Thomas Hammarström

Docent vid Elkraftteknik

Jag disputerade 2014 inom området högspänningsteknik med partiella urladdningar i högspänningsisolation vid snabba vågfronter (ex PWM) som huvudintresse. Målsättningen är att undersöka och förstå hur slitaget på isolationsmaterialet påverkas vid denna applicerade spänningsform jämfört med den traditionella sinusformade. Syftet med denna forskning är detta ska leda till ökad livslängd på exempelvis motorlindingar.

Källa: chalmers.se
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Visar 57 publikationer

2023

The Use of PD Patterns to Evaluate the Wear-Resistance and Manufacturing Quality to Estimate Expected Lifetime of Ignition Coils

Johan Tidholm, Martin Gordon, Thomas Hammarström
Proceedings of ASME 2023 ICE Forward Conference, ICEF 2023
Paper i proceeding
2023

Influence of voltage overshoot in enamel wire winding insulation systems

Thomas Hammarström
2023 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
Paper i proceeding
2023

Square Shaped Waveform Pulse Control to minimize PD Exposure within Motor Insulation

Thomas Hammarström, Stanislaw Gubanski
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. In Press
Artikel i vetenskaplig tidskrift
2023

Influence of PD characteristics within motor windings exposed to elevated temperatures

Thomas Hammarström
2023 International Symposium on Electrical Insulating Materials, p. 324-327
Paper i proceeding
2022

Evaluation of Different Waveforms to Study the Insulation Performance on Electrical Vehicle Motors

Thomas Hammarström
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. Vol. 2022-November, p. 439-442
Paper i proceeding
2022

DC Electrical Trees in Polymer Insulation Inflicted by Rapidly Decreasing Short Circuit Voltage Flanks

Thomas Hammarström, Sarath Kumara, Xiangdong Xu et al
ICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings, p. 154-157
Paper i proceeding
2022

Classification of Partial Discharges Originating from Multi-level PWM Using Machine Learning

Ebrahim Balouji, Thomas Hammarström, Tomas McKelvey
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. In Press
Artikel i vetenskaplig tidskrift
2022

Evaluation of different approaches to measure partial discharge characteristics within electric motor insulation

Thomas Hammarström
2022 International Conference on Electrical Machines and Systems, ICEMS 2022, p. 1-6
Paper i proceeding
2022

Invariant electrical conductivity upon thermal ageing of a crosslinked copolymer blend for high voltage insulation

Sarath Kumara, Amir Masoud Pourrahimi, Azadeh Soroudi et al
Materials Advances. Vol. In Press
Artikel i vetenskaplig tidskrift
2022

Reduction of Electric Stress in High Voltage Motor Insulation by Adjusting Individual PWM Flanks

Thomas Hammarström
2022 IEEE International Conference on Power Systems Technology: Embracing Advanced Technology in Power and Energy Systems for Sustainable Development, POWERCON 2022
Paper i proceeding
2021

Detection of Electrical Tree Formation in XLPE Insulation through Applying Disturbed DC Waveforms

Thomas Hammarström, Stanislaw Gubanski
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 8 (5), p. 1669-1676
Artikel i vetenskaplig tidskrift
2021

Repurposing Poly(3-hexylthiophene) as a Conductivity-Reducing Additive for Polyethylene-Based High-Voltage Insulation

Amir Masoud Pourrahimi, Sarath Kumara, Fabrizio Palmieri et al
Advanced Materials. Vol. In Press
Artikel i vetenskaplig tidskrift
2021

Characteristics of partial discharges in an experimental setup reproducing HVDC cable insulation operating conditions

G. Rizzo, Thomas Hammarström, A Imburgia et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. Vol. 2021-December, p. 191-194
Paper i proceeding
2021

Combination of Adjustable Inverter Level and Voltage Rise Time for Electrical Stress Reduction in PWM Driven Motor Windings

Thomas Hammarström
IEEE Electrical Insulation Magazine. Vol. 37 (1), p. 17-26
Artikel i vetenskaplig tidskrift
2021

PWM Voltage Rise Time and Pulse Width Control to Minimize Partial Discharge Exposure

Thomas Hammarström
ICEMS 2021 - 2021 24th International Conference on Electrical Machines and Systems, p. 2611-2615
Paper i proceeding
2021

DC Electrical Trees in XLPE Induced by Short Circuits

Sarath Kumara, Thomas Hammarström, Xiangdong Xu et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. Vol. 2021-December, p. 275-278
Paper i proceeding
2021

Polarity Effect on Electric Tree Inception in HVDC Cable Insulation

Sarath Kumara, Thomas Hammarström, Yuriy Serdyuk
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 28 (5), p. 1819-1827
Artikel i vetenskaplig tidskrift
2020

A General Measurement Set-up Approach to Evaluate Insulation System Quality by Exploring PWM and DC Biased waveforms

Thomas Hammarström
IEEE Transactions on Industry Applications. Vol. 56 (4), p. 3614-3624
Artikel i vetenskaplig tidskrift
2020

