Tesis sobre el tema "High Frequency Planar Transformer"
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Wong, Fu Keung y n/a. "High Frequency Transformer for Switching Mode Power Supplies". Griffith University. School of Microelectronic Engineering, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050211.110915.
Texto completoWong, Fu Keung. "High Frequency Transformer for Switching Mode Power Supplies". Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367650.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Microelectronic Engineering
Full Text
Kotte, Hari Babu. "High Frequency (MHz) Resonant Converters using GaN HEMTs and Novel Planar Transformer Technology". Doctoral thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-20894.
Texto completoHigh Frequency Switch Mode Power Supplies
Ambatipudi, Radhika. "High Frequency (MHz) Planar Transformers for Next Generation Switch Mode Power Supplies". Doctoral thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-20270.
Texto completoPrasai, Anish. "Methodologies for Design-Oriented Electromagnetic Modeling of Planar Passive Power Processors". Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34164.
Texto completoMaster of Science
Besri, Abdelhadi. "Modélisation analytique et outils pour l'optimisation des transformateurs de puissance haute fréquence planars". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00612344.
Texto completoJansson, Vincent, David Bergman y Niklas Hermansson. "High Frequency Transformer : Implementation of prototype". Thesis, Uppsala universitet, Elektricitetslära, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-387307.
Texto completoAl-Alawi, Hamed. "High frequency modeling of a transformer winding". Thesis, Al-Alawi, Hamed (2012) High frequency modeling of a transformer winding. Other thesis, Murdoch University, 2012. https://researchrepository.murdoch.edu.au/id/eprint/13092/.
Texto completoLi, Jeffrey. "Integrated High Frequency Transformer Design Virtual Laboratory". Thesis, Griffith University, 2015. http://hdl.handle.net/10072/380060.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Eng & Built Env
Science, Environment, Engineering and Technology
Full Text
LI, QUAN y q. li@cqu edu au. "HIGH FREQUENCY TRANSFORMER LINKED CONVERTERS FOR PHOTOVOLTAIC APPLICATIONS". Central Queensland University. N/A, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060830.110106.
Texto completoLi, Jie. "High frequency power transformer modelling for frequency response analysis (FRA) diagnosis". Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538489.
Texto completoShen, Wei. "Design of High-density Transformers for High-frequency High-power Converters". Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28280.
Texto completoPh. D.
Tavakoli, Hanif. "A High Frequency Transformer Winding Model for FRA Applications". Licentiate thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11178.
Texto completoNg, Wing Lun. "Low-voltage high-frequency CMOS transformer-feedback voltage-controlled oscillators /". View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?ECED%202006%20NG.
Texto completoMuhammed, Adil Hussein. "High frequency transformer design and modelling using finite element technique". Thesis, University of Newcastle Upon Tyne, 2000. http://hdl.handle.net/10443/747.
Texto completoLesser, Beverly Brown. "Thermal-magnetic finite element model of a high frequency transformer". Thesis, Virginia Tech, 1989. http://hdl.handle.net/10919/44121.
Texto completoIn high-frequency power transformers, magnetic material properties cannot be assumed to be constant. These properties vary with frequency, temperature, and magnetic flux density. Heat generation is, in turn, a function of the magnetic permeability, magnetic flux density, and frequency. Current design methods are either empirical or based on linear, uncoupled models. To better understand the relationship between heat transfer, magnetic flux density, material properties, and core geometry in a miniature, high-frequency transformer, a finite-element program has been developed to solve the coupled thermal-magnetic equations for an axisymmetric transformer. The program accounts for nonlinear temperature and magnetic field dependent material properties, geometry, and driving frequency.
The program, HT-MAG, is based on a series of derived magnetic field equations. The Ritz method is applied to the magnetic and thermal equations in the development of the program. The program alternately solves the finite element approximations to the thermal and magnetic governing equations until the magnetic properties match within a specified fraction or a maximum number of iterations are performed. In addition, the program can be linked with existing pre- and post-processors or can accept manual pre- and post-processing.
Six test cases were run to test the validity of the program. The first two cases tested the uncoupled heat transfer calculations. One of these tested the thermal conduction calculations while the other tested the heat generation calculations. The next two cases tested the uncoupled magnetic equations. The first was a direct current (DC) case, while the second was an alternating current (AC) case. The final two cases tested the thermal magnetic coupling. Solutions to these cases are presented and discussed.
Master of Science
KRISHNAN, RAJESH. "ANALYSIS OF HIGH-FREQUENCY CHARACTERISTICS OF PLANAR COLD CATHODES". University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1061215895.
