Publications

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Beirante, J., B. Borges, and S. Valtchev, "Análise Teórica, Simulação, Optimização e Caracterização Experimental do Conversor CC?CC em Ponte Completa, com Modulação de Fase, Comutação no Zero da Tensão e Bobina de Coeficiente de Auto?indução Variável", Ia Conferencia de Telecomunicações CONFTELE, pp. 471–474, April, 1997.
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Gonçalves Pronto, A., Analysis of magnetic properties of steels used in HTS transformers’ cores at cryogenic and room temperature, , 2009.
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Habibullin, M. M., I. S. Pavlov, V. N. Mescheryakov, and S. Valtchev, "Active Power Filter with Relay Current Regulator and Common {DC} Link for Compensation of Harmonic Distortion in Power Grids", Technological Innovation for Collective Awareness Systems: Springer Science $\mathplus$ Business Media, pp. 427–434, 2014. Abstract
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Habibullin, M., V. Pikalov, V. Mescheryakov, and S. Valtchev, "Active power filter with common {DC} link for compensation of harmonic distortion in power grids", 2014 16th International Power Electronics and Motion Control Conference and Exposition: Institute of Electrical {&} Electronics Engineers ({IEEE}), sep, 2014. Abstract
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Mudrov, M., A. Ziuzev, K. Nesterov, and S. Valtchev, "Asynchronous electric drive power-hardware-in-the-loop system", Proceedings - 2018 17th International Ural Conference on AC Electric Drives, ACED 2018, vol. 2018-April, United States, Institute of Electrical and Electronics Engineers Inc., pp. 1–5, 4, 2018. Abstract

Power Hardware-in-the-Loop (PHiL) system for asynchronous electric drives application based on power inverter with Field Programmable Gate Array (FPGA)-based control system is discussed. Proposed PHiL structure and scheme for asynchronous electric drives are under discussion as well. Described PHiL can be used for power inverters multi-stage testing.

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Valtchev, S., "Actions for Broadening the Engineering Culture of the European Student with an Insight to the Future Needs of the Global (European) Labour Market", First Conference with International Participation {"}Education, Science, Innovations{"}, Pernik, Proceedings of ESIʹ2011, pp. 78-82, 2011. Abstract
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Valtchev, S., "The Active Power Filter with Relay Current Regulator and a Common DC Link for Compensation of Harmonic Distortion in Power Networks", DOCEIS{'}14 Conference, 2014. Abstract
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Valtchev, {S. S. }, and DEE Group Author, "Actions for Broadening the Engineering Culture of the European Student with an Insight to the Future Needs of the Global (European) Labour Market", Proceedings of the First International Conference of the European Polytechnical University, pp. 78–82, 1, 2011. Abstract
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Valtchev, S., "Actions for Broadening the Engineering Culture of the European Student with an Insight to the Future Needs of the Global (European) Labour Market", Proceedings of the International conference of the European Polytechnical University, 2012. Abstract
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