Electrical Characterization of a New Crosslinked Copolymer Blend for DC Cable Insulation

Sarath Kumara, Xiangdong Xu, Thomas Hammarström et al
Energies. Vol. 13 (6)
Artikel i vetenskaplig tidskrift
2020

Multi-rise time PWM: A way to reduce PD exposure in motor windings

Thomas Hammarström
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 27 (2), p. 613-621
Artikel i vetenskaplig tidskrift
2020

Comparison of Different Methods for Characterization of DC Conductivity of Insulating Polymers

Sarath Kumara, Xiangdong Xu, Thomas Hammarström et al
Proceedings of the 2020 IEEE 3rd International Conference on Dielectrics, ICD 2020, p. 435-438
Paper i proceeding
2019

The Effect of the Harmonic Content Generated by AC/DC Modular Multilevel Converters on HVDC Cable Systems

P. Romano, A. Imburgia, Yuriy Serdyuk et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, p. 666-669
Paper i proceeding
2019

The Implications on the PD Characteristics of Unipolar versus Bipolar PWM waveforms

Thomas Hammarström
2019 IEEE Electrical Insulation Conference, EIC 2019, p. 42-45
Paper i proceeding
2019

Multilevel PWM: A Tool to Explore Insulation PD Characteristics

Thomas Hammarström
IEEE Transactions on Instrumentation and Measurement. Vol. 68 (10), p. 4075-4084
Artikel i vetenskaplig tidskrift
2019

Partial discharge classification in power electronics applications using machine learning

Ebrahim Balouji, Thomas Hammarström, Tomas McKelvey
GlobalSIP 2019 - 7th IEEE Global Conference on Signal and Information Processing, Proceedings
Paper i proceeding
2019

Deformation of bubbles in silicon gel insulation under an alternating electric field

G. Rizzo, P. Romano, G. Ala et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. Vol. 2019-October, p. 536-539
Paper i proceeding
2019

Partial discharge characteristics of electrical treeing in XLPE insulation exposed to voltages of different rise times

Thomas Hammarström, Tord Bengtsson, Stanislaw Gubanski
IEEJ Transactions on Fundamentals and Materials. Vol. 139 (2), p. 85-91
Artikel i vetenskaplig tidskrift
2018

Partial discharge characteristics within motor insulation exposed to multi-level PWM waveforms

Thomas Hammarström
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 25 (Issue 2), p. 559-567
Artikel i vetenskaplig tidskrift
2018

Partial discharges at different voltage waveshapes: Comparison between two different acquisition systems

P. Romano, Thomas Hammarström, Tord Bengtsson et al
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 25 (2), p. 584-593
Artikel i vetenskaplig tidskrift
2018

Partial discharge characteristics at ultra-short voltage risetimes

Thomas Hammarström
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 25 (6), p. 2241-2249
Artikel i vetenskaplig tidskrift
2018

Partial discharge characteristics within motor insulatioi exposed to multi-level PWM waveforms

Thomas Hammarström
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 25 (2), p. 559-567
Artikel i vetenskaplig tidskrift
2018

A Measurement Set-Up Method to Evaluate Motor Winding Quality and Winding Insulation by Exploring Discharge Characteristics

Thomas Hammarström
2018 21st International Conference on Electrical Machines and Systems (ICEMS), p. 678-683
Paper i proceeding
2018

Differences in partial discharge characteristics due to increased conductivity of the insulation material

Thomas Hammarström
Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials, p. 148-151
Paper i proceeding
2018

Partial Discharge Measurements under DC Voltages Containing Harmonics Produced by Power Electronic Devices

Pietro Romano, Amir Parastar, A. Imburgia et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. Vol. 2018-October, p. 558-561
Paper i proceeding
2017

Partial Discharge Characteristics of Electrical Treeing in XLPE Insulation Exposed to Voltages of Different Rise Times

Thomas Hammarström, Tomas Bengtsson, Stanislaw Gubanski
2017 INTERNATIONAL SYMPOSIUM ON ELECTRICAL INSULATING MATERIALS (ISEIM). Vol. 1-2, p. 407-410
Paper i proceeding
2017

Partial discharge characteristics in motor insulations under exposure to multi-level inverters

Thomas Hammarström, Tord Bengtsson, Stanislaw Gubanski
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, p. 307-310
Paper i proceeding
2016

PD characteristics at Square Shaped Voltages Applying Two Different Detecting

A Madonia, Pietro Romano, Thomas Hammarström et al
IEEE Conference on Electrical Insulation and Dielectric Phenomena 2016
Paper i proceeding
2016

Partial Discharge of Gel Insulated High Voltage Power Modules subjected to Unconventional Voltage Waveforms

A. Madonia, P. Romano, Thomas Hammarström et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, p. 715-718
Paper i proceeding
2016

PD characteristics at Square Shaped Voltages Applying Two Different Detecting Techniques

A. Madonia, P. Romano, Thomas Hammarström et al
Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, p. 247-250
Paper i proceeding
2015

