Patent ID: 11955864
Assignee: OKUMA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A linear motor, comprising:
a stator including a plurality of salient poles arranged at regular intervals in a predetermined travel direction; and
a mover movable in the travel direction and facing the stator in a facing direction orthogonal to the travel direction, wherein
the mover includes
a plurality of teeth arranged in the travel direction,
three-phase alternate current windings wound around the teeth,
a mover magnetic yoke that connects the plurality of teeth extending from an edge of the mover magnetic yoke in the facing direction,
permanent magnets each extending from the edge of the mover magnetic yoke in the facing direction and disposed in a gap between the teeth of identical phase, and
magnetic flux barriers each embedded near the base of each tooth of the plurality of teeth, disposed completely within a width of each tooth in the travel direction, and spaced apart from the permanent magnet in the travel direction,

wherein the magnetic flux barriers are disposed across the mover magnetic yoke and the teeth so that a portion of the magnetic flux barrier overlaps the mover magnetic yoke and a remaining portion of the magnetic flux barrier overlaps the teeth, and
wherein the magnetic flux barriers have a dimension in the travel direction that is smaller than a dimension of the teeth in the travel direction.