Turbocharger embedding an electrical machine with permanent magnets
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02B-033/44
F02B-037/10
F02B-039/10
F04D-013/06
H02K-021/44
H02K-011/00
H02K-005/173
H02K-007/08
H02K-007/14
출원번호
US-0925713
(2013-06-24)
등록번호
US-9140262
(2015-09-22)
우선권정보
EP-12305724 (2012-06-22)
발명자
/ 주소
Ramdane, Lateb
Vissers, Cornelius Petrus Antonius
출원인 / 주소
SKF MAGNETIC MECHATRONICS
대리인 / 주소
Peckjian, Bryan
인용정보
피인용 횟수 :
0인용 특허 :
8
초록▼
An electrical machine (20) coupled to a compressor (12) having a rotatable shaft (16), comprising: a rotor forming part of the rotatable shaft and having at least two magnetic portions (22A, 22B) separated by an inclined non-magnetic portion (24) and two elements (26A, 26B) of non-magnetic material
An electrical machine (20) coupled to a compressor (12) having a rotatable shaft (16), comprising: a rotor forming part of the rotatable shaft and having at least two magnetic portions (22A, 22B) separated by an inclined non-magnetic portion (24) and two elements (26A, 26B) of non-magnetic material at each end of the rotatable shaft, a stator comprising a laminated magnetic iron stack (28) surrounded by a winding (30) and disposed along a periphery of the rotor to define a first annular gap (32), a ring (34) of non-magnetic material disposed around the stator, and a casing (40) of magnetic material comprising permanent magnets (36), disposed around the non magnetic ring and having radial walls (40A, 40B) that project inwardly towards the rotor by defining a second annular gap (42) therebetween.
대표청구항▼
1. An electrical machine coupled to a compressor having a rotatable shaft, comprising: a rotor forming part of the rotatable shaft and having a longitudinal axis, said rotor comprising at least two magnetic portions separated by a non-magnetic portion which extends through the rotor at an angle incl
1. An electrical machine coupled to a compressor having a rotatable shaft, comprising: a rotor forming part of the rotatable shaft and having a longitudinal axis, said rotor comprising at least two magnetic portions separated by a non-magnetic portion which extends through the rotor at an angle inclined with respect to said longitudinal axis, thereby dividing said rotor,two elements of non-magnetic material at each end of the rotatable shaft,a stator including laminated magnetic iron stack surrounded by a winding and disposed along a periphery of the rotor to define a first annular gap,a ring of non-magnetic material disposed around the stator, anda casing of magnetic material comprising permanent magnets, disposed around the ring and having radial walls that project inwardly towards the rotor by defining a second annular gap therebetween. 2. The electrical machine according to claim 1, wherein the elements of non-magnetic material at each end of the rotatable shaft provide two discs of non-magnetic material. 3. The electrical machine according to claim 1, wherein the elements of non-magnetic material at each end of the rotatable shaft further comprise two bearing assemblies of non-magnetic material. 4. The electrical machine according to claim 3, wherein the magnetic and non-magnetic portions of the rotor have similar mechanical and thermal properties. 5. The electrical machine according to claim 4, wherein the stator winding further comprises a monophase or polyphase winding arrangement within a plurality of slots. 6. The electrical machine according to claim 5, wherein the permanent magnets are located at the end of the radial walls facing the at least two magnetic portions of the rotor. 7. The electrical machine according to claim 5, wherein the permanent magnets are located into the casing around the non magnetic ring. 8. A turbocharger (10) comprising: a compressor wheel,a turbine wheel,a rotatable shaft supported in a bearing assembly and coupled to the compressor wheel and the turbine wheel, the rotatable shaft forming a rotor of an electrical machine, the rotor having a longitudinal axis and comprising at least two magnetic portions separated by a non-magnetic portion which extends through the rotor at an angle inclined with respect to said longitudinal axis, thereby dividing said rotor,two elements of non-magnetic material at each end of the rotatable shaft,the electrical machine providing:a stator comprising a laminated magnetic iron stack surrounded by a winding and disposed along a periphery of the rotor to define a first annular gap,a ring of non-magnetic material disposed around the stator, anda casing of magnetic material comprising permanent magnets, disposed around the non-magnetic ring and having radial walls that project inwardly towards the rotor by defining a second annular gap therebetween. 9. The turbocharger according to claim 8, wherein the magnetic and non-magnetic portions of the rotor have similar mechanical and thermal properties. 10. The turbocharger according to claim 8, wherein the stator winding further comprises a monophase polyphase winding arrangement within a plurality of slots. 11. The turbocharger according to claim 8, wherein each end of the radial walls forms an internal support for the bearing assembly that supports the rotatable shaft via the non-magnetic elements having a cylindrical structure adapted to also support the compressor and turbine wheels. 12. The turbocharger according to claim 8, wherein the rotatable shaft including the at least two magnetic portions separated by an inclined non-magnetic portion has an elongate bore along a rotation axis of the rotatable shaft, wherein a non-magnetic core is inserted within the elongate bore, and whereinthe non-magnetic core is secured to the rotatable shaft at least at one end thereof with a nut and a washer of non-magnetic material. 13. The turbocharger according to claim 12, wherein the inclined non-magnetic portion further comprises a non-magnetic washer of oval shape.
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이 특허에 인용된 특허 (8)
Kawamura Hideo (Samukawa JPX), High speed motor/generator for turbocharger.
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