Texto completoSagaale, Mohamoud. "High frequency modelling of a transformer winding for partial discharge localization". Thesis, Sagaale, Mohamoud (2013) High frequency modelling of a transformer winding for partial discharge localization. Other thesis, Murdoch University, 2013. https://researchrepository.murdoch.edu.au/id/eprint/22265/.
Texto completoXue, Jing. "Single-phase vs. Three-phase High Power High Frequency Transformers". Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/32919.
Texto completoMaster of Science
Fontana, Christian. "Solid State Transformer". Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3424940.
Texto completoIl trasformatore a stato solido (SST) è un emergente tecnologia che può sostituire i trasformatori convenzionali, apportando notevoli vantaggi grazie alle sue potenzialità e funzionalità. Tra le più importanti abbiamo: -condizionamento del flusso di potenza, sia DC che in AC; -ridotte dimensioni e peso, grazie all'uso di un trasformatore in alta frequenza; -ottima regolazione della tensione; -limita diffusione di buchi di tensione; -correzione del fattore di potenza; -hold up time funzionalità; -isolamento galvanico. Grazie a queste funzionalità questa tecnologia diventa molto importante per poter affrontare problemi, presenti e futuri, legati alla gestione della rete elettrica. La possibilità di gestire il flusso di energia e la bidirezionalità del flusso di potenza consentono di facilitare l'integrazione delle risorse rinnovabili con la rete elettrica. Inoltre, la riduzione dipeso e dimensioni consentono di ottenere alte performance in sistemi usati per la trazione.
Karamat, Asghar. "High frequency inverter-transformer-cycloconverter system for DC to AC (3-phase) power conversion". Thesis, Brunel University, 1991. http://bura.brunel.ac.uk/handle/2438/5195.
Texto completoLucas, Davidson Glenn. "High Frequency Direct Excitation of Small-Scale Motions in Planar Shear Flows". Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10579.
Texto completoSu, Yipeng. "High Frequency, High Current 3D Integrated Point-of-Load Module". Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51248.
Texto completoPh. D.
Sterk, Douglas Richard. "Compact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectification". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9648.
Texto completoMaster of Science
Yan, Ning. "High-frequency Current-transformer Based Auxiliary Power Supply for SiC-based Medium Voltage Converter Systems". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/101507.
Texto completoM.S.
Recently, 10 kV silicon carbide (SiC) MOSFET receives strong attention for medium voltage applications. Asit can switch at very high speed, e.g. > 50 V/ns, the converter system can operate at higher switching frequency condition with very small switching losses compared to silicon (Si) IGBT [8]. However, the fast dv/dt noise also creates the common mode current via coupling capacitors distributed inside the converter system, thereby introducing lots of electromagnetic interference (EMI) issues. Such issues typically occur within the gate driver power supplies due to the high dv/dt noises across the input and output of the supply. Therefore, the ultra-small coupling capacitor (<5 pF) of a gate driver power supply is strongly desired.[37] To satisfy the APS demands for high power modular converter system, a solution is proposed in this thesis. This work investigates the design of 1 MHz isolated APS using gallium nitride (GaN) devices with medium voltage insulation reinforcement. By increasing switching frequency, the overall converter size could be reduced dramatically. To achieve a low Ccm value and medium voltage insulation of the system, a current-based transformer with a single turn on the sending side is designed. By adopting LCCL-LC resonant topology, a current source is formed as the output of sending side circuity, so it can drive multiple loads importantly with a maximum of 120 W. At the same time, ZVS can use realized with different load conditions. The receiving side is a regulated stage, so the output voltage can be easily adjusted and it can operate in a load fault condition. Different insulation solutions will be introduced and their effect on Ccm will be discussed. To further reduce Ccm, shielding will be introduced. Overall, this proposed APS can achieve a breakdown voltage of over 20 kV and PDIV up to 16.6 kV with Ccm<5 pF. Besides, multi-load driving ability is able to achieve with a maximum of 120 W. ZVS can be realized. In the end, the experiment results will be provided.
Maricar, Mohamed Ismaeel. "Design of circuits to enhance the performace of high frequency planar Gunn diodes". Thesis, De Montfort University, 2014. http://hdl.handle.net/2086/10858.
Texto completoTavakoli, Hanif. "An FRA Transformer Model with Application on Time Domain Reflectometry". Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-48568.
Texto completoQC 20111122
Sung, Wang-Kyung. "High-frequency tri-axial resonant gyroscopes". Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52936.
Texto completoZhao, Sen Peng. "Design and implementation of a frequency response test system for instrument voltage transformer performance studies". Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/design-and-implementation-of-a-frequency-response-test-system-for-instrument-voltage-transformer-performance-studies(3e65a4d8-937e-4a3d-8308-734e03f29255).html.
