Abstract: A stepping motor includes a housing a supporting shaft a rotor, and a stator. The housing includes a first wall and a second wall facing each other. The supporting shaft is inserted into a through hole of the rotor and is held by the first wall and the second wall. The rotor has a first end face and a second end face in an axial direction of the rotor. The first end face and the second end face are separated from the first wall and the second wall, respectively. A lubricant fills between the through hole and the supporting shaft, and an oil repellent agent is applied at a predetermined first area of the first wall around the supporting shaft and a predetermined second area of the second wall around the supporting shaft.

Abstract: Power capacitors for AC motors are mounted diametrically on associated transmissions. The power capacitors are in one embodiment annular and in another embodiment, arcuate. By having power capacitors mounted on transmission housings diametrically, cooling of the power capacitors is facilitated for both air and liquid cooling.

Abstract: A rotary electric machine includes a frame; a stator whose stator-slot number Ns is 12; a rotor whose rotor-pole number Np is 8, the rotor being disposed inside the stator. The frame has a frame thickness T(?) at mechanical angle ?, with respect to a reference line that connects the inner circumferential center of the frame with an arbitrary point, other than the center, around the center that is circularly expanded in a Fourier series. The difference between the stator-slot number Ns and the rotor-pole number Np is k (=|Ns?Np|).

Abstract: An electrohydraulic aggregate for converting electric energy into mechanical energy, comprising an electric motor with a stator and with a rotor, comprising magnets or electric windings that produce electromagnetic fields, at least one connecting component for connecting the windings to at least one energy supply, with the connecting component extending through at least one through-hole, the through-hole is provided in an accommodating member accommodating electrohydraulic valves as well as at least one piston pump for the energy supply of a slip-controlled brake system, the piston pump being connected to the electric motor by a gear, and a rotor mounting support comprising at least two spaced rotor bearings, of which at least one so-called A-bearing supports a shaft in the accommodating member, and a so-called B-bearing that is supported in a pot-shaped motor housing.

Abstract: A rotary shaft of a rotor including a magnet with a plurality of magnetic poles arranged at equal intervals on an outer circumference is supported at both ends by bearings. By externally fitting the inner ring of one bearing to the rotary shaft and holding it to be immovable in an axial direction and loosely fitting the outer ring of the bearing into the support hole and positioning it with belleville springs which are in contact resiliently with both sides, the rotary shaft and the rotor are supported so that they are movable in an axial direction within a movement amount of not greater than 2 mm according to a movement of the bearing caused against spring forces of the belleville springs.

Abstract: A transmission includes a housing, an electric motor having a stator within the housing, and a member including a generally cylindrical portion that circumscribes at least part of the stator. The member cooperates with the housing to form an annular coolant flowpath therebetween, and the member includes a plurality of holes to provide radial inflow of coolant from the flowpath to the stator to provide significantly improved motor cooling compared to the prior art.

Abstract: A spindle motor, obtaining more accurate shaft perpendicularity and more convenient assembling process, is disclosed, the spindle motor includes: a rotor; a bearing housing into which the rotor is inserted; a base plate fixing the bearing housing; a housing guide fixed to the base plate, the housing guide having at least one vertical portion guiding an outer surface of the bearing housing; a printed circuit board mounted on the base plate; and a stator coupled to an outer surface of the bearing housing and supplied with power from the printed circuit board.

Abstract: Disclosed is a wire protection apparatus for a high frequency motor capable of preventing wires of a stator of the high frequency motor or wires of sensors from being exposed out of a clad cable while effectively preventing a part of wires from being damaged or disconnected due to external impact applied to wires when the high frequency motor is disassembled for exchanging a bearing or repairing work.

