Abstract: A blood pump comprises a pump casing a blood flow inlet and a blood flow outlet connected by a passage, and an impeller. The impeller comprises blades configured to convey blood from the blood flow inlet to the blood flow outlet, the impeller being supported in the pump casing by at least one contact-type bearing comprising a surface of the impeller facing a surface of the pump casing. At least one wash out channel extends through the impeller and is in fluid connection with the passage via a first opening and with the bearing via a second opening. The wash out channel is operatively associated with a secondary pump for pumping blood through the wash out channel towards the bearing. The secondary pump is formed at least partially by said at least one wash out channel extending through the impeller along a direction having at least one tangential directional component.

Abstract: An electric coolant pump includes a pump housing, an electric motor, and a pump wheel. The pump housing has a pumping chamber and a motor chamber which are separated by a separation sidewall. The pumping chamber has a pump volute which extends from a pump inlet to a pump outlet. A volute cooling sector of the pump volute extends over a volute angle of 120°. The separation sidewall has a cooling section which is defined by the volute cooling sector. The electric motor includes a motor rotor, a motor stator having a stator coil arrangement, and a motor electronics arranged in the motor chamber which energizes the stator coil arrangement. The pump wheel is arranged in the pumping chamber and is connected with the motor rotor. The stator coil arrangement is arranged adjacent to the volute cooling sector and thermally contacts the cooling section of the separation sidewall.

Abstract: An implantable pump is configured to be implanted in series with blood flow from a heart. The pump includes a frame configured to be implanted within the natural blood flow of the heart such as a ventricular outflow tract an outlet valve of the heart, and a central axle configured to be affixed within the frame parallel to the blood flow. The pump also includes a rotor attached to the central axle and configured to rotate in order to pump blood, and at least two electromagnetic coils configured to be energized in order to cause the rotor to rotate.

Abstract: A rotating electric machine includes a rotor having a rotor core, a stator having a stator core and a stator coil, a first rotating shaft member having a first flange portion and a first shaft portion, a second rotating shaft member having a second flange portion and a second shaft portion, and a fastening device that fastens the first and second rotating shaft members, in a condition where the rotor core is sandwiched between the first and second flange portions, from opposite sides of the rotor core in an axial direction.

Abstract: A pump is provided with a housing and with an upstream inlet and a downstream outlet and a fluid channel with a channel axis, said fluid channel being arranged between the inlet and outlet. A rotor which can be brought into rotation by way of a motor is arranged within the fluid channel. Furthermore, a sensor arrangement is provided which can detect an inclination of the rotation axis of the rotor.

Abstract: A blood pump may be provided that includes an inlet, an outlet and a rotor for delivering fluid from the inlet to the outlet, wherein the rotor is suspended within the blood pump by radial passive magnetic forces and axially is preloaded in one direction at least by way of passive magnetic forces so that, during a fluid-delivering rotation of the rotor, the axial thrust of the rotor acts counter to the magnetic attraction acting axially in the direction of the outlet.

Abstract: An intravascular blood pump (1) comprises a pump casing (2) having a blood flow inlet (21) and a blood flow outlet (22), and an impeller (3) arranged in said pump casing (2) so as to be rotatable about an axis of rotation, wherein the impeller (3) has blades (31) sized and shaped for conveying blood from the blood flow inlet (21) to the blood flow outlet (22). The blood pump (1) further comprises a drive unit (104) for rotating the impeller (3), the drive unit (104) comprising a plurality of posts (140) arranged about the axis of rotation (10). Coil windings (47) around the posts are sequentially controllable so as to create a rotating magnetic field. The shaft portion (141) of each of the posts (140) comprises a soft magnetic material which is discontinuous in cross-section transverse to the longitudinal axis of the respective post (140).

Abstract: A pumping device includes a single-use device and a reusable device. The single-use device is to be inserted into the reusable device and includes two pump units in series, one behind the other. Each pump unit includes a rotor for a bearingless motor, and can be magnetically levitated and driven without contact for rotation about an axial direction. The reusable device includes a stator for each rotor which form an electromagnetic rotary drive for rotating the rotor about the axial direction. Each stator is a bearing and drive stator with which the rotor can be magnetically driven and levitated without contact with respect to the stator. An independent control device is provided for each stator, and can independently activate a respective stator.

