A stator structure of a brushless dust collector motor. The stator structure is a separate-type structure, and comprises a left iron core and a right iron core that are detachably connected. The upper end of the left iron core and the upper end of the right iron core extend to form pole shoes, the front edges of the pole shoes are deviated leftwards with the centers of the inner circles of the pole shoes as the benchmarks, chamfers of 30 to 60 degrees are formed, and the rear edges of the pole shoes are provided with fillets. Pole shoe deflection angles need to be arranged according to the structure of the stator iron cores, and the use requirement for the rotating speed of a brushless motor is met. Because the stator iron cores are designed into the separate-type structure, winding processing can be respectively conducted on the left iron core and the right iron core, and afterwards the two iron cores are fixed, so the stator winding process is simplified, the production efficiency is improved, and a paint layer is prevented from being damaged. The left iron core and the right iron core can be connected and fixed by adopting an embedding mode, so the accuracy of the connecting position of the two iron cores is effectively ensured, and the operation stability and reliability of the motor are improved. The stator structure is applicable in high-speed brushless motors and is advantageous in having a high rotating speed, high performance and a small size, and being convenient to carry and energy-saving and the like.

A stator assembly method and stator assembly apparatus in which coils that have slot housed portions and coil ends formed from a conductor are mounted to an annular stator core that includes slots formed between adjacent teeth that extend from a back yoke toward an inner side in a radial direction.

A stator assembly method in which coils that have slot housed portions and coil ends formed from a conductive wire are mounted to an annular stator core that has a plurality of teeth that extend from a back yoke toward an inner side in a radial direction and slots formed between two of the teeth.

A stator for a rotating electric machine includes a laminate stack having a plurality of slots open towards an air gap between the stator and a rotor of the electric machine. A winding includes coils which have turns that pass through the slots of the laminate stack. The turns of the coils are electrically insulated the within the slots from each other and from the laminate stack by a ceramic material.

A stator for an electric motor includes a stator core defining slots within which electrical conductors are disposed. Coolant passages are defined within the slots by means of spacers that support the conductors, in such a manner that liquid coolant flowing in the coolant passages directly contacts the conductors. The spacers can define turbulence generators for causing the coolant to have turbulent flow to increase cooling effectiveness.

The present invention provides a compact winding for multi-phase electric machines. For each phase, a conductor with a specifically shaped overhang portion is provided. All but one of the various overhang portions are provided with a U-bent portion to accommodate a traversing portion of at least one of the other conductors. The width of the U-bent portions differs from phase to phase so that conductors can be inserted into the stator slots in a staggered fashion. A step deformation which has the same shape for all phases, is used for connecting different layers of the winding. Electric contacts to the windings are provided at the overhang portions without deviating from the staggered arrangement of traversing conductor portions.

The present invention provides a compact winding for multi-phase electric machines. For each phase, a conductor with a specifically shaped overhang portion is provided. All but one of the various overhang portions are provided with a U-bent portion to accommodate a traversing portion of at least one of the other conductors. The width of the U-bent portions differs from phase to phase so that conductors can be inserted into the stator slots in a staggered fashion. A step deformation which has the same shape for all phases, is used for connecting different layers of the winding. Electric contacts to the windings are provided at the overhang portions without deviating from the staggered arrangement of traversing conductor portions.

The coil mounting apparatus includes a stator core fixing jig, a coil winding jig that is arranged inside the stator core and has thereon an annularly wound belt-shaped coil, and a cuff guide that is provided on the stator core fixing jig and has a guide groove for supporting the cuff portion. The guide groove includes a cuff portion-supporting sub-groove that supports the cuff portion from both sides in a circumferential direction of the stator core, and a coil-guiding sub-groove that is located further away from the axial end face of the stator core than the cuff portion-supporting sub-groove and that has a groove width smaller than that of the cuff portion-supporting sub-groove.

The coil mounting apparatus includes a stator core fixing jig, a coil winding jig that is arranged inside the stator core and has thereon an annularly wound belt-shaped coil, and a cuff guide that is provided on the stator core fixing jig and has a guide groove for supporting the cuff portion. The guide groove includes a cuff portion-supporting sub-groove that supports the cuff portion from both sides in a circumferential direction of the stator core, and a coil-guiding sub-groove that is located further away from the axial end face of the stator core than the cuff portion-supporting sub-groove and that has a groove width smaller than that of the cuff portion-supporting sub-groove.

An electric machine configured to convey electromechanical energy, such as through the conversion between electrical power and mechanical power, includes a slot into which is disposed a coil. The slot can be a stator slot having a trapezoidal cross-sectional shape. The coil can have a plurality of turns that, in cross-section, also includes a trapezoidal shape. The turns can be stacked upon each other in a radial direction between the proximal end and the distal end of the stator slot, each turn of the coil having a different cross-sectional area and a different radial height relative to an adjacent turn of the coil. Additionally and/or alternatively, each turn of the coil, except for the turn of the coil located at the distal end of the stator slot, includes a reduced radial height relative to a turn of the coil that is located radially outward from each turn of the coil.