Roy Nilsen
Om
Roy Nilsen, born 1956, is professor in Electric Drives at the Department of Electric Power Engineering at NTNU. He holds an MSC and PhD in Electrical Engineering from NTH/NTNU 1983/84 and 1987, respectively. He was professor in Electric Drives in the period 1996-2006 and in again in fulltime position as professor since April 2017.
He has more than 30 years experience within R&D in the field of Electrical Drives, both in industrial- and marine drives. In the period 1984 until 1987 he was part-time employed by Norwegian Electric Brown Boveri (NEBB), today Asea Brown Boveri (ABB). From 1987 until 1996 he was full-time employed at ABB. In 1988/89 he was working at ABB Drives in Turgi, Switzerland. In 1993/94 he was Program Manager for Automotive Drives, R&D , AC Drives in ABB. In the years 1995-1996 he was Senior Research Manager at ABB Corporate Research, Norway. From 1996-2006 he was a professor within Electric Drives at NTNU. In the period 2001 until 2006, he was part-time employed at Aker/Wärtsilä and was responsible for the motor SW development in the Power Drive development (800-5000 kW 690 V marine drives). From 2006-2017 he was full-time employed at Wärtsilä/The Switch. In addition, he was a technical advisor at Smart Motor from 2001 to 2013. Since 1993 he has been one of the Norwegian members in the International Steering Committee (ISC) for European Power Electronics conference (EPE).
Fields of research have been sensorless control, motor control in general, resonance converters for electrostatic filters and sub-marines, marine drives and on-board DC-distribution. He has also worked with modelling and life-time calculation for batteries used on-board ferries and Offshore Supply Vessels.
Books/Lecture Notes/ PhD thesis:
Nilsen Roy: Elektriske motordrifter. Lecture Notes , NTNU Trondheim 2004.
211 pages - 3rd edition
Nilsen Roy: Electric Drives. Lecture Notes , NTNU Trondheim 2016.
211 pages - 4th edition.
Nilsen Roy: Modeling, identification and control of an induction machine
Dr.-Ing. Thesis NTH, Trondheim – 1987
Selected academic and professional publications:
[P1] Maharjan M., : Implementation of Synchronous Optimal Modulation in
Undeland T.M, Nilsen R. Field Programmable Gate Array. Proceedings of the 5th International Conference on Power and Energy Systems (ICPS), 28-30 October 2013, Kathmandu, Nepal
[P2] Gjerde S.S, Ljøkelsøy K. , : A Modular Series Connected Converter Structure Suitable for a .
R. Nilsen, T. Undeland High-Voltage Direct Current Transformerless Offshore Wind
Turbine. Journal: Wind Energy 2013
[P3] Nilsen R. , Sørfonn I : Hybrid Power Generation Systems, Invited paper for
EPE 2009, Barcelona
[P4] Gullvik W; Nilsen R., : Active Damping of Resonance Oscillations in LCL-filter Based on
Norum, L Virtual Flux and Virtual Resistor. EPE2007 Riga
[P5] Øvrebø S; Nilsen R. : New Self Sensing Scheme Based on INFORM, Heterodyning
and Luenberger Observer, IEMCD, Madison, Wisconsin,
1 - 4 June 2003
[P6] Tomta G.; Lund, R ; : Calculation of AC side harmonic losses in three-level converters
Nilsen R. Converters. EPE 2003, Tolouse, France
[P7] Lund, R ; Beverfjord J. : Reduced Analytic Power Loss Expressions for Diode Clamped
Øvrebø S; Nilsen R. Converters. EPE-PEMC 2002 Dubrovnik.
[P8] T. Melaa, A.K. Ådnanes, : Evaluation of resonant converters for increased softswitching
K. Øye, T.F. Nestli , range. EPE97- Trondheim
R. Nilsen, P. Ranstad
[P9] R. Nilsen , : Direct Torque Controlled induction motor drive utilized in an
T. Kasteenpohja electrical vehicle
EPE'95 - Sevilla, Spain
[P10] A.K. Ådnanes, R. Nilsen , : Efficiency Analysis of Electrical Vehicles, with Emphasis
R. Løken, L. Norum on Efficiency Optimized Excitation
IEEE IAS annual meeting , Tororonto, Oct. 02-08. 1993
[P11] T.F. Nestli, : Evaluation and comparison of predictor models for rotor flux
R. Nilsen calculation in induction motors
IEEE PESC'94- Taipei, Taiwan
[P12] R. Nilsen , : New Reduced-order observer with parameter adaption for
M.P. Kazmierkowski flux estimation in induction motors
IEEE PESC'92-Toledo Spain
[P13] R. Nilsen , : Reduced-order observer with parameter adaption for fast rotor
M.P. Kazmierkowski flux estimation in induction machines
IEE Proceedings, Vol.136, Pt.D, No. 1, January 1989
(Awarded paper)
[P14] K. Vangen, T. Melaa, : Efficient high-frequency soft-switched power converter with
S. Bergsmark, R. Nilsen signal processor control
INTELEC'91 - Nov.1991
[P15] G. Tomta , R. Nilsen: Analytical equations for three level NPC converters.
