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Centre for Intelligent Robotics 1988-1998 > CRI8898-A Distributed Intelligent Monitoring and Actuation Systems

Valtchev, Stanimir (1980) Power supply for 2 kW / 25 kV CO2 gas laser. Project Report. Ministry of Science and Technology Bulgaria / USSR (limited access). (Unpublished).

Centre of Technology and Systems 2007-2010 > CTS0710-B Industrial/Manufacturing Systems and Energy Efficiency > CTS0710-B1 Energy

Valtchev, Stanimir (2010) Resonant Effects Applied in Power Conversion for Contactless Energy Transfer and Energy Harvesting. [Lecture]. In: Invited Seminar (Lecture) of S. Valtchev, 22-30 August 2010, Tokyo City University, Tokyo, Japan.

Valtchev, Stanimir (2010) Resonant Effects Applied in Power Conversion for Contactless Energy Transfer. [UNSPECIFIED]. In: UNSPECIFIED. (Unpublished).

Bonifácio, Paulo (2010) Seguidor fotovoltaico: uma variação do P&O - Simulação e Prototipagem. Valtchev, Stanimir (supervisor). Masters thesis, FCT-UNL.

Valtchev, Stanimir and Pamies Teixeira, Jorge (2010) The Charging of Hybrid and Electrical Vehicles’ Batteries: Contactless Energy Transfer as the key to the future. [Keynote]. In: 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, 6-11 July 2010, Warsaw, Poland.

Pamies Teixeira, Jorge and Valtchev, Stanimir (2010) An Insight to Potential Actions Facing Future Needs of Electric and Hybrid Electric Vehicles. [Keynote]. In: 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, 6-11 July 2010, Warsaw, Poland.

Valtchev, Stanimir (2010) Resonant power conversion in contactless battery charging for Electric Vehicle / Hybrid Electric Vehicle. [Paper]. In: 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, 6-11 July 2010, Warsaw, Poland.

Valtchev, Stanimir (2009) Battery chargers and battery management for the future electric vehicles. [Speech]. In: Cooperation work between S. Valtchev and TU Delft, 12 July 2009 - 16 September 2009, TU Delft, The Netherlands. (Unpublished).

Valtchev, Stanimir and Miletiev, Rosen and Arnaoudov, Rumen and Valtchev, Svilen (2009) Control strategy for efficient operation of super-resonant SLSR (contactless) converters. [Paper]. In: XLIV INTERNATIONAL SCIENTIFIC CONFERENCE ON INFORMATION, COMMUNICATION AND ENERGY SYSTEMS AND TECHNOLOGIES (before 1990 was: "Day of the Radio Conference"), June, 2009, Veliko Turnovo, Bulgaria. URL: http://www.tu-sofia.bg/ENG/fktt/ICEST-09/icest_200....

Sousa, Pedro (2009) Accionamento de um Motor Passo a Passo com Velocidade e Direcção Controladas e com Binário de Arranque Aumentado. Valtchev, Stanimir and Neves, Mário (supervisors). Masters thesis, FCT-UNL.

Inácio, D and Inácio, J. A. and Pina, J. and Valtchev, S and Neves, M. and Martins, J. and Rodrigues, A. (2009) Conventional and HTS Disc motor with pole variation control. [Paper]. In: 2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 18-20 Mar 2009, Caparica. (ISI Web of Science).

Sousa, P. and Valtchev, Stanimir and Neves, Mário and Rodrigues, A. (2009) A New Open-Loop Control Method for Stepping Motor Driving. [Paper]. In: 2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 18-20 Mar 2009, Caparica. URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb.... (ISI Web of Science).

Valtchev, Stanimir and Borges, Beatriz and Brandisky, Kostadin and Klaassens, J. Ben (2009) Resonant Contactless Energy Transfer With Improved Efficiency. IEEE Transactions on Power Electronics, 24 (3), pp. 685-699. ISSN 0885-8993. URL: http://dx.doi.org/10.1109/TPEL.2008.2003188. (ISI Web of Science, Citations: 16).

Valtchev, Stanimir (2008) Contactless Power Transfer. [Lecture]. In: Seminar of S.Valtchev on Contactless Power Transfer, 28.07.2008 - 3.08.2008, TU Delft, The Netherlands. (Unpublished).

