Forskningsområden

Kraftelektronik
Inbyggda system

Pågående forskning

Högfrekventa kW omvandlare
Kraft på flexibla substrat
Fiberinstallationsutrustning

Undervisning

Kraftelektronik, ET027G

Publikationer

Artiklar i tidskrifter
Doktorsavhandlingar
Konferensbidrag
Patent

Artiklar i tidskrifter

Saleem, J. , Majid, A. , Malik, A. W. , Bertilsson, K. & Carlberg, T. (2016). An efficient method of spot welding Aluminium alloys with induction preheating. Journal of Electrical Systems, vol. 12: 4, ss. 817-825.  

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2013). High Speed (MHz) Series Resonant Converter (SRC) Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer. IEEE transactions on power electronics, vol. 28: 3, ss. 1253-1264.  

Saleem, J. , Majid, A. , Bertilsson, K. & Carlberg, T. (2013). 3 Dimensional Finite Element Simulation of Seam Welding Process. Elektronika Ir Elektrotechnika, vol. 19: 8, ss. 73-78.  

Majid, A. , Saleem, J. , Alam, F. & Bertilsson, K. (2013). EMI Suppression in High Frequency Half Bridge Converter. Elektronika ir Elektrotechnika, vol. 19: 9, ss. 75-80.    

Bertilsson, K. (2012). Nästa generations kompakta spänningsomvandlare. Thule, Kungl. Skytteanska Samfundets Årsbok 2012, vol. 1: 1, ss. 153-157.

Saleem, J. , Majid, A. , Bertilsson, K. , Carlberg, T. & Nazar Ul Islam, M. (2012). Nugget Formation During Resistance Spot Welding Using Finite Element Model. World Academy of Science, Engineering and Technology, vol. 67  

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2009). Fabrication and characterization of a design optimized SU-8 thermopile with enhanced sensitivity. Measurement science and technology, vol. 20: 11, ss. 115202  

Mattsson, C. , Bertilsson, K. , Thungström, G. , Nilsson, H. & Martin, H. (2009). Thermal simulation and design optimization of a thermopile infrared detector with SU-8 membrane. Journal of Micromechanics and Microengineering, vol. 19: 5, ss. 055016  

Andersson, H. , Bertilsson, K. , Thungström, G. & Nilsson, H. (2008). Processing and Characterization of a MOS Type Tetra Lateral Position Sensitive Detector with Indium Tin Oxide Gate Contact. IEEE Sensors Journal, vol. 8: 9-10, ss. 1704-1709.  

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2008). Design of a Micromachined Thermopile Infrared Sensor with a Self-Supported SiO2/SU-8 Membrane. IEEE Sensors Journal, vol. 8: 12, ss. 2044-2052.  

Intarasiri, S. , Hallén, A. , Lu, J. , Jensen, J. , Yu, L. , Bertilsson, K. , Wolborski, M. , Singkarat, S. & et al. (2006). Crystalline quality of 3C-SiC formed by high-fluence C+-implanted Si. Applied Surface Science, vol. 253: 11, ss. 4836-4842.  

Bertilsson, K. , Harris, C. & Nilsson, H. (2004). Calculation of lattice heating in SiC RF power devices. Solid-State Electronics, vol. 48: 12, ss. 1721-1725.  

Bertilsson, K. & Nilsson, H. (2004). The power of using automatic device optimization, based on iterative device simulation, in design of high-performance devices. Solid-State Electronics, vol. 48: 10-11, ss. 1721-1725.  

Mattsson, C. , Bertilsson, K. , Thungström, G. & Nilsson, H. (2004). Manufacturing and characterization of a modified four-quadrant position sensitive detector for out-door applications. Nuclear Instruments and Methods in Physics Research Section A, vol. 531: 1-2, ss. 134-139.  

Nilsson, H. , Dubaric, E. , Hjelm, M. & Bertilsson, K. (2002). Simulation of photon and charge transport in X-ray imaging semiconductor sensors. Nuclear Instruments and Methods in Physics Research Section A, vol. 487: 1-2, ss. 151-162.  