Texto completoIuravin, Egor. "Transformer Design For Dual Active Bridge Converter". Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1532601248778308.
Texto completoZhang, Zhemin. "High-frequency Quasi-square-wave Flyback Regulator". Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/77434.
Texto completoPh. D.
Zhao, Shishuo. "High Frequency Isolated Power Conversion from Medium Voltage AC to Low Voltage DC". Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/74969.
Texto completoMaster of Science
Wang, Shen. "Modeling and Design of Planar Integrated Magnetic Components". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34400.
Texto completoMaster of Science
Li, Quan y q. li@cqu edu au. "DEVELOPMENT OF HIGH FREQUENCY POWER CONVERSION TECHNOLOGIES FOR GRID INTERACTIVE PV SYSTEMS". Central Queensland University. School of Advanced Technologies & Processes, 2002. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20020807.152750.
Texto completoHashimoto, Kazuki. "Analysis and Design of Air-Core Transformer Based on Internal Magnetic Flux Density Distribution for High-Frequency Power Converter". Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263662.
Texto completoKotte, Hari Babu. "High Speed (MHz) Switch Mode Power Supplies (SMPS) using Coreless PCB Transformer Technology". Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13964.
Texto completoMurthy, Bellur Dakshina S. "Hard-Switching and Soft-Switching Two-Switch Flyback PWM DC-DC Converters and Winding Loss due to Harmonics in High-Frequency Transformers". Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1278704361.
Texto completoLi, Qiang. "Low-Profile Magnetic Integration for High-Frequency Point-of-Load Converter". Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/28637.
Texto completoPh. D.
Ammanambakkam, Nagarajan Dhivya. "Design of HF Forward Transformer Including Harmonic Eddy Current Losses". Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1292874300.
Texto completoShahabi, Ghahfarokhi Neda. "Minimising capacitive couplings and distributing copper losses in planar magnetic elements". Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/43466/1/Neda_Shahabi_Ghahfarokhi_Thesis.pdf.
Texto completoDanekar, Abhishek V. "Analysis and Design of High-Frequency Soft-Switching DC-DC Converter for Wireless Power Charging Applications". Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1493990400812363.
Texto completoAhmed, Mohamed Hassan Abouelella. "Power Architectures and Design for Next Generation Microprocessors". Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/103175.
Texto completoDoctor of Philosophy
With the rapid increase of cloud computing and the high demand for digital content, it is estimated that the power consumption of the IT industry will reach 10 % of the total electric power in the USA by 2020. Multi-core processors (CPUs) and graphics processing units (GPUs) are the key elements in fulfilling all of the digital content requirements but come with a price of more power-hungry processors, driving the power per server rack to 20 KW levels. The need for more efficient power management solutions on the architecture level, down to the converter level, is inevitable. The data center manufacturers have recently adopted a more efficient architecture that supplies a 48V DC server rack distribution instead of a 12V DC distribution to the server motherboard. This helped reduce costs and losses, but as a consequence, raised a challenge in the design of the DC/DC voltage regulator modules (VRM) supplied by the 48V, in order to power the CPU and GPU. In this work, different architectures will be explored for the 48V VRM, and the trade-off between them will be evaluated. The main target is to design the VRM with very high-efficiency and high-power density to reduce the cost and size of the CPU/GPU motherboards. First, a two-stage power conversion structure will be used. The benefit of this structure is that it relies on existing technology using the 12V VRM for powering the CPU. The only modification required is the addition of another converter to step the 48V to the 12V level. This architecture can be easily adopted by industry, with only small modifications required on the system design level. Secondly, a single-stage power conversion structure is proposed that achieves higher efficiency and power density compared to the two-stage approach; however, the structure is very challenging to design and to meet all requirements by the CPU/GPU applications. All of these challenges will be addressed and solved in this work. The proposed architectures will be designed using an optimized magnetic structure. These structures achieve very high efficiency and power density in their designed architectures, compared to state-of-art solutions. In addition, they can be easily manufactured using automated manufacturing processes.
Mbairi, Felix D. "Some Aspects of Advanced Technologies and Signal Integrity Issues in High Frequency PCBs, with Emphasis on Planar Transmission Lines and RF/Microwave Filters". Doctoral thesis, KTH, Mikroelektronik och tillämpad fysik, MAP, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4324.
Texto completoQC 20100809
Mbairi, Felix Djebe. "Some aspects of advanced technologies and signal integrity issues in high frequency PCBs, with emphasis on planar transmission lines and RF/Microwave filters /". Stockholm : Department of Microelectronics and Applied Physics, Royal Institute of Technology (KTH), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4324.