Abstract: A heart pump assembly includes an elongate catheter with a proximal portion and a distal portion, a rotor at the distal portion of the elongate catheter, a driveshaft, and a bearing. The rotor can include an impeller blade shaped to induce fluid flow in a first axial direction. The drive shaft may be coupled to or integrally formed with a proximal end of the rotor and can include a pump element formed in a surface of the drive shaft. The bearing can include a bore into which the drive shaft extends. The pump element is shaped so as to induce fluid flow through the bore in a second axial direction which can be the same or opposite to the first axial direction.

Abstract: An electronic device includes a case for housing electronics. A fan is supported within the case. The fan includes a motor configured to drive fan blades and to generate an electromagnetic charging field. The motor is positioned to provide the charging field to an open area outside the case comprising a charging pad.

Abstract: An air-cooled heat exchanger includes a plenum having an intake and a discharge, a cooling tube assembly inside the plenum, a fan assembly that has a fan, an engine positioned outside the plenum, and an internal drive assembly. The internal drive assembly is configured to transfer torque from the engine to the fan. The internal drive assembly is contained inside the plenum.

Abstract: A system for dynamically mitigating resonance in a transport refrigeration unit (TRU) during a mission, having: a TRU controller configured for operating a TRU engine during the mission according to an operational baseline, and while operating the TRU engine, contemporaneously performing steps including: obtaining a first set of data that comprises real time measurements from one or more accelerometers installed in the TRU; converting the real measurements to a second set of data that comprises real time shock and vibration data; processing the second set of data in a control loop to determine an updated operational baseline that avoids resonance detected in the first set of data; and operating the TRU engine according to the updated operational baseline.

Abstract: A cooling device includes a fan frame including a bottom plate and a base part disposed on the bottom plate, a stationary pillar coupled to the fan frame, and a fan assembly that is rotatably disposed about the stationary pillar. The fan assembly is supported on the stationary pillar by at least one bearing positioned between the fan assembly and the stationary pillar. The cooling device also includes a decorative plate coupled to the stationary pillar. The decorative plate has an identifying indicia that permits at least some light to pass therethrough. The cooling device further includes a light emitting assembly disposed on the fan frame and configured to emit light that is directed toward the identifying indicia.

Abstract: A cooling device includes a fan frame including a bottom plate and a base part disposed on the bottom plate, a stationary pillar coupled to the fan frame, and a fan assembly that is rotatably disposed about the stationary pillar. The fan assembly is supported on the stationary pillar by at least one bearing positioned between the fan assembly and the stationary pillar. The cooling device also includes a decorative plate coupled to the stationary pillar. The decorative plate has an identifying indicia that permits at least some light to pass therethrough. The cooling device further includes a light emitting assembly disposed on the fan frame and configured to emit light that is directed toward the identifying indicia.

Abstract: To provide a vacuum pump capable of efficiently cooling electrical equipment. The vacuum pump includes a pump main body and an electrical equipment case disposed outside the pump main body, wherein the electrical equipment case includes a cooling jacket which has an inner surface and an outer surface in a vertical portion and in which a cooling medium flow passage is formed, and a plurality of electrical equipment that have circuit components and can be cooled by the cooling jacket. The inner surface and the outer surface are formed facing different directions, and the electrical equipment portions are attached respectively to the inner surface and the outer surface so that heat can be transferred.

Abstract: Disclosed are systems, devices, and methods that employ a pump to assist or support blood flow. An apparatus for pumping blood may include a pump housing having an outer wall disposed about a longitudinal pump axis, and having an upstream end and a downstream end; a blood flow straightener having a plurality of fins and positioned in the upstream end of the pump housing and secured to the pump housing by the plurality of fins; a diffuser having a plurality of diffuser fins and positioned in the downstream end of the pump housing and secured to the pump housing by the plurality of diffuser fins; and an impeller positioned between the blood flow straightener and the diffuser, and including a plurality of impeller blades. The apparatus may further include a pump drive configured to impart a rotational motion to the impeller by applying a magnetic field.

Abstract: The present disclosure discloses a portable mobile fan, comprising a fan body and fixing devices, the fan body comprises a fan shell, a windshield cover, an impeller, a motor, a circuit board and a switch button; which has large air output, has a fan body with relative position changed by adjusting fixing brackets, can be fixed on different objects, and has strong practicability.

