JPH04281362A - Superconducting rotor - Google Patents
Superconducting rotorInfo
- Publication number
- JPH04281362A JPH04281362A JP3038360A JP3836091A JPH04281362A JP H04281362 A JPH04281362 A JP H04281362A JP 3038360 A JP3038360 A JP 3038360A JP 3836091 A JP3836091 A JP 3836091A JP H04281362 A JPH04281362 A JP H04281362A
- Authority
- JP
- Japan
- Prior art keywords
- end shaft
- superconducting
- current lead
- packing
- shaft
- 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.)
- Granted
Links
- 238000012856 packing Methods 0.000 claims abstract description 57
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000001307 helium Substances 0.000 abstract description 22
- 229910052734 helium Inorganic materials 0.000 abstract description 22
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 22
- 239000007789 gas Substances 0.000 abstract description 19
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 description 17
- 238000007789 sealing Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 101000622004 Crotalus atrox Snake venom metalloproteinase atrolysin-C Proteins 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
Landscapes
- Superconductive Dynamoelectric Machines (AREA)
Abstract
Description
［発明の目的］ [Purpose of the invention]
【０００１】0001
【産業上の利用分野】本発明は、回転子界磁巻線に超電
導巻線を用いた超電導回転電機の回転子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor for a superconducting rotating electric machine using a superconducting winding as a rotor field winding.
【０００２】0002
【従来の技術】従来の技術について、図２を用いて説明
する。超電導界磁巻線１は円筒状の巻線取付軸２に取り
付けられ、その外径側に真空断熱層３を介して設置され
た外筒４と共に、両端でタービン側端部軸５ａおよびＨ
ＴＣ側端部軸５ｂにて支持されている。回転中心軸上に
は、巻線取付軸内への液体ヘリウムの供給および蒸発ガ
スヘリウムの回収を行うヘリウム給排管６が、ＨＴＣ側
端部軸５ｂを軸方向に貫通して設置されている。その外
径側には、超電導界磁巻線に電流を供給する電流リード
７が電流リードガイド８に挿入され、同様にＨＴＣ側端
部軸５ｂを軸方向に貫通して設置されている。電流リー
ドガイド８は、巻線取付軸２およびＨＴＣ側端部軸５ｂ
に溶接され真空断熱層３の気密を保っている。電流リー
ド７は、機内側で超電導界磁巻線１と接続され、一方軸
端側では立ち上りスタッド９によりコレクタリング１０
と接続される。立ち上りスタッド９は、立ち上りスタッ
ド絶縁１１により対地絶縁される。電流リード７とＨＴ
Ｃ側端部軸５ｂの間には、電流リード７と電流リードガ
イド８の間隙を通って漏れてくるガスヘリウムが立ち上
りスタッド絶縁１１近傍に充満するのを防止するため、
例えばゴム等を用いたパッキン１２が設置されシールが
行われている。2. Description of the Related Art A conventional technique will be explained with reference to FIG. The superconducting field winding 1 is attached to a cylindrical winding mounting shaft 2, and together with an outer cylinder 4 installed on the outer diameter side with a vacuum insulation layer 3 interposed therebetween, a turbine-side end shaft 5a and H are attached at both ends.
It is supported by the TC side end shaft 5b. A helium supply/discharge pipe 6 for supplying liquid helium into the winding installation shaft and recovering evaporated helium gas is installed on the rotation center axis, passing through the HTC side end shaft 5b in the axial direction. . On the outer diameter side, a current lead 7 for supplying current to the superconducting field winding is inserted into a current lead guide 8, and is similarly installed so as to pass through the HTC side end shaft 5b in the axial direction. The current lead guide 8 is connected to the winding attachment shaft 2 and the HTC side end shaft 5b.
is welded to keep the vacuum insulation layer 3 airtight. The current lead 7 is connected to the superconducting field winding 1 on the inside of the machine, while the collector ring 10 is connected by a rising stud 9 on the shaft end side.
connected to. The rising stud 9 is insulated from the ground by the rising stud insulation 11. Current lead 7 and HT
In order to prevent gas helium leaking through the gap between the current lead 7 and the current lead guide 8 from rising up and filling the vicinity of the stud insulation 11 between the C-side end shaft 5b,
For example, a packing 12 made of rubber or the like is installed for sealing.