Inácio, Steve (2008) Projecto de uma caixa de velocidades eléctrica por meio da variação do número de pólos para motores em disco de rotor em alumínio e em materiais supercondutores de alta temperatura (SAT). Neves, Mário and Pina, João and Valtchev, Stanimir (supervisors). Masters thesis, FCT-UNL.

Pereira, P and Valtchev, S and Pina, J and Gonçalves, A and Neves, M Ventim and Rodrigues, A L (2008) Power electronics performance in cryogenic environment: evaluation for use in HTS power devices. Journal of Physics: Conference Series, 97, 012219. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012219. (ISI Web of Science, Citations: 1).

Inácio, S and Inácio, D and Pina, J M and Valtchev, Stanimir and Neves, M V and Rodrigues, A L (2008) An electrical gearbox by means of pole variation for induction and superconducting disc motor. Journal of Physics: Conference Series, 97, 012221. ISSN 742-6588. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012221. (ISI Web of Science, Citations: 1).

Pina, J and Pereira, P and Valtchev, S and Gonçalves, A and Neves, M Ventim and Alvarez, A and Rodrigues, L (2008) A test rig for thrust force measurements of an all HTS linear synchronous motor. Journal of Physics: Conference Series, 97, 012220. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012220. (ISI Web of Science, Citations: 5).

Pereira, Pedro and Valtchev, S and Pina, João and Gonçalves, Anabela and Neves, Mário and Rodrigues, Amadeu (2007) Power Electronics Performance in Cryogenic Environment: Evaluation for Use in HTS Power Devices. [Paper]. In: 8th European Conference on Applied Superconductivity (EUCAS), 16-20 September 2007, Brussels, Belgium.

Inácio, S and Inácio, D and Pina, J. and Valtchev, S and Neves, M Ventim and Rodrigues, A. (2007) An Electrical Gearbox by means of pole variation for induction and superconducting disc motor. [Paper]. In: 8th European Conference on Applied Superconductivity (EUCAS), 16-20 September 2007, Brussels, Belgium.

Pina, João and Caracaleanu, C. and Gonçalves, A. and Pereira, Pedro and Valtchev, S and Neves, Mário and Rodrigues, A. (2007) High Performance, Environment Friendly, Modular and Fault Tolerant Renewable Energy Microgrid. [Paper]. In: 12th International Energy Conference & Exhibition (ENERGEX2007), 26-30 Nov 2007, Singapore.

Steve, Inácio and Pina, João and Valtchev, Stanimir and Neves, Mário and Rodrigues, Amadeu (2007) Topology of an Electrical Gearbox with Variable Poles for Induction and Superconducting Disc Motors. [Other]. In: X Portuguese-Spanish Congress in Electrical Engineering, 05th -07th July 2007, Madeira.

Pina, João and Pereira, Pedro and Valtchev, S and Gonçalves, A. and Neves, Mário and Rodrigues, A. (2007) A test rig for thrust force measurements f an all HTS linear synchronous motor. [Paper]. In: 8th European Conference on Applied Superconductivity (EUCAS), 16-20 September 2007, Brussels, Belgium.

Departamento de Engenharia Electrotécnica 2010 > DEE2010-B Energia e Sistemas > DEE2010-B1 Energia

Valtchev, Stanimir (2010) Resonant Effects Applied in Power Conversion for Contactless Energy Transfer and Energy Harvesting. [Lecture]. In: Invited Seminar (Lecture) of S. Valtchev, 22-30 August 2010, Tokyo City University, Tokyo, Japan.

Valtchev, Stanimir (2010) Resonant Effects Applied in Power Conversion for Contactless Energy Transfer. [UNSPECIFIED]. In: UNSPECIFIED. (Unpublished).

Bonifácio, Paulo (2010) Seguidor fotovoltaico: uma variação do P&O - Simulação e Prototipagem. Valtchev, Stanimir (supervisor). Masters thesis, FCT-UNL.

