Flux and winding current balancing control for a medium-frequency six-winding transformer. - Arto Sankala; Juhamatti Korhonen; Janne Hannonen; Juha-Pekka Ström; Pertti Silventoinen; Hannu Sarén; Risto Komulainen; Stefan Strandberg; Nicklas Sodo (IECON, 2014)