Abstract: When it is assumed that a thickness of a stator core is TSt as measured in parallel with an axial direction of a rotary shaft and a thickness of the fan housing is TFr as measured in parallel with the axial direction, a ratio of TSt/TFr is defined as 8% to 25%. With this arrangement, among frequency components included in vibration to be carried to the fan housing when a rotor is rotated, an over-all value of frequency components caused by cogging torque becomes smaller than an over-all value of frequency components caused by unbalance of the rotor. As a result, the vibration to be carried to the fan housing when a rotor is rotated may be restrained, in particular, when the rotor is rotated at a low speed.

Abstract: A step-by-step motor able to carry out up-and-down motion includes a housing, a connecting base, a top rod, a bearing, a connecting member, a magnet, a right-handed coil, a reverse coil and a bottom cover combined together. The housing has one side bored with an opening and its inner wall bored with a slide groove, and the connecting base has one outer wall formed with a slide rail for combining the connecting base on the outer wall of the housing. The bottom cover is provided with an annular recess for engaging the bottom edge of the housing, and then the bottom cover and the housing are firmly combined together by supersonic welding. By so designing, the step-by-step motor can be assembled conveniently, quickly and stably.

Abstract: A motor having: a rotor having a permanent magnet; and a stator having an air core coil, wherein a rotating magnetic field is formed between the permanent magnet and the air core coil by performing an energization control of the air core coil to rotate the rotor, a rotor shaft is made of one of a magnetic material and a nonmagnetic material, and a part or a portion to form the rotor excluding the permanent magnet and the rotor shaft is made of a nonmagnetic material.

Abstract: An electric power generation system is disclosed. The electric power generation system includes: an electric power generator having a rotor wherein the rotor is mechanically coupled to a shaft; and a case with a first chamber and a second chamber. The second chamber includes a primary mechanical turning source. The primary mechanical turning source can be removed to enable the attachment of a secondary mechanical turning source.

Abstract: A motor includes a first housing, a second housing, a rotor and a stator. The second housing is assembled with the first housing to form an accommodating space. The second housing has a flange adjacent to the connection between the first and second housings. The rotor has a shaft extended outwardly from the second housing and disposed in the accommodating space. The stator is disposed corresponding to the rotor and in the accommodating space. The flange has at least one protruding portion. When the second housing is assembled with the first housing, the protruding portion presses against the stator and is deformed so that the first and second housings are sealed.

Abstract: An electric power generation system is disclosed. The electric power generation system includes: a string configured to be pulled; a bobbin configured to rotate when the string is unwound from the bobbin as the string is pulled; an electric power generator having a rotor wherein the rotor is mechanically coupled to the bobbin; and a case with a sealed chamber and a chamber that can be opened. The sealed chamber protects the electric power generator from environmental contamination and the chamber that can be opened allows the string to be accessed.

Abstract: A permanent magnet electric generator includes a housing, and a stator and a rotor assembly disposed inside the housing. The rotor assembly is concentric with an axis of rotation. The rotor assembly has annular inner and outer rings concentric with the axis of rotation. The rotor assembly is adapted to be rotationally coupled to a shaft. The shaft is rotationally coupled to a source of rotational energy for rotating the rotor assembly. A plurality of permanent magnets are distributed on the inner surface of the outer ring. Each magnet has a north pole and a south pole aligned to the axis of rotation such that adjacent magnets have poles of alternating polarity. The permanent magnets are distributed circumferentially on the inner surface of the outer ring and in close proximity to the stator blocks. The stator assembly is at a static location with respect to and in close proximity to the rotor assembly.

Abstract: A vibration motor includes a housing, a stator (10) received in the housing (30) and a rotor (20) rotatably disposed in the stator. The stator includes two claw-pole assemblies (11) arranged back-to-back, and a shaft (23) being fixedly connected with the two claw-pole assemblies. The rotor includes a bearing (22) rotatably mounted around the shaft, a permanent magnet (26) mounted around the bearing, and an eccentric weight (24) fixedly attached to the permanent magnet. The eccentric weight includes a main body (240) and at least one inserting portion (244) having a density higher than that of the main body.

