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.

Abstract: According to an aspect there is provided a motor (1) for a personal care device (10). The motor (1) comprises: a stator (2) comprising a stator surface; a rotor (3) comprising a rotor surface disposed opposite the stator surface; and a spacer (4) projecting between the stator surface and the rotor surface so as to define a minimum airgap between the stator (2) and the rotor (3). The spacer (4) is disposed on or at one of the rotor surface and the stator surface, and has a contact surface configured to engage with the other one of the rotor surface and the stator surface.

Abstract: The present disclosure provides a vibration device, including a stator, an eccentric wheel and an electromagnetic driving assembly. The eccentric wheel rotates around a rotating shaft relative to the stator. The electromagnetic driving assembly includes at least one magnetic element and an induction coil. The at least one magnetic element is disposed on the eccentric wheel. The induction coil corresponds to the magnetic element, and the induction coil is disposed on the stator. When a current is applied to the induction coil, the induction coil acts with the magnetic element to generate an electromagnetic force to drive the eccentric wheel to rotate around the rotating shaft, so that the vibration device generates a vibration. The rotating shaft is disposed on the stator.

Abstract: An electric machine comprises a rotor with a rotor body, wherein the rotor body has a plurality of poles each carrying at least one rotor winding formed from a plurality of conductor loops, wherein the poles extend in a radial direction of the rotor and the conductor loops running through grooves respectively formed between two adjacent poles, wherein a support element extending in the radial direction is respectively arranged in the grooves between the rotor windings of the adjacent poles, which support element, at a radially outer end of the groove, bears up against a thrust-bearing element arranged in a radially positionally-fixed manner between the adjacent poles, wherein the support element presses the conductor loops against the rotor body during a rotation and/or a temperature increase of the rotor.

Abstract: A planetary gear type enhanced motor comprises a stator with stator teeth and a rotor with rotor teeth engaged with each other, wherein the stator and the rotor are arranged eccentrically, and an output shaft is coaxially arranged on a central shaft of the stator and connected with a central shaft of the rotor through a transmission piece; and the two sides of the teeth of the stator teeth and the rotor teeth are provided with magnets, when the rotor teeth are engaged with the stator teeth, the magnetism and the magnetic poles of the magnets are changed to generate magnetic force to drive the rotor to revolve around the central shaft of the stator while rotating around the central shaft of the rotor, so that the transmission piece converts the motion of the rotor into the power of the output shaft.

Abstract: Provided are embodiments for a method and a hybrid axial/radial motor. Embodiments can include a central rotor that includes an axial segment, a first radial segment, and a second radial segment, wherein the first radial segment extends axially from a first side of the axial segment and the second radial segment extends axially from a second side of the axial segment, wherein the first side is opposite the second side. Embodiments can also include a stator adapted to receive the first radial segment or the second radial segment of the central rotor.

Abstract: An electric motor includes a rotor, a stator assembly, and a plurality of heat dissipation members fixed to the stator assembly and to release heat of the stator assembly.