Axial slip ring assembly for an electric motor

A separately excited motor (SEM) rotor to enable a power transfer defining an axis of rotation, the SEM rotor comprising:

• a rotor shaft, wherein the rotor shaft rotates about the axis of rotation;
• a laminate, wherein the laminate is connected to the rotor shaft and wherein the laminate rotates with the rotor shaft;
• a coil winding, wherein the coil winding is wound within the laminate;
• a gear, wherein the gear is mounted to the rotor shaft and wherein the gear rotates with the rotor shaft;
• an axial slip ring assembly, the axial slip ring assembly including:
• a slip ring housing, wherein the slip ring housing is mounted to the rotor shaft and wherein the slip ring housing rotates with the rotor shaft;
• a first slip ring, wherein the first slip ring is disposed within the slip ring housing, wherein the first slip ring rotates with the slip ring housing, wherein the first slip ring is connected to the coil winding of the SEM rotor, and wherein the first slip ring is perpendicular to the axis of rotation;
• a second slip ring, wherein the second slip ring is disposed within the slip ring housing, wherein the second slip ring rotates with the slip ring housing, wherein the second slip ring is connected to the coil winding of the SEM rotor, wherein the second slip ring is perpendicular to the axis of rotation, and wherein the second slip ring is positioned radially outward from the first slip ring;
• a brush housing, wherein the brush housing includes an axial brush housing face and wherein the axial brush housing face is perpendicular to the axis of rotation;
• a static structure, wherein the static structure is stationary and wherein the brush housing is mounted to the static structure;
• a plurality of brushes, wherein the plurality of brushes is disposed within the brush housing;
• a plurality of springs, wherein the plurality of springs is disposed within the brush housing and wherein the plurality of springs apply an axial force along the axis of rotation to urge the plurality of brushes to urge the plurality of brushes to apply a constant axial force against the first slip ring and the second slip ring;
• and
• a power source, wherein the power source supplies a current to the plurality of brushes,
• wherein the plurality of brushes transfers the current from the power source to the first slip ring through the coil winding to the second slip ring,
• wherein the first slip ring transfers the current to the coil winding, and
• wherein the current in the coil winding creates a magnetic field, rotating the SEM rotor about the axis of rotation.

An axial slip ring assembly for enabling a power transfer in a separately excited motor (SEM) rotor including a rotor shaft and a coil winding, the SEM rotor defining an axis of rotation, the axial slip ring assembly comprising:

• a slip ring housing, wherein the slip ring housing is mounted to the rotor shaft of the SEM rotor and wherein the slip ring housing rotates about the axis of rotation;
• a first slip ring, wherein the first slip ring is disposed within the slip ring housing, wherein the first slip ring rotates with the slip ring housing, wherein the first slip ring is connected to the coil winding of the SEM rotor, and wherein the first slip ring is perpendicular to the axis of rotation;
• a second slip ring, wherein the second slip ring is disposed within the slip ring housing, wherein the second slip ring rotates with the slip ring housing, wherein the second slip ring is connected to the coil winding of the SEM rotor, wherein the second slip ring is perpendicular to the axis of rotation, and wherein the second slip ring is positioned radially outward from the first slip ring;
• a brush housing, wherein the brush housing includes an axial brush housing face, wherein the axial brush housing face is disposed perpendicular to the axis of rotation;
• a static structure, wherein the static structure is stationary and wherein the brush housing is mounted to the static structure;
• a plurality of brushes, wherein the plurality of brushes is disposed within the brush housing;
• a plurality of springs, wherein the plurality of springs is disposed within the brush housing and wherein the plurality of springs applies an axial force along the axis of rotation to urge the plurality of brushes to urge the plurality of brushes to apply a constant axial force against the first slip ring and the second slip ring;
• and
• a power source, wherein the power source applies a current to the plurality of brushes,
• wherein the plurality of brushes transfers the current to the first slip ring through the coil winding to the second slip ring,
• wherein the first slip ring transfers the current to the coil winding, and
• wherein the current in the coil winding creates a magnetic field, rotating the SEM rotor about the axis of rotation.