Abstract: A fluid circulating assembly having a rotation axis is provided. The fluid circulating assembly includes a fan impeller including an inlet ring and a rear plate that together define a central fan chamber. The fluid circulating assembly also includes an electrical machine having a rotor assembly, a stator assembly, and at least one bearing assembly. The rotor assembly is coupled to the rear plate such that the electrical machine is located entirely outside the central fan chamber. The rotor assembly includes a hub portion having a radially inner wall that at least partially defines a central opening extending entirely through the electrical machine and oriented about the rotation axis such that the central opening does not include a shaft extending therethrough.

Abstract: The invention relates to a shaft for supplying air to a fuel cell, comprising a tubular body (12), at least sections of which are hollow, and which has a first component (14) and a second component (16) that are connected to one another at respective neighbouring axial end sections (14a, 16a), and wherein air can flow through a hollow space (12a) of the tubular body (12) for cooling components arranged next to the shaft (10). The invention also relates to a radial compressor (1). The invention further relates to a method for producing a radial compressor (1).

Abstract: A vacuum pump, and a waterproof structure and a control apparatus applied to the vacuum pump which improve efficiency of on-site maintenance work and prevent water from penetrating into a connector connecting portion when a cover is removed during circuit separation or the like. When performing maintenance work, after a chassis of a control apparatus is lowered by around several tens of millimeters, the chassis of the control apparatus is pulled out in a radial direction of a pump. Accordingly, a pump main body and the control apparatus can be readily attached and detached even when sufficient empty space is not available in an axial direction of the vacuum pump. A wall portion is circumferentially protrusively provided in side portions of the base portion and the control apparatus. Furthermore, a sealing member and a lid are inserted into a gap. Therefore, water droplets cannot easily penetrate into the gap.

Abstract: The portable ceiling fan is a fan that removably attaches to a ceiling. The portable ceiling fan magnetically attaches to the ceiling. The portable ceiling fan is independently powered. By independently powered is meant that the portable ceiling fan can operate without a direct connection to an external power source. The portable ceiling fan comprises a ceiling fan, a mounting plate, and a control system. The mounting plate attaches to the ceiling with an adhesive. The mounting plate magnetically attaches to the ceiling fan such that the mounting plate attaches the ceiling fan to the ceiling. The control system remotely controls the ceiling fan such that the ceiling fan can be turned on and off without requiring physical access to the ceiling fan.

Abstract: Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.

Abstract: Disclosed is a turbocharger for an internal combustion engine, having a bearing housing. A turbocharger rotor is mounted to be rotatable in the bearing housing about the rotor axis of rotation of its rotor shaft, wherein a turbine wheel is arranged for conjoint rotation on the rotor shaft and in a turbine housing fixed on the bearing housing. Between the rotor shaft and the bearing housing, an oil seal for sealing the bearing housing with respect to the turbine housing is arranged between the turbine wheel and a radial bearing associated with the turbine wheel in order to seal the bearing housing with respect to the turbine housing. A predetermined breaking point is formed for the turbocharger rotor of the turbocharger which lies in a breaking point region and extends axially between the turbine wheel back and an axial end, facing the turbine wheel back, of the rotor-shaft oil seal.

Abstract: The present disclosure describes techniques concerning a fan assembly. The fan assembly may include a fan, having multiple blades to rotate about an axis, and a housing in which the fan is disposed. Additionally, the fan assembly may include an air inlet formed in a wall of the housing that is transverse to the axis. The air inlet may define an orifice and includes multiple air guides that each extend into the housing from a perimeter of the air inlet.

Abstract: A cooling device includes a frame including a base portion and a barrel portion connected to the base portion, a fan assembly including a hub and a plurality of fan blades connected to the hub, the fan assembly rotatably coupled to the frame via at least one bearing positioned between the barrel part and the hub, a driving assembly disposed on the frame, and a decorative plate having a marking and a column coupled thereto and extending therefrom. The decorative plate is coupled to the base portion using the column and is stationary with respect to the fan assembly. The cooling device further includes a light assembly disposed on the driving assembly and emitting light that illuminates the marking.

Abstract: A fan frame module comprises a frame and a wire-stopping structure. In the frame, an outer wall is divided into a first side section, a first mid section, a central section, a second mid section and a second side section in a first direction. The extension direction of the major axis of the central section is parallel to the central axis of the frame, and the first direction is perpendicular to the extension direction of the major axis of the central section. A wire groove is formed on the first mid section to accommodate a wire. A fastening portion is disposed on one side of the wire groove. A positioning portion is disposed on the other one side of the wire groove. The wire-stopping structure is held by the fastening portion and the positioning portion, and fixed to the outer wall.