EPE'2001 - Graz, Austria
Publikasjoner
2020
-
Perera, Aravinda;
Nilsen, Roy.
(2020)
A Sensorless Control Method for IPMSM with an Open-Loop Predictor for Online Parameter Identification.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Tiwari, Raghbendra;
Nilsen, Roy;
Nysveen, Arne.
(2020)
Active NPC Converter for Variable Speed Operation of Pumped Storage Hydropower Plant.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Tiwari, Raghbendra;
Nilsen, Roy.
(2020)
Analytical Loss Equations for Three Level Active Neutral Point Clamped Converters.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2019
-
Tiwari, Raghbendra;
Nilsen, Roy.
(2019)
Active Compensation of Unbalanced Load Currents in Grid Connected Voltage Source Converters .
IEEE (Institute of Electrical and Electronics Engineers)
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2018
-
Valavi, Mostafa;
Devillers, Emile;
Le Besnerais, Jean;
Nysveen, Arne;
Nilsen, Roy.
(2018)
Influence of Converter Topology and Carrier Frequency on Airgap Field Harmonics, Magnetic Forces, and Vibrations in Converter-Fed Hydropower Generator
.
IEEE transactions on industry applications
Vitenskapelig artikkel
-
Tiwari, Subhadra;
Undeland, Tore Marvin;
Midtgård, Ole-Morten;
Nilsen, Roy.
(2018)
SiC MOSFETs for Offshore Wind Applications.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
2017
-
Valavi, Mostafa;
Nysveen, Arne;
Nilsen, Roy.
(2017)
Investigation of magnetic field and radial force harmonics in a hydrogenerator connected to a three-level NPC converter.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Valavi, Mostafa;
Nysveen, Arne;
Nilsen, Roy;
Le Besnerais, Jean;
Devillers, Emile.
(2017)
Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2014
-
Gjerde, Sverre Skalleberg;
Ljøkelsøy, Kjell;
Nilsen, Roy;
Undeland, Tore Marvin.
(2014)
A modular series connected converter structure suitable for a high-voltage direct current transformerless offshore wind turbine.
Wind Energy
Vitenskapelig artikkel
2007
-
Gullvik, William;
Norum, Lars Einar;
Nilsen, Roy.
(2007)
Active Damping of Resonance Oscillations in LCL-Filters Based on Virtual Flux and Virtual Resistor.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Tamrakar, I;
Shilpakar, LB;
Fernandes, BG;
Nilsen, Roy.
(2007)
Voltage and frequency control of parallel operated synchronous generator and induction generator with STATCOM in micro hydro scheme.
IET Generation, Transmission & Distribution
Vitenskapelig artikkel
Tidsskriftspublikasjoner
-
Valavi, Mostafa;
Devillers, Emile;
Le Besnerais, Jean;
Nysveen, Arne;
Nilsen, Roy.
(2018)
Influence of Converter Topology and Carrier Frequency on Airgap Field Harmonics, Magnetic Forces, and Vibrations in Converter-Fed Hydropower Generator
.
IEEE transactions on industry applications
Vitenskapelig artikkel
-
Tiwari, Subhadra;
Undeland, Tore Marvin;
Midtgård, Ole-Morten;
Nilsen, Roy.
(2018)
SiC MOSFETs for Offshore Wind Applications.
Journal of Physics: Conference Series (JPCS)
Vitenskapelig artikkel
-
Gjerde, Sverre Skalleberg;
Ljøkelsøy, Kjell;
Nilsen, Roy;
Undeland, Tore Marvin.
(2014)
A modular series connected converter structure suitable for a high-voltage direct current transformerless offshore wind turbine.
Wind Energy
Vitenskapelig artikkel
-
Tamrakar, I;
Shilpakar, LB;
Fernandes, BG;
Nilsen, Roy.
(2007)
Voltage and frequency control of parallel operated synchronous generator and induction generator with STATCOM in micro hydro scheme.
IET Generation, Transmission & Distribution
Vitenskapelig artikkel
Del av bok/rapport
-
Perera, Aravinda;
Nilsen, Roy.
(2020)
A Sensorless Control Method for IPMSM with an Open-Loop Predictor for Online Parameter Identification.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Tiwari, Raghbendra;
Nilsen, Roy;
Nysveen, Arne.
(2020)
Active NPC Converter for Variable Speed Operation of Pumped Storage Hydropower Plant.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Tiwari, Raghbendra;
Nilsen, Roy.
(2020)
Analytical Loss Equations for Three Level Active Neutral Point Clamped Converters.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Tiwari, Raghbendra;
Nilsen, Roy.
(2019)
Active Compensation of Unbalanced Load Currents in Grid Connected Voltage Source Converters .
IEEE (Institute of Electrical and Electronics Engineers)
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Valavi, Mostafa;
Nysveen, Arne;
Nilsen, Roy.
