A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.

An apparatus for assembling a permanent magnet motor rotor includes a first-end positioning assembly, a plurality of connectors, and a second-end positioning assembly. The first-end positioning assembly is utilized to fix a first-end rotor core. The second-end positioning assembly is utilized to fix a second-end rotor core. The connectors are utilized to connect and fix the first-end positioning assembly with the second-end positioning assembly. Each first longitudinal axis of each first positioning element of the first end positioning assembly is different from each second longitudinal axis of each second positioning element of the second end positioning assembly. In addition, a method for assembling a permanent magnet motor rotor is also provided.

A rotor manufacturing method is a method that allows magnetized magnets inserted in second magnet holes of a second rotor core to be inserted, while retaining magnetism, into first magnet holes of a first rotor core. This method includes a placing step of placing the second rotor core on a first end surface, in a stack thickness direction, of the first rotor core such that the second magnet holes overlap the first magnet holes, and an extruding step of extruding the magnetized magnets from the second magnet holes toward the first magnet holes using a non-magnetic jig.

A method of manufacturing a rotor for a rotating electric machine. The rotor includes a rotor core and at least one magnet fixed in at least one magnet fixing portion provided in the rotor core. The method includes: (a) placing the at least one magnet and at least one fixing member in the at least one magnet fixing portion such that each of the at least one fixing member is positioned between a corresponding one of the at least one magnet fixing portion and a corresponding one of the at least one magnet; and (b) applying an electric current to the at least one magnet to heat the at least one fixing member by heat generated by an electrical resistance of the at least one magnet, and fixing the at least one magnet to the at least one magnet fixing portion through the heated at least one fixing member.

A method of manufacturing a rotating body includes disposing an end plate on an end surface of the core body in a height direction, and forming the rotating body by welding the end plate and the core body together. The rotating body is formed by welding the end plate and the core body together while a temperature of the core body and the end plate is within a predetermined operational a temperature range associated with rotation of the rotating body in a manufactured state of operation.

In a method for producing a material layer with a layer thickness between 0.5 and 500 μm, a suspension with a binding agent and solid particles is applied through a template onto a base area for obtaining a green body. The binding agent is driven out of the green body and a permanent cohesion of the solid particles is created by heating and/or by compaction.

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.

An apparatus for assembling a permanent magnet motor rotor includes a first-end positioning assembly, a plurality of connectors, and a second-end positioning assembly. The first-end positioning assembly is utilized to fix a first-end rotor core. The second-end positioning assembly is utilized to fix a second-end rotor core. The connectors are utilized to connect and fix the first-end positioning assembly with the second-end positioning assembly. Each first longitudinal axis of each first positioning element of the first end positioning assembly is different from each second longitudinal axis of each second positioning element of the second end positioning assembly. In addition, a method for assembling a permanent magnet motor rotor is also provided.

A device for bending a plurality of winding segments to form a winding of a winding carrier of an electric machine is provided. The device includes: a holding device designed for holding in place the winding carrier in which the winding segments are arranged; a main bending device, including a number of main locking elements, which point towards the holding device, are arranged along first sections of a circumferential line and are designed to lock exposed end sections of first winding segments; and a partial bending device, including a number of partial locking elements, which point towards the holding device, are arranged along second sections of the circumferential line and are designed to lock exposed end sections of second winding segments. The holding device on the one hand and the main bending device and the partial bending device on the other hand are rotatable relative to each other.

A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.