Lg Magna E-powertrain Co., Ltd.

Samsung Life Public Welfare Foundation

Jeongmin Lee

Wonjung Sung

Gyeongjae Park

Jaemin Kim

Hojun Shin

Kyeonghwan Kim

Jung-il Lee

Duk Lyul Na

Hyunsoo Seol

Wooram Jung

A stator for an electric motor according to the present disclosure includes a stator core having a plurality of slots and teeth, and a stator coil wound via the plurality of slots, wherein the stator coil includes a plurality of hairpins inserted into the plurality of slots and connected in series with one another, wherein the plurality of hairpins is spaced apart from one another by a partial discharge suppression distance to suppress partial discharge between adjacent hairpins, wherein a partial discharge suppression distance between hairpins with a high voltage distribution ratio is farther than a partial discharge suppression distance between hairpins with a low voltage distribution ratio when power is applied to the stator coil. This may result in suppressing reduction of lifespan of the stator coil due to the partial discharge of the hairpins.

Stator for electric motor

The present disclosure provides an apparatus for intracranial drug injection including a body unit having a through-hole extending between a first opening in a topmost surface and a second opening in a bottommost surface, a cap unit having a shape corresponding to at least a part of an inner surface of the through-hole and being inserted into the first opening to cover the first opening, and a tube unit having one end coupled to the second opening and another end extending toward an affected brain lesion.

Apparatus and method for intracranial drug injection

A motor according to an embodiment of the present disclosure may include a housing comprising an accommodation space and a refrigerant supply hole; a stator core disposed in the accommodation space and coupled to an inner circumferential surface of the housing; a rotor core rotatably disposed in the accommodation space; a shaft coupled to a central portion of the rotor core; and a refrigerant supply groove formed as a recess in a portion of the inner circumferential surface of the housing adjacent to a location where the inner circumferential surface of the housing is coupled to the stator core. The refrigerant supply groove may comprise a main groove communicating with the refrigerant supply hole and extending in a circumferential direction of the stator core; and a plurality of branched grooves extending in an axial direction from both sides of the main groove.

Motor with a refrigerant supply groove in a housing

Disclosed herein are a stator and a method for manufacturing the same. The stator according to embodiments of the present disclosure includes an insulating part and a plurality of stator coils each having two ends electrically connected to form one joint portion. The insulating part is configured to cover at least respective parts of the joint portions, and to provide a distance between neighboring joint portions. Accordingly, a partial discharge caused by a surge between the joint portions of the stator coils may be prevented, allowing operational reliability of the stator to be increased.

Stator and method for manufacturing the same

Growing community of inventors

Seoul, South Korea

Jeongmin Lee