A stator core cooling structure and a motor cooling system are provided. The stator core cooling structure includes a stator core and a motor housing. Axial grooves are distributed on an outer circumference of the stator core and/or an inner circumference of the motor housing, with the axial grooves extending in an axial direction of the stator core and/or the motor housing. The stator core is assembled in the motor housing, and cooling liquid passages are disposed between the stator core and the motor housing by the axial grooves, so that the cooling liquid cools the stator core via the cooling liquid passages.

A rotor device for a flat brushless electric motor for an automobile roof system has a rotor housing having a first cylinder and a second cylinder. The cylinder elements are configured to be hollow-cylindrical, have different internal and external diameters such that a stator device is disposable between the cylinder elements, and are concentrically aligned with one another. At least one magnetic module is disposed on each cylinder element. A stator device for a stator housing element has a base and a wall element mutually disposed so that the stator housing element is configured in the manner of a pot; and an axle element for externally disposing a rolling bearing for a rotor device. The axle element is disposed in the center of the stator housing element such that the axle element and the wall element, viewed in cross section, extend away from the base element in the same direction.

A motor includes a stator, a rotor of a consequent-pole type including a rotary shaft, a bearing as a rolling bearing that supports the rotary shaft, a bearing holding part that is fixed to the stator and holds an outer ring of the bearing, and a creep prevention part. The creep prevention part is arranged between the outer ring and the bearing holding part and increases friction resistance in a circumferential direction of the outer ring between the outer ring and the bearing holding part.

A motor includes a stator, a rotor of a consequent-pole type including a rotary shaft, a bearing as a rolling bearing that supports the rotary shaft, a bearing holding part that is fixed to the stator and holds an outer ring of the bearing, and a creep prevention part. The creep prevention part is arranged between the outer ring and the bearing holding part and increases friction resistance in a circumferential direction of the outer ring between the outer ring and the bearing holding part.

An electrical machine having a non-rotating part, a rotating part, at least one bearing supporting said rotating part and having a rotating ring and a non-rotating ring, a fiber grounding brush fixed to said non-rotating part and having a support secured to the non-rotating part and a plurality of conductive fibers having a first end secured to said support and a second free end, opposite to said first end, extending towards the rotating part, and a conductive sleeve having a base fastened to the rotating part or to the rotating ring of the bearing and a conductive layer covering at a portion of a surface of the base, the second free end of the conductive fibers of the fiber grounding brush being in contact with said conductive layer.to

An electrical machine includes a non-rotating part, a rotating part, at least one bearing that includes a rotating ring and a non-rotating ring and supports the rotating part, a grounding brush fixed and secured to the non-rotating part, and having a free end extending towards the rotating ring of the bearing, and a conductive layer covering a portion of a surface of the rotating ring of the bearing such that the free end of the grounding brush is in contact with the conductive layer.

An electrical machine includes a non-rotating part, a rotating part, at least one bearing that includes a rotating ring and a non-rotating ring and supports the rotating part, a grounding brush fixed and secured to the non-rotating part, and having a free end extending towards the rotating ring of the bearing, and a conductive layer covering a portion of a surface of the rotating ring of the bearing such that the free end of the grounding brush is in contact with the conductive layer.

A blower motor is provided and includes a support assembly provided with a first stop step surface, a stator assembly disposed in the support assembly, a rotor assembly disposed in the stator assembly and an end cover disposed on the stator assembly and abutted against the support assembly and provided with a second stop step surface. The rotor assembly includes a rotating shaft and two ends of the rotating shaft are respectively provided with a first bearing and a second bearing. A resilient gasket is provided on one of the first stop step surface and the second stop step surface. The bearings are positioned by springs and cooperate with the resilient gasket to apply a tightening force to the bearings, which can reduce clearances in the bearings and effectively prevent balls in the bearings from making noise under a high-frequency vibration.

A rotating shaft of a rotary electric machine is supported by a rotary electric machine housing. For the rotary electric machine housing, compressed air flow passages are formed. In a gas turbine engine, an air bleed port is formed in a shroud case, and compressed air that is compressed by a compressor wheel flows into the air bleed port. The compressed air that has passed through the air bleed port flows through air bleed passages formed in an engine housing and the compressed air flow passages. Then, the compressed air flows into a rotary electric machine housing.

For a rotary electric machine housing, a cooling jacket and compressed air flow passages are formed on an outer circumferential side of the cooling jacket. On an outer side wall of the rotary electric machine housing, a terminal casing is formed and electric terminal portions are accommodated in the terminal casing. Air bleed ports are formed in a shroud case of a gas turbine engine. Compressed air that is compressed by a compressor wheel flows into the air bleed ports. The compressed air that has passed through the air bleed ports flows through air bleed passages formed in an engine housing and the compressed air flow passages. Then, the compressed air reaches the terminal casing.