JP3205032B2 - Superconducting magnetic bearing device - Google Patents
Superconducting magnetic bearing deviceInfo
- Publication number
- JP3205032B2 JP3205032B2 JP05047892A JP5047892A JP3205032B2 JP 3205032 B2 JP3205032 B2 JP 3205032B2 JP 05047892 A JP05047892 A JP 05047892A JP 5047892 A JP5047892 A JP 5047892A JP 3205032 B2 JP3205032 B2 JP 3205032B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic bearing
- bearing device
- superconducting
- support
- superconductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/0436—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part
- F16C32/0438—Passive magnetic bearings with a conductor on one part movable with respect to a magnetic field, e.g. a body of copper on one part and a permanent magnet on the other part with a superconducting body, e.g. a body made of high temperature superconducting material such as YBaCuO
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/55—Flywheel systems
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えばフライホイ−
ルを用いた電力貯蔵システムの超電導磁気軸受装置に関
するものである。BACKGROUND OF THE INVENTION The present invention relates to a flywheel, for example.
The present invention relates to a superconducting magnetic bearing device of a power storage system using a magnetic field.
【０００２】[0002]
【従来の技術】図３は、例えば第４５回１９９１年度春
季低温工学・超電導学会講演概要集(Ａ１−１８、ｐ１
８(１９９１))に示された従来の超電導磁気軸受装置を
示す構成図である。図において、３は超電導体、４はこ
の超電導体３を固定している銅製の超電導支持材、５は
この超電導体３に対向して配置されている永久磁石、６
はこの永久磁石５を固定している銅製の磁石支持材、７
はこの磁石支持材６に取り付けられた回転軸である。2. Description of the Related Art FIG. 3 is, for example, a summary of 45th 1991 Spring Low Temperature Engineering and Superconductivity Conference (A1-18, p1).
8 (1991)) is a configuration diagram showing a conventional superconducting magnetic bearing device. In the figure, 3 is a superconductor, 4 is a copper superconducting support member fixing the superconductor 3, 5 is a permanent magnet arranged opposite to the superconductor 3, 6
Is a copper magnet support for fixing the permanent magnet 5, 7
Is a rotating shaft attached to the magnet support 6.
【０００３】[0003]
【発明が解決しようとする課題】従来の超電導磁気軸受
装置は、上記のように通常、超電導支持材として非磁性
体の銅やステンレスが用いられているので、永久磁石の
磁界が不均一であったり回転軸が振動した場合、回転時
において超電導支持材に渦電流が生じ損失となる。ま
た、磁石支持材も銅でできているので超電導体間の空隙
が大きい場合や、超電導体内の超電導特性のばらつきか
ら超電導体が作る磁界は不均一になるので、回転時にお
いて磁石支持材にも渦電流が生じ損失となるという問題
があった。In the conventional superconducting magnetic bearing device, as described above, since the non-magnetic copper or stainless steel is usually used as the superconducting support material, the magnetic field of the permanent magnet is not uniform. If the rotating shaft vibrates, an eddy current is generated in the superconducting support member during rotation, resulting in loss. In addition, since the magnet support is also made of copper, the gap between the superconductors is large, and the superconducting magnetic field created by the superconductor becomes uneven due to variations in the superconducting characteristics within the superconductor. There is a problem that an eddy current is generated and a loss occurs.
【０００４】この発明は、上記のような問題点を解決す
るためになされたもので、超電導磁気軸受の支持材等の
構造材が電気絶縁材もしくは高抵抗材でできているの
で、回転体の振動や磁石の磁界不均一により生じる渦電
流がなくなり、回転損失が小さい超電導磁気軸受装置を
得ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and since a structural material such as a support material of a superconducting magnetic bearing is made of an electrically insulating material or a high-resistance material, the structure of the rotating body It is an object of the present invention to provide a superconducting magnetic bearing device that eliminates eddy currents caused by vibrations and non-uniform magnetic fields of magnets and has small rotation loss.
