An exemplary apparatus for impregnating varnish into stator coils of a hairpin winding type stator includes a supporting frame vertically installed on a base frame, a tilting bracket installed upper end portion of the supporting frame to be capable of tilting, a rotary bracket installed on the tilting bracket to be rotatable along a circumferential direction, core chucking members installed on the rotary bracket, inserted into a plurality of bolt engagement hole provided in the stator core, and fixing the stator core to the rotary bracket, a first varnish application unit movably installed on the base frame, and configured to apply the varnish to interior and exterior sides of a crown portion of the stator coils, and a second varnish application unit movably installed on the base frame, and configured to apply the varnish to interior and exterior sides of the welding portion of the stator coils.

Disclosed is an electric machine comprises a resolver which comprises a resolver rotor and a resolver stator, the resolver rotor being assembled by: applying a DC voltage across at least one phase of windings the electric machine to create a static magnetic field by a DC electric current flowing through the at least one phase of windings of the three-phase windings, the static magnetic field forcing a machine rotor to rotate to an angular orientation where an N-S direction of magnets of the machine rotor is aligned with an N-S direction of the static magnetic field and keeping the machine rotor stably in this angular orientation; and pushing the resolver rotor onto a machine shaft in an axial direction in a state that the machine rotor is kept in the angular orientation by the static magnetic field.

Disclosed is an electric machine comprises a resolver which comprises a resolver rotor and a resolver stator, the resolver rotor being assembled by: applying a DC voltage across at least one phase of windings the electric machine to create a static magnetic field by a DC electric current flowing through the at least one phase of windings of the three-phase windings, the static magnetic field forcing a machine rotor to rotate to an angular orientation where an N-S direction of magnets of the machine rotor is aligned with an N-S direction of the static magnetic field and keeping the machine rotor stably in this angular orientation; and pushing the resolver rotor onto a machine shaft in an axial direction in a state that the machine rotor is kept in the angular orientation by the static magnetic field.

A method for recycling at least one magnet of an electric machine. A subassembly having the magnet is disassembled from the electric machine. In the process, the following steps are provided: carrying out a first thermal treatment of the subassembly at a first temperature, mechanical separation of the magnet from the subassembly, and carrying out a second thermal treatment of the magnet at a second temperature, which is higher than the first temperature, for debinding and/or cleaning of the magnet.

A brushless direct current motor, a stator part and its winding method are provided. The stator part includes a stator core and stator windings wound around stator poles. The stator poles and the stator windings are arranged in a one-to-one correspondence with each other. The stator windings are formed by winding a single conductive wire uninterruptedly on the stator poles. Two ends of the conductive wire are connected.

A stator for an electric machine comprises a cylindrical stator core, windings positioned on the stator core, and an end disc positioned an end of the stator core. The stator core defines an inner diameter and an outer diameter. A plurality of slots are formed in the core and extend radially from the inner diameter toward the outer diameter. The windings include in-slot portions, end turns, and at least one jumper. The end disc defines a plurality of slots aligned with the slots of the stator core and at least one dog hole removed from the slots of the end disc. The at least one jumper is bent circumferentially around the dog hole and connects two of the in-slot portions of the windings.

The device includes a flexible member that is in a relaxed, substantially concave configuration before being inserted between two adjacent stator portions, and in an operating, substantially flattened configuration when inserted between two adjacent stator portions in which the flexible member is compressed by the stator portions and the winding coils. The flexible member may be in an inserting, substantially convex configuration for being inserted between the adjacent stator portions.

A method for manufacturing a motor lead cable includes the steps of forming one or more motor leads and placing external armor around the one or motor leads. The step of forming each of the one or more motor leads includes providing an insulated conductor, providing an open capillary tube that has opposing sides that have not been joined together, placing the insulated conductor inside the unclosed capillary tube, approximating the sides of the unclosed capillary tube around the insulated conductor, and welding the sides of the capillary tube together to form a closed capillary tube around the insulated conductor.

An apparatus is provided for winding a laminated core with a magnet coil for an electric motor in which a conductive, insulated coil wire is wound into one or multiple pole tip grooves of a winding surface of the laminated core. The apparatus comprises a holding device, a counter holding device, and one or multiple clamping elements. The holding device is configured to fix the laminated core to be wound during a winding process. The one or multiple clamping elements are configured to fix an insulating paper to one of the one or multiple pole tip grooves.

A number of variations may include at least one mold portion that may define a first cavity, a circular gating system, and at least one sprue. The circular gating system may surround the first cavity and define a continuous in-gate from the circular gating to the first cavity. The at least one sprue and at least one vent may be in fluid communication with the circular gating system and the first cavity.