JP2529382B2 - Insertion molding method of superconducting field coil in rotor of superconducting rotating electric machine - Google Patents
Insertion molding method of superconducting field coil in rotor of superconducting rotating electric machineInfo
- Publication number
- JP2529382B2 JP2529382B2 JP1073902A JP7390289A JP2529382B2 JP 2529382 B2 JP2529382 B2 JP 2529382B2 JP 1073902 A JP1073902 A JP 1073902A JP 7390289 A JP7390289 A JP 7390289A JP 2529382 B2 JP2529382 B2 JP 2529382B2
- Authority
- JP
- Japan
- Prior art keywords
- field coil
- superconducting
- superconducting field
- coil
- rotor
- 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 - Fee Related
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、超電導回転電機の回転子における超電導
界磁コイルの挿入成形方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for inserting and molding a superconducting field coil in a rotor of a superconducting rotating electric machine.
［従来の技術］ 第２図は、例えば、特開昭和57−208859号公報に示さ
れている従来の超電導回転電機の回転子の断面図であ
る。[Prior Art] FIG. 2 is a cross-sectional view of a rotor of a conventional superconducting rotary electric machine disclosed in, for example, Japanese Patent Laid-Open No. 57-208859.
図において、符号（１）はトルクチューブ、（２）は
トルクチューブ（１）の中央部に形成するコイル取付
軸、（３）はコイル取付軸（２）に固定されている超電
界磁コイル、（４）はトルクチューブ（１）とコイル取
付軸（２）を囲繞する常温ダンパ、（５）はこの常温ダ
ンパ（４）とコイル取付軸（２）との間に配設されてい
る低温ダンパ、（６）および（７）はコイル取付軸
（２）の夫々外周部及び側面部に取り付けられているヘ
リウム外筒及びヘリウム端板、（８）及び（９）はそれ
ぞれ駆動側及び反駆動側の端部軸、（10）はこれらの端
部軸（８）（９）を軸支する軸受、（11）は界磁電流供
給用のスリップリング、（12）はトルクチューブ（１）
に形成あるいは配置されている熱交換器、（13）は側部
輻射シールド、（14）は真空部、（15）は液体ヘリウム
の液溜め部、（16）はコイル取付軸（２）の両端に設け
られた保持環である。In the figure, reference numeral (1) is a torque tube, (2) is a coil mounting shaft formed in the central portion of the torque tube (1), (3) is a super-electric field coil fixed to the coil mounting shaft (2), (4) is a room temperature damper surrounding the torque tube (1) and the coil mounting shaft (2), and (5) is a low temperature damper arranged between the room temperature damper (4) and the coil mounting shaft (2). , (6) and (7) are helium outer cylinders and helium end plates attached to the outer peripheral portion and the side surface portion of the coil attachment shaft (2), respectively, and (8) and (9) are the driving side and the non-driving side, respectively. End shafts, (10) bearings that support these end shafts (8) and (9), (11) slip fields for supplying field current, (12) torque tube (1)
A heat exchanger formed or arranged on the side, (13) a side radiation shield, (14) a vacuum section, (15) a liquid helium reservoir, (16) both ends of the coil mounting shaft (2) Is a retaining ring provided in the.
