Double-stator motor having various configurations for inner and outer windings

摘要

A double-stator motor of an example embodiment includes: an annular rotor connected to a rotary shaft and integrally rotates with the rotary shaft, an inner stator arranged radially inward of the rotor, and an outer stator arranged radially outward of the rotor. The rotor includes a plurality of segments annularly arranged in the circumferential direction, spaced apart from each other by a predetermined distance, and a plurality of permanent magnets each interposed between circumferentially adjacent segments, the permanent magnets being alternately magnetized in the circumferentially opposite direction. The rotor, the inner stator and the outer stator have the same number of poles. The inner and outer stator windings of the inner and outer stators, respectively, are connected so that their phases are reversed to each other. Thus, the magnetic fields generated by the magnetomotive forces of the inner and outer stators are applied to specific segments in parallel.

主权项

1. A double-stator motor comprising:
an annular rotor connected to a rotary shaft and integrally rotates with the rotary shaft; an inner stator arranged radially inward of the rotor; an outer stator arranged radially outward of the rotor; a plurality of segments annularly arranged in the circumferential direction in the rotor, being spaced apart from each other by a predetermined distance; and a plurality of permanent magnets each of which is interposed between circumferentially adjacent segments, and the permanent magnets are alternately magnetized in the circumferentially opposite direction; wherein the inner stator includes an inner stator core having a plurality of slots which are open in an outer periphery thereof, and a three-phase inner stator winding wound about the inner stator core through the plurality of slots; the outer stator includes an outer stator core having a plurality of slots which are open in an inner periphery thereof, and a three-phase outer stator winding wound about the outer stator core through the plurality of slots; the rotor, the inner stator and the outer stator have the same number of poles; the inner and outer stator windings of the inner and outer stators are mutually connected so that their phases are reversed to each other in order that the magnetic fields generated by the magnetomotive forces of the inner and outer stators are applied to specific segments in parallel; the number of slots of the inner stator core of the inner stator is equal to the number of slots of the outer stator core of the outer stator; the inner and outer stator windings have their in-slot conductors accommodated in the slots; and the number of in-slot conductors of the inner stator winding is smaller than the number of in-slot conductors of the outer stator winding.