【０００５】[0005]
【課題を解決するための手段】この発明にかかる超電導
磁気軸受装置は、高温超電導体と永久磁石とが対向して
配置されている超電導磁気軸受装置において、前記高温
超電導体を冷却する低温冷媒を蓄える低温容器、前記高
温超電導体を固定している超電導支持材、および前記永
久磁石を支持している磁石支持材が電気絶縁体もしくは
高抵抗材料でできていることを特徴とする超電導磁気軸
受装置としている。A superconducting magnetic bearing device according to the present invention is a superconducting magnetic bearing device in which a high-temperature superconductor and a permanent magnet are arranged to face each other. A superconducting magnetic bearing device, wherein a low-temperature container for storing, a superconducting support for fixing the high-temperature superconductor, and a magnet support for supporting the permanent magnet are made of an electric insulator or a high-resistance material. And
【０００６】[0006]
【作用】この発明における超電導磁気軸受装置は、磁気
軸受の支持材等の構造材に電気絶縁材または高抵抗材を
用いているので、回転体の振動や永久磁石の磁界不均一
に基づく変動磁界で構造材に渦電流が生じない。The superconducting magnetic bearing device according to the present invention uses an electric insulating material or a high-resistance material as a structural material such as a support material for the magnetic bearing, so that the fluctuating magnetic field based on the vibration of the rotating body and the non-uniform magnetic field of the permanent magnet. Therefore, no eddy current is generated in the structural material.
【０００７】[0007]
【実施例】以下、この発明の実施例を図に基づいて説明
する。図１は、この発明の一実施例を示す断面図であ
る。図において、１３は高温超電導体、１４はこの高温
超電導体１３を固定している電気絶縁体の超電導支持
材、１５は低温容器１２内でこの高温超電導体１３に対
向して配置されている永久磁石、１６はこの永久磁石１
５を固定している電気絶縁体の磁石支持材、１７はこの
磁石支持材１６に取り付けられた回転軸である。これら
は、ガラスＦＲＰ等電気絶縁体または高抵抗材料ででき
た低温容器１２内の低温冷媒である液体窒素により、周
囲から冷却されている。回転軸上部の室温部に模擬フラ
イホイール１８と磁気クラッチ１９とを設け、この磁気
クラッチ１９を介して上部に備えられたモーター１１に
より回転力を与えるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of the present invention. In the figure, 13 is a high-temperature superconductor, 14 is a superconducting support member of an electrical insulator fixing the high-temperature superconductor 13, and 15 is a permanent member disposed in the low-temperature container 12 so as to face the high-temperature superconductor 13. The magnet 16 is the permanent magnet 1
Reference numeral 17 denotes an electrically insulating magnet supporting member to which 5 is fixed, and 17 denotes a rotating shaft attached to the magnet supporting member 16. These are cooled from the surroundings by liquid nitrogen as a low-temperature refrigerant in a low-temperature container 12 made of an electrical insulator such as glass FRP or a high-resistance material. A simulated flywheel 18 and a magnetic clutch 19 are provided at a room temperature portion above the rotating shaft, and a rotating force is applied by a motor 11 provided on the upper portion via the magnetic clutch 19.
【０００８】この発明の効果を確認するため、上記の超
電導磁気軸受装置においてＹ系高温超電導体側の支持材
１４を電気絶縁材であるガラスＦＲＰ（以下ＧＦＲＰと
略記）とし、対向する永久磁石側支持材１６は厚さ約１
ｍｍの従来のステンレスとして測定した回転損失を図２
に示す。図２において超電導支持材１４に電気絶縁材で
あるＧＦＲＰを用いた場合と電気良導体である従来の銅
支持材を用いた場合を示したが、この実験において本装
置に生じている振動により最大約±１００Ｇの変動磁界
が超電導体および超電導支持材に加わっている。損失測
定の結果、例えば回転数が２０００ｒｐｍにおいて銅支
持材を用いると損失は約０．８Ｗであり、ＧＦＲＰ支持
材の場合は約０．２Ｗと銅支持材に比べて約１／４も低
下し電気絶縁体を用いた効果は大きいことがわかる。な
お、ここでは永久磁石側の支持材をステンレスとした場
合の実験を示したが、これをＧＦＲＰとすれば、さらに
損失を小さくできることはいうまでもない。In order to confirm the effect of the present invention, in the above-described superconducting magnetic bearing device, the support member 14 on the Y-system high-temperature superconductor side is a glass FRP (hereinafter abbreviated as GFRP) which is an electrical insulating material, The material 16 has a thickness of about 1
Figure 2 shows the rotational loss measured as a
Shown in FIG. 2 shows a case where GFRP which is an electrical insulating material is used for the superconducting support material 14 and a case where a conventional copper support material which is a good electrical conductor is used. A fluctuating magnetic field of ± 100 G is applied to the superconductor and the superconducting support. As a result of the loss measurement, for example, the loss is about 0.8 W when the copper support is used at a rotation speed of 2000 rpm, and is about 0.2 W in the case of the GFRP support, which is about 1/4 lower than the copper support. It can be seen that the effect of using the electrical insulator is great. Here, an experiment was described in which the support material on the permanent magnet side was made of stainless steel, but it is needless to say that the loss can be further reduced by using GFRP.