上記構成からなる超電導回転電機の回転子において
は、コイル取付軸（２）に配設されている超電導界磁コ
イル（３）を極低温に冷却することにより、電気抵抗を
零の状態とし、励磁損失をなくすことにより、この超電
導界磁コイル（３）に強力な磁界を発生させ、固定子
（図示せず）に交流電力を発生させる。この超電導界磁
コイル（３）を極低温に冷却、保持するために液体ヘリ
ウムをい反駆動側端部軸（９）の中央部から導入管（図
示せず）を通じ、ヘリウム外筒（６）、ヘリウム端板
（７）により形成される液体ヘリウム容器部に供給する
一方、回転子内部を真空部（14）により高真空に保つと
共に、極低温の超電動界磁コイル（３）及びコイル取付
軸（２）に回転トルクを伝えるトルクチューブ（１）を
薄肉円筒とすると共に熱交換器（12）を設け、このトル
クチューブ（１）を通じて極低温部に侵入する熱を極力
減らす構造が最も一般的である。さらに、側面からの輻
射により侵入する熱を低減するために、側部輻射シール
ド（13）が設けられている。In the rotor of the superconducting rotary electric machine having the above configuration, the superconducting field coil (3) disposed on the coil mounting shaft (2) is cooled to an extremely low temperature, so that the electric resistance is reduced to zero and the excitation is performed. By eliminating the loss, a strong magnetic field is generated in the superconducting field coil (3), and AC power is generated in a stator (not shown). In order to cool and hold the superconducting field coil (3) at an extremely low temperature, liquid helium is introduced, and the helium outer cylinder (6) is passed through the introduction pipe (not shown) from the center of the end shaft (9) on the non-drive side. , While supplying to the liquid helium container formed by the helium end plate (7), while maintaining a high vacuum inside the rotor by the vacuum part (14), the cryogenic super-electric field coil (3) and coil mounting The most common structure is that the torque tube (1) that transmits the rotational torque to the shaft (2) is a thin-walled cylinder and a heat exchanger (12) is provided to reduce the heat entering the cryogenic part through this torque tube (1) as much as possible. Target. Further, a side radiation shield (13) is provided in order to reduce heat entering by radiation from the side surface.
一方、常温ダンパ（４）及び低温ダンパ（５）は、固
定子からの高調波磁界をシールドし、超電導界磁コイル
（３）を保護すると共に、電力系統のじょう乱による回
転子振動を減衰させる機能を有する一方、常温ダンパ
（４）は真空外筒としての機能、低温ダンパ（５）はヘ
リウム容器部への輻射シールドとしての機能を兼ねる方
式が一般的である。On the other hand, the room temperature damper (4) and the low temperature damper (5) shield the harmonic magnetic field from the stator, protect the superconducting field coil (3), and attenuate the rotor vibration due to the disturbance of the power system. In general, the normal temperature damper (4) has a function as a vacuum outer cylinder, and the low temperature damper (5) also has a function as a radiation shield for a helium container while having a function.
なお第２図においては、回転子内部のヘリウム導入、
排出系を構成する配管類及び回転子に接続されているヘ
リウム導入、排出装置は省略した。In FIG. 2, helium introduced inside the rotor,
The helium introduction and discharge device connected to the pipes and rotor that form the discharge system was omitted.
ここで、上記超電導界磁コイルに、例えばNbTiのよう
な可撓性を有する線材を用いる場合には、コイル取付軸
（２）の表面に軸方向の溝を設け、その溝に超電導界磁
コイル（３）を巻回するのが望ましい。Here, when a flexible wire such as NbTi is used for the superconducting field coil, an axial groove is provided on the surface of the coil mounting shaft (2), and the superconducting field coil is formed in the groove. It is desirable to wind (3).
次に、コイル取付軸（２）の表面に形成の溝に超電導
界磁コイル（３）が巻回された構造について、更に詳細
に説明する。Next, the structure in which the superconducting field coil (3) is wound around the groove formed on the surface of the coil mounting shaft (2) will be described in more detail.
第３図は第２図のに示すIII−III線による断面図の一
部であって、（２）はコイル取付軸、（17）はコイル取
付軸（２）の表面に軸方向に設けられた溝、（３）は溝
（17）内に収められた超電導界磁コイル、（18）は溝内
絶縁、（19）は超電導界磁コイル（３）を溝（17）内に
保持するくさび、（20）はくさびの絶縁である。FIG. 3 is a part of a cross-sectional view taken along the line III-III shown in FIG. 2, in which (2) is a coil mounting shaft, and (17) is provided on the surface of the coil mounting shaft (2) in the axial direction. Groove, (3) a superconducting field coil housed in the groove (17), (18) insulation in the groove, and (19) a wedge for holding the superconducting field coil (3) in the groove (17). , (20) is wedge insulation.