Valtchev, Stanimir and Pamies Teixeira, Jorge (2010) The Charging of Hybrid and Electrical Vehicles’ Batteries: Contactless Energy Transfer as the key to the future. [Keynote]. In: 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, 6-11 July 2010, Warsaw, Poland.

Pamies Teixeira, Jorge and Valtchev, Stanimir (2010) An Insight to Potential Actions Facing Future Needs of Electric and Hybrid Electric Vehicles. [Keynote]. In: 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, 6-11 July 2010, Warsaw, Poland.

Valtchev, Stanimir (2010) Resonant power conversion in contactless battery charging for Electric Vehicle / Hybrid Electric Vehicle. [Paper]. In: 2010 International Symposium on Electric Vehicle and 2-nd Annual Conference of Polish Society for Environment Friendly Vehicles, 6-11 July 2010, Warsaw, Poland.

Departamento de Engenharia Electrotécnica 2010 > DEE2010-C Engenharia de Computadores > DEE2010-C2 Robótica e Manufactura Integrada por Computador

Valtchev, Stanimir and Valtchev, Svilen (2010) Improved strategy for an instantaneous super-resonant converter regulation. [Paper]. In: 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), 20-22 May 2010, Brasov, Romania. URL: http://dx.doi.org/10.1109/OPTIM.2010.5510484. (ISI Web of Science, Citations: 1).

Departamento de Engenharia Electrotécnica > Electrotecnia e Máquinas Eléctricas

Valtchev, Stanimir (2009) Battery chargers and battery management for the future electric vehicles. [Speech]. In: Cooperation work between S. Valtchev and TU Delft, 12 July 2009 - 16 September 2009, TU Delft, The Netherlands. (Unpublished).

Valtchev, Stanimir and Miletiev, Rosen and Arnaoudov, Rumen and Valtchev, Svilen (2009) Control strategy for efficient operation of super-resonant SLSR (contactless) converters. [Paper]. In: XLIV INTERNATIONAL SCIENTIFIC CONFERENCE ON INFORMATION, COMMUNICATION AND ENERGY SYSTEMS AND TECHNOLOGIES (before 1990 was: "Day of the Radio Conference"), June, 2009, Veliko Turnovo, Bulgaria. URL: http://www.tu-sofia.bg/ENG/fktt/ICEST-09/icest_200....

Sousa, Pedro (2009) Accionamento de um Motor Passo a Passo com Velocidade e Direcção Controladas e com Binário de Arranque Aumentado. Valtchev, Stanimir and Neves, Mário (supervisors). Masters thesis, FCT-UNL.

Inácio, D and Inácio, J. A. and Pina, J. and Valtchev, S and Neves, M. and Martins, J. and Rodrigues, A. (2009) Conventional and HTS Disc motor with pole variation control. [Paper]. In: 2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 18-20 Mar 2009, Caparica. (ISI Web of Science).

Sousa, P. and Valtchev, Stanimir and Neves, Mário and Rodrigues, A. (2009) A New Open-Loop Control Method for Stepping Motor Driving. [Paper]. In: 2nd International Conference on Power Engineering, Energy and Electrical Drives (POWERENG'2009), 18-20 Mar 2009, Caparica. URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb.... (ISI Web of Science).

Valtchev, Stanimir and Borges, Beatriz and Brandisky, Kostadin and Klaassens, J. Ben (2009) Resonant Contactless Energy Transfer With Improved Efficiency. IEEE Transactions on Power Electronics, 24 (3), pp. 685-699. ISSN 0885-8993. URL: http://dx.doi.org/10.1109/TPEL.2008.2003188. (ISI Web of Science, Citations: 16).

Valtchev, Stanimir (2008) Contactless Power Transfer. [Lecture]. In: Seminar of S.Valtchev on Contactless Power Transfer, 28.07.2008 - 3.08.2008, TU Delft, The Netherlands. (Unpublished).

Inácio, Steve (2008) Projecto de uma caixa de velocidades eléctrica por meio da variação do número de pólos para motores em disco de rotor em alumínio e em materiais supercondutores de alta temperatura (SAT). Neves, Mário and Pina, João and Valtchev, Stanimir (supervisors). Masters thesis, FCT-UNL.

