A plurality of plate-like magnets are partially bonded at a predetermined interval to an inner circumferential surface of a rotor yoke with a first adhesive via a positioning member for positioning in a radial direction and in an axial direction, and a second adhesive is heat-cured in a state where the positioning member is removed, thus bonding and fixing the plurality of plate-like magnets at a predetermined interval and spaced apart from each other in a circumferential direction.

Disclosed are a glue spreading block, device and method for bonding a motor core, and a glue dot thereof. The glue spreading device includes a glue spreading block for bonding the motor core, where a shape of the glue spreading block can be set based on actual needs, and the glue spreading block is configured to spread glue internally absorbed on a silicon steel sheet when the glue spreading block is in contact with the silicon steel sheet. The glue spreading block for bonding the motor core provided in the present disclosure can spread the glue on the silicon steel sheet by means of printing, which can not only ensure the consistency of a size of glue spots, but also have a long service life, and feature reduced maintenance frequency and simple maintenance, prolonged maintenance cycle and improved production efficiency.

A method for manufacturing a rotor includes controlling a thickness of a rotor core, placing the rotor core on a fixed die or a movable die of a plastic filling device after controlling the thickness of the rotor core, clamping the rotor core by moving the movable die vertically to a clamping position, and filling an insertion hole of the rotor core with a plastic. The clamping of the rotor core includes, when clamping, for the first time, a rotor core of a type different from a rotor core clamped immediately prior, detecting whether the rotor core of the different type is in a clamped state, storing, in a memory, the position of the movable die in the vertical direction at the time when the rotor core is detected to be in the clamped state as the clamping position, and stopping the vertical movement of the movable die.

The present invention is related to a stator core of nanocrystalline material (1) for an axial flux electric machine, which comprises an encapsulated nanocrystalline material, wherein the encapsulation comprises at least two distinct encapsulation materials deposited over the nanocrystalline material. The first encapsulation material comprises a material able to increase the mechanical rigidity of the stator core and the second encapsulation material comprises a material able to increase the thermal exchange capacity of the electric machine.

An assembly for forming windings for electric machines, comprising: a supporting frame, a collection drum which has a central axis of symmetry and is supported on a plane of arrangement of the frame wherein the drum has a plurality of seats arranged according to a predefined distribution; at least one grip element which is configured to pick up at least one electrically conductive element from a delivery station and to move the picked-up element up to the insertion at least of a portion of interest of the element in a seat of the drum.

The assembly comprises means for translation which are configured to translate the drum on the plane of arrangement so as to vary the position of the central axis of the drum on the plane of arrangement.

A method for manufacturing a rotor assembly of an electric engine, comprising: loading a first and second plurality of magnets in a magnet insertion tool, loading a sleeve in the magnet insertion tool, performing a first insertion movement using the magnet insertion tool, wherein the first insertion movement comprises moving one of the first plurality of magnets or the second plurality of magnets in a radial direction of the sleeve, and performing a second insertion movement using the magnet insertion tool, wherein the second insertion movement comprises moving one of the first plurality of magnets or the second plurality of magnets with respect to the sleeve in an axial direction of the sleeve. The radius of the sleeve is expanded in a radial direction during one of the first insertion movement or the second insertion movement.

A method for manufacturing a motor core includes forming multiple blocks, stacking the blocks to form a stacked body, and detecting an identifying portion with a detection device. The forming the blocks includes forming, only in the iron core piece that forms one end face of each block, an identifying portion for identifying the progressive press device that forms that block. The forming, only in the iron core piece that forms one end face of each block, the identifying portion includes forming the identifying portion in a surface of the iron core piece that forms the one end face of the block. The stacking the blocks to form the stacked body includes stacking, to form the stacked body, only the blocks formed by the progressive press device corresponding to the detected identifying portion among the multiple blocks.

An assembly includes a rotor assembly having a rotor stack with an outer rotor diameter and a rotor shaft extending along a rotational axis of the rotor assembly. A mandrel includes an outer mandrel diameter extending between a proximal end and a distal end with a rotor engaging surface at the distal end of mandrel. The outer mandrel diameter includes a first cylindrical portion adjacent the proximal end, a conical portion distal of the first cylindrical portion with a first transitional portion connecting the first cylindrical portion to the conical portion. The assembly also includes a sleeve having an inner sleeve diameter that is less than the outer rotor diameter when in an unexpanded state.

A method of transfer molding a rotor core stack includes assembling a mandrel and a runner plate between a clamp press and a plunger, determining a final clamp press position, a nominal clamp press position, and a nominal plunger position, calculating a height offset, and calculating a normalized position of the plunger. The plunger moves at a first speed until the plunger contacts a liquid polymer within a reservoir located between the runner plate and the plunger. The plunger moves at a second speed until the plunger reaches the normalized position to extrude the liquid polymer in the reservoir through the runner plate and into the rotor core stack. The plunger speed is controlled to maintain a constant pressure between the plunger and the liquid polymer until the liquid polymer transfer finishes and the plunger stops at a final plunger position.

A method to detect variations in a rotor core stack includes measuring a clamp press position of a clamp press and a plunger position of a plunger, determining a nominal position of the clamp press, calculating a height offset of the rotor core stack, calculating a normalized position of the plunger by adding the plunger position and the height offset of the rotor core stack, and analyzing the normalized plunger position to detect variations within the rotor core stack.