【０００３】0003
【発明が解決しようとする課題】上記のような構造をと
った場合、パッキン１２付近は、運転中電流リード７の
中を通って排出される低温ガスヘリウムにより低温にな
る。通常、パッキン１２は低温下ではシール能力が低下
するためガスヘリウムの漏れが生じ、立ち上りスタッド
絶縁１１近傍に充満することとなる。立ち上りスタッド
絶縁１１には沿面絶縁箇所が存在する。ガスヘリウムは
絶縁強度が非常に弱く、特に界磁電流制御型超電導発電
機において高いフォーシング電圧を印加した場合、立ち
上りスタッド絶縁１１での地絡の懸念があった。このよ
うに、電流リード７と電流リードガイド８の間の間隙で
は溶接等のシール構成がとれないため、漏れガスヘリウ
ムによる立ち上りスタッド絶縁１１の絶縁信頼性が劣る
こととなる。本発明は、以上に鑑みなされたもので、電
流リード絶縁信頼性の高い超電導回転子を提供すること
を目的とする。
［発明の構成］In the case of the above structure, the area around the packing 12 becomes low temperature due to the low temperature gas helium discharged through the current lead 7 during operation. Normally, the sealing ability of the packing 12 decreases at low temperatures, causing gas helium to leak and filling the vicinity of the rising stud insulation 11. The rising stud insulation 11 has creeping insulation locations. Gas helium has a very weak insulation strength, and there is a concern that a ground fault may occur in the rising stud insulation 11, especially when a high forcing voltage is applied in a field current controlled superconducting generator. As described above, since a sealing structure such as welding cannot be achieved in the gap between the current lead 7 and the current lead guide 8, the insulation reliability of the rising stud insulation 11 due to the leaked helium gas will be degraded. The present invention has been made in view of the above, and an object of the present invention is to provide a superconducting rotor with high current lead insulation reliability. [Structure of the invention]
【０００４】0004
【課題を解決するための手段】上記目的を達成するため
本発明においては、電流リードとＨＴＣ側端部軸の間に
設置されるパッキンを二重構造にする（以下、機内側よ
り第１パッキン、第２パッキン２）とともに、当該二重
パッキン間の空間とＨＴＣ側端部軸外部とを連通する通
風路を設置することにより当該空間の換気を行う。また
、さらに効率的換気を行うため、通風路を複数箇所に設
け、そのうちの少なくとも１本は端部軸外部との連通開
口部の回転半径を他のものより大きくとる。また、パッ
キンにおけるガスヘリウム漏れを防止するため、パッキ
ン部に温度センサとヒータを設置しパッキンの温度コン
トロールを行う。[Means for Solving the Problem] In order to achieve the above object, in the present invention, the packing installed between the current lead and the end shaft on the HTC side has a double structure (hereinafter, the first packing is , and the second packing 2), the space is ventilated by installing a ventilation passage that communicates the space between the double packings and the outside of the HTC side end shaft. Furthermore, in order to achieve more efficient ventilation, a plurality of ventilation passages are provided, and at least one of the ventilation passages has a larger radius of rotation of the opening communicating with the outside of the end shaft than the other passages. In addition, in order to prevent gas helium from leaking from the packing, a temperature sensor and a heater are installed in the packing to control the temperature of the packing.
【０００５】[0005]
【作用】本発明は上記のように構成されており、運転中
低温にさらされることにより万一パッキンのシール性能
が低下し、第１パッキンからガスヘリウム漏れを生じて
も、第２パッキンとの間の空間はＨＴＣ側端部軸外部と
を連通する通風路により換気が行われているため、ガス
ヘリウムがさらに第２パッキンから漏れてコレクタリン
グ部の対地絶縁近傍に充満することを防止することがで
きる。[Function] The present invention is constructed as described above, and even if the sealing performance of the packing deteriorates due to exposure to low temperatures during operation and gas helium leaks from the first packing, the connection between the second packing and the second packing should be maintained. Since the space between the two is ventilated by a ventilation passage that communicates with the outside of the HTC side end shaft, this prevents gas helium from further leaking from the second packing and filling the vicinity of the ground insulation of the collector ring. Can be done.