Nilsson, H. , Bertilsson, K. , Hjelm, M. & Dubaric, E. (2002). Numerical Simulation of Field Effect Transistors in 4H- and 6H-SiC. Journal of Wide Bandgap Materials, vol. 9: 4, ss. 293-305.  

Bertilsson, K. & Nilsson, H. (2002). Optimization of 2H, 4H and 6H-SiC high-speed vertical MESFETs. Diamond and related materials, vol. 11: 3-6, ss. 1254-1257.  

Bertilsson, K. & Nilsson, H. (2002). Optimization of 2H, 4H and 6H-SiC MESFETs for High Frequency Applications. Physica Scripta, vol. 101, ss. 75-77.  

Dubaric, E. , Bertilsson, K. & Nilsson, H. (2002). Simulations of Submicron MOSFETs in 2H, 4H and 6H-SiC. Physica Scripta, vol. 101, ss. 14-17.  

Bertilsson, K. , Dubaric, E. , Nilsson, H. , Hjelm, M. & Petersson, S. (2001). Monte Carlo simulation of vertical MESFETs in 2H, 4H and 6H-SiC. Diamond and related materials, vol. 10: 3-7, ss. 1283-1286.  

Bertilsson, K. , Nilsson, H. , Hjelm, M. , Petersson, S. , Käckell, P. & Persson, C. (2001). The Effect of Different Transport Models in Simulation of High Frequency 4H-SiC and 6H-SiC Vertical MESFETs. Solid-State Electronics, vol. 45: 5, ss. 645-653.  

Hjelm, M. , Bertilsson, K. & Nilsson, H. (2001). Full Band Monte Carlo Study of Bulk and Surface Transport Properties in 4H and 6H-SiC. Applied Surface Science, vol. 184: 1-4, ss. 194-198.  

Bertilsson, K. , Dubaric, E. , Thungström, G. , Nilsson, H. & Petersson, S. (2001). Simulation of a low atmospheric-noise modified four-quadrant position sensitive detector. Nuclear Instruments and Methods in Physics Research Section A, vol. 466: 1, ss. 183-187.  

Doktorsavhandlingar

Bertilsson, K. (2004). Simulation and Optimization of SiC Field Effect Transistors. Diss. Stockholm : KTH, 2004

Konferensbidrag

Bakar, M. A. , Bertilsson, K. & Ambatipudi, R. (2016). High frequency (MHz) soft switched flyback dc-dc converter using GaN switches and six-layered PCB transformer. I IET Conference Publications. UK : . S. 1--6.  

Bakar, M. A. , Alam, F. M. & Bertilsson, K. (2016). A phase shifted full bridge converter with novel control over the leakage inductance. I 2016 18TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'16 ECCE EUROPE). (European Conference on Power Electronics and Applications)  

Bakar, M. A. & Bertilsson, K. (2016). An improved modelling and construction of power transformer for controlled leakage inductance. I Environment and Electrical Engineering (EEEIC), 2016 IEEE 16th International Conference on.  

Majid, A. , Saleem, J. , Alam, F. & Bertilsson, K. (2013). Analysis of radiated EMI for power converters switching in MHz frequency range. I Proceedings - 2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, SDEMPED 2013.. S. 428--432.  

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2013). A 45W LLC resonant Converter in MHz Frequency Region for Laptop Adapter Application using GaN HEMTs. I PCIM Europe Conference Proceedings. Berlin : . S. 1029--1035.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2013). High Performance Planar Power Transformer with High Power Density in MHz Frequency Region for Next Generation Switch Mode Power Supplies. I 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference And Exposition (APEC 2013). (Annual IEEE Applied Power Electronics Conference and Exposition (APEC)). S. 2139--2143.  