Loss Current Studies of Partial Discharge Activity

Xiangdong Xu, Tord Bengtsson, Thomas Hammarström et al
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 22 (1), p. 472-481
Artikel i vetenskaplig tidskrift
2015

Study of Partial Discharge Activity by Excess Current

Xiangdong Xu, Tord Bengtsson, Thomas Hammarström et al
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 22 (5), p. 3028-3036
Artikel i vetenskaplig tidskrift
2014

Partial Discharges in Motor Wires at PWM Voltages of Different Smoothness

Thomas Hammarström, Tord Bengtsson, Jörgen Blennow et al
Proceedings of 2014 International Symposium on Electrical Insulating Materials (ISEIM 2014), June 1-5, 2014, Niigata City, Japan, p. 184-187
Paper i proceeding
2014

Partial Discharge Behavior of a Newly Developed Enamel Insulation at Various Voltage Rise Times

Tuan Anh Hoang, Thomas Hammarström, Tord Bengtsson et al
Proceedings of 2014 International Symposium on Electrical Insulating Materials (ISEIM 2014), June 1-5, 2014, Niigata City, Japan, p. 241-244
Paper i proceeding
2014

Partial Discharges at Fast Rising Voltages

Thomas Hammarström
Doktorsavhandling
2013

Stochastic Detection of Partial Discharges

Tord Bengtsson, Elisabeth Lindell, Thomas Hammarström
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 20 (6), p. 2203-2211
Artikel i vetenskaplig tidskrift
2013

Analysis of Multiple Electrical Trees Incepted at Wire Electrode Test Object by Means of PD Detection

Anette Johansson, Thomas Hammarström, Markus Jarvid et al
Proc. of Jicable HVDC'13 Seminar, p. paper P06-
Paper i proceeding
2013

PARTIAL DISCHARGES IN A STATOR UNDER SYNTHEZISED VOLTAGE WAVEFORMS

Thomas Hammarström, Tord Bengtsson, Jörgen Blennow et al
Proceedings of the 18th International Symposium on High Voltage Engineering 2013 (CD-ROM)
Paper i proceeding
2013

PD Properties when Varying the Smoothness of Synthesized Waveforms

Thomas Hammarström, Tord Bengtsson, Jörgen Blennow et al
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 20 (6), p. 2035-2041
Artikel i vetenskaplig tidskrift
2013

Reflections on an Integrated Content and Language Project-Based Design of a Technical Communication Course for Electrical Engineering Students.

Becky Bergman, Ann-Marie Eriksson, Jörgen Blennow et al
Journal of Academic Writing. Vol. 3 (1), p. 1-14
Artikel i vetenskaplig tidskrift
2011

Detection of Partial Discharges at Fast Rising Voltages

Thomas Hammarström
Licentiatavhandling
2011

Evidence for Changing PD Properties at Short Voltage Rise Times

Thomas Hammarström, Tord Bengtsson, Jörgen Blennow et al
IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 18 (5), p. 1686-1692
Artikel i vetenskaplig tidskrift
2011

CHANGES IN PD PROPERTIES WITH DECREASING VOLTAGE RISE

Thomas Hammarström, Tord Bengtsson, Jörgen Blennow et al
The Proceedings of 17th International Symposium on High Voltage Engineering, p. D-013
Paper i proceeding
2011

Resonant PD signal decoupling circuit for rapidly changing voltages

Thomas Hammarström, Tord Bengtsson, Jörgen Blennow et al
22nd Nordic Insulation Symposium (NORDIS 11), June 13-15, Tampere, Finland, p. 149-152
Övrigt konferensbidrag
2005

Method for measuring cylinder specific parameters in a combustion engine

Jörgen Bengtsson, Thomas Hammarström
Patent
2003

Design and evaluation of the ELEVATE two-stroke automotive engine

Dave blundell, Jamie Turner, Pierre Duret et al
SAE (Society of Automotive Engineers) Transactions. Vol. 112 (3), p. 613-627
Artikel i vetenskaplig tidskrift

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Visar 3 forskningsprojekt

2020–

Activities within materials and diagnostics for high-voltage networks

Yuriy Serdyuk Elnät och komponenter
Thomas Hammarström Elnät och komponenter
Sarath Kumara Elnät och komponenter
Chalmers

2019–2020

Advanced characterization of new insulation materials for next generation of HVDC power cables

Thomas Hammarström Elnät och komponenter
Yingwei Ouyang Christian Müller Group
Christian Müller Christian Müller Group
Roland Kádár Konstruktionsmaterial
Aleksandar Matic Materialfysik
Yuriy Serdyuk Elnät och komponenter
Chalmers

4 publikationer finns
2018–

Mechanisms of partial discharges in polymeric HVDC power cables

Yuriy Serdyuk Elnät och komponenter
Thomas Hammarström Elnät och komponenter
Chalmers

2 publikationer finns
Det kan finnas fler projekt där Thomas Hammarström medverkar, men du måste vara inloggad som anställd på Chalmers för att kunna se dem.