Permanent magnet motor
AssigneeOkuma Corporation
InventorMasayuki Nashiki
Life of this patent
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Abstract
A permanent magnet motor is provided comprising a plurality of individual permanent magnets 7 threaded inside of a rotor, an N pole magnetic circuit commonly connected to N poles of the plurality of individual permanent magnets 7, an S pole magnetic circuit commonly connected to S poles of the plurality of individual permanent magnets 7, a plurality of N pole magnetic poles 5 positioned on the rotor surface, the N pole magnetic poles 5 being a part of the N pole magnetic circuit, and a plurality of S pole magnetic poles 6 positioned alternately with the N pole magnetic poles 5 in the rotational direction of the rotor, the S pole magnetic poles 6 being a part of the S pole magnetic circuit, wherein the change rate of the rotation of flux linked to the stator winding is increased to output a large torque.
Claims12
A permanent magnet motor having a plurality of phases, the motor comprising:
- stator salient poles of each of the plurality of phases positioned in a stator,
- windings of each phase coiled on each of said stator salient poles,
- a plurality of individual permanent magnets having N poles and S poles alternately threaded to the inside of a rotor,
- a plurality of N pole magnetic poles, one N pole magnetic pole being magnetically connected to each of the N poles of said plurality of individual permanent magnets, and
- a plurality of S pole magnetic poles, one S pole magnetic pole being magnetically connected to each of the S poles of said plurality of individual permanent magnets,
- the plurality of N pole magnetic poles being positioned on the rotor surface and being commonly connected to an N pole magnetic circuit, and
- the plurality of S pole magnetic poles being positioned alternately with said N pole magnetic poles in the rotational direction of the rotor and being commonly connected to an S pole magnetic circuit.
A permanent magnet motor having a plurality of phases, the motor comprising:
- stator salient poles of each of the plurality of phases positioned in a stator,
- windings of each phase coiled on each of said stator salient poles,
- N pole flat rolled magnetic steel sheets and strip having a plurality of N pole magnetic poles salient from an N pole magnetic circuit of a near disc shape at a center to a periphery of the N pole flat rolled magnetic sheets and strip,
- S pole flat rolled magnetic steel sheets and strip having a plurality of S pole magnetic poles salient from a S pole magnetic circuit of a near disc shape at a center to a periphery of the S pole flat rolled magnetic sheets and strip, said S pole flat rolled magnetic steel sheets and strip laminated alternately with said N pole flat rolled magnetic steel sheets and strips in the axial direction of a rotor, and
- a common permanent magnet positioned between said N pole flat rolled magnetic steel sheets and strip and said S pole flat rolled magnetic steel sheets and strip, said common permanent magnet being threaded inside a rotor,
- one of the plurality of N pole magnetic poles being magnetically connected to each of N poles of said common permanent magnet, and one of the plurality of S pole magnetic poles being magnetically connected to each of S poles of said common permanent magnet.
Dependencies are inferred from the claim text.