Air circulation passages connect an accommodation space of an electronic control unit to the outside to circulate air to buffer internal pressure fluctuations. The accommodation space side of the air circulation passages is formed as a divided air circulation passage with a plurality of passages, a cooling object member is arranged to come in thermal contact with air flowing through the divided air circulation passage, and the total cross-sectional area of the divided air circulation passage is smaller than the cross-sectional area of the air circulation passages that are not divided. Because the accommodation space of the electronic control unit is connected to the outside, internal pressure fluctuations can be buffered, and increasing the flow velocity of the air flowing through the divided air circulation passage on the accommodation space side of the air circulation passages allows heat inside the accommodation space to be efficiently radiated to the outside.

An axial flux machine, in particular a single-sided axial flux motor, for an electrical machining device, includes a machine shaft, in particular a motor shaft, a disc-shaped stator, and a disc-shaped rotor which is arranged adjacent to the stator in the axial direction of the machine shaft. The stator is formed as a winding carrier with a plurality of stator teeth for at least one stator winding and the rotor, which is connected to the machine shaft in a rotationally fixed manner, can be set in a rotational movement relative to the stator. The rotor of the axial flux machine has a rotor yoke configured as a bidirectional fan or which is permanently connected to a bidirectional fan by a joining process, the bidirectional fan having at least one radial and one axial air flow direction for cooling the axial flux machine, in particular the stator and the rotor.

An electric motor includes a shaft that is rotatably supported for rotation around a rotation axis, a rotor that is located outwardly of the shaft in a radial direction and rotates integrally with the shaft, a stator that faces the rotor in the radial direction, and a tubular frame that has an inner peripheral surface to which the stator is fixed. The electric motor further includes a groove included in (i) the inner peripheral surface of the frame or (ii) an outer peripheral surface of the stator, and an insulating member disposed in the groove.

A generator for a wind turbine has a rotor and a stator separated radially by an air gap, wherein the stator includes at least one stator segment, which includes a stack of lamination sheets and at least one stator winding, and a stator support structure supporting the at least one stator segment, wherein the generator further includes a cooling arrangement for providing cooling fluid at least to the air gap, wherein the cooling arrangement further includes a cooling fluid flow dividing element for dividing an incoming cooling fluid flow to the stator into a first partial cooling fluid flow directed to the air gap and a second partial cooling fluid flow directed to the stator support structure.

A fan module including a first casing, a second casing, a supporting assembly, a stator assembly, and a rotor assembly. The first casing includes a first vent. The second casing is connected to the first casing and an accommodating space is formed between the first casing and the second casing. The supporting assembly is disposed at the accommodating space, connected to the second casing, and includes a first end and a second end. The stator assembly is disposed at the accommodating space, fixed on the second casing, and disposed around the supporting assembly. The rotor assembly is disposed at the accommodating space, rotatably disposed around the stator assembly, and corresponding to the first vent. The first end of the supporting assembly passes through the rotor assembly and the first vent for protruding out of the first casing.

An electric unit is provided with: a motor having a stator and a rotor; a control unit that controls the motor; and a cooling fan that generates cooling wind for cooling the motor and the control unit. The control unit is provided in the upstream of the stator in a cooling flow channel for circulating the cooling wind. The cooling fan is provided to be positioned in the downstream of the motor in the cooling flow channel, the cooling fan generating the cooling wind by drawing air.

A brushless motor comprising a rotor assembly comprising a shaft, an impeller, a bearing assembly and a rotor core; a stator assembly; a frame comprising an outer portion and a support portion radially inward of the outer portion, the support portion supporting at least one of the rotor assembly and the stator assembly; and at least one strut extending between the outer portion and the support portion, wherein the strut and the stator assembly are aligned such that at least part of the strut and at least part of the stator assembly are disposed along a line substantially parallel to a rotation axis of the rotor assembly.

An integrated circuit includes a nexus and a first, a second, a third, and a fourth circuit board. Each of the first and second circuit boards is coupled to opposing sides of the nexus, and each of the third and fourth circuit boards is coupled to opposing sides of the second circuit board. The integrated circuit is transitionable between a first, open configuration, in which the first, second, third and fourth circuit boards and the nexus are substantially coplanar, and a second configuration, in which the first, second, third and fourth circuit boards and the nexus are coupled to one another to define a cavity therein.

A housing for a gas turbine engine accessory includes an enclosure having a drive end with an opening and a closure. The closure is seated in the opening, defines therethrough a shaft aperture and has a v-band flange extending about a periphery of the closure to limit load carried by the enclosure when the engine accessory is mounted to an accessory gearbox mount in a cantilevered arrangement. Engine accessories for gas turbine engines and mounting arrangements for gas turbine engine accessories are also described.

A motor includes a housing, an impeller and a diffuser in the housing, a rotor assembly and a stator assembly, the motor has an air inlet on the housing and an air outlet, the impeller is disposed adjacent to the air inlet and is connected to the rotor assembly, the diffuser is located downstream of the impeller, the stator assembly is located downstream of the diffuser, the housing includes a front housing and a rear housing connected to each other, a first air duct is enclosed among a rear inner wall of the front housing, a front inner wall of the rear housing and the diffuser and in communication with an outlet of the impeller and the air outlet, and an inner diameter size of the rear end of the rear inner wall is less than or equal to that of the front end of the front inner wall.