【０００９】[0009]
【発明の効果】以上のように、この発明の超電導磁気軸
受装置によれば、磁気軸受の支持材等の構造材に電気絶
縁材または高抵抗材を用いているので、回転体の振動や
永久磁石の磁界不均一に基づく変動磁界で構造材に渦電
流が生じないので、低回転損失の磁気軸受を実現でき
る。As described above, according to the superconducting magnetic bearing device of the present invention, since the electric insulating material or the high-resistance material is used for the structural material such as the support for the magnetic bearing, the vibration of the rotating body and the permanent Since no eddy current is generated in the structural material due to the fluctuating magnetic field based on the non-uniformity of the magnetic field of the magnet, a magnetic bearing with low rotation loss can be realized.
【図１】この発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】この発明の一実施例における磁気軸受の回転損
失測定結果である。FIG. 2 shows a result of measuring a rotation loss of a magnetic bearing according to an embodiment of the present invention.
【図３】従来の超電導磁気軸受装置の構成図である。FIG. 3 is a configuration diagram of a conventional superconducting magnetic bearing device.
３，１３ 超電導体 ４，１４ 超電導支持材 ５，１５ 永久磁石 ６，１６ 永久磁石支持材 ７，１７ 回転軸 １１ モーター １８ 模擬フライホイール １９ 磁気クラッチ 3,13 Superconductor 4,14 Superconducting support 5,15 Permanent magnet 6,16 Permanent magnet support 7,17 Rotation axis 11 Motor 18 Simulated flywheel 19 Magnetic clutch
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 史朗 尼崎市塚口本町８丁目１番１号 三菱電 機株式会社 中央研究所内 (56)参考文献 特開 平５−82337（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 32/00 - 32/06 H02K 7/09 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shiro Nakamura 8-1-1, Tsukaguchi-Honmachi, Amagasaki City Mitsubishi Electric Corporation Central Research Laboratory (56) References JP-A-5-82337 (JP, A) (58) ) Surveyed field (Int.Cl. 7 , DB name) F16C 32/00-32/06 H02K 7/09
Claims (1)
置されている超電導磁気軸受装置において、 前記高温超電導体を冷却する低温冷媒を蓄える低温容
器、前記高温超電導体を固定している超電導支持材、お
よび前記永久磁石を支持している磁石支持材が電気絶縁
体もしくは高抵抗材料でできていることを特徴とする超
電導磁気軸受装置。1. A superconducting magnetic bearing device in which a high-temperature superconductor and a permanent magnet are arranged to face each other, a low-temperature container storing a low-temperature refrigerant for cooling the high-temperature superconductor, and a superconductor fixing the high-temperature superconductor. A superconducting magnetic bearing device, wherein a support member and a magnet support member supporting the permanent magnet are made of an electrical insulator or a high-resistance material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05047892A JP3205032B2 (en) | 1992-03-09 | 1992-03-09 | Superconducting magnetic bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05047892A JP3205032B2 (en) | 1992-03-09 | 1992-03-09 | Superconducting magnetic bearing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05248436A JPH05248436A (en) | 1993-09-24 |
| JP3205032B2 true JP3205032B2 (en) | 2001-09-04 |
Family
ID=12860014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05047892A Expired - Lifetime JP3205032B2 (en) | 1992-03-09 | 1992-03-09 | Superconducting magnetic bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3205032B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4756120B2 (en) * | 2001-03-16 | 2011-08-24 | 和之 出町 | Superconducting magnetic bearing |
| US7466051B2 (en) * | 2002-08-02 | 2008-12-16 | Kazuyuki Demachi | Superconducting magnetic bearing |
| JP5420293B2 (en) * | 2009-03-31 | 2014-02-19 | 公益財団法人鉄道総合技術研究所 | Superconducting flywheel power storage device |
-
1992
- 1992-03-09 JP JP05047892A patent/JP3205032B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05248436A (en) | 1993-09-24 |
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|---|---|---|---|
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