(2017)
Investigation of magnetic field and radial force harmonics in a hydrogenerator connected to a three-level NPC converter.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Valavi, Mostafa;
Nysveen, Arne;
Nilsen, Roy;
Le Besnerais, Jean;
Devillers, Emile.
(2017)
Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator.
IEEE conference proceedings
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Gullvik, William;
Norum, Lars Einar;
Nilsen, Roy.
(2007)
Active Damping of Resonance Oscillations in LCL-Filters Based on Virtual Flux and Virtual Resistor.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Undervisning
Emner
Formidling
2018
-
PosterPerera, Aravinda; Nilsen, Roy. (2018) Electric motor drive system for highly reliable and productive mining machines for deep-sea. International Marine Minerals Society (IMMS) Underwater Mining Conference , Bergen 2018-09-10 - 2018-09-14
2017
-
Vitenskapelig foredragValavi, Mostafa; Nysveen, Arne; Nilssen, Robert; Nilsen, Roy; Besnerais, Jean Le; Devillers, Emile. (2017) Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator . IEEE 2017 IEEE Energy Conversion Congress and Exposition (ECCE) , Cincinnati, Ohio 2017-10-01 - 2017-10-05
2007
-
Vitenskapelig foredragGullvik, William; Norum, Lars Einar; Nilsen, Roy. (2007) Active Damping of Resonance Oscillations in LCL-Filters Based on Virtual Flux and Virtual Resistor. EPE Association EPE 2007 - the 12th European Conference on Power Electronics and Applicartions , Ålborg 2007-09-02 - 2007-09-05
2004
-
PosterØvrebø, Sigurd; Nilssen, Robert; Nilsen, Roy. (2004) High Frequency Flux Distribution in Permanent Magnet Synchronous Machines. NTNU, Inst.itutt for elkraftteknikk, energiomforming NORPIE 2004 , NTNU, Trondheim 2004-06-14 - 2004-06-16
-
PosterLund, Richard; Tomta, Gjermund; Nilsen, Roy. (2004) Output Harmonic Losses in Three-level Converters using Sine PWM with 3. Harmonic Injection. NTNU, Inst. for elkraftteknikk, energiomforming NORPIE 2004 , NTNU, Trondheim 2004-06-14 - 2004-06-16
-
PosterØvrebø, Sigurd; Nilsen, Roy; Nilssen, Robert. (2004) Saliency Modeling in Radial Flux Permanent Magnet Synchronous Machines. NTNU, Institutt for elkraftteknikk, Energiomforming NORPIE 2004 , NTNU, Trondheim 2004-06-14 - 2004-06-16
2003
-
Vitenskapelig foredragØvrebø, Sigurd; Nilsen, Roy. (2003) New self sensing scheme based on INFORM, heterodyning and Luenberger observer. The 2003 Australasian Universities Power Engineering Conference - AUPEC 2003 , New Zealand 2003-10-01 -
-
Vitenskapelig foredragLund, Richard; Tomta, Gjermund; Nilsen, Roy. (2003) Analytical Calculations of AC Side Harmonic Losses in Three-Level Converters. The 10th European Conference on Power Electronics and Applications - EPE 2003 , Toulouse, France 2003-09-04 -
-
Vitenskapelig foredragØvrebø, Sigurd; Nilsen, Roy. (2003) New self sensing scheme based on INFORM, heterodyning and Luenberger observer. IEEE International Electric Machines and Drives Conference , Madison, Wisconsin, USA 2003-06-04 -
2002
-
Vitenskapelig foredragTomta, Gjermund; Lund, Richard; Nilsen, Roy. (2002) Calculation of AC side harmonic losses in three-level converters. NORPIE 2002 , Stockholm, Sweden 2002-08-14 -
-
Vitenskapelig foredragLund, Richard; Beverfjord, Jonas; Øvrebø, Sigurd; Nilsen, Roy. (2002) Analytical power loss expressions for diode clamped converters. EPE-PEMC 2002 , Dubrovnik, Croatia 2002-09-11 -
-
Vitenskapelig foredragLund, Richard; Tomta, Gjermund; Nilsen, Roy. (2002) Analytical Power Loss Expressions for diode clamped converters. NORPIE 2002 , Stockholm, Sweden 2002-08-14 -
2001
-
Vitenskapelig foredragNilsen, Roy; Tomta, Gjermund. (2001) Analytical equations for three level NPC converters. 9th European Conference on Power Electronics and Applications , Graz, Austria 2001-08-29 -
1997
-
Vitenskapelig foredragMelaa, T.; Ådnanes, A.K.; Øye, K.; Nestli, T.F.; Nilsen, Roy; Ranstad, P.. (1997) Evaluation of resonant converters for increased softswitching range. 7th European Conference on Power Electronics and Applications , Trondheim
-
Vitenskapelig foredragEdvardsen, P.A.; Nestli, T.F.; Nilsen, Roy; Kolstad, Helge. (1997) Steady-state power flow and efficiency optimizing analysis of a variable speed constant frequency generating system. 7th European Conference on Power Electronics and Applications , Trondheim