第３図において、超電導界磁コイル（３）は、図中Ａ
−Ａ線を取り巻くように巻回されており、従って、Ａ−
Ａ線を極中心として強力な磁界を発生する。In FIG. 3, the superconducting field coil (3) is indicated by A in the figure.
-It is wound so as to surround the A wire, and therefore A-
A strong magnetic field is generated with the line A as the pole center.
ところで、超電導界磁コイル（３）には回転による遠
心力の外に強力な電磁力が働く。By the way, a strong electromagnetic force acts on the superconducting field coil (3) in addition to centrifugal force due to rotation.
もし、超電導界磁コイル（３）が堅固に固定されてな
く電磁力により移動するようなことがあると、その移動
による摩擦熱によって、超電導界磁コイル（３）の温度
が高くなり、その結果、超電導界磁コイル（３）は超電
導破壊を起こす危険性が高くなる。超電導破壊を起こす
と、回転電機の運転を停止することになる、超電導界磁
コイル（３）の固定は極めて大きな問題である。If the superconducting field coil (3) is not firmly fixed and moves due to electromagnetic force, the frictional heat due to the movement raises the temperature of the superconducting field coil (3), and as a result, The superconducting field coil (3) has a high risk of causing superconducting breakdown. Fixing the superconducting field coil (3), which causes the operation of the rotating electric machine to stop when the superconducting breakdown occurs, is an extremely serious problem.
しかしながら、超電導界磁コイル（３）は、一般に細
くターン数が多いために、溝（17）内への固定は極めて
難しい。However, since the superconducting field coil (3) is generally thin and has a large number of turns, it is extremely difficult to fix it in the groove (17).
また、円周方向、半径方向共、プレス機等の利用がで
きず、超電導界磁コイル（３）の固定は大きな課題であ
る。In addition, a press machine or the like cannot be used in both the circumferential direction and the radial direction, and fixing the superconducting field coil (3) is a major problem.
そこで、従来の超電導界磁コイル（３）の締付固定手
段としては、特開昭和57−208859号公報に示された第４
図のようなものがある。Therefore, as a conventional fastening and fixing means for the superconducting field coil (3), there is a fourth one disclosed in Japanese Patent Laid-Open No. 57-208859.
There is something like the figure.
図において、符号（2a）はコイル取付軸（２）の隣接
する溝（17）と溝（17）との間の歯部、（2b）はこの歯
部（2a）の外周面に設けられた複数個のメジネであり、
（21）は隣接するメジネ（2b）にそれぞれ螺合して取り
付けられるボルト（24）により、厚座金（22）を介して
両ボルト（24）にまたがって取り付けられる締付けリン
グ、（22）は厚座金、（23）は超電導界磁コイル（３）
を押すために押え金、（24）はメジネ（2b）に締付けリ
ング（21）を取り付けるためのボルト、（25）は締付け
リング（21）に貫通して螺合し、その先端において超電
導界磁コイル（３）を押圧するジャッキボルトである。In the figure, reference numeral (2a) is a tooth portion between the groove (17) and the groove (17) adjacent to each other on the coil mounting shaft (2), and (2b) is provided on the outer peripheral surface of the tooth portion (2a). There are multiple mezzines,
(21) is a tightening ring that is attached to both bolts (24) through thick washers (22) by bolts (24) that are screwed and attached to the adjacent media (2b), and (22) is thick. A washer, (23) is a superconducting field coil (3)
Presser foot for pushing, bolt (24) for attaching the tightening ring (21) to the media (2b), (25) is screwed through the tightening ring (21), and the superconducting field A jack bolt for pressing the coil (3).