Valtchev, Stanimir (2008) Series Resonant Power Converter for Contactless Energy Transfer with Improved Efficiency. Borges, Beatriz and Klaassens, J. Ben (supervisors). PhD thesis, UTL-IST (Portugal), TU Delft (the Netherlands). URL: http://resolver.tudelft.nl/uuid:10c8de50-d48a-416b....

Pereira, P and Valtchev, S and Pina, J and Gonçalves, A and Neves, M Ventim and Rodrigues, A L (2008) Power electronics performance in cryogenic environment: evaluation for use in HTS power devices. Journal of Physics: Conference Series, 97, 012219. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012219. (ISI Web of Science, Citations: 1).

Inácio, S and Inácio, D and Pina, J M and Valtchev, Stanimir and Neves, M V and Rodrigues, A L (2008) An electrical gearbox by means of pole variation for induction and superconducting disc motor. Journal of Physics: Conference Series, 97, 012221. ISSN 742-6588. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012221. (ISI Web of Science, Citations: 1).

Pina, J and Pereira, P and Valtchev, S and Gonçalves, A and Neves, M Ventim and Alvarez, A and Rodrigues, L (2008) A test rig for thrust force measurements of an all HTS linear synchronous motor. Journal of Physics: Conference Series, 97, 012220. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012220. (ISI Web of Science, Citations: 5).

Pereira, Pedro and Valtchev, S and Pina, João and Gonçalves, Anabela and Neves, Mário and Rodrigues, Amadeu (2007) Power Electronics Performance in Cryogenic Environment: Evaluation for Use in HTS Power Devices. [Paper]. In: 8th European Conference on Applied Superconductivity (EUCAS), 16-20 September 2007, Brussels, Belgium.

Inácio, S and Inácio, D and Pina, J. and Valtchev, S and Neves, M Ventim and Rodrigues, A. (2007) An Electrical Gearbox by means of pole variation for induction and superconducting disc motor. [Paper]. In: 8th European Conference on Applied Superconductivity (EUCAS), 16-20 September 2007, Brussels, Belgium.

Pina, João and Caracaleanu, C. and Gonçalves, A. and Pereira, Pedro and Valtchev, S and Neves, Mário and Rodrigues, A. (2007) High Performance, Environment Friendly, Modular and Fault Tolerant Renewable Energy Microgrid. [Paper]. In: 12th International Energy Conference & Exhibition (ENERGEX2007), 26-30 Nov 2007, Singapore.

Steve, Inácio and Pina, João and Valtchev, Stanimir and Neves, Mário and Rodrigues, Amadeu (2007) Topology of an Electrical Gearbox with Variable Poles for Induction and Superconducting Disc Motors. [Other]. In: X Portuguese-Spanish Congress in Electrical Engineering, 05th -07th July 2007, Madeira.

Pina, João and Pereira, Pedro and Valtchev, S and Gonçalves, A. and Neves, Mário and Rodrigues, A. (2007) A test rig for thrust force measurements f an all HTS linear synchronous motor. [Paper]. In: 8th European Conference on Applied Superconductivity (EUCAS), 16-20 September 2007, Brussels, Belgium.

Valtchev, Stanimir and Brandisky, Kostadin and Borges, Beatriz and Klaassens, J. Ben (2005) Efficient Resonant Inductive Coupling Energy Transfer Using New Magnetic and Design Criteria. [Paper]. In: IEEE 36th Power Electronics Specialists Conference, PESC '05, June 2005, Recife, Brasil. URL: http://dx.doi.org/10.1109/PESC.2005.1581796. (ISI Web of Science).

Valtchev, Stanimir and Brandisky, Kostadin and Borges, Beatriz and Klaassens, J. Ben (2005) Magnetic and Design Criteria for Inductive Coupling Energy Transfer. [Paper]. In: 5th Conference on Telecommunications CONFTELE, 2005, Tomar, Portugal. (ISI Web of Science).

Valtchev, Stanimir and Borges, Beatriz and Klaassens, J. Ben (2002) Contactless Energy Transmission with Optimal Efficiency. [Paper]. In: IEEE 28th Annual Conference of the Industrial Electronics Society IECON 02, 5-8 Nov. 2002, Sevilla, Spain. URL: http://www.ieeexplore.ieee.org/stamp/stamp.jsp?tp=.... (ISI Web of Science).

