Tommi Kärkkäinen

Post-doctoral researcher

Electrical Engineering

LUT School of Energy Systems

Lappeenranta

Tommi.Karkkainen@lut.fi

+358401488341

Research areas

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

Artificial Intelligence

Signal Processing

Biography

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My research activities focus on the reliability of electronics, especially power electronics. Over the past years I have been studying condition monitoring and defect detection methods for electronic components, namely capacitors and power semiconductor modules. In quality assurance applications, better defect detection means fewer faulty products being shipped to the end user, resulting in increased customer happiness. The effects of the use environment on the reliability of components and systems is of particular interest.

A good understanding of electronics design, manufacturing, signal processing and statistical methods is useful for the reliability research efforts. I am continuously improving my skills in those areas, as well.

I am the teacher in charge of "Electronics, Laboratory Course 2". I also participate in teaching of the following courses: Electronics, Laboratory Course 1, Laboratory Course in Electrical Engineering 3, and Laboratory Course in Electrical Engineering for DIODI Students.

I have also served as a member of the electrical engineering curriculum work group 2017—2022.

Blockchain-based balance settlement ledger for energy communities in open electricity markets

2022

Publication type

A1 Journal article (refereed), original research

Author(s)

Nykyri Mikko, Kärkkäinen Tommi J., Levikari Saku, Honkapuro Samuli, Annala Salla, Silventoinen Pertti

Energy - Transition to carbon-neutral world

Renewable Energy, Sustainability and the Environment

LUT School of Energy Systems

Low-Concentration MFG Tests for Power Semiconductor Modules

2022

Publication type

Other

Author(s)

Kärkkäinen Tommi

Energy - Transition to carbon-neutral world

Safety, Risk, Reliability and Quality

LUT School of Energy Systems

Review of Demand Response and Energy Communities in Serious Games

2022

Publication type

A2 Review article, literature review, systematic review

Author(s)

Nykyri Mikko, Kärkkäinen Tommi J., Annala Salla, Silventoinen Pertti

Energy - Transition to carbon-neutral world

LUT School of Energy Systems

Detection of Corrosion in Thick Film Resistors by X-ray Imaging

2021

Publication type

A1 Journal article (refereed), original research

Author(s)

Ingman Jonny M., Jormanainen Joni P. A., Järvinen Samu-Kaius, Kanko Natalia I., Leppänen Joonas A. R., Vulli Aleksi M., Kärkkäinen Tommi J., Rautio Juuso, Jäppinen Janne, Silventoinen Pertti

Safety, Risk, Reliability and Quality

LUT School of Energy Systems

A facility for mixed flowing gas testing of and experimentation with power electronic components and systems

2020

Publication type

A4 Conference proceedings

Author(s)

Rautio Juuso, Jäppinen Janne, Kärkkäinen Tommi, Niemelä Markku, Silventoinen Pertti, Kiviniemi Mika, Leppänen Joonas, Ingman Jonny

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

Chemical Engineering (miscellaneous)

Engineering (miscellaneous)

LUT School of Energy Systems

Improved Modulation for Packed E-Cell Converter

2020

Publication type

A4 Conference proceedings

Author(s)

Korhonen Juhamatti, Järvisalo Heikki, Kärkkäinen Tommi, Mattsson Aleksi

Nondestructive Acoustic Testing of Ceramic Capacitors using One-Class Support Vector Machine with Automated Hyperparameter Selection

2020

Publication type

A1 Journal article (refereed), original research

Author(s)

Levikari Saku, Kärkkäinen Tommi J., Andersson Caroline, Tamminen Juha, Nykyri Mikko, Silventoinen Pertti

IoT Demonstration Platform for Education and Research

2019

Publication type

A4 Conference proceedings

Author(s)

Nykyri Mikko, Kuisma Mikko, Kärkkäinen Tommi J., Hallikas Jukka, Jäppinen Janne, Korpinen Katriina, Silventoinen Pertti

Electrical and Electronic Engineering

Engineering

LUT Business School

LUT School of Energy Systems

Localization of dielectric breakdown defects in multilayer ceramic capacitors using 3D X-ray imaging

2019

Publication type

A1 Journal article (refereed), original research

Author(s)

Ingman Jonny, Jormanainen Joni, Vulli Aleksi, Ingman Jimmy, Maula Kari, Kärkkäinen Tommi, Silventoinen Pertti