Abstract: A patient monitoring device can be configured to provide fast and reliable physiological measurements in a variety of care settings including at a patient's home. The device can include a compact, standalone monitor with telehealth capabilities as well as an intuitive interface for use at home. The device can include a blood pressure, capnography, or pulse oximetry module. A device can include a sleek and continuous outer surface that is easy to clean and generally free of crevices, holes, or surfaces that collect external contaminants. For example, portions of the housing can connect together using a limited number of screws, thereby limiting a number of holes. The device can include a vent cover that can be rotated to reconfigure the function of the vent cover. For example, the vent cover can function as a stabilization feature and/or a cover for a ventilation hole, while permitting exhaust through the ventilation hole.

Abstract: A centrifugal fan that is light in weight and has a structure that restrains vibration are provided. The centrifugal fan includes a resin upper casing, a resin lower casing, an impeller, a motor, and a circuit board. The impeller, the motor and the circuit board are housed between the resin upper casing and the resin lower casing. Radial ribs and a concentric ribs for reinforcing are formed at a bottom surface of a concave part of the lower casing. Resin pins are provided in a standing manner at these rib parts, and the circuit board is fixed to the lower casing by the resin pins.

Abstract: A ventilation system for an underground mine includes a blowing curtain, a passive regulator in a shape of an airfoil and an airflow ventilation source. The passive regulator is positioned in the air path adjacent a discharge end of the blowing curtain.

Abstract: Apparatus, including a pump system, features a controller having a signal processor or processing module configured to: receive signaling containing information about a relationship between frequencies of pump vibration resonances detected around critical pump speeds and a 3-dimensional pump vibration power spectrum in the frequency domain with respect to pump speed and pump temperature change differences; and determine corresponding signaling containing information to adjust the pump speed to avoid the pump vibration resonances around the critical pump speeds, based upon the signaling received. The signal processor or processing module is also configured to provide the corresponding signaling as control signaling to adjust the pump speed.

Abstract: A compressor may include a shell, a terminal assembly, an electronics module, and a molded plug. The terminal assembly may engage the shell and may include an outwardly extending conductor and a terminal fence at least partially surrounding said conductor. The electronics module may include a back plate having an opening through which said terminal fence is received. The back plate may include flexible tabs and a spring element. The flexible tabs may removably engage the terminal fence. The spring element may contact the shell and bias the back plate away from the shell. The molded plug may engage the terminal fence and may engage the conductor for electrical communication between the conductor and the molded plug.

Abstract: Example bleed air and engine starter systems are described herein that employ a shaft-driven compressor to start an aircraft engine and/or to supply pressurized air to one or more systems of an aircraft. An example compressor includes a housing and an impeller disposed within a cavity of the housing. The impeller is operatively coupled to a drive shaft. The compressor includes a first port in the housing to direct onto the impeller to rotate the impeller when the compressor is operating in a first mode. In the first mode, the impeller is to drive the drive shaft. The compressor also includes a second port in the housing oriented to provide air to the impeller when the impeller is operating in a second mode. In the second mode, the drive shaft is to rotate the impeller to draw the air from the first port and increase a pressure of the air.

Abstract: An immersion cooling apparatus includes: a refrigerant tank configured to store a non-boiling fluorine-based insulating refrigerant in which an electronic device is to be immersed; a circulation passage of the fluorine-based insulating refrigerant that is located between the refrigerant tank and a refrigerant cooling device; and a sealed pump that is arranged in the circulation passage, is configured to seal a rotor shaft with an impeller and a bearing portion for the rotor shaft in a sealed case while the rotor shaft and the bearing portion are immersed in the fluorine-based insulating refrigerant, and is configured to circulate the fluorine-based insulating refrigerant between the refrigerant tank and the refrigerant cooling device.

Abstract: Various “contactless” bearing mechanisms including hydrodynamic and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing defining a pumping chamber. The housing has a spindle extending into the pumping chamber. A spindle magnet assembly includes first and second magnets disposed within the spindle. The first and second magnets are arranged proximate each other with their respective magnetic vectors opposing each other. The lack of mechanical contact bearings enables longer life pump operation and less damage to working fluids such as blood.

Abstract: A fluid circulating assembly includes an electrical machine having a rotor assembly, a stator assembly, and a housing. The housing includes an annular center section and at least two extension portions extending radially outward from the annular center section of the housing. The fluid circulating assembly also includes a controller assembly coupled to the housing. The said controller assembly is positioned radially outward from the stator assembly and located in at least one of the at least two extension portions.

