Thomas Hammarström

Influence of voltage overshoot in enamel wire winding insulation systems

Influence of PD characteristics within motor windings exposed to elevated temperatures

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

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

2022

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

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

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

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

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

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

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

2021

Review of Technical Design and Safety Requirements for Vehicle Chargers and Their Infrastructure According to National Swedish and Harmonized European Standards

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

Polarity Effect on Electric Tree Inception in HVDC Cable Insulation

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

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

2021

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

DC Electrical Trees in XLPE Induced by Short Circuits

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

2020

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

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

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

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

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

Multilevel PWM: A Tool to Explore Insulation PD Characteristics

Partial Discharge Characteristics of Electrical Treeing in XLPE insulation utilizing Multi Level PWM Waveforms

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

Partial discharge classification in power electronics applications using machine learning

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

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

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

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

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

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

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

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

Partial discharge characteristics at ultra-short voltage risetimes

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

PD characteristics at Square Shaped Voltages Applying Two Different Detecting

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

PD characteristics at Square Shaped Voltages Applying Two Different Detecting Techniques

Loss Current Studies of Partial Discharge Activity

Study of Partial Discharge Activity by Excess Current

2014

Partial Discharges in Motor Wires at PWM Voltages of Different Smoothness

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

2014

Partial Discharges at Fast Rising Voltages

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

Stochastic Detection of Partial Discharges

PARTIAL DISCHARGES IN A STATOR UNDER SYNTHEZISED VOLTAGE WAVEFORMS

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

2013

PD Properties when Varying the Smoothness of Synthesized Waveforms

Detection of Partial Discharges at Fast Rising Voltages

Resonant PD signal decoupling circuit for rapidly changing voltages

CHANGES IN PD PROPERTIES WITH DECREASING VOLTAGE RISE

Evidence for Changing PD Properties at Short Voltage Rise Times

Method for measuring cylinder specific parameters in a combustion engine

Design and evaluation of the ELEVATE two-stroke automotive engine