Steady-State Performance and Stability Analysis of Mixed Pole Machines With Electromechanical Torque and Rotor Electric Power to a Shaft-Mounted Electrical Load. - Ayman S. Abdel-Khalik; Mahmoud I. Masoud; Barry W. Williams; Adel L. Mohamadein; M. M. Ahmed (IEEE Trans. Ind. Electron., 2010)