Instrumentation

Ceramics and Composites

Electrical and Electronic Engineering

Electronic, Optical and Magnetic Materials

Engineering

LUT School of Energy Systems

Predictive Analytics in a Pulp Mill using Factory Automation Data—Hidden Potential

2019

Publication type

A4 Conference proceedings

Author(s)

Nykyri Mikko, Kuisma Mikko, Kärkkäinen Tommi J., Junkkari Tero, Kerkelä Kari, Puustinen Jouko, Myrberg Jesse, Hallikas Jukka

Industrial and Manufacturing Engineering

Electrical and Electronic Engineering

Information Systems

LUT Business School

LUT School of Energy Systems

Acoustic Detection of Cracks and Delamination in Multilayer Ceramic Capacitors

2018

Publication type

A1 Journal article (refereed), original research

Author(s)

Levikari Saku, Kärkkäinen Tommi J., Andersson Caroline, Tamminen Juha, Silventoinen Pertti

Acoustics and Ultrasonics

Electrical and Electronic Engineering

Artificial Intelligence

Signal Processing

Computer Vision and Pattern Recognition

LUT School of Energy Systems

Acoustic phenomena in damaged ceramic capacitors

2018

Publication type

A1 Journal article (refereed), original research

Author(s)

Levikari Saku, Kärkkäinen Tommi, Andersson Caroline, Tamminen Juha, Silventoinen Pertti

Instrumentation

Acoustics and Ultrasonics

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

Engineering

Engineering (miscellaneous)

LUT School of Energy Systems

Discussion of ”A Comparative Study Between PI and Type-II Compensators for H-Bridge PFC Converter”

2018

Publication type

A1 Journal article (refereed), original research

Author(s)

Honkanen Jari, Järvisalo Heikki, Kärkkäinen Tommi, Korhonen Juhamatti

MLCC Acoustic Data Set

2018

Publication type

Other

Author(s)

Levikari Saku, Kärkkäinen Tommi J., Silventoinen Pertti, Andersson Caroline, Tamminen Juha

Acoustics and Ultrasonics

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

Artificial Intelligence

Mechanics of Materials

Signal Processing

Computer Vision and Pattern Recognition

LUT School of Energy Systems

Tehoelektroniikan luotettavuus

2018

Publication type

Other

Author(s)

Kärkkäinen Tommi

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

LUT School of Energy Systems

Acoustic detection of cracks and delamination in Multilayer Ceramic Capacitors

2017

Publication type

A4 Conference proceedings

Author(s)

Levikari Saku, Kärkkäinen Tommi, Silventoinen Pertti, Andersson Caroline, Tamminen Juha

Acoustics and Ultrasonics

Electrical and Electronic Engineering

LUT School of Energy Systems

Modulation and control methods to reduce zero sequence current in open-end winding motors

2017

Publication type

A4 Conference proceedings

Author(s)

Korhonen Juhamatti, Honkanen Jari, Kärkkäinen Tommi, Nerg Janne, Silventoinen Pertti

Output Stage Capacitor Aging Detection of Grid Connected Isolating DC-DC Converter

2017

Publication type

A4 Conference proceedings

Author(s)

Hannonen Janne, Honkanen Jari, Ström Juha-Pekka, Kärkkäinen Tommi, Korhonen Juhamatti, Silventoinen Pertti, Räisänen Samuli, Sankala Arto

Capacitor Aging Detection in DC-DC Converter Output Stage

2016

Publication type

A1 Journal article (refereed), original research

Author(s)

Hannonen Janne, Honkanen Jari, Ström Juha-Pekka, Kärkkäinen Tommi, Räisänen Samuli, Silventoinen Pertti

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

Control and Systems Engineering

Engineering (miscellaneous)

LUT School of Energy Systems

Fatigue detection for power electronics modules based on acoustic emissions

2016

Publication type

H1 Granted patent

Author(s)

Mengotti Elena, Riedel Gernot, Kärkkäinen Tommi, Talvitie Joonas, Kuisma Mikko

Acoustic Emission Caused by the Failure of a Power Transistor

2015

Publication type

A4 Conference proceedings

Author(s)

Kärkkäinen Tommi, Talvitie Joonas, Kuisma Mikko, Silventoinen Pertti, Mengotti Elena

Acoustics and Ultrasonics

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

Engineering (miscellaneous)

LUT School of Energy Systems

Amplifier errors in dry bacteriorhodopsin sensor measurements

2015

Publication type

A4 Conference proceedings

Author(s)

