The present invention is provided with: an insulation holder formed of a thermoplastic resin material and having a first opening; a wire connection ring formed of a thermoplastic resin material and having a second opening; and a joining component inserted astride in the first opening and the second opening, the joining component being formed of a metal material having a higher melting point than those of the thermoplastic resin materials, the joining component having a higher stiffness than those of the insulation holder and the wire connection ring, wherein a welded part is formed by welding in at least a part of an area where each of the insulation holder and the wire connection ring has contact with the joining component.

A fan motor of a cleaner capable of exhibiting a high output is provided. The fan motor includes a shroud disposed to cover a fan, a rotor fixed to a shaft, and a stator disposed opposite to the rotor in an axial direction with a predetermined gap therebetween. The stator includes a substrate on which a bearing is installed and a plurality of armatures disposed around the bearing. A coil is formed in such a way that a flat wire having a rectangular cross-section is bent to a short side thereof to be wound around an iron core.

A fan motor of a cleaner capable of exhibiting a high output is provided. The fan motor includes a shroud disposed to cover a fan, a rotor fixed to a shaft, and a stator disposed opposite to the rotor in an axial direction with a predetermined gap therebetween. The stator includes a substrate on which a bearing is installed and a plurality of armatures disposed around the bearing. A coil is formed in such a way that a flat wire having a rectangular cross-section is bent to a short side thereof to be wound around an iron core.

An electromagnetic induction pump includes a tubular internal inductor comprising a plurality of internal combs and of internal coils positioned between the teeth of the internal combs, the inside of the internal inductor forming a cavity; an internal tube positioned around the internal inductor; a pumping canal allowing the circulation of a fluid that is to be pumped, an external tube, the canal being between the internal tube and the external tube; a tubular external inductor positioned around the external tube and comprising a plurality of external combs and of external coils positioned between the teeth of the external combs; the electromagnetic pump further comprising a movement device for moving the internal combs, and able to vary the radial clearance between the internal combs and the internal tube and comprising a first part positioned inside the internal inductor and in connection with the internal combs so as to be able to move them radially, and a second part extending at least partially outside of the internal inductor and being connected to the first part in such a way as to control the first part.

An electromagnetic induction pump includes a tubular internal inductor comprising a plurality of internal combs and of internal coils positioned between the teeth of the internal combs, the inside of the internal inductor forming a cavity; an internal tube positioned around the internal inductor; a pumping canal allowing the circulation of a fluid that is to be pumped, an external tube, the canal being between the internal tube and the external tube; a tubular external inductor positioned around the external tube and comprising a plurality of external combs and of external coils positioned between the teeth of the external combs; the electromagnetic pump further comprising a movement device for moving the internal combs, and able to vary the radial clearance between the internal combs and the internal tube and comprising a first part positioned inside the internal inductor and in connection with the internal combs so as to be able to move them radially, and a second part extending at least partially outside of the internal inductor and being connected to the first part in such a way as to control the first part.

A laminated core for an electric machine includes a plurality of laminated core pieces. Each of the plurality of core pieces includes a first portion and a second portion having a plate thickness smaller than a plate thickness of the first portion.

A laminated core for an electric machine includes a plurality of laminated core pieces. Each of the plurality of core pieces includes a first portion and a second portion having a plate thickness smaller than a plate thickness of the first portion.

A motor rotor includes a wound rotor comprising a rotating shaft, a rotor core, and a plurality of rotor coils. The rotor core is fixedly sleeved on the rotating shaft, a plurality of winding holes surrounding the rotating shaft are provided at intervals on the rotor core, each winding hole penetrates through two ends that are of the rotor core and that are disposed in an axial direction, each rotor coil is wound on hole walls of two adjacent winding holes, and two adjacent rotor coils share one winding hole. A gap is formed between two adjacent rotor coils, a first shaft hole is formed on the rotating shaft, the gap is configured as a first heat dissipation channel connected to the first shaft hole, and the first heat dissipation channel is used for inflow of coolant in the rotating shaft.

A motor rotor includes a wound rotor comprising a rotating shaft, a rotor core, and a plurality of rotor coils. The rotor core is fixedly sleeved on the rotating shaft, a plurality of winding holes surrounding the rotating shaft are provided at intervals on the rotor core, each winding hole penetrates through two ends that are of the rotor core and that are disposed in an axial direction, each rotor coil is wound on hole walls of two adjacent winding holes, and two adjacent rotor coils share one winding hole. A gap is formed between two adjacent rotor coils, a first shaft hole is formed on the rotating shaft, the gap is configured as a first heat dissipation channel connected to the first shaft hole, and the first heat dissipation channel is used for inflow of coolant in the rotating shaft.

A stator (30) of an electric machine has a stator lamination stack (20) that comprises stator laminations (1). The stator (30) has at least one stator winding with conductor bars (31) arranged in slots of the stator lamination stack (20) and fixed in the slots of the stator lamination stack (20) with the aid of a fixing device. To improve the stator (30) with regard to the service life thereof and/or to the producibility thereof, at least one clamping stator lamination (8;28) has a clamping geometry that serves as the fixing device.