Abstract: There are presented various embodiments disclosed in this application, including methods and systems of arranging permanent magnets to switch from a first configuration designed for a first torque output to a second configuration designed for a second torque output.

Abstract: The invention relates to a nested winding for a slotless motor. The nested winding is formed by inner and outer windings which are nested together and have different inner and outer diameters, wherein the number of the inner and outer windings is n, same-phase coils are connected in parallel or in series, and the number n of the nested inner and outer windings is equal to or greater than two. Compared with the prior art, the nested winding has the following advantages: a potential difference between the coils connected in parallel can be effectively reduced, and accordingly, the loss of the winding is reduced, and the high-speed operating performance of the motor is improved.

Abstract: A rotor for an electrical machine comprises a rotor body having an external, axially extending magnet receiving surface for receiving at least one magnet thereon, and a flange mounting portion at at least one axial end of the magnet receiving surface. The flange mounting portion has a smaller external dimension (D1) than an external dimension (D2) of the magnet receiving surface so as to form a shoulder between the magnet receiving surface and the flange mounting portion. A magnet retaining flange is mounted over the flange mounting portion of the rotor body and located against the shoulder. The magnet retaining flange is retained against the shoulder by at least one lip of the flange mounting portion of the rotor body which extends radially outwardly over a radially inner portion of the magnet retaining flange. The lip by deforming an end face of the flange mounting portion.

Abstract: An iron core including a laminate of a plurality of fixed electromagnetic steel sheets, a laminate of alloy thin strips which is sandwiched between the laminate of the electromagnetic steel sheets, a fastening mechanism which penetrates the laminates of electromagnetic steel sheets and alloy thin strips, and a fixing base. The laminate of alloy thin strips reduces compressive and torsional forces acting on the laminate of alloy thin strips by using the iron core having a structure in which upper and lower portions of a laminate of alloy thin strips having nanocrystal grains are sandwiched together with laminates of amorphous alloy thin strips. Furthermore, a motor including a rotor and the above-described iron core is used.

Abstract: To cool field winding from its inner peripheral side and increase an insulation performance, salient-pole rotor (3) has rotor yoke (12) provided along rotation shaft (11), magnetic cores (13) protruding outward in radial direction from outer peripheral portion of rotor yoke (12) and arranged at regular intervals in circumferential direction, magnetic head (14) provided at radial direction outer side of magnetic core (13), and field winding (15) wound around outer peripheral surface of magnetic core (13) between rotor yoke (12) and magnetic head (14). And, insulating structure of ventilation path of salient-pole rotor (3) has ventilation groove (15a) opening to inner peripheral surface of field winding (15) and penetrating field winding (15) in radial direction, ventilation hole (14a) penetrating magnetic head (14) in radial direction and communicating with ventilation groove (15a), and stepped portion (15b) formed at portion, at magnetic head (14) side, of ventilation groove (15a).

Abstract: A first thrust bearing includes a first electromagnet and a first member. A second thrust bearing includes a second electromagnet and a second member. A magnetic force generated by the first electromagnet and the second electromagnet, and dynamic gas pressure generated by the first member and the second member due to rotation of a rotating shaft support an axial load of the rotating shaft.

Abstract: Noise caused by a gap between a rotor and a plate can be suppressed even when there are dimensional variations in members or assembly states. In a configuration of a stepping motor including front side and end side stator assemblies (200, 300), a rotor (400) provided with a rotor member (402) and a shaft (403) that are accommodated in the stator assemblies (200, 300), and a front plate (210) and an end plate (310) that are arranged on both sides of the stator assemblies (200, 300) in an axial direction, and are configured to couple the stator assemblies (200, 300), a projection (700) in an annular shape is provided on a surface of the front plate (210) facing the rotor member (402) to protrude toward the rotor member (402), a coil spring (800) that is interposed between the front plate (210) and the rotor member (402) is accommodated in the inner side of the projection (700), and the rotor (400) is urged toward the end plate (310) by the coil spring to be elastically pressed against the end plate (310).