Texto completoCapellán, Villacián Cándido. "Aportaciones al modelado del transformador en AF". Doctoral thesis, Universidad de Cantabria, 2012. http://hdl.handle.net/10803/81555.
Texto completoModelling is a useful technique able to provide a suitable knowledge about the behaviour of all the devices operated at high frequencies. This thesis approaches this topic to the case of the transformer. A state of the art about high-frequency modelling is summarized and the most relevant research works are analysed. By using a 4 kVA three-phase power transformer, a set-up facility and the associated methodology has been proposed in order to develop a method able to obtain both the low and high-frequency models. The obtained model can be synthesized using passive LCR circuits. The accuracy of the model is then evaluated using the set-up facility. In initial experiments, the classic low-frequency model is put to the test in order know the maximum frequency at which the model can be used. After that, a new high-frequency model is proposed and its response is evaluated and validated with measurements.
Fei, Chao. "Optimization of LLC Resonant Converters: State-trajectory Control and PCB based Magnetics". Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83206.
Texto completoPh. D.
Bakri, Reda. "Modélisation thermique des composants magnétiques planar pour l'électronique de puissance". Thesis, Ecole centrale de Lille, 2018. http://www.theses.fr/2018ECLI0005.
Texto completoThis research aims to provide suitable thermal models for planar magnetics components (PMC). First, high frequency losses (copper and core losses) issues are detailed, which are heat sources in PMC. Then, a state of the art of magnetic component thermal modeling is presented. To meet various needs of designers, two types of thermal models have been developed. A first analytical model, based on thermal resistance that enables to estimate temperature rise in the early design stage, is proposed. Its distinguishing feature is to take into account ambient temperature and loss values, in order to achieve an optimal design of PMC according to operating conditions. To compute 3D temperature distribution inside the component, and detect potential hotspots, a second model based on nodal thermal network (NTN) has been developped. It deals with permanent and transient cases, with different types of boundary conditions. The two models have been validated with numerical simulations and measurements on planar transformers laboratory prototypes
Barbosa, Giancarlos Costa. "Projeto de um Transformador utilizado em uma Planta de Plasma". Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15453.
Texto completoCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
This work discusses the design of a transformer used in a plant plasma. This plant, which is being developed in UFRN, will be used in the treatment of waste. It consists basically of a radio frequency power supply and a inductive plasma torch. The transformer operates at the nominal frequency of 400 kHz, with 50 kW, allowing the adaptation of impedance between the power supply and torch. To develop the project, a study was done on the fabrication technologies and physical effects on the frequency of operation. This was followed by the modeling of this transformer. Finally, simulations and tests were conducted to validate the design
Este trabalho aborda o projeto de um transformador utilizado em uma planta de plasma. Esta planta, que est? sendo desenvolvida na UFRN, ser? utilizada no tratamento de res?duos. Ela ? composta, basicamente, por uma fonte de alimenta??o de radiofrequ?ncia e uma tocha indutiva de plasma. O transformador opera na frequ?ncia nominal de 400 kHz, com pot?ncia de 50 kW, permitindo a adapta??o de imped?ncias entre a fonte de alimenta??o e a tocha. Para o desenvolvimento do projeto, foi feito um estudo sobre as tecnologias de fabrica??o e efeitos f?sicos na frequ?ncia de opera??o. Posteriormente, foi realizada a modelagem deste transformador. Por fim, foram realizados simula??es e testes de forma a validar o projeto
Bacega, Felippe. "Avaliação do estado dos equipamentos do sistema de transporte de energia elétrica através de técnicas de medição de descargas parciais em campo". Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/106/106131/tde-05112014-150019/.
Texto completoThis work presents a new method of measuring partial discharges, through high frequency current transformers, installed in the equipment grounding conductor of the electrical power system and coupled to an oscilloscope. This new measurement method has as great gain, the fact that the equipment doesnt need to be removed from service to perform measurement. Because of the transmission being remunerated by the availability of the transmission functions, diagnosis of equipment in service makes the costs been reduced. A theoretical survey where the characteristic curve expected response from the current transformer to an impulsive signal was set has been done. Characteristic curves were raised in the laboratory through oscillograms in the time domain, of signatures of partial discharges in equipment with SF6 gas and oil isolation, in order to validate expected signal discharges in the theoretical foundation. These signatures were used in field measurements, which proved the feasibility of the theoretical foundation and signatures obtained in the laboratory. Further factors were raised that may influence the measurements and shown signs that have different characteristics from those of partial discharges in order to differentiate them.
Amrhein, Andrew Aloysius. "Induction Heating of Aluminum Cookware". Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/77400.
Texto completoMaster of Science