Electric machine with combined air and water cooling
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02K-009/14
H02K-009/197
H02K-001/20
H02K-009/08
H02K-009/10
H02K-009/19
출원번호
US-0649386
(2013-11-27)
등록번호
US-10158272
(2018-12-18)
우선권정보
EP-12195465 (2012-12-04)
국제출원번호
PCT/EP2013/074812
(2013-11-27)
국제공개번호
WO2014/086627
(2014-06-12)
발명자
/ 주소
Noack, Felix
Sindelka, Martin
Weiss, Sebastian
출원인 / 주소
Siemens Aktiengesellschaft
대리인 / 주소
Henry M. Feiereisen LLC
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
An electric machine includes a housing having an air inlet opening near a front or rear end of the housing for aspirating air, and an air outlet opening for expelling air. The housing accommodates a stator, and a rotor is mounted in the housing for rotation about an axis of rotation. Mounted on a si
An electric machine includes a housing having an air inlet opening near a front or rear end of the housing for aspirating air, and an air outlet opening for expelling air. The housing accommodates a stator, and a rotor is mounted in the housing for rotation about an axis of rotation. Mounted on a side of the housing in parallel relation to the axis of rotation is a hood-like attachment to cover the air inlet and outlet openings so that air expelled from the housing through the air outlet opening is fed back to the air inlet opening. Disposed in the stator are pipes for flow of a liquid cooling medium to directly cool the stator during operation. At least some of the pipes project beyond the stator toward the front and rear ends, so that during operation heat is removed by the pipes from air flowing in the housing.
대표청구항▼
1. An electric machine, comprising: a housing having a front end and a rear end, said housing having at least one air inlet opening near one of the front and rear ends of the housing for aspirating air, and an air outlet opening for expelling air;a stator disposed in the housing;a rotor mounted in t
1. An electric machine, comprising: a housing having a front end and a rear end, said housing having at least one air inlet opening near one of the front and rear ends of the housing for aspirating air, and an air outlet opening for expelling air;a stator disposed in the housing;a rotor mounted in the housing for rotation about an axis of rotation;an attachment mounted on a side of the housing in parallel relation to the axis of rotation and configured to cover the air inlet and outlet openings in the manner of a hood so that air expelled from the housing through the air outlet opening is fed back to the air inlet opening;straight pipes disposed in the stator for flow of a liquid cooling medium to directly cool the stator during operation, at least some of the pipes configured to project beyond the stator toward the front and rear ends, as viewed in a direction of the axis of rotation, so that during operation heat is removed by the pipes from air flowing in the housing; anda stator winding system disposed in the stator, said stator winding system having a front winding head toward the front end and a rear winding head toward the rear end, as viewed from the stator in the direction of the axis of rotation, said pipes covering at least 50% of the front and the rear winding heads, as viewed in the direction of the axis of rotation, wherein a percentage of coverage by the pipes is determined by a ratio of an axial length of an overlap of the pipes beyond the stator, relative to an overlap of the front and the rear winding heads beyond the stator,wherein the pipes include a first plurality of the pipes extending exclusively in a direction of the axis of rotation in an area facing away from the attachment and a second plurality of the pipes extending exclusively in a direction of the axis of rotation an area facing the attachment, said pipes of the first plurality of the pipes extending in the direction of the axis of rotation in the area facing away from the attachment projecting less far beyond the stator toward the front and rear ends than the pipes of the second plurality of the pipes extending in the direction of the axis of rotation in the area radially facing the attachment. 2. The electric machine of claim 1, wherein the air inlet opening is provided near the front end, and the air outlet opening is provided near the rear end. 3. The electric machine of claim 1, wherein the housing has two of said air inlet openings, one air inlet opening provided near the front end and one air inlet opening provided near the rear end, said air outlet opening being provided on a side between the front and rear ends. 4. The electric machine of claim 1, wherein the pipes cover at least 75% of the front and rear winding heads. 5. The electric machine of claim 1, wherein the pipes are evenly spaced apart about the axis of rotation and project equidistantly beyond the stator toward the front and rear ends. 6. The electric machine of claim 1, wherein the aspirated air flowing inside the housing flows around the pipes in areas in which the pipes project beyond the stator toward the front and rear ends. 7. The electric machine of claim 1, further comprising cooling fins protruding from the pipes and disposed on the pipes in areas in which the pipes project beyond the stator toward the front and rear ends. 8. The electric machine of claim 1, further comprising cooling elements extending in the direction of the axis of rotation beyond the pipes toward the front and rear ends of the housing and disposed on the pipes. 9. The electric machine of claim 1, further comprising ring manifolds configured to respectively interconnect the pipes at their axial extremities. 10. The electric machine of claim 9, further comprising cooling elements disposed on the ring manifolds and extending in the direction of the axis of rotation beyond the ring manifolds toward the front and rear ends of the housing. 11. The electric machine of claim 1, wherein the rotor has at least one longitudinal cooling air duct, which extends in the direction of the axis of rotation, and rotor-side transverse cooling air ducts, which extend from the at least one longitudinal cooling air duct radially with respect of the axis of rotation and branch off radially outward at predetermined axial positions, wherein the stator has a stator section between the predetermined axial positions and stator-side transverse cooling air ducts extending radially with respect to the axis of rotation at the predetermined axial positions, and wherein air aspirated at the air inlet opening during operation flows inside the housing at feast partially in the direction of the axis of rotation into the at least one longitudinal cooling air duct and then flows radially outward through the rotor-side transverse cooling air ducts and the stator-side transverse cooling air ducts.
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이 특허에 인용된 특허 (2)
Zimmermann Hans (Monchaltorf CHX), Air-cooled rotating electrical machine.
Beatty, Reinhard; Trago, Bradley A.; Brown, Gerald W.; Hovey, Ian; Bishop, Ron, Cooling of electric motor with coolant pipe and conduction plates or cups.
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