Valtchev, Stanimir and Borges, Beatriz and Klaassens, J. Ben (2001) Series Resonant Converter Applied to Contactless Energy Transmission. [Paper]. In: 3rd Conference on Telecommunications CONFTELE, April 2001, Figueira da Foz, Portugal.

Volsky, S. and Lomonova, Elena and Klaassens, J. Ben and Valtchev, Stanimir (1998) A Basic Computer–Aided Course on Dynamic Processes in Mechatronic Systems for Aeronautical Engineers. [Paper]. In: 9th Annual Conference of the European Association for Education in Electrical and Information Engineering (EAEEIE), May 1998, Lisbon, Portugal.

vanWesenbeeck, MPN and Klaassens, JB and vonStockhausen, U and Anciola, AMD and Valtchev, SS (1997) A multiple-switch high-voltage DC-DC converter. IEEE Transactions on Industrial Electronics, IE-44 (6), pp. 780-787. ISSN 0278-0046. URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arn.... (ISI Web of Science, Citations: 5).

Beirante, J. and Borges, Beatriz and Valtchev, Stanimir (1997) 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. [Paper]. In: Ia Conferencia de Telecomunicações CONFTELE, Abril, 1997, Aveiro, Portugal.

Beirante, J. and Borges, Beatriz and Valtchev, Stanimir (1997) Design Improvement and Experimental Characterization of the Full Bridge, Faze Shift, Zero Voltage Switched DC/DC Converter with Secondary Clamped Inductor. [Paper]. In: European Power Electronics Conference EPE´97, 1997, Trondheim, Norway.

Valtchev, Stanimir (1997) IEEE Meritorious Paper Award for 1996. [Award].

Valtchev, Stanimir and Borges, Beatriz (1995) Improved Full–Bridge Zero–Voltage–Switched Phase–Shift DC–DC Converter Using a Secondary–Clamped Inductor. [Paper]. In: Proceedings of the 1995 IEEE Industrial Electronics, Control, and Instrumentation IECON 21st International Conference, 06 Nov 1995-10 Nov 1995, Orlando, FL (USA). URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arn....

Valtchev, Stanimir and Klaassens, J. Ben and van Wesenbeeck, Marinus (1995) Super–Resonant Converter with Switched Resonant Inductor with PFM–PWM Control,. IEEE Transactions on Power Electronics, 10 (6), pp. 760-765. ISSN 0885-8993. URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arn....

Valtchev, S and Borges, BV and Anunciada, V (1995) LkW/250 kHz full bridge zero voltage switched phase shift DC-DC converter with improved efficiency. [Paper]. In: 17th International Telecommunications Energy Conference, INTELEC '95, 29 Oct 1995-01 Nov 1995, The Hague, the Netherlands. URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb....

vanWesenbeeck, MPN and Klaassens, JB and vonStockhausen, U and Ancíola, AMD and Valtchev, SS (1995) A multiple-switch high-voltage DC-DC converter. [Paper]. In: 17th Telecommunications Energy Conference, INTELEC '95, 29 Oct 1995-01 Nov 1995, The Hague, the Netherlands. URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb.... (ISI Web of Science).

Valtchev, Stanimir (1995) Super-resonant power converter operation in soft-switching mode. [Lecture]. In: Seminar of S.Valtchev on the new PhD thesis chapter, TU Sofia, Bulgaria. (Unpublished).

Valtchev, Stanimir (1992) High Efficiency Resonant Power Conversion. [Lecture]. In: High Efficiency Resonant Power Conversion, 24-04-1992, Lisbon, Instituto Superior Tecnico. URL: http://pessoa.fct.unl.pt/ssv/Seminar_Valtchev.pdf.

Valtchev, Stanimir (1990) Some Regulation Characteristics of Pulse–Width Modulated Series Resonant Power Conversion. [Paper]. In: 6th Conference on Power Electronics and Motion Control PEMC'90, 1–3 Oct. 1990, Budapest, Hungary.

