Fluid-submerged electric motor
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0804305
(2004-03-19)
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등록번호 |
US-7352090
(2008-04-01)
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발명자
/ 주소 |
- Gustafson,James R.
- Parsons,Douglas
- Marks,Kenneth
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
10 인용 특허 :
6 |
초록
▼
An electric motor has at least one component that is submerged in a cooling fluid held in a fluid-filled cavity. The stator, rotor, and rotor shaft bearings are all possible components that may be submerged. The cooling fluid floods the stator, rotor, and/or bearings to cool the components. The flui
An electric motor has at least one component that is submerged in a cooling fluid held in a fluid-filled cavity. The stator, rotor, and rotor shaft bearings are all possible components that may be submerged. The cooling fluid floods the stator, rotor, and/or bearings to cool the components. The fluid may have a high electrical resistance to isolate the motor components from any contact with flammable gasses as well as prevent arcs or sparks. The cavity holding the fluid also ensures continuous lubrication by preventing fluid from leaking or evaporating out of the motor.
대표청구항
▼
What is claimed is: 1. An electric motor assembly, comprising: a fluid circulation circuit; a housing having a cavity that is fluidly connected to said fluid circulation circuit; an electric motor having at least one electric motor component disposed in the cavity; and a thermally conductive dielec
What is claimed is: 1. An electric motor assembly, comprising: a fluid circulation circuit; a housing having a cavity that is fluidly connected to said fluid circulation circuit; an electric motor having at least one electric motor component disposed in the cavity; and a thermally conductive dielectric fluid for circulation through the cavity to substantially submerge said at least one electric motor component. 2. The assembly of claim 1, wherein the housing further comprises a cylindrical partition and the electric motor comprises a rotor, a stator iron, and a stator winding, the partition separating the rotor from the stator iron and the stator winding, wherein a space between an exterior portion of the partition and the housing forms a cavity, and wherein the thermally conductive dielectric fluid fills the cavity to substantially submerge at least one of the stator iron and the stator winding without contacting the rotor. 3. The assembly of claim 1, wherein the dielectric fluid is a dielectric oil. 4. The assembly of claim 1, wherein the housing has a fluid inlet and a fluid outlet, and wherein the system further comprises: a fluid pump that circulates the dielectric fluid through the fluid inlet into the cavity and out of the fluid outlet; and a fluid reservoir that houses excess dielectric fluid. 5. The assembly of claim 1, further comprising a heat exchanger in fluid communication with the dielectric fluid. 6. The assembly of claim 1, wherein said at least one electric motor component includes one of a rotor and a rotor bearing substantially submerged in said thermally conductive fluid. 7. The assembly as recited in claim 1, wherein said dielectric fluid is in fluid communication with a bearing which supports a rotor shaft. 8. The assembly of claim 1, wherein said at least one electric motor component comprises a rotor rotatable about a rotor axis, said rotor rotatable while substantially submerged in said dielectric fluid to circulate said dielectric fluid through said cavity. 9. The assembly of claim 1, wherein said fluid circulation circuit includes a portion that is outside of said housing. 10. The assembly of claim 1, wherein said electric motor includes a rotor output shaft that is coupled to a gas turbine engine, said engine in fluid communication with said fluid circulation circuit. 11. The assembly of claim 10, wherein said dielectric fluid comprises engine oil received from said engine through said fluid circulation circuit. 12. The assembly of claim 4, wherein said fluid inlet is an exclusive fluid input into said housing. 13. The assembly of claim 4, wherein said fluid outlet is an exclusive fluid outlet from said housing. 14. The assembly of claim 4, wherein said fluid outlet is an exclusive fluid outlet from said housing and said fluid inlet is an exclusive fluid input into said housing. 15. The assembly of claim 4, wherein said fluid pump is located between said fluid reservoir and said filter. 16. The assembly of claim 2, wherein said partition is a cylinder. 17. The assembly of claim 16, further comprising at least one seal member located radially inward of said partition and radially outward of said housing. 18. The assembly of claim 16, further comprising a first seal member located near a first end of said partition and a second seal member near a second, opposite end of said partition.
이 특허에 인용된 특허 (6)
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Koziara Robert P. (Lake Elmo MN) Shanks Eugene G. (Blaine MN) Norrick Daniel A. (Anoka MN), Auxiliary power unit for hybrid electric vehicle.
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McCabria, Jack L., Generator auxiliary mode lubrication system and method.
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Gravatt Eugene M. ; Caudill Dirk A., Heat exchanging pump motor for usage within a recirculating water system.
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Mohn, Frank, Pump system.
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Iwata Minoru (Kanagawa JPX) Sano Kiyohiko (Kanagawa JPX), Submersible motor using a water-tight wire as the primary winding.
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Erickson John W. (Huntington Beach CA) Fegan Samuel D. (King of Prussia PA), Thermal expansion absorber.
이 특허를 인용한 특허 (10)
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Tecza, Joseph A.; Kidd, H. Allan, Circulating dielectric oil cooling system for canned bearings and canned electronics.
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Smith, H. Kevin, Cooling system for a vehicle drive assembly.
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Northwall, Joel W.; Theis, Kenneth R.; Druhe, Timothy J.; Lyle, David M., Ground ring and enclosure in an electric motor.
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Griffin, Timothy R.; Gilarranz, Jose L., Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems.
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Gilarranz, Jose L.; Griffin, Timothy R., Method for on-line detection of resistance-to-ground faults in active magnetic bearing systems.
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Legros, Craig R.; Finke, Aaron M., Seal arrangement for turbomachine.
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Maier, Martin D.; Kidd, H. Allan, Segmented coast-down bearing for magnetic bearing systems.
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Garriga, Rudolph; Kubic, Mike, Systems and methods for fluid cooling of electric machines.
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Rodriguez, Rigoberto; Gagne, Steven; Burns, Donald W., Thermal system having electrical device.
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Maier, Martin D.; Kidd, H. Allan, Whirl inhibiting coast-down bearing for magnetic bearing systems.
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