An integrated starter-generator (ISG) system includes a flux-regulated permanent magnet machine (PMM), a wound-field synchronous machine, and a control coil controller. The flux-regulated PMM includes a stationary portion having a control coil and a plurality of permanent magnets, and a rotating portion that includes rotating armature windings. The wound-field synchronous machine includes a stationary portion that includes a main armature winding and a rotating portion that includes a main field winding that receives excitation from the flux-regulated PMM. The control coil controller controls current supplied to the control coil of the flux-regulated PMM to selectively control magnetic flux presented to the rotating armature windings.

There is provided an electric motor comprising a rotor, a stator and a motor controller. The stator comprises a substantially cylindrical body, a plurality of teeth extending from the substantially cylindrical body in a radial direction, one or more first sets of electrical windings that are wound around said teeth and configured to drive the rotor, and one or more second sets of electrical windings electrically separate from the first set of electrical windings. The second set of electrical windings on the stator are electrically connected to the motor controller such that energy produced by the electric motor during a regenerative mode of operation in use is diverted to the second set of electrical windings on the stator for dissipating the energy produced in the regenerative mode.

The described technology relates to a rotor having a flux filtering function and a synchronous motor comprising the same. The rotor includes a rotor iron core, a plurality of permanent magnets and a plurality of conductor bars. The rotor iron core has a rotary shaft insertion hole, formed in the center thereof, into which a rotary shaft is inserted, a plurality of permanent magnet insertion holes being formed in the circumference of the rotary shaft insertion hole, and a plurality of conductor bar insertion holes are uniformly formed in a region between the plurality of permanent magnet insertion holes and the outer surfaces thereof. The plurality of permanent magnets are respectively inserted into the plurality of permanent magnet insertion holes, thereby forming N and S magnetic poles of the rotor. Additionally, the plurality of conductor bars are respectively inserted into the plurality of conductor bar insertion holes.

The described technology relates to a rotor having a flux filtering function and a synchronous motor comprising the same. The rotor includes a rotor iron core, a plurality of permanent magnets and a plurality of conductor bars. The rotor iron core has a rotary shaft insertion hole, formed in the center thereof, into which a rotary shaft is inserted, a plurality of permanent magnet insertion holes being formed in the circumference of the rotary shaft insertion hole, and a plurality of conductor bar insertion holes are uniformly formed in a region between the plurality of permanent magnet insertion holes and the outer surfaces thereof. The plurality of permanent magnets are respectively inserted into the plurality of permanent magnet insertion holes, thereby forming N and S magnetic poles of the rotor. Additionally, the plurality of conductor bars are respectively inserted into the plurality of conductor bar insertion holes.

Provided is an arrangement for an electrical machine having fractional slot topology, including: plural stator segments, each stator segment having plural teeth alternating with plural slots in a circumferential direction, each stator segment having at both circumferential ends a tooth portion; for each phase of plural phases a conductor wound in coils around teeth of the plural teeth, wherein the number of coils of any phase in any stator segment is the same as the number of coils of any other phase in this stator segment.

Provided is an arrangement for an electrical machine having fractional slot topology, including: plural stator segments, each stator segment having plural teeth alternating with plural slots in a circumferential direction, each stator segment having at both circumferential ends a tooth portion; for each phase of plural phases a conductor wound in coils around teeth of the plural teeth, wherein the number of coils of any phase in any stator segment is the same as the number of coils of any other phase in this stator segment.

An external winding controlled two-degree-of-freedom bearing-free switched reluctance motor includes a stator and a rotor. An edge portion of the rotor includes rotor teeth. The stator includes an external winding and a stator core. The stator core includes four suspension teeth distributed in x and y directions on the same circumference of the radial outer side of the rotor and magnetism isolating bodies connected to two adjacent suspension teeth, each suspension tooth includes, along the axial direction of the rotor, a permanent magnet sheet and magnetically conductive sheets symmetrically connected to two sides of the permanent magnet sheet, torque teeth are connected to the inner walls of the magnetism isolating bodies, and torque windings are wound around the torque teeth. The external winding includes x-direction control cores connecting two suspension teeth in the x direction to form two x-direction symmetrical closed paths.

An electric motor assembly comprising a stator having a plurality of stator lamination sheets. Each of the stator lamination sheets includes an annular body and a plurality of stator teeth extending radially inwardly from the annular body to an opening. A rotor is located in the opening. Each of the stator teeth defining a pocket with a dampening element located in the pocket. The dampening element comprises a material that is viscoelastic. The pocket and dampening element are located in a location of the stator tooth that has less magnetic flux than an adjacent area of the stator tooth.

An electric motor assembly comprising a stator having a plurality of stator lamination sheets. Each of the stator lamination sheets includes an annular body and a plurality of stator teeth extending radially inwardly from the annular body to an opening. A rotor is located in the opening. Each of the stator teeth defining a pocket with a dampening element located in the pocket. The dampening element comprises a material that is viscoelastic. The pocket and dampening element are located in a location of the stator tooth that has less magnetic flux than an adjacent area of the stator tooth.

A lamination for use in an integrated drive generator is formed from a plurality of plates having a body including a pair of opposed cylindrical surfaces. Non-cylindrical ditches are defined circumferentially intermediate the pair of cylindrical surfaces. A plurality of passages are formed in an outer periphery of the cylindrical surfaces including relatively large holes extending through a slot to the outer periphery. Grooves are formed intermediate the relatively large holes.