また、コイル取付軸（２）の歯部（2a）の外周面に設
けられた複数個のメジネ（2b）には、厚座金（22）とボ
ルト（24）により締付けリング（21）が取り付けられジ
ャッキボルト（25）は締付けリング（21）にねじ込まれ
ているので、ジャッキボルト（25）によって押え金（2
3）を介して超電導界磁コイル（３）を押して成形する
ことができ、超電導界磁コイル（３）の堅固な固定が可
能となる。A tightening ring (21) is attached to the plurality of medians (2b) provided on the outer peripheral surface of the tooth portion (2a) of the coil mounting shaft (2) with a thick washer (22) and a bolt (24). Since the jack bolt (25) is screwed into the tightening ring (21), use the jack bolt (25) to presser foot (2
The superconducting field coil (3) can be pressed and shaped through 3), and the superconducting field coil (3) can be firmly fixed.
［発明が解決しょうとする課題］ 従来の超電導回転電機の回転子における超電導界磁コ
イルの取付固定は、以上のように構成されているので、
超電導界磁コイルの加熱乾燥作業によって、溝内絶縁が
枯れた場合には、ジャッキボルトに締付力が低下する恐
れがあり、そのために、ジャッキボルトを増締めするこ
とが必要となり、また、ジャッキボルトによる締付力を
一定に保つことが非常に困難となるために、超電導界磁
コイルの固定が均一にできないなどの多くの問題点を有
しており、かねてより、このような問題点を解決すべく
課題を有していた。[Problems to be Solved by the Invention] Since the mounting and fixing of the superconducting field coil in the rotor of the conventional superconducting rotating electric machine is configured as described above,
If insulation in the groove is exhausted by heating and drying the superconducting field coil, the tightening force of the jack bolt may decrease.Therefore, it is necessary to tighten the jack bolt again. Since it is very difficult to keep the tightening force by the bolts constant, there are many problems such as the inability to fix the superconducting field coil uniformly. There was a problem to be solved.
この発明は、上記のような課題を解決するためになさ
れたもので、ジャッキボルトの増締め作業を必要とせ
ず、締付力も一定に保つことが可能で、超電導界磁コイ
ルの固定が均一に行ない得る超電導回転電機の回転子に
おける超電導界磁コイルの挿入成形方法を得ることを目
的とする。The present invention has been made to solve the above problems, does not require additional tightening work of jack bolts, can also keep the tightening force constant, and evenly fixes the superconducting field coil. An object of the present invention is to obtain a method of inserting and forming a superconducting field coil in a rotor of a superconducting rotating electric machine that can be performed.
［課題を解決するための手段］ この発明に係る超電導回転電機の回転子における超電
導界磁コイルの挿入成形方法は、コイル取付軸の溝内に
超電導界磁コイルを挿入する工程と、コイル取付軸の外
周面を囲むように締付けリングをコイル取付軸に固定す
る工程と、超電導界磁コイルに対向して締付けリングに
ねじ係合しているジャッキボルトを締め付け、ジャッキ
ボルトと超電導界磁コイルとの間に配置された弾性体を
介して超電導界磁コイルを溝内に押圧して成形する工程
とを含むものである。[Means for Solving the Problem] A method of inserting and forming a superconducting field coil in a rotor of a superconducting rotating electric machine according to the present invention includes a step of inserting a superconducting field coil into a groove of a coil mounting shaft, and a coil mounting shaft. The step of fixing the tightening ring to the coil mounting shaft so as to surround the outer peripheral surface of the, and tightening the jack bolt that is screw-engaged with the tightening ring facing the superconducting field coil. And a step of pressing the superconducting field coil into the groove via an elastic body arranged in between to form the superconducting field coil.
［作用］ この発明においては、超電導界磁コイル上面とジャッ
キボルト先端加圧部との間に弾性体を介装させているの
で、弾性体は超電導界磁コイルの微小な寸法変化にも十
分追従して伸縮し、従って、超電導界磁コイルのコイル
取付軸の溝への固定力も一定に保つように機能する。[Operation] In the present invention, since the elastic body is interposed between the upper surface of the superconducting field coil and the pressing portion of the jack bolt tip, the elastic body sufficiently follows the minute dimensional change of the superconducting field coil. Then, the superconducting field coil functions to keep the fixing force in the groove of the coil mounting shaft of the superconducting field coil constant.
