Abstract: An electric motor and winding method that improves its characteristics of torque and speed. An improved electric motor that provides higher power density and safety features by a novel winding architecture. Since the new winding architecture does not affect the measures, design or materials of the electric motor there is no need for any special manufacturing process or extra cost. Therefore the improved electric motors are smaller, lighter and cheaper than the same power size conventional electric motors as in other prior arts. The improved electric motor provides redundancy features against failure.

Abstract: A rotor core has first and second core parts in an axial direction. The first and second core parts have first and second magnet insertion holes in which rare earth magnets are disposed. A width of the first magnet insertion hole is wider than the second magnet insertion hole. The first core part has one or more slits elongated in the radial direction, the number of which is N1 (?1), on a radially outer side of the first magnet insertion hole. The second core part has no, one or more slits elongated in the radial direction, the number of which is N2 (?0), on a radially outer side of the second magnet insertion hole. N1>N2 is satisfied. A ratio of a length of the second core part in the axial direction to that of the rotor core is greater than or equal to 70% and less than 100%.

Abstract: The present invention relates to an improved structure of a core-bobbin assembly without using a support ring, an O-ring, and a gasket which support and cool the core-bobbin assembly of a motor for a vehicle, so that a weight decreases, and a heat transfer area increases. The present invention also relates to a motor cooling method using the same. In the present invention, an outer circumference sheath (210) is added to a bobbin to cover an entirety of a core outer circumferential portion (110) including a cooling surface press-inserted into and in contact with a housing, that is, a recessed outer circumferential surface (120) formed on the core outer circumferential portion (110).

Abstract: A method for constructing a lamination for a rotary electric machine includes forming an annular lamination from a ferrous core material having a first relative magnetic permeability. The lamination defines through-openings, e.g., for permanent magnets or conductors. Peripheral bridges of the core material extend between the through-openings and an outer or inner diameter surface of the lamination. The method includes diffusing an alloy material having a second relative magnetic permeability into the bridges to form austenitic bridges, with the second relative magnetic permeability being less than the first relative magnetic permeability. A rotary electric machine includes a stator and rotor. A vehicle includes a rotary electric machine connected to the battery pack and to road wheels, and having a rotor and/or a stator constructed in accordance with the method.

Abstract: A rotating field machine, in particular an electric motor with a stator and a rotor, is configured with a motor control for controlling the rotation and the rotational speed n of the rotor of the rotating field machine, wherein the motor control integrally includes an oscillation sensor system in order to acquire actual measurement values of oscillations of the rotating field machine depending on the rotational speed n.

Abstract: A VCM (voice coil motor) is disclosed, the VCM including: a rotor including a lens-accommodating, both ends opened cylindrical bobbin and a coil block including a coil wound on a periphery of the bobbin; a stator including a cylindrical yoke formed with a lens-exposing opening, a plurality of magnets disposed inside the yoke and opposite to the coil block, and a housing disposed inside the yoke to fix the plurality of magnets; and an elastic member elastically supporting the bobbin.

Abstract: A compressor includes a rotor, a stator configured to rotate the rotor, a compressor unit configured to compress a refrigerant with rotation of the rotor, and a housing in which an internal space for housing the rotor, the stator, and the compressor unit is formed, wherein the rotor includes a rotor core that has an upper surface and a lower surface, an edge plate that covers the upper surface or the lower surface, and a fixing member that fixes the edge plate to the rotor core, a plurality of refrigerant holes through which the refrigerant passes are formed in the rotor core, an opening that allows the plurality of refrigerant holes to communicate with the internal space and a fixing member opening through which the fixing member penetrates are formed in the edge plate, and a thickness portion is formed between the opening and the fixing member opening.

Abstract: An electromagnetic propulsion system is provided. The system comprises first and second pluralities of stator coils wound about first and second axes, a plurality of support structures, first and second couplers that surround portions of the first and second pluralities of stator coils, and first and second pluralities of sets of rotor coils wound about axes that are parallel to the first and second axes. The stator coils are configured to receive electric current through an outside controller selecting appropriately coupled stator sections or through a sliding electrical contact system or bearing system to induce at least a first magnetic field. The plurality of support structures supports the first and second plurality of stator coils. The first and second couplers include notches and are oriented so that their notches pass over the plurality of support structures when the couplers move along the stator coils. The couplers may have an adjustable segment to close the notch.

Abstract: In an axial gap motor including a rotor and a stator placed apart in a direction of a rotation axis with respect to the rotor, the stator is formed by combination of a plurality of divided pieces containing cores and yokes in a circumferential direction of the rotation axis. A first end portion in the circumferential direction of a first divided piece as one of the divided pieces has a convex portion projecting in the circumferential direction and a second end portion of a second divided piece in contact with the first end portion has a concave portion fitted with the convex portion, and the convex portion is provided in a position apart from a side portion of the first divided piece along the circumferential direction in a radial direction.

Abstract: A sheet-shaped insulating member including a thermoplastic resin fiber and an inorganic fiber is arranged on a surface of a magnet body. The insulating member is compressed while being heated to a temperature higher than or equal to a glass transition temperature of the thermoplastic resin fiber, so that the insulating member is thermocompression-bonded to the magnet body in a state in which the inorganic fiber is elastically compressed. A magnet is thus formed. With the magnet arranged in a slot of a rotor core, the magnet is heated to a temperature higher than or equal to the glass transition temperature of the thermoplastic resin fiber. This causes the inorganic fiber to restore elasticity, so that the magnet is fixed to the rotor core.

