IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0291373
(2011-11-08)
|
등록번호 |
US-8405275
(2013-03-26)
|
발명자
/ 주소 |
- Calley, David G.
- Cole, Daniel S.
- Dyer, John M.
- Janecek, Thomas F.
- Williams, Tyler K.
|
출원인 / 주소 |
- Electric Torque Machines, Inc.
|
대리인 / 주소 |
Pillsbury Winthrop Shaw Pittman LLP
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
215 |
초록
▼
Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of laminated materials, for example laminated materials configured with cuts and/or segmentat
Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of laminated materials, for example laminated materials configured with cuts and/or segmentations. Segmentations may also assist with manufacturability, mechanical retention of components, and the like.
대표청구항
▼
1. An electrical machine, comprising: a rotor for rotation about a rotational axis;an electroconductive coil arranged circumferentially with respect to and fully encircling the rotational axis; anda stator assembly comprising: a first lamination stack comprising a first plurality of laminae includin
1. An electrical machine, comprising: a rotor for rotation about a rotational axis;an electroconductive coil arranged circumferentially with respect to and fully encircling the rotational axis; anda stator assembly comprising: a first lamination stack comprising a first plurality of laminae including outer laminae with one or more inner laminae therebetween, the first stack being arranged circumferentially with respect to the rotational axis on a first side of the coil for conducting magnetic flux;a second lamination stack comprising a second plurality of laminae including outer laminae with one or more inner laminae therebetween, the second stack being arranged circumferentially with respect to the rotational axis on a second side of the coil for conducting magnetic flux; anda back return material arranged circumferentially with respect to the rotational axis and extending between the first lamination stack and the second lamination stack to provide a magnetic flux path therebetween;wherein the first lamination stack and the second lamination stack are each configured with a gap extending radially through at least the inner laminae thereof to prevent a continuous electrical circuit around the rotational axis from being created in the inner laminae, andwherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine. 2. The electrical machine of claim 1, wherein the first lamination stack and the second lamination stack are separable by a plane perpendicular to the rotational axis of the electrical machine. 3. The electrical machine of claim 1, wherein the first stator portion comprises multiple lamination stacks electrically separated by gaps. 4. The electrical machine of claim 3, wherein the gaps are interlocking gaps. 5. The electrical machine of claim 3, wherein the gaps provide features for mechanical connection between at least two of the multiple lamination stacks. 6. The electrical machine of claim 1, wherein the first lamination stack comprises alternating layers of a first planar material and a second planar material. 7. The electrical machine of claim 1, wherein the first stator portion comprises multiple lamination stacks interlocked to form a generally ring-shaped structure. 8. The electrical machine of claim 1, wherein the is configured to reduce losses from flux linking within the first stator portion. 9. The electrical machine of claim 1, wherein the electrical machine is configured with a torque density in excess of 20 Newton-meters per kilogram of active magnetic and electrical materials in the electrical machine. 10. The electrical machine of claim 1, wherein the coil is configured with a resistance of less than 0.1 ohm. 11. The electrical machine of claim 1, wherein the electrical machine is configured for use in an e-bike. 12. The electrical machine of claim 1, wherein the back return material comprises multiple back return laminations, wherein the multiple back return laminations extend more than 330 degrees around the rotational axis of the electrical machine. 13. The electrical machine of claim 1, wherein the back return material is configured with at least two holes therethrough in order to reduce flux sharing in the electrical machine. 14. The electrical machine of claim 1, wherein the first lamination stack comprises an oriented material, and wherein magnetic flux in the first lamination stack generally flows within 30 degrees of the grain orientation. 15. The electrical machine of claim 1, wherein the back return material comprises alternating layers of a first planar material and a second planar material. 16. The electrical machine of claim 1, wherein the back return material comprises a back return lamination. 17. The electrical machine of claim 1, wherein the back return material comprises at least one powdered metal component. 18. The electrical machine of claim 1, wherein the back return material comprises iron. 19. The electrical machine of claim 1, wherein each gap extending radially through the first and second lamination stacks comprises an insulator for electrically isolating the circumferential segments of the lamination stacks. 20. The electrical machine of claim 1, wherein the electrical machine is a motor, and wherein a current applied to the coil induces magnetic flux in the first and second lamination stacks and the back return material to rotate the rotor. 21. The electrical machine of claim 1, wherein the electrical machine is a generator, and wherein rotation of the rotor generates magnetic flux in the first and second lamination stacks and back return material to induce current in the coil. 22. The electrical machine of claim 1, wherein an insulator is provided between the laminae of each of the first and second lamination stacks to electrically isolate the laminae from one another. 23. The electrical machine of claim 1, wherein the first lamination stack and the second lamination stack are each configured with a plurality of gaps extending radially through at least the inner laminae thereof for division into electrically isolated circumferential segments. 24. The electrical machine of claim 1, wherein the gap of each of the first and second lamination stacks extends radially through the outer laminae to prevent the continuous electrical circuit from being created in the outer laminae. 25. The electrical machine of claim 23, wherein the gaps of each first and second lamination stacks extend radially through the outer laminae for division into electrically isolated circumferential segments.
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