1. University of West Bohemia,Dept. of Power Electronic and Machines,Pilsen,Czech republic
2. Energoprojekt Praha UJV Rez, a.s.,Prague,Czech republic
3. University of West Bohemia,Regional Innovation Centre of Elektrotechnic,Pilsen,Czech republic
4. University of Zilina,Dept. of Mechatronic and Electronic,Zilina,Slovakia