A stator includes a plurality of core constituent members arranged side by side in a circumferential direction, each of which has a tooth extending in a radial direction and a pair of core outer extension portion extending in the both circumferential directions from a radial outer end portion of the tooth, and an insulator covering at least a part of the tooth, and a coil wound around the tooth via the insulator. The coil includes a terminal inner coil having a terminal line which is drawn from the radially inner side to the one axial side. The insulator covers the tooth that are circumferentially adjacent to the tooth around which the terminal inner coil is wound. The insulator has a restriction portion so as to restrict the movement of the terminal line of the terminal inner coil.

Metal laminate cores can be assembled with laser pin welding through a thickness of a first laminate into a second laminate and successively laser pin welding a plurality of second laminates, ending with a third laminate to form the core stack. The laser pin welds are located within an outer perimeter of one or more of the laminates. Such laminated cores are often utilized in electrical motors, generators, transformers, lighting and other applications. The laser pin welds can be selectively provided under the control of a processor to index about the parts and/or change in intensity or even skip certain parts so as to be able to begin and end cores for some embodiments while also facilitating manual and/or automated stacking/welding embodiments and/or relative rotation of the cores.

Disclosed are axial-gap electrical machines which magnetic core elements are made of wound magnetic ribbons to provide relatively lightweight and small size implementations that can be operated in a wide range of operational modes with minimized magnetic and electrical losses. The axial-gap electrical machine includes a cylindrically-shaped stator assembly having a central passage passing therealong, a rotatable shaft passing within the central passage of the stator assembly coaxial to the axis of rotations of the electric machine, and one or two annular rotor assemblies concentrically attached to the shaft and magnetically coupled to the at least one cylindrically-shaped stator assembly. The stator assembly can have a plurality of prism-shaped magnetic core elements made from a plurality of magnetic ribbon layers extending along its length, and a primary winding comprising a plurality of coils mounted over the prism-shaped magnetic core elements.

a stator core, a bobbin fixed on the stator core, and a plurality of windings wound on the bobbin, characterized in that the stator further comprises an elastic member with one end fixed onto the insulating frame, the other end of the elastic member is resisted against and thereby forcing the bobbin to axially position the stator.

An axial gap motor stator core includes a yoke portion made up of a metallic plate member or the like and including a lock portion and a tooth portion constituting a dust core including a lower surface which is a locking target to be locked on the lock portion. An axial gap motor stator core manufacturing method includes forming a yoke portion including a plurality of lock portions, which are projecting portions, by pressing, for example, a metallic plate member and fixing the tooth portion to the yoke portion by inserting the lock portions into the tooth portion.

The present invention relates to a method for producing a pole core (1), comprising the following method steps: providing a magnetic workpiece (10), which has a first side (11) and a second side (12), the first side (11) having a groove (15) directed toward the second side (12); inserting at least two inserts (20) and at least one bonding means (25) into the groove (15), the at least one bonding means (25) being arranged between the two inserts (20); and integrally bonding the at least two inserts (20) to each other and/or the at least two inserts (20) to the workpiece (10).

A stator includes a yoke extending in a circumferential direction about an axis line, a tooth extending from the yoke in a first direction toward the axis line, and a coil wound around and fixed to the tooth. The yoke has an inner wall surface facing the axis line. The tooth has a root part connected to the yoke. The inner wall surface of the yoke is a flat surface extending from an end of the root part of the tooth in the circumferential direction to an inner circumferential side relative to a plane passing through the end and perpendicular to the first direction.

A core piece that is circularly arranged to construct a stator core of an axial gap type rotary electric machine includes: a first member in a column form extending in an axial direction of the stator core; a second member in a plate form disposed on a first end side of the axial direction in the first member; and a third member in a plate form disposed on a second end side of the axial direction in the first member, the first member has a peripheral surface connecting with the second member and the third member, the second member has a protruding portion projecting outwardly from the peripheral surface of the first member, the third member has a protruding portion projecting outwardly from the peripheral surface of the first member, and the first member, the second member, and the third member are configured by an integrally molded green compact.

A punch processing method for a laminated iron core includes sequentially feeding the steel sheets to a mold; and performing a plurality of processes in the mold, the plurality of processes includes fixing the steel sheets being stacked to each other at a first fixing part that is positioned outside a closed curved line corresponding to an outermost periphery of the laminated iron core and a second fixing part that is positioned in a portion that finally serves as the laminated iron core; and performing punch processing on the outermost periphery of the laminated iron core while the steel sheets are stacked.

The present invention relates to an electric motor, a cleaner having same and an electric motor manufacturing method. The electric motor of the present invention comprises: a stator; and a rotor which is rotatable with respect to the stator. The stator has: a stator core; and a stator coil which is wound around the stator core. The stator core has: a yoke which is segmented in the circumferential direction of the stator; an assembly connector which is coupled between two yokes which are continuously disposed along the circumferential direction of the stator; and teeth which protrude along the radial direction of the stator from the inner surface of the assembly connector. Accordingly, deformation of the yoke and the teeth, respectively, may be suppressed.