IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0095297
(2006-09-27)
|
등록번호 |
US-8310122
(2012-11-13)
|
우선권정보 |
IT-BZ2005A0063 (2005-11-29) |
국제출원번호 |
PCT/IB2006/002679
(2006-09-27)
|
§371/§102 date |
20081013
(20081013)
|
국제공개번호 |
WO2007/063369
(2007-06-07)
|
발명자
/ 주소 |
- Pabst, Otto
- Gadrino, Franco
|
출원인 / 주소 |
|
대리인 / 주소 |
Neal, Gerber & Eisenberg LLP
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
212 |
초록
▼
A rotating machine has a stator and a permanent magnet rotor that is more easily made, lower cost, and lighter by virtue of a plurality of permanent magnet assemblies mounted on a rotor body. Each magnet assembly includes two facing core plate stacks supporting a permanent magnet between them. Each
A rotating machine has a stator and a permanent magnet rotor that is more easily made, lower cost, and lighter by virtue of a plurality of permanent magnet assemblies mounted on a rotor body. Each magnet assembly includes two facing core plate stacks supporting a permanent magnet between them. Each core plate stack is made from a plurality of core plates of substantially identical size and shape and with on or more holes in substantially the same location to form respective bores in the stack. A tie rod is formed in each bore and retains the plates in a stack via bevels in the holes of the end plates. Preferably, the tie rods also apply compressive force as a result of placing the stacked plates in an injection mold, injecting plastic into the mold to fill each bore with plastic, and allowing the plastic to cure. As the plastic cures, it shrinks so that the tie rods pull the end plates together. To enhance the pressure, the stacked plates can be compressed before and during the injection process.
대표청구항
▼
1. A rotating machine comprising: a stator; anda rotor having: a rotor body, anda plurality of magnet holders mounted on the rotor body, the magnet holders configured to receive a plurality of magnet assemblies, each magnet assembly including two core plate stacks configured to support a permanent m
1. A rotating machine comprising: a stator; anda rotor having: a rotor body, anda plurality of magnet holders mounted on the rotor body, the magnet holders configured to receive a plurality of magnet assemblies, each magnet assembly including two core plate stacks configured to support a permanent magnet, each core plate stack including: two end plates of substantially identical size and shape, each end plate defining at least one beveled through hole, a smaller diameter of each beveled through hole defined by one of said end plates being closer to the other end plate when the end plates are aligned;a plurality of intermediate core plates of substantially identical size and shape to each other and to the two end plates, each intermediate core plate defining a through hole corresponding to and aligned with a respective one of the at least one beveled through holes to form a plurality of respective bores extending between the end plates and through all of the intermediate plates; anda separate in situ plastic tie rod extending through each formed bore, each in situ plastic tie rod being distinct from the two end plates, each in situ plastic tie rod engaging the bevels of the respective beveled through holes of the two end plates to retain the end plates and the intermediate core plates in a stacked relationship to form said core plate stack. 2. The rotating machine of claim 1, wherein each plastic tie rod applies compressive force via the bevels to compress the core plate stack together. 3. The rotating machine of claim 1, wherein the two end plates and the intermediate core plates each include a plurality of aligned features configured to interact with a plurality of other components of the rotor. 4. The rotating machine of claim 3, wherein the aligned features comprise at least one recess that forms a channel in the assembled core plate stack. 5. The rotating machine of claim 4, wherein the channel is configured to receive a holding tooth that engages a permanent magnet in one of the magnet assemblies. 6. The rotating machine of claim 3, wherein the features comprise at least one projection configured to engage a corresponding recess of one of the magnet holders of the rotor. 7. A method of using each of a plurality of magnet holders on a rotor body of a wind turbine including a stator, a rotor with the rotor body, and a plurality of magnet assemblies in the magnet holders, each magnet holder having: two opposed claws connected by a bridge; a first seat formed on one side of the bridge by the claws; a second seat formed on another side of the bridge by a plurality of terminal expansions of the claws; and a tightening section configured to apply expansive force to the terminal expansions when the tightening section is drawn away from the bridge, the expansive force causing the claws to pivot about the bridge and apply compressive force at opposite ends of the claws from their terminal expansion ends; said method of using each magnet holder comprising: stacking a plurality of intermediate plates with a plurality of end plates on either end of the stack, wherein each plate defines a beveled through hole, the plurality of beveled through holes defined by each of the plates are aligned to form a bore extending between the end plates and through the intermediate plates, and the plurality of end plates are each oriented with a smaller diameter of their beveled through holes closer to the plurality of intermediate stacks;injecting a plastic into the bore formed by the aligned beveled through holes; andallowing the plastic to cure to form at least one tie rod in situ which applies compressive force via the bevels to compress and hold the plates together, the in situ tie rod being distinct from the end plates. 