A method for manufacturing a rotor for devices having a magnetically levitated rotor includes providing an impeller configured to be magnetically levitated, has and having a magnetically active core, is the magnetically active core completely enclosed by a sheathing, the sheathing comprising a plastic, and at least one impeller element configured to interact with substances is provided on the sheathing, providing a magnetization device to demagnetize or magnetize the magnetically active core, the magnetization device comprising a receptacle into which the impeller or the rotor is capable of being inserted, inserting the impeller into the receptacle and demagnetizing the magnetically active core, separating the magnetically active core from the sheathing, attaching an encapsulation to the magnetically active core, the encapsulation comprising a plastic and completely enclosing the magnetically active core, and attaching at least one conveyor element to the encapsulation.

A method for manufacturing a rotor for devices having a magnetically levitated rotor includes providing an impeller configured to be magnetically levitated, has and having a magnetically active core, is the magnetically active core completely enclosed by a sheathing, the sheathing comprising a plastic, and at least one impeller element configured to interact with substances is provided on the sheathing, providing a magnetization device to demagnetize or magnetize the magnetically active core, the magnetization device comprising a receptacle into which the impeller or the rotor is capable of being inserted, inserting the impeller into the receptacle and demagnetizing the magnetically active core, separating the magnetically active core from the sheathing, attaching an encapsulation to the magnetically active core, the encapsulation comprising a plastic and completely enclosing the magnetically active core, and attaching at least one conveyor element to the encapsulation.

A laminated iron core manufacturing apparatus for laminating a plurality of punched members obtained by punching a plate-shaped member, including: a convey unit conveys the plate-shaped member; a lifter supports the plate-shaped member; a liquid material supply unit adheres a liquid material to regions to be the punched members of one main surface of the plate-shaped member; and a punching unit to punches the plate-shaped member after the liquid material is applied to form the punched members. The liquid material supply unit adheres the liquid material to the plate-shaped member while avoiding, in the regions to be the punched members in the plate-shaped member, a contact region where the lifter on a downstream side of an adhesion location of the liquid material in the liquid material supply unit and on an upstream side of the punching unit comes into contact with the plate-shaped member.

A laminated iron core manufacturing apparatus for laminating a plurality of punched members obtained by punching a plate-shaped member, including: a convey unit conveys the plate-shaped member; a lifter supports the plate-shaped member; a liquid material supply unit adheres a liquid material to regions to be the punched members of one main surface of the plate-shaped member; and a punching unit to punches the plate-shaped member after the liquid material is applied to form the punched members. The liquid material supply unit adheres the liquid material to the plate-shaped member while avoiding, in the regions to be the punched members in the plate-shaped member, a contact region where the lifter on a downstream side of an adhesion location of the liquid material in the liquid material supply unit and on an upstream side of the punching unit comes into contact with the plate-shaped member.

Equipment for welding a motor stator to a substrate includes a protective hood and a hot pressing head. The protective hood covers the motor stator and the substrate to protect the motor stator from undesired displacing and possible damage, and is provided with a plurality of wire slots, via which lead-out wires of coil windings of the motor stator can be pulled out to expose from the protective hood. The hot pressing head has a hot pressing end corresponding to welding points on the substrate and is movable to cover an outer side of the protective hood while the hot pressing end heats and welds the lead-out wires and the welding points together. With the equipment, all the coil windings of the motor stator can be welded to the substrate in one single movement while the motor stator is protected against splattered solders during the welding operation.

A method for welding a motor stator to a substrate includes steps of: providing a motor stator and a substrate; preliminarily fixing the motor stator to the substrate; pulling out lead-out wires of coil windings wound on the motor stator to align with solders of welding points on the substrate; covering a protective hood on the motor stator; covering the hot pressing head around the protective hood while the hot pressing end is located corresponding to the welding points; heating and compressing the welding points to melt the solders; and waiting the molten solders on the welding points to cool and cure to weld the coil windings of the motor stator to the welding points. With the present invention, all the coil windings of the motor stator can be welded to the substrate in one single movement while the motor stator is protected against splattered solders during the welding operation.

Embodiments of the present invention are directed to an apparatus for inserting an undulated coil assembly in a plurality of slots of a hollow core of a stator of a dynamoelectric machine. In some embodiments, the hollow core includes a hollow core central rotation axis, the undulated coil assembly is formed by a plurality of undulated coils, and each of the plurality of undulated coils including adjacent superimposed linear portions (LI). At least three of the plurality of undulated coils extend parallel to each other and a plurality of turn portions (T) connecting the adjacent linear portions (LI) thereof. The apparatus includes, inter alia, a support member, a first guide device aligned with respect to each of the end faces and the plurality of slots of the hollow core, a passage associated with the first guide device which includes at least one guide surface, a feeder that feeds the first coil portion, and moving means for relatively moving the hollow core with respect to the first guide device to position the plurality of slots of the hollow core for receiving the superimposed linear portions (LI).

Embodiments of the present invention are directed to an apparatus for inserting an undulated coil assembly in a plurality of slots of a hollow core of a stator of a dynamoelectric machine. In some embodiments, the hollow core includes a hollow core central rotation axis, the undulated coil assembly is formed by a plurality of undulated coils, and each of the plurality of undulated coils including adjacent superimposed linear portions (LI). At least three of the plurality of undulated coils extend parallel to each other and a plurality of turn portions (T) connecting the adjacent linear portions (LI) thereof. The apparatus includes, inter alia, a support member, a first guide device aligned with respect to each of the end faces and the plurality of slots of the hollow core, a passage associated with the first guide device which includes at least one guide surface, a feeder that feeds the first coil portion, and moving means for relatively moving the hollow core with respect to the first guide device to position the plurality of slots of the hollow core for receiving the superimposed linear portions (LI).

Disclosed are a laminated core and a method for manufacturing the same. The laminated core includes first layers arranged spaced apart and comprising a plurality of first segments; first protrusions having embossed shape on the first layers and configured to form a plurality of first fixing columns to couple the first layers in succession; and at least one second layers provided between the first layers and comprising a plurality of second segments, wherein a boundary of the first segments is staggered from a boundary of the second segments, the second layers are provided with first holes through which the first fixing columns pass, and the first protrusions are connected in a row by press fitting in a protruding direction to form the first fixing column. The parallelism, perpendicularity, and flatness of the laminated core may be improved, bending of the lamina segments and crushing of protrusions may be remedied, and the number of layers fixed to one protrusion may be changed depending on the protruding height of the protrusion.

Disclosed are a laminated core and a method for manufacturing the same. The laminated core includes first layers arranged spaced apart and comprising a plurality of first segments; first protrusions having embossed shape on the first layers and configured to form a plurality of first fixing columns to couple the first layers in succession; and at least one second layers provided between the first layers and comprising a plurality of second segments, wherein a boundary of the first segments is staggered from a boundary of the second segments, the second layers are provided with first holes through which the first fixing columns pass, and the first protrusions are connected in a row by press fitting in a protruding direction to form the first fixing column. The parallelism, perpendicularity, and flatness of the laminated core may be improved, bending of the lamina segments and crushing of protrusions may be remedied, and the number of layers fixed to one protrusion may be changed depending on the protruding height of the protrusion.