［実施例］ 以下、この発明をその一実施例を示す図に基づいて説
明する。[Embodiment] The present invention will be described below with reference to the drawings showing an embodiment thereof.
なお、符号（２）（３）（17）（18）（20）〜（22）
（24）（25）で示すものは、従来装置において同一符号
で示したものと同一又は同等のものである。In addition, reference numerals (2), (3), (17), (18), (20) to (22)
(24) (25) are the same as or equivalent to those shown by the same reference numerals in the conventional device.
第１図において、符号（31）は超電導界磁コイル
（３）とジャッキボルト（25）との間に介装して、超電
導界磁コイル（３）の微小な寸法変化を吸収させるため
の弾性体、例えば、皿ばねである。また、（32a）及び
（32b）は上記皿ばね（31）の上面及び下面を受けて、
ジャッキボルト（25）との間、及び、超電導界磁コイル
（３）との間にそれぞれ介装される外側及び内側の押え
金である。In FIG. 1, reference numeral (31) is an elastic member interposed between the superconducting field coil (3) and the jack bolt (25) to absorb a minute dimensional change of the superconducting field coil (3). The body, for example a disc spring. Further, (32a) and (32b) receive the upper surface and the lower surface of the disc spring (31),
Outer and inner presser feet are respectively interposed between the jack bolt (25) and the superconducting field coil (3).
この実施例は、上記のように構成されるが、次にその
作用について説明する。This embodiment is configured as described above, and its operation will be described next.
コイル取付軸（２）の歯部（2a）の外周面に設けられ
ている複数個のメジネ（2b）には、厚座金（22）を介し
て、ボルト（24）により締付けリング（21）が取り付け
られており、ジャッキボルト（25）は、この締付けリン
グ（21）にねじ係合して貫通し、その先端加圧部が外側
押え金（32a）、皿ばね（31）、内側押え金（32b）を介
して超電導界磁コイル（３）を押圧しているので、ジャ
ッキボルト（25）を回すことによって、外側押え金（32
a）、皿ばね（31）及び内側押え金（32b）を介して超電
導界磁コイル（３）を押圧して成形する。従って、超電
導界磁コイル（３）の堅固で均一な固定をすることが可
能となる。The tightening ring (21) is attached to the plurality of medians (2b) provided on the outer peripheral surface of the tooth portion (2a) of the coil mounting shaft (2) by the bolt (24) through the thick washer (22). The jack bolt (25) is attached and penetrates through the tightening ring (21) by threading, and the tip end pressurizing portion has an outer presser foot (32a), a disc spring (31), and an inner presser foot (25). Since the superconducting field coil (3) is being pressed via the (32b), by turning the jack bolt (25), the outer presser foot (32
a), the superconducting field coil (3) is pressed through the disc spring (31) and the inner presser foot (32b) to be molded. Therefore, the superconducting field coil (3) can be firmly and uniformly fixed.
なお、上記実施例では、弾性体として皿ばねを用いた
ものを示したが、これに限らず、つる巻きばねや板ばね
等あるいはその他の弾性体を用いてもよい。In the above embodiment, the disc spring is used as the elastic body. However, the elastic body is not limited to this, and a spiral spring, a leaf spring, or another elastic body may be used.
［発明の効果］ 以上説明したように、この発明によれば、超電導界磁
コイル上面とジャッキボルト先端加圧部との間に弾性体
を設けているので、超電導界磁コイルの微小な寸法変化
に対しても弾性体が対応し、従って、ジャッキボルトの
増締め不要となり、また、弾性体を介しているので、締
付力を一定に保つこともでき、その結果、超電導界磁コ
イルの固定も均一にすることが可能となり、信頼性の高
い超電導界磁コイルを有する超電導回転電機の回転子が
得られる効果を有している。[Effects of the Invention] As described above, according to the present invention, since the elastic body is provided between the upper surface of the superconducting field coil and the jack bolt tip pressing portion, a minute dimensional change of the superconducting field coil is achieved. The elastic body is also compatible with this, and therefore it is not necessary to re-tighten the jack bolt. Also, since the elastic body is interposed, the tightening force can be kept constant, and as a result, the superconducting field coil can be fixed. Can be made uniform, and there is an effect that a rotor of a superconducting rotating electric machine having a highly reliable superconducting field coil can be obtained.