8. The method of claim 7, further comprising trimming the plastic to be flush with a plurality of outer surfaces of the end plates. 9. The method of claim 7, further comprising placing the stack in an injection mold and injecting the plastic into the mold, thereby injecting the plastic into each bore. 10. The method of claim 7, further comprising compressing the stack and retaining the stack in a compressed state while injecting the plastic and while the plastic cures. 11. A wind machine permanent magnet rotor core plate stack comprising: a plurality of intermediate core plates of substantially identical size and shape stacked in alignment, the core plates each defining a plurality of mutually aligned through holes forming at least one bore through the stack,a first end plate on one end of the stack having substantially identical size and shape to the intermediate core plates and defining a beveled through hole with a smaller diameter equal to a diameter of a corresponding bore of the stack, the smaller diameter being adjacent a corresponding end of the stack,a second end plate on another end of the stack having substantially identical size and shape to the intermediate core plates and defining a beveled through hole with a smaller diameter equal to a diameter of a corresponding bore of the stack, the smaller diameter being adjacent a corresponding end of the stack, andan in situ formed tie rod formed in each bore to hold the plates together, the in situ formed tie rod being distinct from the two end plates and a first end of the in situ formed tie rod being flush with an outer surface of the first end plate and a second end of the in situ formed tie rod being flush with an outer surface of the second end plate. 12. The core plate stack of claim 11, wherein the tie rod applies compressive force on the end plates via the bevels of the end plate through holes. 13. The core plate stack of claim 11, wherein the tie rod is formed from a hardened fluid. 14. The core plate stack of claim 13, wherein the tie rod is made from a plastic. 15. The core plate stack of claim 14, wherein the tie rod is formed by placing the stack of intermediate core plates and end plates in an injection mold and injecting the plastic into the mold to fill each bore with the plastic, allowing the plastic to cure, and removing the stack from the mold. 16. A method of forming a core plate stack comprising: stacking a plurality of intermediate core plates of substantially identical size and shape with their edges aligned, each of said plurality of intermediate core plates defining at least one hole, wherein the at least one hole of each intermediate core plate is aligned to form a respective bore;placing two end plates of substantially identical size and shape with the intermediate core plates, each end plate defining a beveled hole corresponding to each of the at least one hole of the intermediate core plates, wherein each end plate is on a respective end of the stacked intermediate core plates;forming a tie rod in situ in each bore to hold the stacked plates together by applying compressive force via the bevels of the end plates to compress the stacked plates together, wherein the tie rod is distinct from the two end plates; andtrimming the tie rod such that a first end of the tie rod is flush with an outer surface of a first of the two end plates and a second end of the tie rod is flush with an outer surface of a second of the two end plates. 17. The method of claim 16, wherein forming a tie rod in each bore comprises placing the stacked plates in an injection mold, injecting a plastic into the mold, and allowing the plastic to cure. 18. The method of claim 16, further comprising applying pressure to the stacked plates while forming the tie rods. 19. A method of forming a wind turbine core plate stack, said method comprising: aligning at least two end plates and at least one intermediate plate between the end plates, the end plates and intermediate plate each defining at least one mutually aligned beveled hole forming at least one respective bore, andfor each formed bore, injecting a plastic into the formed bore to form a tie rod in situ to apply compressive force via the bevels to compress and hold the plates together, wherein the formed tie rod is distinct from the end plates and a first end of the tie rod is flush with an outer surface of a first of the end plates and a second end of the tie rod is flush with an outer surface of a second of the end plates. 20. The method of claim 19, further comprising stacking the plates before forming the tie rod. 21. The rotating machine of claim 1, wherein a first end of the in situ plastic tie rod is flush with an outer surface of a first of the two end plates and a second end of the in situ plastic tie rod is flush with an outer surface of a second of the two end plates.
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