Abstract: A motor comprises a base, a rotor, a stator, and a circuit board. The base includes a sleeve. The stator includes at least one fastener. The sleeve has an inclined outer surface. The fastener extends to the circuit board and abuts the inclined outer surface to fasten the circuit board. A fan comprises a base, a hub, a shaft, a circuit board. The base has a sleeve. The hub comprises a plurality of blades disposed outwardly thereof. The shaft connects to the sleeve and is disposed in the hub. The stator has at least one fastener. The sleeve has an inclined outer surface. The fastener extends to the circuit board and abuts against the inclined outer surface to fasten the circuit board.

Abstract: A motor module includes a bearing housing having a loading base, an electric unit, a bearing, and a magnetic rotor unit disposed on the bearing. In addition, a protruding portion is extending from the loading base, and the electric unit includes a printed circuit board (PCB) and sensing elements, wherein the PCB is utilized for disposing the loading base thereon. Moreover, signal circuits and motor windings are formed on the PCB around the loading base, the sensing elements are disposed around the motor windings, and the bearing is disposed at the protruding portion. Besides, the magnetic rotor unit is disposed on the motor windings, keeping a gap with the PCB; therefore, when electric current passes the motor windings, the magnetic rotor unit and the motor windings generate a flux linkage induction, so as to drive the magnetic rotor unit to rotate relative to the PCB.

Abstract: An insulating motor housing includes first to fourth power supply elements stacked in their thickness direction to be spaced and insulated from each other and integrated with a housing body by insert molding. A power source connector using power source terminals of the second to fourth power supply elements as connector terminals is also integrated with the housing body.

Abstract: A cast rotor cage for an electric machine is provided. The rotor cage includes conductor bars, a first end ring, and a second end ring. The conductor bars have a first end and a second end. The first end ring is at the first end, while the second end ring is at the second end. The first end ring has a plurality of first fan blades, where at least some the first fan blades are asymmetrically disposed on the first end ring. Similarly, the second end ring has a plurality of second fan blades, where at least some the second fan blades are asymmetrically disposed on the second end ring.

Abstract: An electric motor includes a frame having opposing first and second ends, and an endshield coupled to at least one of the first frame end and the second frame end. The endshield includes a body and at least one endshield channel extending through the body and configured to carry a cooling fluid to facilitate cooling the electric motor.

Abstract: Devices and methods are provided for an improved motor stator. One embodiment for a stator includes a stator section having a first surface and a second surface each surface having a groove extending into the stator section and a slot extending longitudinally between the first and second surfaces. Insulated conductive wires are wound longitudinally around the stator section in the slots to form winding turns contained completely within each groove. A lead frame extends circumferentially along a surface of the stator and the insulated conductive wires couple to the lead frame. A thermoset material is supplied to the stator section to encapsulate the stator section including the lead frame and the insulated conductive wires, and to provide integral coolant flow passages.

Abstract: A motor includes a bracket that defines an exterior of the motor. A PCB is held within the bracket and has a circuit pattern and various elements mounted thereon. A stator is provided on the PCB and a rotor is provided within the stator. A shaft rotates together with the rotor to transmit a rotational force of the rotor. A stopper projects from an inside of the bracket to prevent the rotor from moving along the shaft.

Abstract: A motor includes a stator core that forms a magnetic path and has a plurality of tooth parts along a circumferential direction; a tooth provided in each tooth part to wind a coil there around; and an extension part alternated with the tooth part along a circumferential direction of the stator core, convexly extending to an inner radial direction.

Abstract: A motor end bell assembly includes an end bell having an opening in a face of the end bell for accessing terminals of the motor. An additional aperture in the end bell facilitates passage of a power cord through the end bell. A cover at least partially closes the opening and is formed as a single piece of material. The cover includes a tab for at least partially closing the aperture.

Abstract: A throttle body assembly including an end plate. The throttle body assembly includes a housing having an inner wall, and a motor located within the housing. The motor end plate is coupled to the motor and is in contact with the inner wall of the housing. The end plate includes an outer edge having at least one protrusion extending therefrom. The contact between the end plate and the housing is substantially only between the at least one protrusion on the outer edge of the end plate and the inner wall of the housing.