Abstract: An axial flow fan motor 100 comprises: a casing outer frame 61; an impeller 10; a rotor shaft 20 as a rotation axis at a center of the impeller 10; a bearing housing 30 in an inside of a rotor housing 11; and a base portion hub 62 in an air blowout opening side 2, wherein, in a cross-sectional view along the rotation axis, the base portion hub 62 has an outer peripheral portion 65 at least partially inclined to the rotation axis side by an angle ?1 toward the air blowout opening side 2 with regard to a straight line parallel to the rotation axis, and the casing outer frame 61 has an inner peripheral portion 67 at least partially inclined to the rotation axis side by an angle ?2 toward the air blowout opening side 2 with regard to a straight line parallel to the rotation axis.

Abstract: A pump assembly with an electric drive motor and with an electronics housing (10). The electronics housing in which at least one first electrical circuit board (14) is arranged. On the circuit board electrical contacts (18) are formed. Via the electrical contacts, at least one electronic component (16), in the inside of the electronics housing (10) may be programmed. At least one opening (22), through which the electrical contacts (18) on the circuit board (14) are contactable from the outside, is formed on a wall (20) of the electronics housing (10).

Abstract: A fault in a fan motor is detected on the vehicle side with simple wiring. Provided is a vehicle-cooling-fan control system including a fan control unit having a motor control unit that controls a three-phase motor for driving a cooling fan, a vehicle-side ECU that is provided superordinate to the fan control unit and that controls a vehicle, and an air-conditioning-system ECU that controls an air-conditioning apparatus of the vehicle, wherein the fan control unit, the vehicle-side ECU, and the air-conditioning-system ECU are connected so that information can be transferred therebetween via a vehicle network CAN, the fan control unit outputs fault information via a CAN driver in the case where a fault has been detected at a switching device, and the vehicle-side ECU exercises control via the vehicle network CAN to protect the fan control unit and the air-conditioning-system ECU in the case where the importance of the fault information is high.

Abstract: A blood pump has a hollow body in which an impeller with a spiral blading produces an axial propulsion of blood along the impeller, as well as an at least partly actively stabilized magnetic bearing device and a hydrodynamic bearing device for the impeller. The impeller may be set into a rotation about a rotation axis of the impeller with a motor stator located outside the hollow body. The hollow body has an inlet for the flow of blood into the hollow body in an inflow direction which is essentially parallel to the rotation axis, and an outlet for the outflow of the blood out of the hollow body in an outflow direction which is offset to the rotation axis of the impeller to produce a non-zero outflow angle (?) between the inflow direction and the outflow direction. A total artificial heart can be formed from two such blood pumps.

Abstract: The cardiac pump, which is suitable for implantation into a ventricle of a human heart, has a primary blood flow path through a housing, a rotatable pump member disposed within the housing for causing blood to flow along the primary flow path, the pump member being rotatably coupled to the housing about an upstream bearing and a downstream bearing. The pump member includes an impeller shroud defining a secondary flow path in fluid communication with the primary flow path. The downstream bearing comprises a rotational bearing member and a stationary bearing seat for the bearing member, there being a circumferential transition between the bearing seat and the bearing member, the circumferential transition being disposed in the secondary flow path and arranged to be washed by blood passing along the secondary flow path.

Abstract: A remote controller with magnet for ceiling fan and includes a transmitter body defining a compartment in which at least a magnet is installed. With the magnet installed therein, the transmitter body can readily attach to a flat surface of a ferric object. Alternatively, the transmitter body can be used with a holder defining a pocket in which a ferric plate is arranged. The transmitter body can magnetically attach to the ferric plate of the holder. By this arrangement, the transmitter body can readily stored within the pocket. This arrangement can effectively increase the convenience of the operation and usage. In addition, the overall configuration is simple and free from all kind of malfunction. It can be readily expected to reach its intended convenience and configurational stability.

Abstract: A centrifugal blower in a cooling system of an electronic device having asymmetrical blade spacing with acceptable balance. The asymmetrical blade spacing is determined according to a set of desired acoustic artifacts that are favorable and balance that is similar to that found with equal fan blade spacing. In one embodiment, the fan impeller can include thirty one fan blades. The perceived sound quality from the fan is improved with essentially no effect on the thermal performance of the fan.