第１図はこの発明の一実施例による要部断面図、第２図
は従来の超電導回転電機の回転子全体の概略を示す断面
図、第３図は第２図におけるIII−III線に沿う断面図、
第４図は第２図の超電導界磁コイルの締付状態を断面図
である。 図において、（２）……コイル取付軸、（2a）……歯
部、（2b）……メネジ、（３）……超電導界磁コイル、
（17）……溝、（18）……溝内絶縁、（24）……ボル
ト、（25）……ジャッキボルト、（31）……弾性体（皿
ばね）。 なお、各図中、同一符号は同一又は相当部分を示す。FIG. 1 is a sectional view of an essential part according to an embodiment of the present invention, FIG. 2 is a sectional view showing an outline of the entire rotor of a conventional superconducting rotating electric machine, and FIG. 3 is taken along line III-III in FIG. Cross section,
FIG. 4 is a sectional view showing the tightened state of the superconducting field coil of FIG. In the figure, (2) ... coil mounting shaft, (2a) ... teeth, (2b) ... female screw, (3) ... superconducting field coil,
(17) …… groove, (18) …… inside groove insulation, (24) …… bolt, (25) …… jack bolt, (31) …… elastic body (disc spring). In each figure, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−208859（ＪＰ，Ａ) 特開 昭61−18348（ＪＰ，Ａ) 実開 昭61−81757（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-208859 (JP, A) JP-A-61-18348 (JP, A) Practical application Sho-61-81757 (JP, U)
Claims (1)
挿入する工程と、 上記コイル取付軸の外周面を囲むように締付けリングを
上記コイル取付軸に固定する工程と、 上記超電導界磁コイルに対向して上記締付けリングにね
じ係合しているジャッキボルトを締め付け、上記ジャッ
キボルトと上記超電導界磁コイルとの間に配置された弾
性体を介して上記超電導界磁コイルを上記溝内に押圧し
て成形する工程と を含むことを特徴とする超電導回転電機の回転子におけ
る超電導界磁コイルの挿入成形方法。1. A step of inserting a superconducting field coil into a groove of a coil mounting shaft, a step of fixing a tightening ring to the coil mounting shaft so as to surround an outer peripheral surface of the coil mounting shaft, and the superconducting field magnet. Tighten a jack bolt that faces the coil and is screw-engaged with the tightening ring, and insert the superconducting field coil into the groove through an elastic body arranged between the jack bolt and the superconducting field coil. And a step of forming the superconducting field coil in the rotor of the superconducting rotating electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1073902A JP2529382B2 (en) | 1989-03-28 | 1989-03-28 | Insertion molding method of superconducting field coil in rotor of superconducting rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1073902A JP2529382B2 (en) | 1989-03-28 | 1989-03-28 | Insertion molding method of superconducting field coil in rotor of superconducting rotating electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02254963A JPH02254963A (en) | 1990-10-15 |
| JP2529382B2 true JP2529382B2 (en) | 1996-08-28 |
Family
ID=13531590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1073902A Expired - Fee Related JP2529382B2 (en) | 1989-03-28 | 1989-03-28 | Insertion molding method of superconducting field coil in rotor of superconducting rotating electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2529382B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2779399B2 (en) * | 1992-10-13 | 1998-07-23 | 三菱電機株式会社 | Method of manufacturing rotor for superconducting rotating electric machine |
-
1989
- 1989-03-28 JP JP1073902A patent/JP2529382B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02254963A (en) | 1990-10-15 |
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