Metal ribbon stator and motor comprising same
View Patent ↗A stator made from a ribbon of metal having multiple layers of slit metal, and motors made therefrom are described. A ribbon having multiple layers of metal is formed into a stator such as by flattening or pleating the ribbon to form each pole of a stator having a plurality of stator teeth, or poles. The stator formed from the metal ribbon may be configured into any suitable type of motor, such as an axial transverse flux motor. A magnetic flux return may also be made out of metal ribbon.
1. A stator comprising:
a. a tape comprising:
i. a plurality of ribbon layers of flux conducting material, each ribbon layer comprising:
a ribbon width;
a first ribbon edge;
a second ribbon edge;
ii. a tape width extending from a first edge to a second edge,
iii. a tape length; and
iv. a tape thickness;
b. a plurality of stator teeth comprising;
i. formed portions of said tape;
wherein the formed portion of said tape comprises:
a tooth fold along the length of the tape to form a tooth that is adjacent a rotor; and
a return fold along the length of the tape that is adjacent a return,
wherein the first edge of the formed tape along the tooth fold is adjacent a rotor and the first edge of the formed tape along the return fold is adjacent a return;
wherein the first edge of the tape is adjacent said rotor and also adjacent the return and configured to conduct magnetic flux from the rotor to the return through said first edge;
wherein a magnetic flux passes from the rotor into the first edge along the tooth fold and out of the same first edge along the return fold into the return.
2. The stator of claim 1 , wherein the plurality of stator teeth comprise discrete stator teeth.
3. The stator of claim 1 , wherein the plurality of stator teeth comprise a gap within a tooth.
4. The stator of claim 1 , wherein the plurality of stator teeth comprise discrete stator teeth, wherein each discrete stator tooth is a flattened tape wound toroid.
5. The stator of claim 1 , wherein the plurality of stator teeth comprise two or more contiguous teeth, wherein at least two adjacent contiguous stator teeth are formed from a single length of said tape.
6. The stator of claim 1 , comprising a spacer between the plurality of ribbon layers.
7. The stator of claim 1 , wherein said plurality of stator teeth direct flux substantially radially through the first edge along the return fold to said return.
8. The stator of claim 1 , wherein said return is positioned between a first stator half and a second stator half.
9. The stator of claim 1 , wherein the stator is configured as an asymmetric stator.
10. An electric motor comprising a stator comprising:
a. a tape comprising:
i. a plurality of ribbon layers of flux conducting material, each ribbon layer comprising:
a ribbon width;
a first ribbon edge;
a second ribbon edge;
ii. a tape width extending from a first edge to a second edge,
iii. a tape length; and
iv. a tape thickness;
b. a plurality of stator teeth having edges and comprising;
i. formed portions of said tape;
wherein the formed portion of said tape comprises:
a tooth fold along the length of the tape to form a tooth that is adjacent a rotor; and
a return fold along the length of the tape that is adjacent a return,
wherein the first edge of the formed tape along the tooth fold is adjacent a rotor and the first edge of the formed tape along the return fold is adjacent a return;
wherein the first edge of the tape is adjacent said rotor and also adjacent the return and is configured to conduct magnetic flux from the rotor to the return through said first edge;
wherein a magnetic flux passes from the rotor into the first edge along the tooth fold and out of the same first edge along the return fold into the return.
11. The electric motor of claim 10 , wherein the return is configured with a first edge adjacent a first stator half and a second edge adjacent a second stator half, thereby, in use, magnetic flux passes from the first stator half into the first edge of the return fold, into and through the return and out of a second return edge into the second stator half.
12. The electric motor of claim 11 , wherein said rotor is positioned between the first stator half and the second stator half.
13. The electric motor of claim 10 , wherein the motor is a transverse flux motor.
14. The electric motor of claim 13 , wherein the transverse flux motor is an in-plane three-phase axial transverse flux motor.
15. The electric motor of claim 13 , wherein the transverse flux motor is a double in-plane three-phase transverse flux motor.
16. The electric motor of claim 13 , wherein the transverse flux motor is an axially stacked three-phase transverse flux motor.
17. The electric motor of claim 13 , wherein the transverse flux motor is a single phase transverse flux motor.
18. An electric motor of claim 11 , wherein the return provides mechanical support for the first and the second stator halves, wherein one of said plurality of stator teeth is cantilevered from the return.
19. The electric motor of claim 10 , wherein the plurality of stator teeth comprise a plurality of contiguous stator teeth, wherein at least two adjacent contiguous stator teeth are formed from a single length of said tape.
20. The electric motor of claim 10 , wherein the plurality of stator teeth comprise discrete stator teeth, wherein each discrete stator tooth is a flattened tape wound toroid.
21. The electric motor of claim 10 , comprising a single stator configured between a first rotor and a second rotor, thereby in use, flux flows into the single stator from both the first and second rotors.
22. The electric motor of claim 10 , wherein said plurality of stator teeth direct flux substantially radially through the first edge along the return fold to said return.
23. The electric motor of claim 10 , wherein the stator is configured as an asymmetric stator.