Abstract: A drive motor for a suction device or a machine tool in the form of a handheld power tool or a semi-stationary machine tool, wherein the drive motor includes a stator having an excitation coil assembly and a rotor having a motor shaft, which is rotatably mounted around a rotational axis on the stator or with respect to the stator by means of a bearing assembly, wherein the rotor is received in a rotor receptacle of the stator, the inner circumference of said receptacle having grooves which extend along longitudinal axes that run parallel to the rotational axis and have insertion openings which are open towards the rotational axis and are provided for inserting excitation coils of the excitation coil assembly and are closed by groove covers, wherein the groove covers are in engagement with the engage-behind contours of the grooves at their opposite longitudinal sides, each of which extends along the longitudinal axis of the respective groove, said longitudinal axis being transverse to a transverse spacing betw

Abstract: A bearing unit includes: a thrust damper extendable in an axial direction of a shaft placed in a gearbox, the movement of which toward one side in the axial direction is regulated; a shaft receiver component held by the thrust damper on the other side of the thrust damper in the axial direction; a metal holder that holds the shaft receiver component in such a manner as to be detachable in the axial direction; and an oilless metal held by the metal holder and placed on the other side of the shaft receiver component, in which the thrust damper, the shaft receiver component, the metal holder, and the oilless metal are integrated all together before being incorporated into the gearbox.

Abstract: A method and apparatus serve to mount a calibrated encoder assembly to an electric motor so that a sensor output signal waveform produced by the calibrated encoder assembly is aligned with a back electromotive force (BEMF) waveform of the electric motor. The calibrated encoder assembly is fixed to an alignment plate, which is attached to the electric motor. The electric motor is rotated using a servo driven functional tester and the BEMF waveform of the electric motor is measured. The sensor output signal waveform is measured, and the alignment plate is adjusted relative to the electric motor to align the sensor output signal waveform to the BEMF waveform. The alignment plate is secured to the electric motor in the adjusted orientation.

Abstract: Aircraft electric motors include a motor unit having a rotor and a stator. The stator includes a plurality of windings and cooling channels arranged to provide cooling thereto. A drive unit is configured to drive operation of the motor unit. A cooling system includes a working fluid arranged within a cooling fluid flow path, wherein the cooling fluid flow path includes a liquid cooling path configured to direct flow of the working fluid through, at least, the cooling channels of the motor unit and a vapor cooling path configured to direct flow of the working fluid through the drive unit and a separator arranged upstream of each of the liquid cooling path and the vapor cooling path and configured to direct a liquid portion of the working fluid into the liquid cooling path and configured to direct a vapor portion of the working fluid into the vapor cooling path.

Abstract: The present disclosure provides a compact bionic eye device based on a two-degree-of-freedom electromagnetically-driven rotating mechanism, which can be used as a vision sensor of bionic robots such as humanoid robots. The compact bionic eye device includes a rotor, stator cores, windings, an angular displacement camera, a spherical hinge pressing block, a stator connector, a camera, a spherical hinge, a camera connector, a rotor connector and an outer spherical shell. According to the compact bionic eye device of the present disclosure, the rotor is driven to achieve limited rotation with pitching and yawing degrees of freedom by regulating a current of the windings of four stators. By adopting a two-degree-of-freedom of electromagnetically-driven rotating mechanism which is compact in structure, the bionic eye device of the present disclosure can achieve a human eye size, and provides important foundation for practical application of bionic eyes in humanoid robots.

Abstract: A rotor for an electric motor includes a ring portion and a hub portion. The ring portion contains a permanent magnet material and is configured to at least partially rotate about at least a portion of a stator of the electric motor. The hub portion is configured as a fan including two or more blade elements each being connected to the ring portion. The blade elements encompass two or more axial air passages. An electric motor including the rotor, a pump device and a household appliance each including the electric motor, as well as a method of producing the rotor, are also provided.

Abstract: The synchronous reluctance motor includes: an annular stator core having slots; and a cylindrical rotor core-having, for each magnetic pole, slits formed by arc-shaped openings which are convex toward a cylinder center and whose apexes are positioned on a q axis. The nth arc that is an inner edge of the opening close to the cylinder center has an arc center point on the q axis at a distance D(n) from-the rotor core. Where the radius of the nth arc with respect to the arc center point is denoted by R(n) and a ratio k(n) is defined as D(n)/R(n), the values of the ratios k(1) to k(n) are determined such that 0.20?k(nmax)?0.37 and k(nmax)< . . . <k(n)< . . . <k(1)<1 are satisfied and a slope a is in a range of (?0.92/nmax)?a?(?0.71/nmax).

Abstract: The electric machine includes a rotor and an internal stator operatively coupled to the rotor. The internal stator further includes a back iron having a bearing and a plurality of teeth, a plurality of ring coils wound around the back iron, a central hub, and a plurality of connectors that connects the central hub to the back iron. The back iron is made of a first material and at least one connector is made of a second material that is different from the first material.

Abstract: An electric tool includes a motor. The motor includes a stator core and a rotor. The rotor rotates with respect to the stator core. The rotor includes: a rotor core having a circular cylindrical shape; a plurality of permanent magnets; and an output shaft. The output shaft is held inside the rotor core. The plurality of permanent magnets are arranged as spokes around a center of the rotor core.