Abstract: The invention relates to a brush module (10) for a rotating electric machine, in particular for a current-excited synchronous machine, the brush module (10) having at least two brushes (12) for establishing electrical contact with slip rings (11) of the machine, the brush module (10) having a housing device (13) and brush holders (14) for accommodating and supporting the brushes (12), wherein the housing device (13) has a collecting device (21) for collecting brush dust of the brushes (12). Alternatively, the housing device (13) is configured in such a manner that the brush holders (14) are spaced apart from each other, the housing device (13) at least partially forming an air gap between the brush holders (14) on a housing portion of the housing device (13) that faces slip rings (11).

Abstract: This motor includes a stationary portion including a stator; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, and including a shaft arranged to extend along the central axis. The stationary portion includes a bearing arranged to rotatably support the shaft, and a base portion arranged to hold the stator. The rotating portion includes a rotor hub portion arranged to extend in an annular shape around the shaft; a magnet directly or indirectly fixed to the rotor hub portion, and arranged opposite to the stator; a flywheel arranged axially above the rotor hub portion; and a seal portion arranged to have a thickness smaller than the thickness of the magnet. At least a portion of an outer circumferential surface of the rotor hub portion is a metal surface.

Abstract: A permanent magnet electric machine (PM machine) includes a rotor with rotatable magnets and a stator defining an air gap with the rotor. An actuator rotates the rotatable magnets at predetermined operating points through an angular distance sufficient for changing magnetic pole orientations of the rotatable magnets, and thus modifies magnetic flux linkage with stator windings across the air gap. Fixed magnets may be arranged around a circumference of the rotor. The actuator may be actively or passively driven. Flux-shunting elements are optionally disposed in the rotor to further modify the flux linkage. A gear set connected to torque transfer elements may be driven by the actuator to rotate the rotatable magnets. A vehicle includes drive wheels, a transmission, and the PM machine. A method controls magnetic flux linkage in the PM machine noted above.

Abstract: A motor electronics unit includes a printed circuit board having a first and a second side. An electrical conductor is connected to the printed circuit board. A heat sink is positioned proximate to the printed circuit board. A housing of a polymeric material includes: an endcap encapsulating the printed circuit board and covering an outer edge of the heat sink defining a heat sink first portion, with a second portion of the heat sink not covered by the polymeric material and extending through and outward from the endcap to transfer heat from the printed circuit board. A first section of the electrical conductor extends through and is partially encapsulated by the endcap. A connector body is integrally connected to the housing. A second section of the electrical conductor is exposed within a cavity of the connector body to electrically connect the printed circuit board to another component.

Abstract: A system includes a shaft body defining a longitudinal axis. A first internal fluid channel extends axially within the shaft body and includes an inlet opening through the shaft body for fluid communication of external fluid into the first internal fluid channel and an outlet opening through the shaft body for fluid communication of fluid from the first internal fluid channel to an area external of the shaft body. A second internal fluid channel extends axially within the shaft body and includes an inlet opening through the shaft body for fluid communication of external fluid into the second internal fluid channel and an outlet opening through the shaft body for fluid communication of fluid from the second internal fluid channel to an area external of the shaft body. The first and second internal fluid channels are in fluid isolation from one another within the shaft body.

Abstract: An electric motor and a rotor thereof are provided. The rotor includes a shaft and at least one rotating body fixed to the shaft. The rotating body includes a rotor core and a plurality of permanent magnets. An outer periphery of the rotor core has a plurality of spaced slots, each of which extends along an axial direction of the rotor. The rotating body further includes a plurality of axial arms molded to the corresponding slots and configured to fix the permanent magnets. Every two adjacent axial arms form an accommodation therebetween, and each permanent magnet is fixed to a corresponding accommodation.

