Wound strip machine
An electric machine. The electric machine includes one or more edge wound strips including a first strip. The one or more strips have a plurality of openings. The first strip has a plurality of turns, and an opening of a turn of the first strip overlaps an opening of an adjacent turn, to form a portion of a fluid channel of a plurality of fluid channels. The turn and the adjacent turn abut against each other at the overlapping openings.
1. An electric machine comprising one or more edge wound strips including a first strip, the one or more strips having a plurality of openings, the first strip having a plurality of turns, an opening of a turn of the first strip overlapping an opening of an adjacent turn, to form a portion of a fluid channel of a plurality of fluid channels, the turn and the adjacent turn abutting against each other at the overlapping openings.
2. The electric machine of claim 1 , wherein the electric machine is a radial gap electric machine.
3. The electric machine of claim 1 , wherein a subset of the openings are narrow and a subset of the openings are wide.
4. The electric machine of claim 1 , comprising:
a stator having a stator core comprising the one or more edge wound strips, and
a rotor,
the rotor having a fluid passage.
5. The electric machine of claim 1 , further comprising a manifold having a manifold channel in fluid communication with the fluid channel.
6. The electric machine of claim 1 , further comprising a flow director.
7. The electric machine of claim 1 , comprising the first strip and a second strip co-wound with the first strip.
8. The electric machine of claim 1 , wherein:
the one or more edge wound strips further include a second strip,
the first strip has a plurality of substantially identical openings,
the second strip has a plurality of substantially identical openings, and
an opening of the first strip differs in shape and/or size from an opening of the second strip.
9. The electric machine of claim 1 , further comprising a sealant between the turn and the adjacent turn, and/or within a fluid channel of the plurality of fluid channels.
10. The electric machine of claim 1 , wherein:
the one or more edge wound strips further include a second strip concentric with the first strip, wherein:
the first strip is configured as a back-iron portion of a stator core of the electric machine; and
the second strip has a plurality of teeth, and is configured as a tooth portion of the stator core.
11. The electric machine of claim 10 , further comprising bonding agent and/or thermal interface agent, between the first strip and the second strip.
12. The electric machine of claim 1 , further comprising an enclosure, wherein a portion of an interior surface of the enclosure forms a portion of wall of a fluid channel of the plurality of fluid channels.
13. The electric machine of claim 1 , further comprising a winding, wherein a portion of the winding comprises insulated conductors packed with a void fraction of less than 12%.
14. The electric machine of claim 1 , comprising a stator core comprising the one or more edge wound strips, the electric machine further comprising a winding, and a potting compound, filling a void between the stator core and the winding, the potting compound having a thermal conductivity of at least 0.5 W/K/m.
15. The electric machine of claim 1 , wherein the first strip is composed of a non-isotropic magnetic material, and
the first strip includes a tooth portion of a stator of the electric machine, and a magnetic permeability tensor of the first strip has, within a tooth of the stator, a substantially radial eigenvector, the substantially radial eigenvector corresponding to a greatest eigenvalue of the magnetic permeability tensor of the first strip; or
the first strip includes a back-iron portion of a stator of the electric machine, and a magnetic permeability tensor of the first strip has, within the back-iron portion of the stator, a substantially azimuthal eigenvector, the substantially azimuthal eigenvector corresponding to a greatest eigenvalue of the magnetic permeability tensor of the first strip.
16. The electric machine of claim 1 , wherein the plurality of fluid channels includes:
a first fluid channel,
a second fluid channel, and
a third fluid channel,
the first fluid channel and the second fluid channel both being:
substantially axial, or
substantially radial,
the third fluid channel connecting the first fluid channel and the second fluid channel, the third fluid channel being not parallel to the first fluid channel and the third fluid channel being not parallel to the second fluid channel.
17. The electric machine of claim 1 , wherein:
the first strip includes a back-iron portion of a stator of the electric machine, and a magnetic permeability tensor of the first strip has, within the back-iron portion of the stator, a substantially azimuthal eigenvector, the substantially azimuthal eigenvector corresponding to a greatest eigenvalue of the magnetic permeability tensor of the first strip; and
the stator includes a tiled or multi-piece tooth portion, wherein a magnetic permeability tensor of the tooth portion has a substantially radial eigenvector, the substantially radial eigenvector corresponding to a greatest eigenvalue of the magnetic permeability tensor of the tooth.
18. The electric machine of claim 1 , comprising:
a rotor; and
a stator, inside the rotor, having a stator core comprising the one or more edge wound strips.
19. The electric machine of claim 18 , wherein the one or more edge wound strips further include a second strip concentric with the first strip, wherein:
the first strip is configured as a back-iron portion of a stator core of the electric machine; and
the second strip has a plurality of teeth, and is configured as a tooth portion of the stator core.
20. The electric machine of claim 1 , comprising a magnetic core comprising:
a first core portion comprising the one or more edge wound strips; and
a second core portion, coaxial with and abutting against the first core portion.
21. The electric machine of claim 1 , wherein the one or more edge wound strips are configured to provide a specific heat transfer of between 0.02 W/cm 3 /C and 1 W/cm 3 /C.
22. The electric machine of claim 1 , wherein the first strip comprises a plurality of bending notches.
23. An electric machine fluid cooling jacket comprising:
one or more edge wound strips,
a plurality of fluid channels, and
a manifold;
the one or more edge wound strips including a first strip, the one or more edge wound strips having a plurality of openings, the first strip having a plurality of turns, an opening of a turn of the first strip overlapping an opening of an adjacent turn, to form a portion of a fluid channel of the plurality of fluid channels, the turn and the adjacent turn abutting against each other at the overlapping openings, and the manifold having a manifold channel in fluid communication with the plurality of fluid channels.