Abstract: A thin displacement driving device includes a first movable plate, a second movable plate, an axial limiting unit, a first actuator and a second actuator. The axial limiting unit limits the moving direction of the first movable plate and the second movable late. The first actuator has a first shape memory alloy wire coupled to the first movable plate, and the second actuator has a second shape memory alloy wire coupled to the second movable plate. Movement of the first movable plate by the actuation of the first actuator will trigger movement of the second movable plate, and movement of the second movable plate by actuation of the second actuator will trigger movement of the first movable plate.

Abstract: A brushless DC motor, including a base, an insulation seat, a rotor assembly, a revolving shaft, a stator assembly, a control panel, a Hall circuit board, and an end cover. The revolving shaft is connected to the rotor assembly. The rotor assembly includes a housing and a plurality of magnetic tiles. The housing includes an inner wall and a cavity defined by the inner wall. The plurality of magnetic tiles is disposed on the inner wall. The stator assembly is disposed in the cavity. The base includes a cylindrical sleeve extending from a center of the base to the cavity of the rotor assembly. The stator assembly is connected to the cylindrical sleeve; two ends of the cylindrical sleeve are provided with a first bearing and a second bearing, respectively; and two ends of the revolving shaft are supported by the first bearing and the second bearing, respectively.

Abstract: A method is for calibrating a multiturn sensor for determining the position of a spindle of a clutch actuator, in which the multiturn sensor (5) is operatively connected to a magnetic field of a permanent magnet (12) in that the multiturn sensor (5) is combined with an actuator transmission (3) which comprises a spindle (9) bearing the permanent magnet (12).

Abstract: A lubrication system is disclosed. The lubrication system may include a mounting case, a tube internal to the mounting case that is configured to carry oil, and an electric motor. The electric motor may include a motor housing, a mounting flange extending radially from the motor housing, and an oil passageway in the mounting flange. The mounting flange may be mounted to the mounting case to provide a fluid connection between the oil passageway and the tube.

Abstract: An electric working machine and method for assembling the same that do not require specific jigs, so as to facilitate assembling work and reduce man-hours and production cost. A motor assembly is relatively inserted into a body casing, with a mounting base disposed behind a partitioning wall portion allowing a tubular fixture to project through an insertion hole toward the front of the partitioning wall portion, and a temporarily securing mechanism temporarily secures the motor assembly to retain the position of the motor assembly by automatically moving it in rotating and two orthogonal directions on a plane along the partitioning wall portion, so as to coaxially arrange the tubular fixture and insertion hole, and through-hole and screw hole of the mounting base for screwing the bolt. In such a temporarily secured state, the motor assembly is finally secured by screwing the bolt through the through-hole into the screw hole of the mounting base.

Abstract: A stator includes a connecting insulator member having a guide portion that connects two insulators, and jumper wires that are guided by the guide portion and connect two coils. The connection insulator member includes a lower layer insulator member, an intermediate layer insulator member, and an upper layer insulator member. The guide portion of the lower layer insulator member has a lower layer arc connecting part, the guide portion of the intermediate layer insulator member has an intermediate layer arc connecting part, and the guide portion of the upper layer insulator member has an upper layer arc connecting part. The intermediate layer arc connecting part is arranged above in the axial direction with respect to the lower layer arc connecting part in the axial direction, and the upper layer arc connecting part is arranged outside in the radial direction with respect to the intermediate layer arc connecting part.

Abstract: The dual rotor electric machine comprises: a stator having one or more slots and one or more stator windings. The dual rotor electric machine further comprises a first rotor arranged to rotate relative to the stator with an airgap therebetween. The first rotor comprises a first rotor excitation element having one or more magnetic pole pairs arranged to interact with the stator windings, the first rotor configured to rotate about an axis (X). The dual rotor electric machine further comprises a second rotor arranged to rotate relative to the stator with an airgap therebetween. The second rotor comprises a second rotor excitation element having one or more magnetic pole pairs arranged to interact with the stator windings, the second rotor being configured to rotate about the axis (X).

Abstract: A motor includes a sheet-like gasket for sealing the gap between a stator core and an encoder. The gasket has a structure including a metal plate and a sealing member covering the metal plate, and the gasket includes a first portion that is disposed at least between the end face on one end side of the stator core and the encoder and a second portion that has a structure including the sealing member with no metal plate and extends inward from the first portion to contact the projection.

Abstract: An electric motor includes a stator assembly, a rotor provided inside the stator assembly, and a heat sink to radiate heat from the stator assembly. The heat sink includes a base portion, and a heat radiating portion formed integrally with the base portion.

Abstract: An electric machine may include a housing having a front end and a back end where the front end is the primary mechanical coupling end. The electric machine may include a stator and a rotor arranged within the housing and a shaft connected to the rotor. The shaft may extend out of the front end of the housing and the shaft may be configured to be rotationally driven by the rotor or to rotationally drive the rotor. The electric machine may also include an electronic controller configured to control operations of the rotor and stator and the electronic controller may be mounted on the front end of the housing.