Abstract: A motor includes a stator, a rotor, and a cover. The rotor is disposed inside the stator with a gap left with respect to the stator. The rotor is provided to be rotatable with respect to the stator. The stator includes a plurality of coils, a plurality of teeth, and a coupling portion. Around the plurality of teeth, the plurality of coils are respectively arranged via an insulator. The coupling portion is located closer to the rotor than the plurality of coils. The coupling portion couples at least some adjacent ones of the plurality of teeth. The cover is formed mechanically integrally with the insulator. The cover is disposed to face at least a space inside the coupling portion along a rotational axis X of the rotor. The cover closes the gap.

Abstract: A rotary machine includes a rotating shaft, a housing that surrounds a portion of the rotating shaft and has an initial pressure therein and a gas seal that pumps gas out of the housing to reduce pressure in the housing to an operating pressure that is less than the initial pressure.

Abstract: A linear motor includes a magnetic assembly and a coil assembly having at least one coil positioned to magnetically engage the magnetic assembly for linear displacement between the magnetic assembly and the coil assembly. The linear motor further includes an encoder strip attached to one of the magnetic assembly and the coil assembly and an encoder reader attached to the other one of the magnetic assembly and the coil assembly to read the encoder strip during the linear displacement between the magnetic assembly and the coil assembly.

Abstract: The present invention provides an apparatus for sensing rotor location, the apparatus comprising: a central shaft; a magnet coupled to the central shaft; a sensor portion is disposed correspond to the magnet; wherein the sensor portion comprising a substrate, a first group including a first Hall sensor and a third Hall sensor disposed on the substrate, and a second group including a second Hall sensor and a fourth Hall sensor, the first Hall sensor and the third Hall sensor are arranged to overlap in a radial direction about the central shaft and the second Hall sensor and the fourth Hall sensor are arranged to overlap in a radial direction about the central shaft.

Abstract: An electric motor having a rotor with an axis of rotation and an annular stator surrounding the rotor, the stator extending along an axial direction parallel to the axis of rotation and having a first end face and a second end face pointing in opposite axial directions. The stator has exactly two stator teeth extending from an annular circumferential surface that runs between the end faces of the stator, in a radially inward direction to the rotor and facing one another in relation to the axis of rotation, a first stator slot and a second stator slot, which faces the first slot in relation to the axis of rotation, extending along the circumferential surface, between the stator teeth.

Abstract: A cooling system for an electric motor includes means for mixing water with cooling air applied to the motor. The water is preferably provided as a mist of water droplets sprayed into cooling air e.g. cooling air generated by a propulsive element being driven by the motor.

Abstract: A motor and a fan are provided. The motor has a stator assembly, two mutually independent rotor assemblies, and two mutually independent rotating shaft assemblies. The stator assembly has a stator core and two groups of mutually independent windings. The rotor assemblies are oppositely and coaxially arranged on two axial sides of the stator assembly and form an axial air gap with the stator assembly. The two rotor assemblies are configured to rotate independently. The two mutually independent rotating shaft assemblies are coaxially connected with the two rotor assemblies, respectively, and protrude in a direction of the same side away from the stator core along the axial direction of the motor.

Abstract: An object of the present invention is to provide a sealing member that provides high sealability in a coolant flow path. A rotating electrical machine includes a stator core around which a winding is wound, a stator frame that supports the stator core, a housing that is disposed outside the stator frame and forms a flow path space with the stator frame, and a sealing member that is disposed between the stator frame and the housing. The housing includes a mounting portion on which the sealing member is mounted. The sealing member includes a base portion that is in contact with the housing and the stator frame, and an attachment portion that protrudes from the base portion and is inserted to the mounting portion of the housing.

Abstract: A stator core includes a core back having an annular shape around a central axis, teeth extending outward from the core back in a radial direction, and an inner peripheral surface located inside the core back in the radial direction and extending from an upper end to a lower end of the core back around the central axis. The core back includes a plastically deformable portion having an annular shape around the central axis and disposed below the core back in the axial direction. At least a portion of the plastically deformable portion has a different distance from the central axis than another portion of the core back.

Abstract: An induction-type AC electric motor system has a variable frequency motor (VFD) drive having at least two outputs, the VFD drive coupled to be powered by a solar input and to power the motor with a switching device in a first setting. With the switching device in a second setting, a run winding of the AC electric motor couples to an AC input and a start winding of the AC motor couples through a capacitor and start switch to the AC input. The system is configured to, upon determining motor start, put the contactor in first setting and use the VFD drive to continue running the motor, and, when the AC motor is not rotating, the system is configured to periodically measure available solar power and to start the AC motor if the available solar power exceeds a first threshold power determined sufficient to run the AC motor.

Abstract: An electric motor with a deep-drawn motor housing including a flange adjoining an opening, the flange being polygonal or substantially polygonal in cross section with flange corners each including a screw-on point, each of the flange corners includes two embossments which define a bending edge of the motor housing between the screw-on point and an opening of the motor housing.