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1 kW/250 kHz full bridge zero voltage switched phase shift DC-DC converter with improved efficiency, Valtchev, Stanimir, Borges Beatriz V., and Anunciada Victor , INTELEC, International Telecommunications Energy Conference (Proceedings), p.803-807, (1995) Abstract
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1 kW/250 kHz full bridge zero voltage switched phase shift DC-DC converter with improved efficiency, Valtchev, Stanimir, Borges Beatriz V., and Anunciada Victor , INTELEC, International Telecommunications Energy Conference (Proceedings), p.803-807, (1995) Abstract
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400V DC Supply Discussed Once Again, and Unavoidable (more efficient, more reliable, safer), Valtchev, Stanimir , Symposium INTELEC95, Presentation and publication of article, available to authorized industry and academy participants, Zaltbommel, (2015) Abstract
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400V DC Supply Discussed Once Again, and Unavoidable (more efficient, more reliable, safer), , Symposium INTELEC95, Presentation and publication of article, available to authorized industry and academy participants, Zaltbommel, (2015) Abstract
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Accionamento de um Motor Passo a Passo com Velocidade e Direcção Controladas e com Binário de Arranque Aumentado, Sousa, Pedro , February, (2009) Abstract
Os motores passo a passo podem ser vistos como motores eléctricos sem comutação electromecânica (escovas e anéis). Tipicamente, todos os enrolamentos no motor são parte do estator, e o rotor ou é um magneto permanente ou, no caso dos motores de relutância variável, um bloco dentado de algum material ferro-magnético macio. Toda a comutação deve ser lidada externamente pelo controlador do motor, e normalmente, os motores e os controladores são dimensionados de modo que o motor possa ser posicionado numa posição fixa, assim como rodar em ambos os sentidos. Os motores passo a passo podem ser usados em sistemas de controlo em malha aberta; estes são geralmente adequados para sistemas que operam em baixas acelerações com cargas fixas, mas o controlo em malha fechada pode ser essencial para acelerações elevadas, particularmente se envolverem cargas variáveis. Se um motor de passo num sistema de controlo em malha aberta sofre um binário demasiado grande, todo o conhecimento da posição do rotor será perdido e o sistema deverá ser reiniciado. Nesta dissertação, é proposto um novo conversor elétrico em malha aberta, especialmente dimensionado para motores de pequenas dimensões e de alto binário, alimentados com correntes unidirecionais. Este conversor é baseado na mudança do declive de subida da corrente em cada enrolamento, através da descarga de um condensador adicional carregado.
Actions for Broadening the Engineering Culture of the European Student with an Insight to the Future Needs of the Global (European) Labour Market, Valtchev, Stanimir , Proceedings of the International conference of the European Polytechnical University, (2012) Abstract
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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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Actions for Broadening the Engineering Culture of the European Student with an Insight to the Future Needs of the Global (European) Labour Market, Valtchev, Stanimir , First Conference with International Participation {"}Education, Science, Innovations{"}, Pernik, Proceedings of ESIʹ2011, pp. 78-82, (2011) Abstract
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Actions for Broadening the Engineering Culture of the European Student with an Insight to the Future Needs of the Global (European) Labour Market, Valtchev, {Stanimir Stoyanov}, and DEE Group Author , Proceedings of the First International Conference of the European Polytechnical University, 1, p.78–82, (2011) Abstract
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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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Active power filter with common {DC} link for compensation of harmonic distortion in power grids, Habibullin, Maksim, Pikalov Vladimir, Mescheryakov Viktor, and Valtchev Stanimir , 2014 16th International Power Electronics and Motion Control Conference and Exposition, sep, (2014) Abstract
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The Active Power Filter with Relay Current Regulator and a Common DC Link for Compensation of Harmonic Distortion in Power Networks, Valtchev, Stanimir , DOCEIS{'}14 Conference, (2014) Abstract
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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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Active Power Filter with Relay Current Regulator and Common {DC} Link for Compensation of Harmonic Distortion in Power Grids, Habibullin, Maksim Maratovich, Pavlov Igor Sergeevich, Mescheryakov Viktor Nikolaevich, and Valtchev Stanimir , Technological Innovation for Collective Awareness Systems, p.427–434, (2014) Abstract
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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, Beirante, J., Borges Beatriz, and Valtchev Stanimir , Ia Conferencia de Telecomunicações CONFTELE, April, p.471–474, (1997)
Analysis of magnetic properties of steels used in HTS transformers’ cores at cryogenic and room temperature, Gonçalves Pronto, A. , (2009)
Asynchronous electric drive power-hardware-in-the-loop system, Mudrov, Mikhail, Ziuzev Anatoliy, Nesterov Konstantin, and Valtchev Stanimir , Proceedings - 2018 17th International Ural Conference on AC Electric Drives, ACED 2018, 4, Volume 2018-April, United States, p.1–5, (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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A Basic Computer?Aided Course on Dynamic Processes in Mechatronic Systems for Aeronautical Engineers, Volsky, S., Lomonova Elena, Klaassens Ben J., and Valtchev Stanimir , 9th Annual Conference of the European Association for Education in Electrical and Information Engineering (EAEEIE), May, p.293–298, (1998)
A Basic Computer–Aided Course on Dynamic Processes in Mechatronic Systems for Aeronautical Engineers, Valtchev, Stanimir , European Association for Education in Electrical and Information Engineering (EAEEIE) 9th Annual Conference, Lisbon, (1998) Abstract
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Battery chargers and battery management for the future electric vehicles, Valtchev, Stanimir , Cooperation work between S. Valtchev and TU Delft, September, (2009) Abstract

This was a cooperation with Electric Power Processing laboratory of TU Delft. During this stay organized and financed by TU Delft, S.Valtchev supported by teaching some students, PhD students and post-doc associates (in workshops?seminars).