High Winding Factor Model of a Motor with Two Controllable Rotors

Most of electric machines have been fitted with a number of electric motors and their inverters. In order to reduce the space of the motors and inverters, we proposed a motor with two independently controllable rotors using a 6-phase inverter. However, winding factors of 3- and 6-phase rotors were 0.87 and 0.50, respectively, in a conventional winding arrangement. In order to increase the winding factor of the motor, this paper proposes a novel winding arrangement, and its effectiveness is verified using finite element analysis.