%0 Conference Proceedings %T Variable structure direct torque control of encoderless synchronous reluctance motor drives with maximized efficiency %A Abootorabi Zarchi, Hossein %A J. Soltani %A Gh. R. Arab Markadeh %A M. Fazeli %A A. Kh. Sichani %J Industrial Electronics (ISIE), 2010 IEEE International Symposium on %D 2010