Abstract: A permanent magnet carrier, which could be a rotor or stator of an electric machine, includes a first non-magnetic ring and a second non-magnetic ring. Between the rings are soft magnetic pole elements. The soft magnetic pole elements each connect to the first and second non-magnetic rings and the soft magnetic pole elements are separated from each other by the first and second non-magnetic rings. Permanent magnets are disposed between the soft magnetic pole elements.

Abstract: A motor for a driving device includes a rotor rotatable around a central axis, a stator facing the rotor, a busbar electrically connected to the stator, a busbar support to hold the busbar, a terminal bar including a first end electrically connected to the busbar, the terminal bar including a connection terminal at a second end and that is to be electrically connected to the driving device, and a seal to be attached to the driving device and located between the busbar and the connection terminal. The seal portion includes a through-hole into which the terminal bar is press-fitted.

Abstract: The present invention relates to a fault-tolerant modular permanent magnet assisted synchronous reluctance motor (PMaSynRM) and provides a modular winding connection method. The modular winding connection is to change the positions of inlet and outlet coils based on the slot electrical potential star vectogram. Then, each module has a separate set of winding and the left and right relative distribution will be adopted on the winding connection. The invention has the advantages of modularization in structure, high independence between the modules, effectively avoiding overlapping of magnetic lines between the modules, and improving fault tolerance and reliability of the motor. The invention has the advantages of modularization in structure, high independence between the modules, magnetic decoupling between the modules, and improvement of fault tolerance and reliability of the motor.

Abstract: The present disclosure provides a motor rotor and a permanent magnet motor. The motor rotor includes a rotor body. In a section perpendicular to a central axis of the rotor body, a first slot side has a first and a second endpoint, and a second slot side has a third and a fourth endpoint. A distance from a connecting line between the first endpoint and the third endpoint to a center of the rotor body is denoted by h1, a radius of the rotor body is denoted by R, and h1 and R satisfy 0.96?h1/R?0.99. A connecting line between the first endpoint and the center of the rotor body is a first connecting line, a connecting line between the third endpoint and the center of the rotor body is a second connecting line, and an included angle between the two connecting lines is denoted ? and satisfies: 3.7°???5.6°.

Abstract: A rotor for a rotary electric machine, including: a stack of magnetic laminations each having openings, the superposition of these openings within the stack forming slots, at least some of the openings having, on at least part of their periphery, friction reliefs, electrically conducting bars made of a first material, received in at least part of the slots and coming to bear via at least one principal face against said reliefs.

Abstract: The present disclosure provides a molding method, a manufacturing method and a molding device for a radially anisotropic multipolar solid magnet, a micro-motor rotor using this magnet, and a component for a motor. A mold core is removed from a mold, and oriented poles, the number of which is the same as that of poles of a radially anisotropic multipolar solid cylindrical magnet, are arranged outside the mold. The sum L of widths or arc lengths of top ends of all the oriented poles is greater than or equal to 0.9?D, where D is the outer diameter of a mold sleeve. The magnet production method breaks through the dimensional restriction to the manufacturing of radially anisotropic multipolar magnets in the prior art, and can produce radially anisotropic multipolar magnets having an inner diameter or diameter less than 3 mm or even less for high-precision micro-motors.

Abstract: A rotor includes: a rotor core; a plurality of plate-shaped magnets forming multiple poles, each arranged in the rotor core with a pair of magnetic pole faces thereof being positioned in a direction intersecting with the radial direction of the rotor core; and a plurality of voids formed in the rotor core, each arranged in contact with the magnetic pole face that is located on a side closer to the central axis of the rotor core, of each of the magnets forming multiple poles.

Abstract: A motor assembly includes a motor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.

Abstract: Methods and systems for cooling an electric motor are provided. An electric motor cooling system, in one example, includes a stator at least partially surrounding a rotor and an inner passage extending axially through the rotor and including an inlet and an outlet. The cooling system further includes an outer passage including an inlet in fluidic communication with the outlet of the inner passage and an outlet in fluidic communication with an inlet of the inner passage and a phase change material in the inner passage and the outer passage.

Abstract: A permanent magnet machine includes a machine housing and a stator disposed within the machine housing. The machine housing has an inner surface that extends between a first housing end and a second housing end along a central longitudinal axis. The stator has a stator core having an exterior surface and an interior surface, each extending between a first face and a second face along the central longitudinal axis. The stator core defines a plurality of openings that extend from the first face towards the second face.

Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.

Abstract: A rotating electrical machine is equipped with a rotor and a stator. The rotor includes a magnet unit and a rotor core retaining the magnet unit. The rotor core is made of a stack of annular core plates and an annular end plate mounted on an end of the stack of the core plates. The end plate has a deformable wave shape. The stack of the core plates and the end plate has formed therein through-holes extending through a length thereof. Bar-shaped fastening members, such as rivets, which have flanges on ends thereof are inserted into the through-holes with the flanges pressing the end plate to elastically deform the wave shape of the end plate, thereby tightly gripping the stack of the core plates in the lengthwise direction. This minimizes concentration of stress on the core plates to eliminate a risk of damage or breakage of the rotor.