Abstract: The invention relates to a low pressure pump/vacuum pump for gaseous media, comprising two interacting combs the teeth of which are configured as cycloidal components, the duplicate compressor stages being interconnected. A power unit of the pumps/compressors is driven and the power unit of the other pump/compressor, which is arranged coaxially, is entrained via a rotational connection.

Abstract: An impeller includes a metal base plate, a shaft and a plurality of plastic blades. The metal base plate includes a shaft-coupling portion, a peripheral portion, and first and second surfaces. The first surface faces away from the second surface in a first direction, and the second surface faces away from the first surface in a second direction. The metal base plate is flat between the shaft-coupling portion and the peripheral portion. The first surface has a permanent magnet. The shaft has a fixing end coupled with the shaft-coupling portion, as well as a free end extending axially in the first direction. Each plastic blade has a coupling portion coupled with the peripheral portion, as well as an air-driving portion axially extending in the second direction. The impeller may be rotatably coupled with a driving module. The driving module is installed in a fan frame to form an advection fan.

Abstract: A fuel pump has a motor portion and a pump portion, wherein fuel is sucked from an inlet port into the pump portion when an impeller is rotated and the pressurized fuel is discharged out of the fuel pump from an outlet port. A stator has multiple stator cores on which respective stator coils are wound to form a star-connection winding. A terminal sub-assembly is provided hi an axial side portion of the stator. The terminal sub-assembly has multiple conductive members and each end portion of the stator coils is respectively connected to connecting portions of the conductive members, which are arranged at equal intervals in a circumferential direction of the terminal sub-assembly.

Abstract: The internal-driven compressor having a powered compressor rotor. The internal-driven compressor includes a compressor housing including a suction port and a discharge port, an internal driver including a rotor and a stator, the rotor and the stator located within the compressor housing, the stator located radially inward of the rotor, and a powered compressor rotor including an annular body extending about a center axis, wherein the rotor is fixed to the powered compressor rotor and configured to rotate the powered compressor rotor about the center axis in response to a force imparted by the stator.

Abstract: Systems and devices for thermodynamically regulating portions of a dynamoelectric machine are disclosed. In one embodiment, a fan assembly element includes: an axially inner shroud segment configured to form a portion of an annular assembly about a rotor of a dynamoelectric machine, wherein the axially inner shroud segment includes a rotor hub interface configured to physically connect to a complementary portion of a rotor hub; a set of fan blades physically connected to and extending axially from a face of the axially inner shroud segment; and an axially outer shroud segment physically connected to the set of fan blades.

Abstract: A brushless motor 5 of the present invention comprises: a rotor magnet 13 having a magnetized circumferential surface 13a comprising an upper circumferential surface 13a1 magnetized with a plurality of magnetic poles and a lower circumferential surface 13a2 magnetized with a plurality of magnetic poles; and a stator 30 having a stator stack 31 at least partially facing the lower circumferential surface 13a2, wherein the upper circumferential surface 13a1 of the rotor magnet 13 has a surface magnetic flux density of substantially the same level from a center of a magnetic pole until a vicinity of an adjacent magnetic pole, and the lower circumferential surface 13a2 of the rotor magnet 13 has a surface magnetic flux density decreasing from a center of a magnetic pole toward an adjacent magnetic pole.

Abstract: An electrically driven aircraft includes at least one drive arrangement which has an aircraft propeller comprising a propeller shaft, a propeller bearing configured to radially and axially support the propeller shaft, a propeller hub which is driven by the propeller shaft, and a plurality of propeller blades attached to the propeller hub. A dynamoelectric rotary machine has a stator and a rotor which interacts with the stator and is coupled directly to the propeller shaft. The propeller bearing and the stator, are accommodated in a support structure which is mechanically coupled to an aircraft structure of the aircraft.

Abstract: A ventilator (1) comprises an electric motor (2) comprising a casing (4), a rotor rotatable inside the casing (4) about an axis of rotation (R), a shaft (5) integral with the rotor and having at least one end portion (6) protruding from the casing (4); the ventilator (1) comprises a fan equipped with a plurality of blades (7), a hub (8) for mounting the blades (7) and comprising a bottom wall (9) for coupling to the shaft (5) and at least one perimeter portion (11) extending from the bottom wall (9) to define a base for connecting the blades (7); the hub (8) is defined by a rigid disc (8) and comprises a plurality of bases (11a) which extend from the bottom wall (9) at each of the blades (7) to define a connecting surface for joining each blade (7) to the bottom wall (9).