, while using a small duty ratio. To achieve that, the proposed network uses a tightly coupled transformer with three windings, whose obtained gain is presently not matched by existing networks operated at the same duty ratio ...
Siwakoti, Yam Prasad +3 more
exaly +6 more sources
IEEE Transactions on Power Electronics, 2016
A novel A-source impedance network is proposed in this letter. The A-source impedance network uses an autotransformer for realizing converters for any application that demand a very high dc voltage gain. The network utilizes a minimal turns ratio compared to other Magnetically Coupled Impedance Source (MCIS) networks to attain a high voltage gain.
Siwakoti, Y. P. +3 more
exaly +6 more sources
A novel A-source impedance network is proposed in this letter. The A-source impedance network uses an autotransformer for realizing converters for any application that demand a very high dc voltage gain. The network utilizes a minimal turns ratio compared to other Magnetically Coupled Impedance Source (MCIS) networks to attain a high voltage gain.
Siwakoti, Y. P. +3 more
exaly +6 more sources
2007 European Conference on Power Electronics and Applications, 2007
Most inverters designed to date can only perform either voltage-buck or boost operation with buck-boost mode usually attained by introducing additional active semiconductor devices and passive components to the inverters. Although effective, adding active switches will complicate the inverter control, and push up the overall system costs.
Goh, Ailian +3 more
openaire +2 more sources
Most inverters designed to date can only perform either voltage-buck or boost operation with buck-boost mode usually attained by introducing additional active semiconductor devices and passive components to the inverters. Although effective, adding active switches will complicate the inverter control, and push up the overall system costs.
Goh, Ailian +3 more
openaire +2 more sources
Drawbacks of impedance networks
International Journal of Circuit Theory and Applications, 2017SummaryThis paper presents the influence of voltage‐fed impedance networks, known as Z‐source and quasi–Z‐source, as well as some more sophisticated networks on the static and dynamic properties of voltage source inverters. The impedance networks increase output voltage distortions with the second harmonic of the fundamental harmonic and decrease the ...
Zbigniew Rymarski, Krzysztof Bernacki
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IEEE Transactions on Industrial Electronics, 2017
Impedance networks have been already investigated in various literature with the main goals of increasing the attainable voltage gain and reducing the components number. Recently, coupled inductors found popularity because they let converters with lower weight and cost.
Amir Hakemi +2 more
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Impedance networks have been already investigated in various literature with the main goals of increasing the attainable voltage gain and reducing the components number. Recently, coupled inductors found popularity because they let converters with lower weight and cost.
Amir Hakemi +2 more
openaire +1 more source
Tunable impedance matching network
2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007This work presents a RF tunable impedance matching circuit. It uses a quarter-wavelength (lambda/4) transmission line loaded by a combination of switches, capacitors and inductors. With MEMS-based switches and inductors, the simulation results show that this circuit is capable of correction load reflection coefficients of up 0.5 to better than 0.38 ...
Karolinne Brito, Robson Nunes de Lima
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Impedance Network for an Automatic Impedance Matching System
2007 Asia-Pacific Microwave Conference, 2007This work presents a RF tunable impedance matching network. It uses a quarter-wavelength (lambda /4) transmission line loaded by a combination of switches, capacitors and inductors. With MEMS-based switches and inductors, the simulation results show that this circuit is capable of correction load reflection coefficients of up 0.5 to better than 0.3 ...
Karolinne Brito de Brito +1 more
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Network-assisted procedure for impedance dissemination
Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510), 2004A technique for disseminating impedance measurement units from National Metrology Institutes to secondary laboratories is proposed in this paper. Such a technique takes advantage of a client-server application over the Internet and employs a commercially available impedance calibrator with computer-interfacing capabilities.
CARULLO, Alessio +2 more
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On The Equivalent Impedance of Two-Impedance Self-Similar Ladder Networks
IEEE Transactions on Circuits and Systems II: Express Briefs, 2021Recurrent ladder network models are encountered in the analysis of many natural systems including wave propagation in transmission lines, porous electrode/electrolyte interfaces and viscoelastic (bio)materials. Here we re-visit the equivalent impedance of self-similar ladder networks composed of two arbitrary impedances recursively arranged, with the ...
A. S. Elwakil +2 more
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Network Impedance Transformations
2013This chapter discusses impedance matching. The author elaborates the following topics : L-type matching circuits; T-type matching circuits; and balanced L- or balanced T-type circuits.
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