Kotte, H. B. , Ambatipudi, R. , Haller, S. & Bertilsson, K. (2012). A ZVS Half Bridge DC-DC Converter in MHz Frequency Region using Novel Hybrid Power Transformer. I Proceedings of International Exhibition and Conference for Power Electronics, Intelligent Motion, Power Quality (PCIM) 2012, 8-10 May 2012, Nuremberg, Germany.. Berlin : . S. 399--406.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2012). Effect of Air Gap on the Performance of Hybrid Planar Power Transformer in High Frequency (MHz) Switch Mode Power Supplies (SMPS). I Proceedings of INDUCTICA 2012, Coil Winding, Insulation and Electrical Manufacturing International Conference and Exhibition (CWIEME), Berlin, Germany 26-28 June 2012.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2012). Effect of Dielectric Material on the Performance of Planar Power Transformers in MHz Frequency Region. I Proceedings of INDUCTICA 2012, Coil Winding, Insulation and Electrical Manufacturing International Conference and Exhibition (CWIEME), Berlin, Germany 26-28 June 2012.

Majid, A. , Saleem, J. , Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2012). Design and implementation of EMI filter for high frequency (MHz) power converters. I IEEE International Symposium on Electromagnetic Compatibility.. S. Art. no. 6396738-    

Majid, A. , Saleem, J. & Bertilsson, K. (2012). EMI filter design for high frequency power converters. I 2012 11th International Conference on Environment and Electrical Engineering, EEEIC 2012 : Conference Proceedings.. S. 586--589.  

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2011). Comparison of Two Layered and Three Layered Coreless Printed Circuit Board Step-Down Power Transformers. I 2011 INTERNATIONAL CONFERENCE ON INSTRUMENTATION, MEASUREMENT, CIRCUITS AND SYSTEMS (ICIMCS 2011), VOL 2: FUTURE COMMUNICATION AND NETWORKING. Shenzhen : . S. 59--62.

Saleem, J. , Majid, A. , Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2011). High Frequency Full Bridge Converter using Multilayer Coreless Printed Circuit Board Step-up Power Transformer. I 2011 20th European Conference on Circuit Theory and Design, ECCTD 2011.. S. 805--808.  

Saleem, J. , Majid, A. , Bertilsson, K. & Schüberg, L. (2011). Study the influence of the alignment and  nearby metallic objects on the Hall sensor system for current measurement in Resistance Spot Welding Machine. I 2011 10th International Conference on Environment and Electrical Engineering, EEEIC.EU 2011 - Conference Proceedings.. S. Art. no. 5874717-  

Saleem, J. , Majid, A. , Haller, S. & Bertilsson, K. (2011). A study of IGBT rupture phenomenon in medium frequency resistance welding machine. I Electrical Machines and Power Electronics and 2011 Electromotion Joint Conference (ACEMP), 2011 International Aegean Conference on.. S. 236--239.  

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2011). High Speed Series Resonant Converter (SRC) Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer. I Proceedings of 33rd International Telecommunications Energy Conference (INTELEC 2011). Amsterdam : . S. Art. no. 6099785-  

Majid, A. , Saleem, J. , Kotte, H. B. , Ambatipudi, R. , Haller, S. & Bertilsson, K. (2011). Analysis of feedback in converter using coreless printed circuit board transformer. I Electrical Machines and Power Electronics and 2011 Electromotion Joint Conference (ACEMP), 2011 International Aegean Conference on.. S. 601--604.  

Majid, A. , Kotte, H. B. , Saleem, J. , Ambatipudi, R. , Haller, S. & Bertilsson, K. (2011). High Frequency Half-Bridge Converter using Multilayered Coreless PrintedCircuit Board Step-Down Power Transformer. I 8th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2011-ECCE Asia.. S. 1177--1181.  

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2011). High Speed Cascode Flyback Converter Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer. I Proceedings of 8th International Conference on Power Electronics-ECCE Asia.. S. 1856--1862.  

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2011). Radiated Emissions of Multilayered Coreless Printed Circuit Board Step-Down Power Transformers in Switch Mode Power Supplies. I 8th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2011-ECCE Asia 2011.. S. 960--965.  

