Abstract: A resistance module for increasing a runup torque for a rotor of an electric machine with a rotor winding includes first and second connection points, a plurality of electrically-conductive layers electrically connected to the first and second connection points. Each of the layers surrounds an axis of the resistance module at least partially in a circumferential direction and has a layer start point and a layer end point. At least one of the layers is configured in an undulating shape in the circumferential direction, with undulations projecting radially outwards. A first insulating layer is disposed between neighboring ones of the layers. The layer end point of one of the layers is electrically connected at a tie point to the layer start point of a neighboring one of the layers. At least one fastening element is disposed between two neighboring undulations in the circumferential direction and radially outside of the layers.

Abstract: The present invention provides an axial flux motor (10) having: a rotor (20) having a radially extending portion (20r) and an axially extending portion (20c) having a first side (20a) and a second side (20b); a stator (22) having an inner aperture (30), a front wall (34) having a first side (34s) and a second side (34i) and being axially spaced from the first side (20a) of the rotor (20) by a gap (38), a bearing member (32) within the inner aperture (30) of the stator (22) and supporting the axially extending portion (20c) of the rotor (20); a casing (40) having an axially and circumferentially extending outer portion (48) surrounding said rotor (20) and having an inner surface (43); a cover plate (42) having an inner face (42i) confronting and being spaced from said second side (20b) of said rotor (20); a containment chamber (26) including said second side (34i), and said inner face (42i) of said cover plate (42) and having a top portion (45); a sump (50) within the containment chamber (26); and one or more

Abstract: A direct-drive brushless DC motorization apparatus is provided. The apparatus includes an outer rotor having poles constructed with segments of forty or forty-four permanent magnets alternatively magnetized north and south. The outer rotor is adapted to be part of a wheel and is rotatable with respect to an axis of the wheel. The outer rotor is mounted about a stator core of ferromagnetic material and is separated from the stator core by a clearance gap. The stator core has forty-two slots, and adjacent slots are separated by teeth. A three-phase winding with coils of insulated wire is wound around the teeth of the stator core. The three-phase winding is divided in two sets of consecutive teeth for each of the three phases, with each of the two sets of a same phase being diametrically opposed in the stator core.

Abstract: A motor for a laundry appliance includes a drive shaft coupled to a drum at a first end. The rotor frame is coupled proximate the second end of the drive shaft, where the rotor frame includes at least one polymeric material. A central hub includes a core and a perimetrical ring that extends circumferentially around the core. A plurality of recesses are defined within a planar surface of the perimetrical ring, wherein a portion of the polymeric material is received within the plurality of recesses to secure the rotor frame to the central hub.

Abstract: A rotating machinery equipment is disclosed, including a rotating electrical machine having a stator (1) and a rotating shaft (7), whereon a rotor (11) is mounted. The machinery equipment further includes a cooling fan (23) comprised of a rotating impeller (33) mounted on the rotating shaft (7) for co-rotation therewith. Cooling gas passages (45, 47) are provided for delivering compressed cooling gas through the stator and rotor. The cooling gas is delivered by the impeller (33) into a cooling-gas distribution chamber (31). The pressure of the cooling gas in the cooling-gas distribution chamber generates an axial force balancing the axial thrust generated on the electrical machine by the cooling gas flow.

Abstract: An electric rotating machine does not require management of the gap between a fan guide at a small-diameter portion and a fan fixing portion and can suppress the manufacturing and maintenance costs from increasing. An electric rotating machine is provided with a small-diameter portion fan guide that extends both in a circumferential direction and in an axial direction in such a way as to be provided a space in the radial-direction outer side of a small-diameter portion that is a portion of an extending axle portion, of a rotation axle, that extends in the axial direction from a rotor, the portion being at an axial-direction departing side than a fan fixing portion to which an axial-flow fan is fixed and in such a way that the small-diameter portion fan guide is disposed to be provided a space with the fan fixing portion in the axial direction.

Abstract: A linear compressor and a linear motor are provided. The linear motor may include a first stator, a second stator spaced apart from the first stator, and a permanent magnet disposed to be movable in a first direction between the first and second stators. The first stator may include a bobbin with a coil wound thereon, and a stator core that surrounds the bobbin. The stator core may be located between the second stator and the coil and may include first and second magnetic poles spaced apart from each other. One portion or entire portions of each of the first and second magnetic poles may have a constant magnetic path width within a range of a movement trajectory of the permanent magnet.

Abstract: A single phase brushless motor and a power tool are provided. The single phase brushless motor includes a stator and a rotor. The stator includes a stator core and windings wound around the stator core. The stator core includes a yoke and at least two teeth. The tooth includes a tooth body and a tooth tip. The tooth tip includes first and second pole shoes. The two pole shoes of each tooth are symmetrical about a center line of the tooth body. Each tooth defines a positioning groove facing the rotor between the two pole shoes. Pole shoes of adjacent two of the at least two teeth are spaced apart by a slot opening. A width of the positioning groove is greater than a width of the slot opening. The peak value of the cogging torque of the motor is increased, and the motor has a large startup torque.

Abstract: A stepping motor includes a one-piece stator integrally molded by using a Fe—Ni alloy plate through machining, a rotor accommodating through-hole, and in which a magnetic path is disposed around the rotor accommodating through-hole. A rotor is rotatably arranged inside the rotor accommodating through-hole. A magnetic core is connected to the stator, and a coil is wound on the magnetic core. A Cr-diffusion region having a molten-solidified portion of Cr is diffused in the Fe—Ni alloy stator in a portion of the magnetic path.

