1. Lipetsk State Technical University,Department of Electric Drive,Lipetsk,Russian Federation
2. Kazan State Power Engineering University,Department of Power Supply of Industrial Enterprises,Kazan,Russian Federation
3. University of Namibe,Department of Electrical Engineering FET,Namibe,Angola
4. University of Palermo,Department of Engineering,Palermo,Italy
5. UNINOVA – CTS and LASI NOVA University Lisbon,NOVA School of Science and Technology,Caparica,Portugal,2829-516