Abstract: A magnetic pole module, an electric motor rotor and a method for manufacturing the electric motor rotor are provided. The electric motor rotor includes a rotor yoke and multiple magnetic pole modules disposed on the rotor yoke, each of the magnetic pole modules including a base plate, a housing, and a pair of magnetic pole units that are accommodated in an accommodating space formed by the base plate and the housing and have opposite polarities, and a pair of magnetic pole units in each of the magnetic pole modules are spaced apart from each other by a first distance in a circumferential direction of the rotor yoke. The electric motor rotor can give consideration to the properties, such as cogging torque and torque pulsation, of a generator, the protection of magnetic poles and the mechanical fixation of the magnetic pole.

Abstract: According to one aspect of the present disclosure, a rotor includes a shaft, a rotor core including an inner core and a plurality of outer cores, a mold resin unit covering, the mold resin unit, and a plurality of permanent magnets. The mold resin unit includes a gate mark in a region between the outer cores adjacent to each other in the circumferential direction, and the gate mark is provided in all regions between the adjacent outer cores or in a region between the outer cores, the region being adjacent to a region between the even-numbered adjacent outer cores in which the gate mark is not disposed in all the regions between the adjacent outer cores.

Abstract: A rotor structure of an electric motor includes a rotor and a stator. The rotor is fixed to a motor shaft and rotates integrally with the motor shaft. The stator is fixed around the rotor. The rotor includes a cylindrical rotor core coaxially press-fitted and fixed to the motor shaft, a pair of ring-shaped end surface plates disposed facing two axial end surfaces of the rotor core, and permanent magnets respectively housed in slots penetrating an outer peripheral portion of the rotor core in an axial direction. A plurality of openings in which the permanent magnets are exposed are formed in a circumferential direction in an outer peripheral portion of one of the end surface plates, and a ring-shaped cover that covers the openings is detachably attached to an outer end surface of the outer peripheral portion of the end surface plate.

Abstract: The invention relates to a rotor for a synchronous drive motor including a plurality of rotor poles, each rotor pole having at least two magnetic layers arranged radially one behind the other, and each magnetic layer comprising a series of magnetic elements, which are formed by injection molding or casting, and solidification of permanent magnetic material in rotor cavities. According to the invention, at least a portion of the magnetic elements each include projections protruding on both sides in their radially inner halves to introduce centrifugal forces of the magnetic elements into the rotor. This ensures an improved possibility of supporting the magnetic elements where sufficient rotor material is available. As a result, it is possible to prevent the radially outer ends of the magnetic elements from abutting the wall of the rotor as a result of centrifugal forces, which reduces the loads and deformations in the webs and bridges between the magnetic elements or to the outer edge of the rotor.

Abstract: The invention reduces tensile stress generated in the rotor core in a radial direction when a rotor core and a rotor support member are joined. A region in an axial direction (L) in which a melted joint portion (W2) for joining a rotor core (2) and a rotor support member (9) is formed is set as an axial joint region (JR). Among a plurality of corner portions (4c) of the permanent magnet (4), at least one corner portion (4c) that overlaps with the axial joint region (JR) when seen in a radial direction and that faces an outer peripheral surface (CP2) of the rotor core (2) is set as a specific corner portion (4s). Among facing surface portions (5p) of an inner wall portion of the magnet insertion hole (5) that face the corner portions (4c), the facing surface portion (5p) that faces the specific corner portion (4s) is set as a specific facing surface portion (5s).

Abstract: A rotary electric machine includes a rotor in which a plurality of permanent magnets are disposed along a rotation circumference and in which a magnetic pole of the permanent magnet is directed in a direction along a rotational axis and a stator in which a plurality of windings are disposed along the rotation circumference in a direction in which the magnetic pole of the permanent magnet is directed. The stator is formed in a direction in which a magnetic path from an end of the stator to an inside of the stator intersects a main magnetic flux direction from the rotor when the rotor is directed toward ends of first to four windings. A plurality of stators, provided along the rotational axis of the rotor, are respectively placed at positions at which gaps between the windings deviate from each other in a rotation circumference direction.

Abstract: A rotor unit for a brushless electric motor, incudes an annular rotor core surrounding a central axis, a plurality of magnet arrangements that are arranged around the rotor core in a circumferential direction of the rotor and that each have a convex outer peripheral face, an inner contact face, two axial end faces and two side faces pointing in the circumferential direction, a magnet holder having a number of holding portions which are each arranged between two adjacent magnet arrangements and are moulded onto a ring portion of the magnet holder. The holding portions are configured T-shaped in a cross section along a plane running transversely to the central axis and each have a shank portion and a head portion. The shank portion lies on the side faces of the magnet arrangements in a contact region and the head portion lies on the peripheral faces of the magnet arrangements.

Abstract: A motor includes a rotor with one or more magnets, a rotor core holding the one or more magnets, a spacer that contacts the one or more magnets, and a rotor holder. The rotor holder includes a holder lid portion and a holder tubular portion in a tubular shape extending to one side in the axial direction from a radially outer edge of the holder lid portion. The holder lid portion includes a holder first surface that extends radially inward from an inner surface of the holder tubular portion, a holder second surface that extends radially and is radially inward of the holder first surface and on the other side in the axial direction, and a connecting surface connecting the holder first surface and the holder second surface.