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US 12,374,976 B2Granted
Electric motor
AssigneeElectric Torque Machines, Inc.
InventorThomas F. Janecek
Life of this patent
Estimating the term…
Abstract
An electric motor includes a rotor and a stator formed by a plurality of stator phases. The stator phases include coils that extend fully about the motor axis of the motor. The stator phases further includes flux rings disposed on opposite axial sides of the coil and that are joined by axial returns. The stator phases electromagnetically drive rotation of the rotor on the motor axis.
Claims20
An electric motor comprising:
- a rotor configured to rotate on a rotational axis to generate a mechanical output, the rotor comprising a rotor body and a permanent magnet array;
- and
- a stator spaced radially relative to the rotor and disposed about the rotational axis, the stator comprising:
- a stator phase formed from a first pair of flux rings, a first coil disposed axially between the first pair of flux rings, and an annular array of axial returns extending between the first pair of flux rings to electromagnetically connect the first pair of flux rings;
- wherein a first flux ring of the pair of flux rings includes a plurality of first ring segments disposed circumferentially about the rotor axis, wherein each first ring segment of the plurality of first ring segments is spaced circumferentially from each adjacent first ring segment of the plurality of first ring segments by a first circumferential gap to form a plurality of first circumferential gaps in the first flux ring;
- and
- wherein the plurality of first ring segments are at least partially embedded in potting compound and the plurality of first ring segments are not directly connected to a common metallic link.
4 more elements
A stator phase for an electric motor, the stator phase comprising:
- a first flux ring having a plurality of first spurs disposed in a first annular array about an axis;
- a second flux ring having a plurality of second spurs disposed in a second annular array about the axis;
- a first coil disposed axially between the first flux ring and the second flux ring and extending annularly about the axis;
- an axial return extending between the first flux ring and the second flux ring, wherein a return array formed by a plurality of the axial returns extends about the axis;
- wherein the first flux ring is formed by a first laminate stack, the second flux ring is formed by a second laminate stack, and the axial return is formed by a third laminate stack;
- and
- wherein the stator phase includes a first laminate boundary on a first radial side of the stator phase and a second laminate boundary on a second radial side of the stator phase;
- and
- wherein the second laminate boundary is at least partially defined by the axial return.
6 more elements
An electric motor comprising:
- a rotor configured to rotate on a motor axis to generate a mechanical output, the rotor comprising a rotor body and a permanent magnet array;
- and
- a stator spaced radially relative to the rotor and disposed about the motor axis, the stator comprising:
- a first stator phase formed from a first flux ring, a second flux ring, a first coil disposed axially between the first flux ring and the second flux ring, and a first annular array of axial returns extending between the first flux ring and the second flux ring to electromagnetically connect the first flux ring and the second flux ring;
- wherein potting compound extends radially between a first radial compound edge and a second radial compound edge;
- wherein the second radial compound edge is disposed directly between the first annular array of axial returns and an inner wall of a stator housing of the stator at an axial location of the first flux ring;
- and
- wherein the first radial compound edge is disposed radially between a first laminate stack forming the first flux ring and the permanent magnet array.
5 more elements
An electric motor comprising:
- a rotor configured to rotate on a rotational axis to generate a mechanical output, the rotor comprising a rotor body and a permanent magnet array;
- and
- a stator spaced radially relative to the rotor and disposed about the rotational axis, the stator comprising:
- a stator phase formed from a first pair of flux rings, a first coil disposed axially between the first pair of flux rings, and an annular array of axial returns extending between the first pair of flux rings to electromagnetically connect the first pair of flux rings;
- wherein a first flux ring of the pair of flux rings includes a plurality of first ring segments disposed circumferentially about the rotor axis, wherein each first ring segment of the plurality of first ring segments is spaced circumferentially from each adjacent first ring segment of the plurality of first ring segments by a first circumferential gap to form a plurality of first circumferential gaps in the first flux ring;
- and
- wherein the plurality of first ring segments are at least partially embedded in potting compound and not connected together by metal laminate structure.
4 more elements
Dependencies are inferred from the claim text.