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2010). Comparative Results of GaN and Si MOSFET in a ZVS Flyback Converter using Multilayered Coreless Printed Circuit Board Step-Down Transformer. I Proceedings of 2010 3rd International Conference on Power Electronics and Intelligent Transportation System. Shenzhen : . S. 318--321.

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2010). A ZVS Flyback DC-DC Converter using Multilayered Coreless Printed Circuit Board (PCB) Step Down Power Transformer. I World Academy of Science, Engineering and technology. Paris : (World Academy of Science ,Engineering and Technology,ISSUE 70,OCTOBER 2010). S. 148--155.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2010). Coreless Printed Circuit Board (PCB) StepdownTransformers for DC-DC ConverterApplications. I PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY, ISSUE 70, OCTOBER 2010, ISSN:1307-6892. France : (WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY). S. 380--389.

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2008). Fabrication and evaluation of a thermal sensor formed on a thin photosensitive epoxy membrane with low thermal conductivity. I PROCEEDINGS OF THE 17TH INTERNATIONAL VACUUM CONGRESS/13TH INTERNATIONAL CONFERENCE ON SURFACE SCIENCE/INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY. (Journal of Physics: Conference Series (Online Edition)). S. 082048-  

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2007). Development of an infrared thermopile detector with a thin self-supporting SU-8 membrane. I 2007 IEEE SENSORS, VOLS 1-3. New York : (IEEE Sensors). S. 836--839.  

Bertilsson, K. & Harris, C. (2007). Comparison of bipolar and unipolar SiC switching devices for very high power applications. I Silicon Carbide and Related Materials 2006. (MATERIALS SCIENCE FORUM). S. 975--978.

O'Nils, M. , Oelmann, B. , Bertilsson, K. , Nilsson, H. & Thungström, G. (2005). A Project Based Master's Programme for SoF/SoC based Sensor Systems. I Proceedings of the 2005 European Conference on Circuit Theory and Design.. S. 123--126.  

Bertilsson, K. & Nilsson, H. (2003). The power of using automatic device optimization, based on iterative device simulations, in design of high-performance devices. I 2003 International Semiconductor Device Research Symposium, ISDRS 2003 - Proceedings.. S. 152--153.  

Bertilson, K. , Hjelm, M. , Nilsson, H. & Petersson, S. (2001). Monte Carlo Simulation of 4H and 6H-SiC short channel MOSFETs. I High Temperature Electronics Network. HITEN ; 4 (Oslo) : 2001.06.05-08 : Proceedings of the International Conference on High Temperature Electronics : held in Oslo, Norway, 5th - 8th June 2001. Oxford : . S. 199-

Nilsson, H. , Bertilsson, K. , Dubaric, E. & Hjelm, M. (2001). Numerical simulation of field effect transistors in 4H and 6H-SiC.

Bertilsson, K. , Nilsson, H. & Petersson, S. (2000). Simulation of anisotropic Breakdown in 4H-SiC Diodes. I IEEE Workshop on Computers in Power Electronics : COMPEL 2000.. S. 118--120.

Patent

Bertilsson, K. (2013). A transformer .  

Harris, C. , Basceri, C. & Bertilsson, K. (2012). Schottky diode with incorporated pn- junctions .  

Bertilsson, K. (2011). Transformer .  

Harris, C. , Bertilsson, K. & Konstantinov, A. (2011). Method of manufacturing silicon carbide self-aligned epitaxial MOSFET for high powered device applications .  

Harris, C. , Basceri, C. & Bertilsson, K. (2010). Semiconductor device .  

Harris, C. , Bertilsson, K. & Konstantinov, A. (2009). Silicon carbide self-aligned epitaxial MOSFET for high powered device applications .  

Nilsson, H. , Olin, H. , Bertilsson, K. & Hummelgård, M. (2005). Nanoelectronic device (Swedish Patent Application no. 0501443-6) .