| 摘要 |
In a predetermined operating state of an electric motor (3) of an axial air-gap type, control is carried out as follows. A phase difference between an electric current supplied to an armature winding (13a) of one of the stators (12a) and an electric current supplied to an armature winding (13b) of the other stator (12a) is set so as to suppress a variation in an output torque of the electric motor (3), / and electric currents having the phase difference are supplied to the armature windings (13a, 13b) of the stators (12a, 12b). In an operating state other than the predetermined operating state, an electric current supplied to the armature winding (13a) of the one of the stators (12a) and an electric current supplied to the armature winding (13b) of the other stator (12b) are in a same phase. With this configuration, a variation in output torque can be suppressed only in an operating state where the variation in output torque of the electric motor is to be suppressed, and the output torque and the energy efficiency of the electric motor (3) can be enhanced sufficiently in the other operating states. |
