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US 12,424,884 B2Granted
Transverse flux electric machine
AssigneeGraco Minnesota Inc.
InventorsTyler K. Williams, Thomas F. Janecek
Life of this patent
Estimating the term…
Abstract
A transverse flux motor is formed by a stator portion and a rotor portion. The stator portion includes one or more phase assemblies formed by flux ring plates axially bracketing coil wire windings. The flux rings include teeth that magnetically interact with circumferentially opposed and adjacent teeth to form flux paths transverse to the axis of rotation of the rotor assembly.
Claims20
A flux ring for a phase assembly of a stator of a transverse flux electric motor, the flux ring comprising:
- a ring body disposed about a motor axis;
- a plurality of trunks extending radially from the ring body;
- a plurality of branches supported by the plurality of trunks radially away from the ring body such that a plurality of return openings are formed between the ring body and the plurality of branches;
- a plurality of flux projections extending radially from the plurality of branches and away from the ring body;
- a first plurality of gaps each disposed circumferentially between adjacent flux projections of the plurality of flux projections;
- and
- a second plurality of gaps each disposed circumferentially between adjacent branches of the plurality of branches;
- wherein the second plurality of gaps are disposed asymmetrically about the motor axis such that a first pair of adjacent branches of the plurality of branches are spaced by a first circumferential gap, a second pair of adjacent branches of the plurality of branches are spaced by a second circumferential gap, and the first circumferential gap is larger than the second circumferential gap.
5 more elements
A phase assembly for a transverse flux electric motor, the phase assembly comprising:
- a first flux ring disposed about a motor axis;
- a second flux ring spaced axially from the first flux ring;
- a coil disposed axially between the first flux ring and the second flux ring;
- and
- a plurality of axial returns extending between the first flux ring and the second flux ring, wherein each axial return of the plurality of axial returns extends into a first return opening of the first flux ring and in a second return opening of the second flux ring;
- wherein the plurality of axial returns are disposed asymmetrically about the motor axis such that a first axial return of the plurality of axial returns is circumferentially adjacent to a second axial return of the plurality of axial returns and a third axial return of the plurality of axial returns and a first circumferential gap between the first axial return and the second axial return is greater than a second circumferential gap between the first axial return and the third axial return.
3 more elements
An electric motor comprising:
- a rotor which rotates about a motor axis;
- and
- a stator comprising at least one phase, each phase comprising:
- a first flux ring comprising a first plurality of trunks and a first plurality of flux projections that are supported by the first plurality of trunks, wherein the first plurality of trunks are unevenly arrayed circumferentially around the motor axis;
- a second flux ring comprising a second plurality of trunks and a second plurality of flux projections that are supported by the second plurality of trunks;
- and
- a coil that is coaxial with the motor axis and located directly between the first flux ring and the second flux ring, the coil configured to be energized to electromagnetically polarize the first plurality of flux projections with respect to the second plurality of flux projections;
- wherein the first plurality of trunks are unevenly arrayed circumferentially around the motor axis such that a first pair of adjacent trunks of the first plurality of trunks have a first separation distance circumferentially therebetween and a second pair of adjacent trunks of the first plurality of trunks have a second separation distance circumferentially therebetween that is different than the first separation distance.
5 more elements
Dependencies are inferred from the claim text.