Abstract: The present invention relates to a fan device with modular functionality, whereby an output end and input end of the fan are respectively provided with terminal joints. Two connector joints on the I/O module connecting wires are connected respectively to the terminal joints of the output end and the input end of the fan. Therefore, the output/input terminals are modularized by means of the separated wires to reduce the problems of wire trimming.

Abstract: The disclosure relates to an electric machine having a stator, a rotor and an inverter arranged in an inverter housing. The rotor is rotatably mounted about a rotational axis with its rotor axis in a first end shield and in a second end shield. The second end shield is arranged in or on the inverter housing. At least one suction opening and at least one blowing opening are arranged on the radial periphery of the second end shield. At least two cooling fins are provided on the second end shield, a baffle is arranged between the cooling fins of the second end shield and the stator and the rotor which is arranged in the stator, such that a cooling medium flowing radially through the at least one suction opening is guided to the at least one blowing opening.

Abstract: A rotor includes a circular rotor core, a plurality of ? magnets, and ring-shaped Z magnets. The rotor core has a plurality of magnet holding sections formed radially with a rotating shaft as the center. The ? magnets are contained in and held by the magnet holding sections such that the same magnetic poles of adjacent magnets face each other in a circumferential direction of the rotor core. The rotor core is such that N-poles and S-poles are alternately formed in a circumferential direction of an outer circumferential surface of the rotor core. The Z magnets are such that N-poles and S-poles are alternately formed circularly on an opposed face of the auxiliary magnet facing an end face of the rotor core in a direction of the rotating shaft.

Abstract: In a permanent magnet motor, projections each include a second projecting portion and a first projecting portion separated away from a side surface of a permanent magnet. When the first projecting portion has a total length L1 in an axial line direction and a height t1, and when the second projecting portion has a total length L2 in the axial line direction and a height t2, (L1×t1)>(L2×t2) is satisfied. As a result, the permanent magnet motor capable of reducing vibration noise of the motor by reducing irregular rotation, reducing decrease in motor torque, and further reducing increase in motor physical size can be obtained.

Abstract: A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied.

Abstract: A first brush holder is assembled to a core-side connection plate by inserting a slit insertion portion into a slit from an outer circumferential side of the core-side connection plate, and a radial outside position of the first brush holder to the core-side connection plate is regulated by both sides in a circumferential direction of a first slit being inserted into a pair of guiding grooves. A radial outside position of the brush holder is regulated by being fixed to a counter-core-side connection plate by press-fitting a convex portion provided on a counter-core-side of the first brush holder into a second slit of a counter-core-side connection plate. A second brush holder is assembled to the counter-core-side connection plate from an outer circumferential side of the counter-core-side connection plate, and a radial outside position is regulated by the core-side connection plate.

Abstract: A power generation device of the present invention includes: a first magnet member; a second magnet member having its N-pole reversely disposed to an N-pole of the first magnet member; a center yoke capable of horizontally shifting and disposed between the first magnet member and the second magnet member; a coil disposed at the outer circumference of the center yoke; and a drive member horizontally shifting while holding the first magnet member and the second magnet member. The drive member and the center yoke horizontally shift in a first direction. After the horizontal shift of the center yoke in the first direction stops, the drive member further horizontally shifts in the first direction, and the center yoke horizontally shifts in a second direction opposite to the first direction.

Abstract: A Halbach magnetic array is disclosed, including a plurality of first and second magnetic units alternately arranged in a width direction, wherein: each first magnetic unit includes first magnetic groups and first magnetic columns alternately arranged in a length direction, each first magnetic group includes four first magnetic bars arranged in a 2*2 matrix; each second magnetic unit includes second magnetic groups and second magnetic columns alternately arranged in the length direction, each second magnetic group includes four second magnetic bars arranged in a 2*2 matrix; each first magnetic column is magnetized in a height direction, and each second magnetic column is magnetized in a direction opposite to the height direction. A magnetic suspension vibration damper is also disclosed.

Abstract: A motor assembly is provided for powering a blower operable to generate fluid flow. The motor assembly includes a motor, a controller assembly, and a flow director. The motor includes a rotor rotatable about an axis. The rotor includes a rotatable support body, a plurality of arcuately spaced apart magnets, and a magnet retention ring at least in part securing the magnets relative to the support body. The controller assembly includes a controller and a controller case at least substantially housing the controller. The controller extends lengthwise to present opposite first and second sides at least in part spaced from the controller case. The flow director and the controller case cooperatively direct fluid received from the blower along a flow path that at least in part extends along each of the first and second sides of the controller.

Abstract: A rotary machine including a rotary shaft rotatably disposed in a casing is provided. The rotary machine includes an end plate disposed at one end side of the casing in the axial direction. The rotary machine includes a recess section formed in the end plate and recessed toward the inside of the casing. The rotary machine includes a through hole formed in the recess section and through which one end section of the rotary shaft is inserted. The rotary machine includes a shaft grounding device which is provided in the recess section. The shaft grounding device is brought into contact with the one end section of the rotary shaft which is inserted through the through hole, and eliminates a shaft voltage generated in the rotary shaft.

Abstract: Exemplary embodiments advantageously enable use of the structure of an interior magnet machine to emulate the function of a synchronous reluctance machine. In exemplary embodiments, a rotor for an electric machine, comprises a first magnet, a second magnet, a first non-magnetic region located between a first end of the first magnet and a second end of the second magnet, the first non-magnetic region having a first magnetic permeability value, a second non-magnetic region located radially between the first magnet and an edge of the rotor, the second non-magnetic region having a second magnetic permeability value, the second magnetic permeability value being relatively lower than the first magnetic permeability value, and an intrusion extending radially from an edge of the rotor and into the first non-magnetic region. An azimuthal width of one of the non-magnetic regions is larger than the azimuthal width of the other non-magnetic region.