IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0129924
(2002-05-13)
|
우선권정보 |
NO-19995504 (1999-11-11) |
국제출원번호 |
PCT/NO00/00376
(2000-11-08)
|
국제공개번호 |
WO01/35702
(2001-05-17)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Sintef Energiforskning AS
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
6 |
초록
▼
Apparatus for induction heating of billet-shaped blanks (10) of electrically well conductive and non-magnetic metal, in particular aluminum or copper, comprising a winding (21) adapted to surround the blank completely or partially, to be supplied with electric alternating current (8) and to be coole
Apparatus for induction heating of billet-shaped blanks (10) of electrically well conductive and non-magnetic metal, in particular aluminum or copper, comprising a winding (21) adapted to surround the blank completely or partially, to be supplied with electric alternating current (8) and to be cooled (22) at least during the heating of the blank (10). The winding has turns comprising superconducting material and is enclosed by a thermally insulating chamber (33). The cooling (22) is adapted to maintain the winding at a temperature in the range 30-90° K, and the frequency of the alternating current (8) is adapted to be in the range of common mains frequencies.
대표청구항
▼
1. Apparatus for induction heating of billet-shaped blanks ( 10) of electrically well conductive and non-magnetic metal, in particular aluminium or copper, comprising a winding (1,21) adapted to surround the blank (10) completely or partially, to be supplied with electric alternating current (8) fro
1. Apparatus for induction heating of billet-shaped blanks ( 10) of electrically well conductive and non-magnetic metal, in particular aluminium or copper, comprising a winding (1,21) adapted to surround the blank (10) completely or partially, to be supplied with electric alternating current (8) from a power supply, and to be cooled by means of a cooling system (5,22) at least during the heating of the blank (10), characterized in that the winding (1,21) has turns comprising superconducting material (40) and is surrounded by a thermally insulating chamber (3,33), that the cooling system (5,22) is adapted to maintain the winding at a temperature in the range of 30-90° K, and that the frequency of the alternating current (8) is adapted to be in a range of common mains frequencies.2. Apparatus according to claim 1, characterized in that the cooling in the cooling system takes place with liquid nitrogen or helium gas being brought to circulate in cavities (5) or cooling channels adjacent to the winding (1) inside the thermally insulating chamber (3).3. Apparatus according to claim 1, characterized in that a jacket (22) of well heat conducting, but electrically insulating material, being in thermal contact with the winding (21) and being cooled by means of a cooling unit (23) which is a part of the cooling circuit of the cooling system.4. Apparatus according to claim 3, characterized in that the jacket (22) is located substantially radially inside the winding (21) and preferably constitutes a substantial supporting element for the winding (21).5. Apparatus according to claim 3, characterized in that the jacket (22) is thermally connected to at least one rod-like cooling head (26A,B) penetrating a wall of the thermally insulated chamber (33), preferably with a cooling head (26A,B) at either end of the winding (21), and that the cooling unit (23) has fluid communication (23A,23B) with each cooling head.6. Apparatus according to claim 1, characterized by means (11,12) adapted to at least partially extend the magnetic field resulting from the winding (21), more axially outwards at the ends of the winding (21).7. Apparatus according to claim 6, characterized in that said means comprise elements (11,12) of ferromagnetic material located at the ends of the winding (21).8. Apparatus according to claim 1, characterized in that the cooling system (5,22) is adapted to maintain the winding at a temperature in the range of 40-77° K.9. Apparatus according to claim 1, characterized in that the superconducting material (40) in the windings (21,45) is incorporated in a ribbon-shaped conductor element (43A) having a substantially larger width than thickness. (FIG.10).10. Apparatus according to claim 9, characterized in that a number of ribbon-shaped conductor elements (43A-E,63A-C) are assembled into a conductor group (45,65,75) being incorporated in the winding. (FIGS. 10,11,12).11. Apparatus according to claim 10, characterized in that one or more conductor groups (45,75) is/are wound into a plurality of flat, package-like parts (24,A,B,C,44A,B,C,74A,B) having a substantially larger diameter than axial dimension, and that the position in the conductor group is transposed (79) between axially adjacent package-like winding parts. (FIG.12).12. Apparatus according to claim 11, characterized in that between the package-like winding parts (44A,B,C) there are provided rod-shaped or disc-shaped separating elements (48A,B,C) of thermally well conducting, but electrically insulating material. (FIG.7).13. Apparatus according to claim 10, characterized in that each ribbon-shaped conductor element (43B) is electrically insulated (49) in relation to the adjacent conductor elements (43A,43C), and that each conductor group (45,65,75) is electrically insulated (50). (FIG.10).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.