Publications

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Conference Paper
Valtchev, S., and J. P. Teixeira, "The Charging of Hybrid and Electrical Vehicles? Batteries: Contactless Energy Transfer as the key to the future", 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, July, 2010. Abstract
Would it be necessary to charge rapidly the electric vehicle (EV) and hybrid electric vehicle (HEV)? It is not easy to answer without a thorough look at the capability of the modern propulsion battery and the power necessities of the EV and HEV. The different possible solutions are compared and maximum speed of charging is analysed. The wired connection for charging is compared to the wireless energy transfer and because of the limitations imposed by the modern and future batteries, the contactless energy transfer is chosen as the future charging method.
Valtchev, S., J. Almeida, J. P. Teixeira, and B. J. Klaassens, "Conversion of wind-induced vibrations into electricity", 2014 {IEEE} 36th International Telecommunications Energy Conference ({INTELEC}): Institute of Electrical {&} Electronics Engineers ({IEEE}), sep, 2014. Abstract
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Tatzov, A., D. Dimitrov, T. Borisov, R. Botchev, P. Pashov, P. Petrov, D. Petrov, and S. Valtchev, "Equipment for Measuring the Road?Tyre Cohesion", 6th National Congress of Mechanics, September, 1989.
Teixeira, J. P., and S. Valtchev, "An Insight to Potential Actions Facing Future Needs of Electric and Hybrid Electric Vehicles", 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, July, 2010. Abstract
Recent issues of global heating and energy shortages are imposing a need to change our paradigm around transportation. Somehow, electric vehicles are progressively standing as a strong and necessary alternative for the society. Technically and technologically the acceptance of the EV is easier now than ever but the psychology of the consumers and the running business of internal combustion vehicles, the whole existing infrastructure are too much conservative to be changed easily. The changes in technology require changes in the engineering society and its human resources. The objective of this paper is to give a contribution to the discussion and reflection of potential future scenarios where EV?HEV?s are spread across the society. It gives an overview of the range of knowledge and competences necessary for a sustainable and streamlined development of those. In fact, it is expected that a new kind of professional profiles need to be created or developed to supply the work market with the right human resources. The paper provides some discussion on the creation of new profiles or adaption of existing ones. Among different possible scenarios the creation of post-graduation courses for students holding undergraduate profiles in the fields referred to earlier would be an interesting and viable solution for fast response. The post graduation would be focused in specific key areas of the EV?HEV. Several factors are pointed out to endorse this scenario
Journal Article
Vasilev, V., V. Batchev, M. Milev, S. Valtchev, and A. Tatzov, "An Electronic System for Rowers' Propulsion Motion Activities Studies", Problems of the Physical Culture and Sport (now: "Sport and Science Magazine"), no. 2, pp. 13–17, February, 1986. https://scholar.google.com/citations?user=5-Rq1wYAAAAJ&hl=en
Cavalheiro, D., A. C. Silva, S. Valtchev, J. P. Teixeira, and V. Vassilenko, "Energy harvested from respiratory effort", BIODEVICES 2012 - Proceedings of the International Conference on Biomedical Electronics and Devices, pp. 388-392, 2012. Abstract
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Cavalheiro, D., A. C. Silva, S. Valtchev, J. P. Teixeira, and V. Vassilenko, "Energy harvested from respiratory effort", BIODEVICES 2012 - Proceedings of the International Conference on Biomedical Electronics and Devices, pp. 388-392, 2012. Abstract
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Todorov, G., T. Todorov, I. Ivanov, S. Valtchev, and B. Klaassens, "Tuning techniques for kinetic MEMS energy harvesters", INTELEC, International Telecommunications Energy Conference (Proceedings), 2011. Abstract
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