Wound strip machine
An electric machine. The electric machine includes one or more face 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 face 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 an axial 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 face 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 face 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 face 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 face 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 , further comprising:
a first manifold around the outside of a first face wound strip of the one or more face wound strips, and
a second manifold inside the first face wound strip,
the second manifold being in fluid communication with the first manifold.
19. The electric machine of claim 1 , further comprising:
a first manifold around a first portion of the outside of a first face wound strip of the one or more face wound strips,
a second manifold around a second portion of the outside of the first face wound strip, and
an interior flow cavity inside the first face wound strip,
wherein the electric machine is configured to cause fluid flowing into an inlet port of the first manifold to flow:
through the first face wound strip into the interior flow cavity, and
from the interior flow cavity through the first face wound strip into the second manifold.
20. The electric machine of claim 1 , comprising a magnetic core comprising:
a first core portion comprising the one or more face 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 face 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 , further comprising:
a first manifold extending around the outside of a first face wound strip of the one or more face wound strips,
a second manifold extending around the outside of the first face wound strip, and
wherein:
the openings form a plurality of feed passages and a plurality of cooling passages,
the first manifold and the second manifold are configured to cause fluid flowing into an inlet port of the first manifold to flow:
inward through a first subset of the feed passages,
through the cooling passages to a second subset of the feed passages, and
from the second subset of the feed passages to an outlet of the second manifold.
23. An electric machine fluid cooling jacket comprising:
one or more face wound strips,
a plurality of fluid channels, and
a manifold;
the one or more face wound strips including a first strip, the one or more face 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.