A method for manufacturing a laminated iron core includes providing a plurality of annular iron core piece rows, each of which is configured by annularly arranging a plurality of divided iron core pieces including yokes and teeth, and the yokes of the annularly-adjacent divided iron core pieces in the annular iron core piece row are mutually different in shape. In the method, the annular iron core piece rows are laminated by changing a rotational angle of the newly laminated annular iron core piece row relatively to the lastly laminated annular iron core piece row laminated so that the divided iron core piece with a shape different from that of the divided iron core piece is laminated on the lastly laminated divided iron core piece.

A translation motor includes a flat stator that defines a stator plane and has an upper face and a lower face. An active translation rotor is linearly displaceable relative to an X-axis along the stator plane. The upper face includes a toothed structure arranged linearly with respect to the X-axis and is defined by stator teeth and stator tooth spaces. The flat stator is defined by a stamping-shaped planar stator material and has a die side that is an elevated side and a punch side that is a recessed side. The die side has elevations that define the stator teeth. The die side defines the upper face and the punch side defines the lower face.

A stator includes a stator core having a core back in an annular shape about an axis, and a nonmagnetic mold resin part surrounding the stator core from outside in a radial direction about the axis. The stator core has a core-back gap passing in the radial direction through at least a part of the core back in a circumferential direction about the axis. The mold resin part reaches an inner side of the core back in the radial direction from an outer side of the core back in the radial direction through the core-back gap.

A rotor of a synchronous reluctance motor may include: a plurality of laminations forming a stack, each lamination including: two parallel surfaces and a perimeter that define the lamination and a direction of stacking the laminations that is perpendicular to the parallel surfaces, the lamination at least partially filled with a magnetically soft electrical conductor and at least one cavity encircled by the conductor and extending from a first to a second surface of the two parallel surfaces, the conductor forming at least one bridge at the perimeter of the lamination from one side of the at least one cavity to another side of the at least one cavity. A value of a magnetic property and a value of a mechanical property of the at least one bridge differs from a value of the magnetic property and a value of the mechanical property of the conductor material.

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 brushless direct current motor includes a rotor made up of at least one permanent magnet and a stator having at least three partitions radially extending from a circular based cylindrical main body, the partitions together defining at least two volumes for receiving at least three coils generating a magnetic field, wherein each volume is closed by a wall connecting the partitions, and in that the wall comprises, on the face thereof oriented toward the rotor, at least one magnetic restriction zone. A sleeve surrounds the stator and the rotor and has at least one deformation zone formed by cutouts adapted to maintain the external geometrical configuration of the sleeve when mounting the constituent elements of the motor. A method for manufacturing such a motor.

A stator is improved in work efficiency of mounting to a stator core is provided. The stator includes insulators sandwiching the stator core therebetween. The stator core includes a plurality of teeth that radially projects. Each of the insulators includes a plurality of tooth covering portions that radially projects. The tooth covering portions cover the teeth. In a facing portion of one of the insulators facing the stator core, a peripheral portion projects more than a center portion. In a facing portion of the other of the insulators facing the stator core, a center portion projects more than a peripheral portion.

An electric motor is provided that has a stator and a rotor rotatably mounted in the stator. The stator includes a plurality of motorettes, each having a ferrous metal core segment, and a conductive winding on the core segment. The plurality of motorettes are arranged in a circular arrangement, and a plurality of wedges are provided, with one of the wedges being positioned in each interface between the conductive windings of adjacent ones of the motorettes that presses the conductive windings of the adjacent ones of the motorettes towards respective ones of the ferrous metal core segments. This provides an arrangement with minimal or no air gaps between the conductive windings and the core segments, or an electric insulator on each of the core segments.

The disclosure relates to a method for designing a stator segment for a stator of an m-phase synchronous reluctance machine with concentrated windings, the stator being divided into a stator segment or a plurality of stator segments and comprising a ferromagnetic base body with peripherally distributed tooth structures and a winding system mounted in the base body, which comprises, per stator segment, z tooth structures and a number of winding phases (U, V, W) corresponding to the number of phases m, each of said winding phases comprising a series connection and/or a parallel connection of a plurality of the concentrated windings, a rotor of the synchronous reluctance machine comprising a pole number p in a peripheral section corresponding to the stator segment.

A stator of an electric motor comprises a pole chain, which is made of a stack of a plurality of straight transformer sheets and rounded to a circular configuration by bending the stacked transformer sheets, wherein the pole chain has a plurality of pole portions each comprising a pole tooth; a plurality of winding cores attached to the respective pole teeth for accommodating coils of a three-phase winding comprising wires; wherein the wires of respective phases of the three-phase winding are routed spatially separated from each other and without mutual contact at an axial end surface of the pole chain between and along adjacent winding cores around the pole chain; and wherein the wires are supported and guided such that their positions relative to the pole chain are substantially maintained when the pole chain is rounded from its straight configuration to its circular configuration.