A method for producing a magnet plate for a linear motor is provided. The magnet plate comprises a base plate and a plurality of magnets juxtaposed to one another on a surface of the base plate. The method comprises providing the plurality of magnets on a surface of the base plate at a certain interval, placing the base plate into a mold, supplying a resin material into the mold, so as to form a resin molding covering the plurality of magnets on the surface of the base plate by means of injection molding, and magnetizing the plurality of magnets.

A method for manufacturing a laminated iron core product includes laminating a plurality of iron core members which are punched from a first metal plate to form a laminate, removing oil adhering to the laminate, removing oil adhering to an end surface plate which is punched from a second metal plate, and disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate.

A method of fabricating a curvilinear magnet includes forming at least one slot in a material billet. The slotted material billet is inserted into a mold having a curvilinear pocket. The mold is closed around the slotted material billet such that the slotted material billet conforms to the curvilinear pocket and forms a curvilinear billet. The curvilinear billet is arranged in a structure. The curvilinear billet arranged in the structure is then magnetized.

A method for manufacturing a rotor including a rotor core and a permanent magnet, the rotor core having a magnet hole, and the permanent magnet being inserted in the magnet hole and fixed to the rotor core with an adhesive, including the steps of: applying the adhesive, inserting the permanent magnet into the magnet hole of the rotor core, volatilizing the diluting solvent, expanding the expanding agent, and fixing the permanent magnet to the rotor core.

A method for manufacturing a neutral ring includes connecting a cut-off neutral ring to an arc-shaped connection element. The method also includes filling an insulator between the cut-off neutral ring and a connection element. The neutral ring shunts the rotor coil in three phases.

A manufacturing method for a rotor core included in a rotor of a motor punches an electromagnetic steel sheet includes punching a plurality of plates for rotor core from an electromagnetic steel sheet; producing a rotor-core precursor by stacking up the plates for rotor core; manufacturing a rotor core by annealing an outer circumferential region of the rotor-core precursor at a first predetermined temperature, and annealing an inner circumferential region of the rotor-core precursor at a second predetermined temperature; the first predetermined temperature being a temperature at which grain growth of crystals of the electromagnetic steel sheet is promoted; and the second predetermined temperature being a temperature at which grain growth of the crystals of the electromagnetic steel sheet is not promoted.

Methods and apparatus are disclosed for assembling a motor rotor. The apparatus includes a rotor fixing module, a conductive bar driving module, a plurality of conductive bars and a pump module. The rotor fixing module supports and holds the rotor. The conductive bar driving module has a plurality of assembling slots. When the pumping module is attached to the conductive bar driving module and each of the conductive bars seals the assembling slots, the pumping module and the assembling slots cooperatively form a sealed chamber, and the pumping module vacuums the sealed chamber to generate a suction force on each of the conductive bars, and the suction force further drives the conductive bars into the assembling slots. The method is for assembling the rotor by utilizing the same procedure mentioned above.

A method for manufacturing a rotor for a slip ring motor, including the steps of: a) arranging a plurality of electric cables inside a hollow shaft, wherein the electric cables are distributed over an inner circumference of the hollow shaft, b) filling a resin into an empty space defined between the hollow shaft and the electric cables, c) arranging a rod inside the hollow shaft thereby displacing the resin into an annular gap between the rod and the hollow shaft, wherein the electric cables are arranged in the annular gap, and d) curing of the resin to form the rotor.

A method of manufacturing a rotor includes mounting a plurality of core members to a shaft in a state by inserting the shaft into a shaft hole that penetrates through the plurality of core members in a height direction. An inner diameter of the shaft hole is larger than an outer diameter of the shaft. The method includes pressing the plurality of stacked core members together in the height direction to form a stack in which the plurality of core members are located adjacent to each other, and the shaft hole is engaged with the shaft.

The disclosed stator or rotor has a distributed wave winding, in which the wires are associated in pairs lying with straight segments in the same slots. Head portions of two successive straight segments of each wire of a pair protrude from opposite ends of slots. For forming two wire groups, a plurality of coil windings are simultaneously created by winding up n parallel wires with intermediate spacing onto a striplike former that is rotatable about its longitudinal axis. From each of the parallel wires one straight segment and one end turn are doubled by being bent over with the wire length of a head portion, and then head portions are formed and the wires interlaced. Finally, the two wire groups are wound onto one another and thereby intertwined with one another, and then introduced as an entire intertwined wave winding strand into the stator or rotor slots.