Talvitie Joonas, Tukiainen Teemu, Lensu Lasse, Karkkainen Tommi, Silventoinen Pertti, Kuisma Mikko

Capacitor Aging Detection in DC-DC Converter Output Stage

2015

Publication type

A4 Conference proceedings

Author(s)

Hannonen Janne, Honkanen Jari, Ström Juha-Pekka, Kärkkäinen Tommi, Silventoinen Pertti, Räisänen Samuli

Measurement challenges in acoustic emission research of semiconductors

2015

Publication type

A4 Conference proceedings

Author(s)

Tommi Kärkkäinen, Joonas Talvitie, Mikko Kuisma, Pertti Silventoinen, Elena Mengotti

Instrumentation

Energy Engineering and Power Technology

Electrical and Electronic Engineering

LUT School of Energy Systems

Validation of a time-variant electrical equivalent circuit for a dry bacteriorhodopsin sensor

2015

Publication type

A4 Conference proceedings

Author(s)

Talvitie Joonas, Tukiainen Teemu, Lensu Lasse, Kärkkäinen Tommi, Silventoinen Pertti, Kuisma Mikko

Acoustic Emission in Power Semiconductor Modules—First Observations

2014

Publication type

A1 Journal article (refereed), original research

Author(s)

Kärkkäinen Tommi, Talvitie Joonas, Kuisma Mikko, Hannonen Janne, Ström Juha-Pekka, Mengotti Elena, Silventoinen Pertti

Acoustics and Ultrasonics

Electrical and Electronic Engineering

Safety, Risk, Reliability and Quality

LUT School of Energy Systems

Slow and Steady Wins the Race? Energy Consumption Analysis of an EV Competition

2014

Publication type

A4 Conference proceedings

Author(s)

Kärkkäinen Tommi, Kuisma Mikko, Talvitie Joonas, Ström Juha-Pekka, Silventoinen Pertti

Renewable Energy, Sustainability and the Environment

LUT School of Energy Systems

Sounds from semiconductors - Acoustic emission experiment with a power module

2014

Publication type

A4 Conference proceedings

Author(s)

Kärkkäinen Tommi, Talvitie Joonas, Ikonen Oskari, Kuisma Mikko, Silventoinen Pertti, Mengotti Elena

Electrical and Electronic Engineering

Engineering (miscellaneous)

LUT School of Energy Systems

Considerations for active condition monitoring in power electronic converters

2013

Publication type

A4 Conference proceedings

Author(s)

Kärkkäinen Tommi, Silventoinen Pertti

Electrical and Electronic Engineering

LUT School of Energy Systems

Designing an Energy Measurement System for an Electric Vehicle Competition - From a Student Project to a Successful Race

2013

Publication type

A4 Conference proceedings

Author(s)

Talvitie Joonas P., Kärkkäinen Tommi J., Koskinen Jari, Niukkanen Manu,
Ström Juha-Pekka, Silventoinen Pertti, Kuisma Mikko

Engineering

LUT School of Energy Systems

IGBT phase leg non-idealities in active du/dt output filtering

2013

Publication type

A4 Conference proceedings

Author(s)

Tyster Juho, Kärkkäinen Tommi, Ström Juha-Pekka, Korhonen Juhamatti, Silventoinen Pertti

Electrical and Electronic Engineering

LUT School of Energy Systems

Necessity of Active Condition Monitoring in Power Electronic Converters

2013

Publication type

A4 Conference proceedings

Author(s)

Kärkkäinen Tommi, Silventoinen Pertti

Electrical and Electronic Engineering

LUT School of Energy Systems

Time-variant electrical equivalent circuit of a dry bacteriorhodopsin sensor

2013

Publication type

A4 Conference proceedings

Author(s)

Talvitie Joonas, Tukiainen Teemu, Lensu Lasse, Kärkkäinen Tommi, Silventoinen Pertti, Kuisma Mikko

Electrical and Electronic Engineering

LUT School of Energy Systems

Ground fault detection method for three phase inverters based on the third harmonic

2011

Publication type

A4 Conference proceedings

Author(s)

Kärkkäinen Tommi, Rauma Kimmo, Silventoinen Pertti

Electrical and Electronic Engineering

LUT School of Energy Systems

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Keywords

electronics, reliability of electronics

Tommi Kärkkäinen

Biography

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Researcher profiles

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