Abstract: A printed circuit board and an electric filter. The printed circuit board is arranged to accommodate an electric circuitry on one side, and an electrically conductive material on the other side which forms a common ground point with the electric circuitry and a device contacting the conductive material. The electric filter for filtering electric signals of a DC motor includes a freewheeling diode coupled in parallel to the motor, a capacitor coupled in parallel to the motor, where a ground terminal of the capacitor is coupled to a chassis of the motor, a low pass filter including a ferrite bead and another capacitor is connected to each motor terminal (M+, M?), and a resistor-capacitor filter is coupled in parallel to the motor.

Abstract: An electrical machine comprising: a first rotor, the first rotor producing a first magnetic field having a first number of pole pairs; a second rotor comprising a plurality of pole pieces, the plurality of pole pieces being arranged to modulate the first magnetic field to produce a second magnetic field having a second number of pole pairs; a stator Comprising one or more windings arranged to produce a third magnetic field arranged to interact with the first number of pole pairs and the second number of pole pairs; wherein the interaction of the third magnetic field with the first number of pole pairs and the second number of pole pairs changes a torque ratio between the first rotor and the second rotor.

Abstract: This application relates to translating mechanical energy from a low-speed rotor to a high-speed rotor or vice versa in a magnetic gearbox. More specifically, this application discloses various embodiments of a coaxial magnetic gearbox with flux concentration Halbach rotors. In certain implementations, the device further comprises a circular back iron (or other ferromagnetic material) disposed concentrically along the axis of the cylindrical magnetic gearing device. In such embodiments, this flux concentration back iron (or ferromagnetic pole) improves the torque density and can also help retain the magnets in place.

Abstract: Systems and methods relate to a vertical takeoff and landing (VTOL) platform that can include a stator and a rotor magnetically levitated by the stator. The rotor and stator can be annular, such that the rotor rotates about a rotational axis. The stator can include magnets that provide guidance, levitation, and drive forces to drive the rotor, as well as to control operation of rotor blades of the rotor that can be independently rotated to specific pitch angles to control at least one of lift, pitch, roll, or yaw of the VTOL platform. Various controllers can be used to enable independent and redundant control of components of the VTOL platform.

Abstract: A discharging device for discharging electrical interference, in particular currents, from a rotor part of a machine, said rotor part in particular being a shaft, into a stator part (17) of the machine, the discharging device having a contact device (11) comprising a contact element (13) which is accommodated in an axially displaceable manner in a guide and which is acted on by a contact force device (15) for generating a shaft contact force (FW) in order to establish electrical contact between a shaft contact surface (19) of the contact element (13) and a rotor contact surface (20) of the shaft (18), wherein the guide has a stator contact surface (25) for forming an electrical connection with the stator part (17) and the discharging device has a guide contact force device (21) for generating a guide contact force (FF) between a guide contact surface (24) of the contact element (13) and the stator contact surface (25) electrically connected to the stator part (17).

Abstract: The disclosure herein includes an electric submersible pump assembly for pumping fluids from a wellbore, which electric submersible pump assembly may include: a pump; a housing coupled to the pump; a body disposed in the housing, wherein the body may have a central aperture, an outer surface, and a flow path disposed in the outer surface; and a shaft assembly disposed in the central aperture of the body, wherein the shaft assembly may have a central flow path disposed therethrough and a port in fluid communication with the central flow path, the central aperture of the body, and the flow path disposed in the outer surface of the body.

Abstract: A permanent magnet electric machine (PM machine) for a vehicle or other system includes a rotor assembly, fixed permanent magnets, a stator, an actuator, and one or more repositionable/moveable flux-shunting elements. The flux-shunting element is repositioned to control flux at specific operating points of the PM machine. The rotor assembly has a rotor coaxially surrounding and coupled to a rotor shaft. The permanent magnets are mounted to or in the rotor, and the moveable flux-shunting element is positioned between the rotor shaft and a respective one of the permanent magnets. Inboard and outboard ends of each respective permanent magnet may be oriented toward the rotor shaft and stator, respectively. The actuator selectively positions the moveable flux-shunting element at one or more operating points of the PM machine to vary reluctance in a magnetic circuit formed by the stator and rotor assembly.