Abstract: For easy and accurate assembly of a motor actuator with improvement of quality and productivity, a motor accommodating hole (2) continuously having a pressure insertion hole (2a) and an insertion hole (2b), and a coupler (4) having terminals (5, 6) are integrally formed in a motor case (1), the insertion hole (2b) is open to face to an opening (1c) of the motor case (1), the terminals (5, 6) are arranged in parallel to a longitudinal axis (X-X) of the motor accommodating hole (2), flat base plates (7, 8) which are orthogonal to a longitudinal axis (Y-Y) of a motor (3) and have connection holes (7a, 8a) are arranged in an outer periphery (3a) of the motor (3), the terminals (5, 6) are inserted into the connection holes (7a, 8a) when inserting the motor (3) into the insertion hole (2b) and then the motor (3) is pressure-inserted fixedly to the pressure insertion hole (2a).

Abstract: Centering rings may be used to modify the combined resonance of a rotor and its support assembly to migrate the rotor critical speeds such that they can be engineered out of the rotor operating speed range. The centering rings of the present invention may be useful for any rotating electrical machinery, especially high speed aerospace applications, such as generators and starter-generators.

Abstract: Coil assemblies (2) of electric motors (1) produce heat that can be a disadvantage when needing the electric motor (1) for high precision positioning applications. To reduce the negative impact of the heat, the coils (26a, 26b, 26c) are arranged in an internally cooled housing (21). The housing (21) has an outermost layer (25) at least on the side lacing the magnet assembly (3) of the electric motor (1), the outermost layer (25) being made of low or non-electrically conductive, non-magnetic or nearly non-magnetic material. The outermost layer (25) prevents heat radiation to the environment.

Abstract: The present invention relates to a device functioning as an electric motor or actuator (100, 100?) comprising: a housing (110) encapsulating a rotating member (120, 120?), one or several arrangements (130, 130?) for generating a magnetic field due to electrical current, a displaceable shaft (140, 140?) at least partly having exterior grooves (141, 141?), said rotating member having a portion (121, 121?) with inner grooves (122, 122?) corresponding to grooves on said shaft (140, 140?). The device comprises at least one magnetic element (150, 150?) arranged on an outer surface of said rotating member (120, 120?) substantially perpendicular to extension direction of said grooves (122, 122?) for interaction with said arrangement (130, 130?) and rotating said rotating member.

Abstract: A direct-current motor includes a stator having a magnetic field system, a rotor disposed around the stator, a commutator which rotates together with the rotor, and power supply brushes which are urged in the axial direction by urging members so as to come into contact with the sliding contact surfaces. The rotor includes an armature core around which armature coils are wound, and a rotary shaft which rotates together with the armature core. The commutator has segments extending radially. The segments have sliding contact surfaces orthogonal to an axial line of the rotary shaft. At least a part of each power supply brush comes into contact with the sliding contact surface at a position further radially outward than the armature coil.

Abstract: [Object] To improve resistance of a motor device against an organic solvent and to suppress degradation in performance of the motor device with time. [Solving Means] In a motor device, an excitation magnet is formed using a hollow-cylinder shaped anisotropic bonded magnet 13. This bonded magnet 13 is press-fitted in a housing 12 and is held. The bonded magnet 13 is formed of a hollow-cylinder shaped anisotropic rare earth bonded magnet which is obtained by compounding an anisotropic rare earth magnet powder with a phenol-novolac type epoxy resin, followed by molding. The anisotropic rare earth bonded magnet 13 is press-fitted along an inner peripheral portion of the housing 12, and on an exposed surface layer of the anisotropic rare earth bonded magnet press-fitted in the housing, a coating layer is formed by an infiltration treatment using a polyamide-imide-based resin.