Abstract: A rotor assembly is provided for an electric motor. The rotor assembly includes: a cylindrical magnet member having magnetization in both axial and radial directions, the magnet member being formed from a moldable magnetic material; and an output shaft receivable within the magnet member. An inner surface of the magnet member and an outer surface of the output shaft have complementarily-engagable interface elements thereon to prevent or limit dislocation of the magnet member and output shaft, and at least one of the interface elements is formed by overmolding of the magnet member and output shaft with the other of magnet member and output shaft.

Abstract: A motor is provided. The motor includes a motor body and a rotor assembly. The rotor assembly includes a magnetic core mounted to a rotor shaft. The rotor assembly may include standoffs for accurately axially locating the magnetic core relative to rotor bearings. A drive nut adjustment arrangement may be provided. A mechanical interconnection between the drive nut and rotor shaft may be provided. A trailing end lead screw support may be provided. An axial preload arrangement may be provided to axially locate the rotor assembly within the motor body.

Abstract: A stator core for an electric motor may include a main body part formed by a plurality of stacked electromagnetic steel sheets, the main body part being provided with at least a first through hole extending axially with a first pin located in the first through hole. A first end cover is located at a first end of the main body part and connected to a first pin end of the first pin. A second end cover is located at a second end of the main body part and connected to a second pin end of the first pin. The connections of the first end cover and the second end cover to the first pin generate tensile stresses in the main body part to reduce core losses.

Abstract: According to the method, either CO2-free air or pure nitrogen N2 is pumped into the cooling circuit selectively depending on system parameters. To this end, the method ensures that the air injection rate is high enough that, under normal conditions, the hydrogen concentration in the tank and in the riser remains below 2% H2. On air injection, the oxygen O2 (>2 ppm) in the cooling water reacts with the copper in the cooling ducts and a layer of copper oxide forms on the inner walls of said ducts. No reaction is triggered by the injection of nitrogen N2. The CO2 content in the injection air and, at the same time, also the H2 content in the exhaust air are continuously measured and monitored, and an alarm is triggered if adjustable limit values are exceeded. The equipment for performing the method comprises an electronic control unit (65) with an input field and display as a control box, and a pump and a pipe circuit for drawing air in from the riser.

Abstract: A stator-housing unit for an electric machine includes a housing and a stator connected to the housing and bordering a bearing shield. A deviation in shape for increasing a coefficient of friction between the stator and the housing is realized on at least one subarea of a contact area between the stator and the housing, with the subarea being realized at one end of the stator.

Abstract: A motor includes a rotor including a shaft centered on a vertically extending center axis, a stator radially opposite to the rotor and including coils, a bearing supporting the shaft, and a bus bar assembly on an upper side in an axial direction of the stator. The bus bar assembly includes bus bars including a terminal portion connected to a lead wire drawn out from the coil and a bus bar holder holding the bus bars. The terminal portion includes a slit which extends axially downward and into which the lead wire is fitted. The width of the slit is narrower than the diameter of the lead wire.

Abstract: A temperature abnormality detection device that detects an abnormality in temperature of a motor including a stator and a rotor, includes: a temperature acquisition unit that acquires a temperature of a winding of the stator; a speed acquisition unit that acquires a rotation speed of the rotor; an allowable value changing unit that changes an allowable value for the temperature of the winding in accordance with an acquired rotation speed of the rotor; a comparison unit that compares an acquired temperature of the winding with a changed allowable value for the temperature of the winding based on the rotation speed of the rotor; and an output control unit that controls an external output of a warning signal indicating an excess of the temperature of the winding with respect to the allowable value.

Abstract: There is provided a motor having a sensor disposable at a desired position. The motor comprises a frame (11), a rotor, a stator, a substrate (40) provided in the stator, and a sensor (53) provided at the substrate (40). The substrate (40) includes a surface facing the rotor, and an outer peripheral portion (41). In the outer peripheral portion (41) of the substrate (40), a contact portion (49) contacting an inner peripheral portion (11a) of the frame (11) is provided. In the inner peripheral portion (11a) of the frame (11), contacted portions (11j), (11k) contacting the outer peripheral portion (41) of the substrate (40) are provided. In at least one of the contact portion (49) and the contacted portion (11j), (11k), a projecting portion (49j), (49k) projecting toward another of the contact portion and the contacted portion is provided.

Abstract: The cooling apparatus uses oil to cool an electric motor whose output is transmitted to a drive shaft inserted into a motor shaft via a reduction gear and a differential gear. An oil seal seals the gap between the differential case of the differential gear and the outer peripheral surface of the drive shaft. An oil passage is formed inside the drive shaft. An oil introduction hole is formed in the drive shaft on the side of the differential gear with respect to the oil seal to introduce oil from the differential gear into the in-drive-shaft oil passage. An oil outlet hole is formed in the drive shaft on the side of the electric motor with respect to the oil seal to draw oil from the in-drive-shaft oil passage to the inside of the motor shaft.

Abstract: The magnetic sheet for rotor with a non-through shaft with no recess at the center thereof is intended to be inserted between two half-shafts of the rotor. It comprises at least one locking means intended to cooperate with adjacent elements so as to prevent a relative movement of said sheet relative to the adjacent elements.