1. Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, Maarintie 8, 02150 Espoo, Finland
2. Efficient Powertrain Solutions (EPS), School of Technology and Innovations, University of Vaasa, Yliopistonranta 10, 65200 Vaasa, Finland
3. Engine Research and Technology Development, Wärtsilä Marine Solutions, 65170 Vaasa, Finland