Abstract: A pneumatic tool includes a nonmagnetic tool housing; a cylindrical rotor inside the tool housing and rotatable in response to a flow of pressurized fluid through the tool housing; magnets mounted in the rotor; and a stator external to the tool housing. The stator is dimensioned to cooperate with the magnets to, upon rotation of the rotor, generate electrical current for supply to a load.

Abstract: After a winding machine connects a winding wire to a terminal pin, a slackening member is moved in a substantially horizontal direction substantially orthogonal to a direction of a terminal block being extended so as to be located on an orbit of the winding wire. Then, a led part of the winding wire radially between the terminal pin and teeth is extended to the teeth while in contact with a curved surface of a tip of the slackening member. That is, the led part is extended while bent in the substantially horizontal direction. After the winding wire is wound around the respective teeth, the slackening member is moved out of the orbit.

Abstract: The present invention improves a driving unit of a washing machine, for improving workability in fabrication of a rotor, and enhance rigidity of the rotor.

Abstract: An electrical machine including a brush holder disposed in a housing with the housing and/or housing cap having an elastic region which enables positioning of the brush holder relative to a commutator from outside the housing. An installation method for installing a brush holder of an electrical machine is also disclosed.

Abstract: A motor having a magnetic fluid bearing structure, which includes at least one bearing, at least one magnetic element and a magnetic fluid. The bearing is telescoped onto a shaft, and the magnetic element is coupled to the bearing. The magnetic fluid is kept between the bearing and the shaft. According to a magnetic effect between the magnetic fluid and the magnetic element, it is possible to prevent a lubricant of the bearing from leaking, and a hydraulic pressure of the magnetic fluid provides additional axial and radial supports to make the shaft rotate steadily relative to the bearing.

Abstract: In an armature of a motor, each of windings is wound around at least two of a plurality of tooth portions of a core to form at least two wound parts of the winding. A crossover of each winding, which connects between corresponding two of the at least two wound parts, is placed on one axial side of a ring portion of the core. A crossover relief space is axially recessed in an end surface of the ring portion on the one axial side. At least a portion of each crossover is received in the crossover relief space. Guides project on the other axial side of the core and guide winding terminal portions of the windings.

Abstract: An actuator for use with a fluid channel structure comprises: a stator assembly including stator yokes, and a coil; and a rotor assembly including a housing shaped in a circular hollow-cylinder, an output shaft inserted through the housing, a sleeve, a magnet fixedly attached to the sleeve, and a rotor case. In the actuator described above, the housing includes first and second sealing units having elasticity and disposed at the outer circumference of the circular hollow-cylinder. The first sealing unit makes elastic contact with a wall of a fluid channel of the fluid channel structure, and the rotor case has a cup-like configuration and has an open end portion thereof engaging with the circular hollow-cylinder portion of the housing and pressing on the elastic second sealing unit. Thus, hermetic structure is surely achieved.

Abstract: Certain exemplary embodiments can comprise a system, which can comprise an electric motor cooling fan. The electric motor cooling fan can be driven by an auxiliary motor distinct from an electric motor adapted to be cooled by the electric motor cooling fan. The system can comprise a motor enclosure of the electric motor. The motor enclosure can be configured in a predetermined ventilation pattern.

Abstract: A transaxle includes a case having an opening, a second rotating electric machine stored in the opening of the case and having a stators, a rear planetary gear stored in the transaxle case and connected to the second rotating electric machine, a transaxle rear cover sealing the opening and a bolt fixing the second rotating electric machine to the transaxle case. The stator has first and second thrust end faces defining an axial length thereof. The first thrust end face is pressed against an inner surface of the case.