Abstract: A rotating electric machine including a rotor including a rotor core arranged coaxially with a stator core via an air gap formed between the stator core and the rotor core, and a plurality of permanent magnet groups each forming one magnetic pole, A flux barrier is formed between one set of permanent magnets adjacent to each other in the circumferential direction in each permanent magnet group forming one magnetic pole. A pair of ribs is formed of regions of the rotor core between the flux barrier and the one set of permanent magnets. A first slit is formed in a region of the rotor core on the air gap side in a radial direction of the each permanent magnet group, and an end portion of the first slit on the flux barrier side is positioned between extension lines of the pair of ribs.

Abstract: A permanent magnet auxiliary synchronous reluctance motor includes a stator portion and a rotor portion. The stator portion includes a stator core and a winding embedded in the stator core. The stator core is provided with a stator tooth and a stator slot. The rotor portion is provided inside the stator portion; a rotor body of the rotor portion is provided with a plurality of permanent magnet slot groups which are evenly arranged along a circumferential direction of the rotor body; each of the permanent magnet slot groups is provided with multiple layers of permanent magnet slots; a distance between end portions of adjacent permanent magnet slots between adjacent permanent magnet slot groups is less than or equal to a width of a stator tooth boot of the stator tooth, and the number of slots per pole and per phase of the motor is two or three.

Abstract: A rotating electric machine includes a rotor having a rotor core, a stator having a stator core and a stator coil, a first rotating shaft member having a first flange portion and a first shaft portion, a second rotating shaft member having a second flange portion and a second shaft portion, and a fastening device that fastens the first and second rotating shaft members, in a condition where the rotor core is sandwiched between the first and second flange portions, from opposite sides of the rotor core in an axial direction.

Abstract: An electric machine, characterized by two partial machines, each of which has a housing with a bottom-side end wall, in which in each case a stator and a rotor having a hollow rotor arm is accommodated, the two housings being arranged adjacent to one another with their bottom side end walls, with a common distribution device being provided in a cavity between the two housings for distributing a coolant that is used to cool the rotors and which is coupled with at least one housing-side inlet via which the coolant is supplied, and at least one housing-side outlet via which the coolant is discharged, and which is formed to distribute the coolant supplied into both hollow rotor arms and to guide the coolant flowing back from it to the at least one outlet.

Abstract: A transport apparatus including a housing, a drive mounted to the housing, and at least one transport arm connected to the drive where the drive includes at least one rotor having at least one salient pole of magnetic permeable material and disposed in an isolated environment, at least one stator having at least one salient pole with corresponding coil units and disposed outside the isolated environment, where the at least one salient pole of the at least one stator and the at least one salient pole of the rotor form a closed magnetic flux circuit between the at least one rotor and the at least one stator, and at least one seal configured to isolate the isolated environment where the at least one seal is integral to the at least one stator.

Abstract: An electric drive assembly for operation with a component of a work vehicle having an SAE standard hydraulic pump/motor mount includes an electric machine having a shaft and a mounting flange. An adapter housing defines an interior space between a component mounting flange and an electric machine mounting flange. The electric machine mounting flange is sized and configured to mate with the mounting flange of the electric machine. The component mounting flange has a bolt hole pattern and a mounting pad each of a complementary size and configuration to that of the SAE standard hydraulic pump/motor mount. A gear set at least in part disposed in the interior space of the adapter housing is configured to effect a gear ratio change and transfer power between the shaft of the electric machine and a drive shaft.

Abstract: A motor and a rotor structure thereof are disclosed. The rotor structure includes a rotor core. The rotor core has a plurality of magnetic member units arranged around a periphery of the rotor core. Each magnetic member unit includes two first magnetic members and a second magnetic member. The two first magnetic members are obliquely arranged in a V shape relative to a center of the rotor core. The second magnetic member extends transversely between the two first magnetic members. Each first magnetic member has at least two permanent magnets that are arranged obliquely. The motor further includes a stator core covering the rotor core. The stator core has a plurality of stator windings arranged annularly. The stator windings correspond to the magnetic member units. The rotor structure has high structural strength, and the phenomenon of stress concentration is less obvious when the motor is running.

Abstract: A compound motor-generator system including a first motor-generator and a second motor-generator. The first motor generator includes a stator having a set of three-phase field windings and a first rotor disposed inside and coaxial with the stator and configured to rotate relative to the stator. The second motor-generator includes a rotational stator and a second rotor coupled to a common shaft with the rotor of the first motor-generator and disposed inside and coaxial to the rotational stator. The rotational stator is configured to rotate relative to the second rotor and at a higher rotational speed than the second rotor.

Abstract: The present disclosure provides a motor, including a housing having an accommodating space, a vibrator and a stator that are accommodated in the accommodating space. One of the vibrator and the stator includes a magnetic circuit structure, and the other includes a coil assembly. The coil assembly includes an iron core and a first drive coil and a second drive coil that separately sleeved on two ends of the iron core in a vibration direction of the vibrator, a powering direction of the first drive coil being opposite to a powering direction of the second drive coil. In the present disclosure, the first drive coil and the second drive coil are subjected to Lorentz force in the same direction, thereby vibration of the motor may be improved.

Abstract: The present disclosure provides a rotor assembly and a motor. The rotor assembly includes a rotor body; the rotor body includes a plurality of magnetic poles centered on an axis of the rotor body and uniformly arranged along a circumferential direction of the rotor body; each of the magnetic poles includes a filling slot provided therein with a conductive and magnetic isolation material, the filling slots of the plurality of magnetic poles are orderly arranged along the circumferential direction of the rotor body; two ends of each of the filling slots along the circumferential direction of the rotor body have a first sidewall and a second sidewall respectively; the first sidewall of each of the filling slots and the second sidewall of the adjacent filling slot are parallel to each other, and together form a magnetic flux channel parallel to the q-axis.