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

Tiwari, Raghbendra; Nilsen, Roy. (2020) Analytical Loss Equations for Three Level Active Neutral Point Clamped Converters.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Tiwari, Raghbendra; Nilsen, Roy; Nysveen, Arne. (2020) Active NPC Converter for Variable Speed Operation of Pumped Storage Hydropower Plant.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Perera, Aravinda; Nilsen, Roy. (2020) A Sensorless Control Method for IPMSM with an Open-Loop Predictor for Online Parameter Identification.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2019

Tiwari, Raghbendra; Nilsen, Roy. (2019) Active Compensation of Unbalanced Load Currents in Grid Connected Voltage Source Converters.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel

2018

Valavi, Mostafa; Devillers, Emile; Besnerais, Jean Le; 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.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Valavi, Mostafa; Nysveen, Arne; Nilsen, Roy; Besnerais, Jean Le; Devillers, Emile. (2017) Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator.
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; Besnerais, Jean Le; 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

Tiwari, Raghbendra; Nilsen, Roy. (2020) Analytical Loss Equations for Three Level Active Neutral Point Clamped Converters.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Tiwari, Raghbendra; Nilsen, Roy; Nysveen, Arne. (2020) Active NPC Converter for Variable Speed Operation of Pumped Storage Hydropower Plant.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Perera, Aravinda; Nilsen, Roy. (2020) A Sensorless Control Method for IPMSM with an Open-Loop Predictor for Online Parameter Identification.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Tiwari, Raghbendra; Nilsen, Roy. (2019) Active Compensation of Unbalanced Load Currents in Grid Connected Voltage Source Converters.
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.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Valavi, Mostafa; Nysveen, Arne; Nilsen, Roy; Besnerais, Jean Le; Devillers, Emile. (2017) Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator.
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

Poster

Perera, Aravinda; Nilsen, Roy. (2018) Electric motor drive system for highly reliable and productive mining machines for deep-sea. Underwater Mining Conference , Bergen 10.09.2018 - 14.09.2018

2017

Vitenskapelig foredrag

Valavi, 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. 2017 IEEE Energy Conversion Congress and Exposition (ECCE) , Cincinnati, Ohio 01.10.2017 - 05.10.2017

2007

Vitenskapelig foredrag

Gullvik, William; Norum, Lars Einar; Nilsen, Roy. (2007) Active Damping of Resonance Oscillations in LCL-Filters Based on Virtual Flux and Virtual Resistor. EPE 2007 - the 12th European Conference on Power Electronics and Applicartions , Ålborg 02.09.2007 - 05.09.2007

2004

Poster

Øvrebø, Sigurd; Nilsen, Roy; Nilssen, Robert. (2004) Saliency Modeling in Radial Flux Permanent Magnet Synchronous Machines. NORPIE 2004 , NTNU, Trondheim 14.06.2004 - 16.06.2004
Poster

Øvrebø, Sigurd; Nilssen, Robert; Nilsen, Roy. (2004) High Frequency Flux Distribution in Permanent Magnet Synchronous Machines. NORPIE 2004 , NTNU, Trondheim 14.06.2004 - 16.06.2004
Poster

Lund, Richard; Tomta, Gjermund; Nilsen, Roy. (2004) Output Harmonic Losses in Three-level Converters using Sine PWM with 3. Harmonic Injection. NORPIE 2004 , NTNU, Trondheim 14.06.2004 - 16.06.2004

2003

Vitenskapelig foredrag

Lund, 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 04.09.2003 -
Vitenskapelig foredrag

Øvrebø, 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 04.06.2003 -
Vitenskapelig foredrag

Øvrebø, 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 01.10.2003 -

2002

Vitenskapelig foredrag

Lund, Richard; Beverfjord, Jonas; Øvrebø, Sigurd; Nilsen, Roy. (2002) Analytical power loss expressions for diode clamped converters. EPE-PEMC 2002 , Dubrovnik, Croatia 11.09.2002 -
Vitenskapelig foredrag

Tomta, Gjermund; Lund, Richard; Nilsen, Roy. (2002) Calculation of AC side harmonic losses in three-level converters. NORPIE 2002 , Stockholm, Sweden 14.08.2002 -
Vitenskapelig foredrag

Lund, Richard; Tomta, Gjermund; Nilsen, Roy. (2002) Analytical Power Loss Expressions for diode clamped converters. NORPIE 2002 , Stockholm, Sweden 14.08.2002 -

2001

Vitenskapelig foredrag

Nilsen, Roy; Tomta, Gjermund. (2001) Analytical equations for three level NPC converters. 9th European Conference on Power Electronics and Applications , Graz, Austria 29.08.2001 -

1997

Vitenskapelig foredrag

Melaa, 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 foredrag

Edvardsen, 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

Språkvelger

Roy Nilsen

Om

Publikasjoner

2020

2019

2018

2017

2014

2007

Tidsskriftspublikasjoner

Del av bok/rapport

Undervisning

Emner

Formidling

2018

2017

2007

2004

2003

2002

2001

1997