Abstract: A rotary electric machine includes a frame; a stator whose stator-slot number Ns is 12; a rotor whose rotor-pole number Np is 8, the rotor being disposed inside the stator. The frame has a frame thickness T(?) at mechanical angle ?, with respect to a reference line that connects the inner circumferential center of the frame with an arbitrary point, other than the center, around the center that is circularly expanded in a Fourier series. The difference between the stator-slot number Ns and the rotor-pole number Np is k (=|Ns?Np|). Stress-relieving spaces are located in portions of the frame in an arrangement that does not have 90-degree mechanical angle rotational symmetry, in such a way that the sum P of inclusion ratios for the k-th component Tk and the Np-th component TNp, which are the Fourier series expansion coefficients for the frame thickness T(?) expressed by equation (2). P = ( T k + T N ? ? p ) / ? n = 0 ? ? T n × 100 ? [ % ] ( 2 ) , is less than 12%.

Abstract: An electro-hydraulic unit (10) in particular for an automotive vehicle anti-locking wheel device, includes two separate parts: an electronic control (13) within which is located particularly an electronic card (14), winding (17) as well as an electric motor (15) provided with a rotor and a stator, the motor being adapted to drive a pump, and a hydraulic unit (11), including the pump and a plurality of valves (12), the whole electronically directed by the control (13), the electro-hydraulic unit being characterized in that it further includes a ferromagnetic circuit (22) common at least partially to the stator and to the winding (17).

Abstract: The brushless motor includes: a housing; a stator which is stored and fixed in the housing; a rotor which is rotatably arranged inside the stator; a bracket which is fixed to the housing; a rotation detector which is fixed to the bracket and the housing and detects a rotation position of the rotor; and an engagement device which restrains movement of the bracket along a circumferential direction with respect to the housing.

Abstract: A ceiling fan motor includes a housing having top and bottom casing parts, a stator disposed in the housing and having a stator axis, and a rotor unit including a mounting seat that has an inner tubular wall surrounding the stator, an outer tubular wall spaced apart from and surrounding the inner tubular wall, and an intermediate web interconnecting the inner and outer tubular walls. The outer tubular wall is connected between the top and bottom casing parts. The rotor unit further includes a rotor supported by the inner tubular wall. The top and bottom casing parts have peripheral ends respectively overlapping top and bottom ends of the outer tubular wall.

Abstract: A sealed type motor-driven compressor includes a cylindrical motor housing and an annular stator core fastened to the interior of the motor housing. A method of assembling the compressor includes fastening the stator core to the motor housing by mechanically deforming at least one of the motor housing and the stator core. It is thus possible to set the fastening interference between the motor housing and the stator core to a sufficiently great level for suppressing loosening of the stator core with respect to the motor housing, which may otherwise be caused by a relatively high pressure produced by refrigerant gas.

Abstract: An electric motor has a hollow-cylindrical motor housing containing end plates that are mounted in the motor housing via respective centering flanges. A discrete electrical component is connected in parallel to electrical connections of the electric motor that are formed by contact elements disposed on the first end plate. The component is linked with at least one of the contact elements via a lead. The lead is inserted in a first, substantially V-shaped groove that tapers in the direction of insertion. The groove is provided with a recess into which the contact element can be pressed.

Abstract: An integrated motor and drive assembly includes a motor, a fan, and a drive unit. The motor is responsive to at least one drive signal. The fan is axially aligned with the motor and operable to generate a cooling flow. The drive unit is axially aligned with the fan and operable to generate the drive signal. The cooling flow traverses the motor and the drive unit.

Abstract: A vibration motor is provided, comprising a case having an upper case and a lower case which are coupled to each other; a shaft installed in the case while being supported by the case; a rotor rotatably coupled with the shaft; a stator arranged around the shaft; a first substrate installed on an upper surface of the lower case; and a second substrate coupled to a lower surface of the lower case and electrically connected to the first substrate. The lower case has a first opening and the first substrate is electrically connected to the second substrate through the first opening.

Abstract: A stepping motor is provided. The stepping motor comprises a bracket, a lead screw having a first side rotatably supported by the bracket, and a housing. A second side of the lead screw is disposed in the housing such that the lead screw is rotatably supported thereto, and a portion of the bracket is inserted into the housing so as to be coupled with the housing. A stator is installed in the housing, and a rotor is coupled with the lead screw to interact with the stator for rotating the lead screw.