Valtchev, Stanimir and Klaassens, J. Ben (1990) Efficient Resonant Power Conversion. IEEE Transactions on Industrial Electronics, 37 (6), pp. 490-495. ISSN 0278-0046. URL: http://dx.doi.org/10.1109/41.103453. (ISI Web of Science, Citations: 8).

Valtchev, Stanimir and Klaassens, J. Ben (1990) High Efficiency Resonant Power Conversion. [Paper]. In: 1st USSR Conference (with international participation) of Power Electronics Systems and Low–Power Converters Equipment (SES i UMPT), Sept. 1990, Alma Ata Kazakhstan (USSR).

Tatzov, Alexander and Dimitrov, D. and Borisov, T. and Botchev, R. and Pashov, P. and Petrov, P. and Petrov, D. and Valtchev, Stanimir (1989) Equipment for Measuring the Road–Tyre Cohesion. [Paper]. In: 6th National Congress of Mechanics, 25-30 Sept. 1989, Varna, Bulgaria.

Valtchev, Stanimir (1989) Some Properties of the Transistor Series Resonant Power Convertors. [Paper]. In: The Day of the Radio Conference, 5–6 May 1989, Sofia, Bulgaria.

Valtchev, Stanimir and Krustev, Georgi (1988) Behavior of the Series Resonant Energy Converter at Frequencies Differing from the Resonant One. [Paper]. In: The Day of the Radio Conference, 6–7 May 1988, Sofia, Bulgaria.

Valtchev, Stanimir and Krustev, Georgi (1988) Experimental Results of the MOS Transistor Series Resonant Energy Converter Exploration. [Paper]. In: The Day of the Radio Conference, 6–7 May 1988, Sofia.

Valtchev, Stanimir and Krustev, Georgi and Popov, Evgeni (1986) Power Transistor Pulse Generator for Technological Purposes. [Paper]. In: Jubileum Scientific Session of VMEI–Gabrovo, Power Electronics Section, 7–8 Oct. 1986, Gabrovo, Bulgaria.

Vasilev, Vasil and Batchev, Vihren and Milev, Mihail and Valtchev, Stanimir and Tatzov, Alexander (1986) An Electronic System for Rowers' Propulsion Motion Activities Studies. Problems of the Physical Culture and Sport (now: "Sport and Science Magazine") (2), pp. 13-17. ISSN 1310-3393. URL: http://www.scienceandsport.com/index.php.

Vasilev, Vasil and Valtchev, Stanimir (1984) PWM Servosystem for DC Motors Control. [Paper]. In: Scientific and Technological Conference "Industrial Robots’84", 15–16 June 1984, Stara Zagora, Bulgaria.

Natchev, Branimir and Valtchev, Stanimir (1983) Control System for Power Converter of DC to Sinusoidal AC Voltage. [Paper]. In: National Conference (with international participation) of Power Electronics SILEKTRON’83, 28–29 Oct. 1983, Sofia, Bulgaria.

Natchev, Branimir and Valtchev, Stanimir (1983) Driver Circuit for Power Transistor Switches. [Paper]. In: National Conference (with international participation) of Power Electronics SILEKTRON’83, 28–29 Oct. 1983, Sofia, Bulgaria.

Vasilev, Vasil and Natchev, Branimir and Valtchev, Stanimir (1983) Power Converter of DC to Sinusoidal AC Voltage for Robotic Purposes. [Paper]. In: Scientific Session VMEI’83, Section Robotics, 12–14 Oct.1983, Sofia, Bulgaria.

Valtchev, Stanimir (1980) Power supply for 2 kW / 25 kV CO2 gas laser. Project Report. Ministry of Science and Technology Bulgaria / USSR (limited access). (Unpublished).

Atanasov, Alexander and Valtchev, Ivan and Kolevska, Dobrinka and Valtchev, Stanimir (1978) Experimental Research of the Boron Nitride Diffusion. Elektropromishlenost i Priborostroene (now: Elektrotechnica & Elektronica) (1), pp. 31-35. ISSN ISSN 0861-4717.

Valtchev, Stanimir (1974) Eng. Stanimir Valtchev, Top MSc Graduate of the year 1974, Award and Engraved Wrist-Watch. [Award]. URL: http://www.tu-sofia.bg/ENG/index.html.