Abstract: An electrical induction motor may include a stator with a plurality of circumferentially spaced slots, and N windings installed in the slots and each configured to be connected between two current inputs from an inverter, with a phase angle difference between the two current inputs equal to H×180°/N, wherein H=a harmonic of a current drive waveform supplied by the inverter to the windings. Each of the N windings may be installed in the plurality of slots to form a top layer of winding and a bottom layer of winding, with a phase angle of the current flowing through the top layer of winding in each slot being aligned with a phase angle of current flowing through the bottom layer of winding at a first, higher harmonic, and out of alignment at a second, lower harmonic.

Abstract: An electrical induction motor may include a stator with a plurality of circumferentially spaced slots, and N windings installed in the slots and each configured to be connected between two current inputs from an inverter, with a phase angle difference between the two current inputs equal to H×180°/N, wherein H=a harmonic of a current drive waveform supplied by the inverter to the windings. Each of the N windings may be installed in the plurality of slots to form a top layer of winding and a bottom layer of winding, with a phase angle of the current flowing through the top layer of winding in each slot being aligned with a phase angle of current flowing through the bottom layer of winding at a first, higher harmonic, and out of alignment at a second, lower harmonic.

Abstract: An electrical induction motor may include nine terminals configured to receive nine current inputs from nine output phases of a nine phase inverter. The motor may include nine windings connected to the nine terminals, and a plurality of contactors, wherein each of the plurality of contactors may be selectively opened or closed in a circuit including the nine windings to selectively connect the windings together in one of a mesh configuration or a star configuration. Each of the windings may be selectively connected between two of the nine current inputs, with a phase angle difference between the two current inputs of 40 degrees. Each of the contactors may be selectively opened or closed to establish a span value for the mesh configuration of two, with two being the number of inverter output phases between a terminal of one of the nine windings and a terminal of another of the nine windings connected to the one of the nine windings.

Abstract: An electrical induction motor may include nine terminals configured to receive nine current inputs from nine output phases of a nine phase inverter. The motor may include nine windings connected to the nine terminals, and a plurality of contactors, wherein each of the plurality of contactors may be selectively opened or closed in a circuit including the nine windings to selectively connect the windings together in one of a mesh configuration or a star configuration. Each of the windings may be selectively connected between two of the nine current inputs, with a phase angle difference between the two current inputs of 40 degrees. Each of the contactors may be selectively opened or closed to establish a span value for the mesh configuration of two, with two being the number of inverter output phases between a terminal of one of the nine windings and a terminal of another of the nine windings connected to the one of the nine windings.

Abstract: The present disclosure relates generally to an energy capture for an electric drive machine, and more particularly to systems and methods for capturing energy during braking of the electric drive machine. In some examples, the disclosure describes an energy capture device including at least two planetary gear assemblies. The first planetary gear assembly can be operatively coupled to an engine, and can engage and disengage, via a first overrunning clutch, a shaft coupled to a generator. The second planetary gear assembly can be at least partially fixed to the first planetary gear assembly, and can engage and disengage, via a second overrunning clutch, the shaft. The first overrunning clutch can disengage the shaft and the second overrunning clutch can engage the shaft during a braking period.

Abstract: The present disclosure relates generally to an energy capture for an electric drive machine, and more particularly to systems and methods for capturing energy during braking of the electric drive machine. In some examples, the disclosure describes an energy capture device including at least two planetary gear assemblies. The first planetary gear assembly can be operatively coupled to an engine, and can engage and disengage, via a first overrunning clutch, a shaft coupled to a generator. The second planetary gear assembly can be at least partially fixed to the first planetary gear assembly, and can engage and disengage, via a second overrunning clutch, the shaft. The first overrunning clutch can disengage the shaft and the second overrunning clutch can engage the shaft during a braking period.

Abstract: A series electric drive includes a cylindrical first rotor with a number of permanent magnets therein and an input linked to the cylindrical first rotor. The series electric drive further includes a cylindrical second rotor stacked radially within the cylindrical first rotor, the cylindrical second rotor being a wound rotor, and an output being linked to the cylindrical second rotor. A cylindrical stator is stacked axially relative to the first rotor, and a portion of the second rotor is stacked radially within the cylindrical stator, the cylindrical stator being a wound stator.