A stator for a rotating electrical machine is disclosed, the stator comprising a plurality of stator slots (22) each of which accommodates a plurality of coils (40) of stator windings (18). Radial air gaps (46) are present between the coils of adjacent stator slots as the coils extend out of the stator slots. Insulating means (42, 54, 84) are provided between the coils of a stator slot as the coils extend out of the stator slot. The radial air gaps (46) are defined between the insulating means of the coils of adjacent stator slots. This can allow radial air passages to be formed through the windings, while ensuring sufficient electrical insulation between the coils of a stator slot.

A stator for a rotating electrical machine is disclosed, the stator comprising a plurality of stator slots (22) each of which accommodates a plurality of coils (40) of stator windings (18). Radial air gaps (46) are present between the coils of adjacent stator slots as the coils extend out of the stator slots. Insulating means (42, 54, 84) are provided between the coils of a stator slot as the coils extend out of the stator slot. The radial air gaps (46) are defined between the insulating means of the coils of adjacent stator slots. This can allow radial air passages to be formed through the windings, while ensuring sufficient electrical insulation between the coils of a stator slot.

According to an embodiment, provided is a motor which comprises: a shaft; a rotor coupled to the shaft; a stator disposed corresponding to the rotor; and a housing disposed on the outside of the stator. The stator includes: a stator core; an insulator coupled to the stator core; a plurality of projections extending from the lower end of the insulator; and a protruding portion disposed below the insulator and fixed to the housing. The plurality of projections are spaced apart from each other in the circumferential direction, and at least a portion of the protruding portion is disposed in the spaces formed between the plurality of projections.

According to an embodiment, provided is a motor which comprises: a shaft; a rotor coupled to the shaft; a stator disposed corresponding to the rotor; and a housing disposed on the outside of the stator. The stator includes: a stator core; an insulator coupled to the stator core; a plurality of projections extending from the lower end of the insulator; and a protruding portion disposed below the insulator and fixed to the housing. The plurality of projections are spaced apart from each other in the circumferential direction, and at least a portion of the protruding portion is disposed in the spaces formed between the plurality of projections.

A fan motor according to an embodiment includes a bearing holder, a stator, a circuit board, and a synthetic resin. The stator is mounted at an outer circumference of the bearing holder. The circuit board is electrically connected to a coil of the stator, is mounted at a surface of the base part at an opposite side to the bearing holder, and extends from a base part to a connector housing. The synthetic resin seals the bearing holder, the stator, and the circuit board, except for both end faces of the bearing holder. The connector housing has a gate opening that is injected with the synthetic resin at the time of sealing and ribs that are at an opposite side to the gate opening with the circuit board between the ribs, and tops of the ribs making contact with the circuit board.

Permanent magnet external rotor (1) for an electric motor, comprising a cup-shaped body (2) provided with a bottom (20) and a side wall (21); at least one magnet (3), defining a plurality of poles and fixed inside said cup-shaped body (2); and a metal insert (4), defined by a helical spring fitted around the at least one magnet (3) which forms the closure of a magnetic circuit of the electric motor.

Permanent magnet external rotor (1) for an electric motor, comprising a cup-shaped body (2) provided with a bottom (20) and a side wall (21); at least one magnet (3), defining a plurality of poles and fixed inside said cup-shaped body (2); and a metal insert (4), defined by a helical spring fitted around the at least one magnet (3) which forms the closure of a magnetic circuit of the electric motor.

The present disclosure provides a stator of an electric rotating machine, a hairpin of a stator of an electric rotating machine, and a manufacturing method thereof. The stator for the electric rotating machine comprises a stator core, and a stator coil comprising hairpins. Each hairpin comprises a conductor, a film surrounding the conductor, a pair of insertion parts configured to be inserted into different slots, and a connection part connecting the insertion parts. The connection part comprises first and second bending parts bent with a predetermined radius of curvature such that the pair of insertion parts are insertable into different layers. The hairpins include first and second hairpins, each of the first and second hairpins configured to protrude from one end of the stator core by different protrusion lengths. Each of the first and second hairpins comprises a region configured to cross each other.

A process is described, for making an electric conductor for a winding of an electric machine comprising the following steps: providing an external shell (20} with a tubular shape made of electrically conducting material; inserting at least two wires (215 made of electrically conducting material in the external shell (20); heating the external shell (20) and the wires (21) inserted therein; laminating wherein the external shell (205 and the wires (215 are formed to modify the profile of their cross section; optionally repeating at least one of the two previous steps; an electric conductor made with such process and an electric machine comprising a winding made with such electric conductor are further described.

An insulating composition having a polymer resin, a nanoclay, and one or more nanofillers. The insulating composition has a thermal conductivity of greater than about 0.8 W/mK, a dielectric constant of less than about 5, a dissipation factor of less than about 3%, and a breakdown strength of greater than about 1,000V/mil. The insulating composition has an endurance life of at least 400 hours at 310 volts per mil.