Slotless motor
AssigneeKabushiki Kaisha Toshiba
InventorsSadayoshi Hibino, Motoyasu Mochizuki, Yoshinobu Nakamura
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Abstract
A slotless motor has a sufficiently small gap between a stator and a rotor, and improves characteristics of the torque and the power factor. Accordingly, the slotless motor comprises stator cores having no slots, coils forming revolving magnetic fields in the stator cores, and rotors having a permanent magnet. The coils are disposed along the stator cores cylindrically and constructed in one layer. Each of the coils forms a part which decreases the distribution of the number of turns in the direction of a diameter of the stator cores, and adjoining coils pile on each other at the part in the direction of the diameter of the stator cores. The distribution changes in response to a predetermined range.
Claims13
A slotless motor having stator cores comprising:
- a plurality of coils cylindrically disposed along the stator cores, each coil having a formed part which decreases a number of turns of the coil in the direction of a diameter of the stator cores, and adjoining coils piled on each other at the formed part in the direction of the diameter of the stator cores;
- a stator having m phases and p poles;
- the plurality of coils being a product of multiplying m by p;
- and
- the coils being arranged in order in a circumferential direction of the stator cores in (2.pi./p) degrees in mechanical angles along the stator cores cylindrically.
A slotless motor comprising:
- a cylindrical stator core;
- and
- a plurality of coils of different phases cylindrically disposed along the stator core;
- a stator having m phases and p poles;
- the plurality of coils being a product of multiplying m by p;
- and
- the coils being arranged in order in a circumferential direction of the stator core in (2.pi./p) degrees in mechanical angles along the stator core cylindrically;
- wherein a portion of each coil has a thickness of winding in a radial direction which decreases as the coil extends in the circumferential direction of the stator core;
- and
- wherein the coils of different phases overlay respectively.
Dependencies are inferred from the claim text.