A motor includes a rotor assembly and a stator assembly that accommodates the rotor assembly. The stator assembly includes a stator core including tooth portions corresponding to first to third phase currents, respectively, and a coil wound around the tooth portions and defining a Y connection of the first to third phase currents, a neutral point terminal defining a neutral point of the Y connection, and power terminals configured to communicate each phase current with the Y connection. The coil includes a primary winding and a secondary winding that are wound around each of the tooth portions, that are electrically connected parallel to each other, and that are connected to each of the power terminals.

A motor includes a rotor assembly and a stator assembly that accommodates the rotor assembly. The stator assembly includes a stator core including tooth portions corresponding to first to third phase currents, respectively, and a coil wound around the tooth portions and defining a Y connection of the first to third phase currents, a neutral point terminal defining a neutral point of the Y connection, and power terminals configured to communicate each phase current with the Y connection. The coil includes a primary winding and a secondary winding that are wound around each of the tooth portions, that are electrically connected parallel to each other, and that are connected to each of the power terminals.

An electric machine includes a stator and a rotor. The stator is disposed near to the rotor and has at least one first stator unit and at least one second stator unit. The first stator unit has a first tooth and a second tooth, and the second stator unit has a third tooth and a fourth tooth. The rotor has a rotating direction or a moving direction with respect to the stator. The first tooth and the third tooth are adjacently disposed to each other along the rotating direction or the moving direction. The protruding directions of the first tooth and the third tooth respectively form a first angle and a third angle with the radial direction of the rotor, and the first angle and the third angle are different.

The present invention provides a motor generator, and the motor generator comprises a permeability structure, a bearing, a hollow rotating shaft, a ringed clip and a rotatable guiding structure. The permeability structure comprises a primary permeability unit and a secondary permeability unit wherein the second permeability unit is stacked with the first permeability unit along an axial air-gap to form a symmetrical structure having a hollow shaft. The bearing is disposed inside the hollow shaft of the permeability structure. The hollow rotating shaft is passed through the hollow shaft of the permeability structure and disposed at another side of the bearing with respect to the permeability structure. The ringed clip is used for fixing the bearing and the hollow rotating shaft. The rotatable guiding structure is disposed inside the hollow rotating shaft for providing power source and transmitting signals.

The present invention provides a motor generator, and the motor generator comprises a permeability structure, a bearing, a hollow rotating shaft, a ringed clip and a rotatable guiding structure. The permeability structure comprises a primary permeability unit and a secondary permeability unit wherein the second permeability unit is stacked with the first permeability unit along an axial air-gap to form a symmetrical structure having a hollow shaft. The bearing is disposed inside the hollow shaft of the permeability structure. The hollow rotating shaft is passed through the hollow shaft of the permeability structure and disposed at another side of the bearing with respect to the permeability structure. The ringed clip is used for fixing the bearing and the hollow rotating shaft. The rotatable guiding structure is disposed inside the hollow rotating shaft for providing power source and transmitting signals.

A pump for a water-conducting appliance, the pump having an electric motor comprising: a rotor comprising a ferrite body with at least four magnetic poles, wherein the ferrite body has a lateral-circumferential magnetization; and a stator comprising a pole chain made of a stack of a plurality of straight transformer sheets and rounded to a circular configuration by bending the stacked transformer sheets, wherein the pole chain has a plurality of pole portions each comprising a pole tooth; and a plurality of winding cores attached to the respective pole teeth for accommodating coils of a three-phase winding comprising wires; wherein the wires of respective phases of the three-phase winding are routed spatially separated from each other and without mutual contact at an axial end surface of the pole chain between and along adjacent winding cores around the pole chain; and wherein the wires are supported and guided such that their positions relative to the pole chain are substantially maintained when the pole chain is rounded from its straight configuration to its circular configuration.

The rotation of the synchronous reluctance motor is controlled through energization of the winding with current of a phase having a ratio k between the total sum of radial-direction widths of the slits on the q-axis and a magnetic gap length, and having a lead angle β from the d-axis. Among the core layers, the radial-direction width, on the q-axis, of the core layer that lies at a position closest in the circumferential direction to a point P at which there intersect the outer periphery of the rotor and the straight line passing through the rotor center and drawn at an angle ψ=arctan(tan β/(1+0.2k)) from the d-axis, is larger than the radial-direction width of other core layers on the q-axis.

A reluctance motor is used in a compressor. The reluctance motor includes a rotor having a rotor core that has an annular outer circumference about an axis, having a plurality of magnetic poles along the outer circumference, and having no permanent magnet, and a stator including a stator core that surrounds the rotor from an outer side in a radial direction about the axis and a winding wound around the stator core in wave winding. Each of the plurality of magnetic poles has a first slit formed in the rotor core and a second slit formed on an inner side of the first slit in the radial direction. The stator core has a refrigerant passage through which refrigerant passes in a direction of the axis.

Homopolar linear synchronous machines (200) are provided herein that include a mover device (111). The mover device (111) includes a cold plate with ferromagnetic cores extending through slots in the cold plate. Layers of armature coils are located around the ferromagnetic cores on opposite sides of the cold plate. The mover device (111) further includes at least one field coil.

Homopolar linear synchronous machines (200) are provided herein that include a mover device (111). The mover device (111) includes a cold plate with ferromagnetic cores extending through slots in the cold plate. Layers of armature coils are located around the ferromagnetic cores on opposite sides of the cold plate. The mover device (111) further includes at least one field coil.