^pof;
Electrical;
Engineering,;
School;
of;
Electrical;
Engineering,;
Aalto;
University,;
Espoo;
00076,;
Finland;
^pof;
Electrical;
Power;
and;
Machines;
Engineering,;
Faculty;
of;
Engineering,;
Zagazig;
University,;
Zagazig,;
Sharqia,;
PO;
Box;
44519,;
Egypt;