A motor comprises a rotor including: a rotor core to rotate on a rotary shaft; a permanent magnet inserted in a magnet insertion hole formed in the rotor core; first and second end plates provided on both end faces of the rotor core respectively in a direction of the rotary shaft; and a blade part provided on a surface of the first end plate to surround the rotary shaft. The rotor includes a cooling hole having an opening between the blade part of the first end plate and the rotary shaft and passing through the rotor core and the second end plate.

An electric machine comprises a housing (9) enclosing at least a rotor (5) and stator windings (4) of a stator (2) of the machine and comprising an end shield (10, 11) at each axial end of the machine. The housing has an air inlet (15) at a first axial end (12) of the machine and a peripheral air outlet (16) at the other, second axial end (13) of the machine. A fan (17) is arranged in the housing at said second axial end to rotate with the rotor for creating a flow of air through the housing from the air inlet to the air outlet for cooling parts of the electric machine. An air outlet channel (19) conducts air radially leaving the fan to the air outlet (16). This channel has a first channel portion with first walls (21) directing air leaving the fan (17) axially back in the direction of the first axial end (12) and a second channel portion with second walls (23) redirecting the air flow from the fan to assume a major radial component.

An adaptor is disclosed for connecting a rotating electrical machine 12 to a prime mover 10. The adaptor comprises at least one air outlet. The adaptor is arranged to provide an increase in a cross-sectional area of air flow towards the outlet. In this way part of the dynamic pressure can be converted into additional static pressure rise through steady expansion of the air flow cross-section. This in turn may help to improve the overall amount of cooling air passing through the machine for a given fan input power.

A brushless DC motor includes a stator, a rotor, and motor terminals mounted on the stator. Each motor terminal includes a planar portion extending circumferentially from the end insulator, a wire-receiving member extending from a first end of the planar portion and folded over an outer surface of the planar portion away from the center axis of the stator at an angle of less than 90 degrees, and a tab portion extending from a second end of the planar portion parallel to the center axis of the stator. A circuit board is disposed adjacent the motor including power switches mounted thereon for energizing the stator windings. Slots are formed in the circuit board to align with and securely receive the tab portions of the motor terminals, thus electrically connecting the motor terminals to the power switches.

A wind-powered generator includes a housing having an inlet, an outlet, and a throat that are coaxial about an axis of symmetry of the housing. A nacelle includes a first rotor mounted on a first end of the nacelle and positioned at least partially within the inlet, the first rotor outputting a first power output, and a second rotor mounted on a second end of the nacelle, the second rotor being positioned at least partially within the outlet and having a diameter less than the first rotor. The second rotor outputting a second power output. The first and second power outputs are combined to provide a combined power output, and a nacelle ratio between outer diameters of the nacelle at the inlet and at the outlet is between about 1.60-1.70, and a housing ratio between inner diameters of the housing at the inlet and at the outlet is about 1.85-1.97.

An electric working machine capable of efficiently cooling components disposed inside, as well as simplifying assembling work and reducing man-hours and production cost. A motor, control board for controlling the motor, rod fixture secured to the front side of the motor, and air guiding partitioning member secured to the rear side of the motor form a motor assembly. The air guiding partitioning member includes a partitioning plate hermetically partitioning between air exhaust and intake ports provided with a predetermined interval longitudinally in the body casing. The partitioning plate has an air guiding window for delivering cooling air taken in from the air intake port to an opening for sucking air on the front side of the motor through a space between the motor and body casing. The control board is disposed on the rear side of the partitioning plate.

A motor assembly for powering a fluid blower includes a stator, a rotor rotatable relative to the stator about an axis of rotation, and an inner shell. The inner shell includes axially opposite first and second shell ends and encloses, at least in part, the stator and the rotor. An outer housing at least partly surrounds the inner shell such that an axially extending fluid channel is defined between the inner shell and the outer housing. A motor controller is positioned within the outer housing and is configured to control at least one operational parameter of the motor assembly. Furthermore, the motor assembly includes a flow-directing endshield located within the outer housing and adjacent the first shell end. The rotor is supported, at least in part, by the flow-directing endshield. The flow-directing endshield is fluidly interposed between the fluid channel and motor controller and is configured to direct a fluid flow between the fluid channel and the motor controller.

A motor controller including a control box and a control panel disposed in the control box. The control box includes at least a first chamber and a second chamber. The control panel is disposed in the first chamber.

A fastener driving tool that forces air from its variable venting volume beneath the piston of the working cylinder and directs that forced air through passageways and toward an electronic controller and/or an electric motor before being vented to atmosphere, thereby drawing heat away from those components during an operational cycle of the movable piston. When the piston returns to its initial position, environmental air is drawn through the same passageways, again past the electronic controller and/or electric motor, thereby twice cooling these “hot” components during a single operational cycle.

In a generator including an engine, a rotating electric machine, and a cooling fan that rotates integrally with a rotor of the rotating electric machine, the cooling fan includes a plurality of fans disposed at an interval in an axial direction of the fan, and a cylindrical body that extends in the axial direction of the cooling fan with a cylindrical cross section in an inner peripheral space of an upstream fan and is disposed more on the upstream side than a downstream fan.