【０００６】また、ガスヘリウムは周囲のガス（空気等
）に比べて比重小さいため、回転重力場を考慮すると、
端部軸外部と連通する通風路を設けただけでは第１パッ
キンと第２パッキンとの間の空間に残留することが考え
られるため、第１パッキンと第２パッキンとの間の空間
と端部軸外部とを連通する通風路を複数箇所に設け、そ
のうちの少なくとも１本は、端部軸外部との連通開口部
の回転半径を他のものより大くとることにより、回転重
力場において、前記回転半径を大きくとった通風路を排
気路、他の通風路を吸気路として強制通風換気を行うこ
とが可能となり、効率的に換気を行うことができる。[0006] Also, since the specific gravity of gas helium is smaller than that of surrounding gases (air, etc.), when considering the rotating gravitational field,
If only a ventilation passage is provided that communicates with the outside of the end shaft, it may remain in the space between the first packing and the second packing, so the space between the first packing and the second packing and the end part By providing a plurality of ventilation passages that communicate with the outside of the shaft, and at least one of them having a radius of rotation of the opening communicating with the outside of the shaft at the end thereof being larger than that of the other, the above-mentioned It becomes possible to perform forced draft ventilation by using the ventilation passage with a large rotation radius as the exhaust passage and the other ventilation passage as the intake passage, so that ventilation can be performed efficiently.
【０００７】また、運転中パッキン近傍の温度が、パッ
キンのシール性能低下をきたすような低温になる場合、
パッキン近傍に設置された温度センサにより温度を検知
し、パッキン近傍に設置されたヒータを運転して、パッ
キンの温度がそれ以上低下しないように温度コントロー
ルを行う。これにより、パッキンのシール性能低下を防
止することができる。[0007] Furthermore, if the temperature near the packing during operation becomes low enough to cause a decrease in the sealing performance of the packing,
A temperature sensor installed near the packing detects the temperature, and a heater installed near the packing is operated to control the temperature so that the packing temperature does not drop any further. Thereby, it is possible to prevent the sealing performance of the packing from deteriorating.
【０００８】[0008]
【実施例】以下本発明の一実施例について、図１および
一部図２を参照して説明する。表面を電流リード絶縁７
ｂにより絶縁された電流リード７は電流リードガイド８
の中に挿入され、ＨＴＣ側端部軸５ｂを軸方向に貫通し
て設置されている。電流リードガイド８は巻線取付軸２
およびＨＴＣ側端部軸５ｂに溶接され、真空断熱層３の
気密を保っている。電流リード７は、機内側で超電導界
磁巻線１と接続され、一方軸端側では立ち上りスタッド
９によりコレクタリング１０と接続されいる。立ち上り
スタッド９は、立ち上りスタッド絶縁１１により対地絶
縁されている。電流リード７とＨＴＣ側端部軸５ｂの間
には、電流リード７と電流リードガイド８の間の間隙を
通って漏れてくるガスヘリウムが立ち上りスタッド絶縁
１１近傍に充満するのを防止するため、例えばゴム等を
用いたパッキン１２が設置されシールが行われている。
パッキン１２は、ＨＴＣ側端部軸５ｂと、さらにその軸
端側のコレクタリング継シャフト１６とのカップリング
部に設置される。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1 and a portion of FIG. 2. Current lead insulation on the surface 7
The current lead 7 insulated by b is connected to the current lead guide 8
The HTC side end shaft 5b is inserted into the HTC side end shaft 5b in the axial direction. The current lead guide 8 is attached to the winding mounting shaft 2
and is welded to the HTC side end shaft 5b to keep the vacuum insulation layer 3 airtight. The current lead 7 is connected to the superconducting field winding 1 on the inside of the machine, and is connected to the collector ring 10 by a rising stud 9 on the shaft end side. The rising stud 9 is insulated from the ground by a rising stud insulation 11. Between the current lead 7 and the HTC side end shaft 5b, in order to prevent gas helium leaking through the gap between the current lead 7 and the current lead guide 8 from rising and filling the vicinity of the stud insulation 11, For example, a packing 12 made of rubber or the like is installed for sealing. The packing 12 is installed at a coupling portion between the HTC side end shaft 5b and a collector ring joint shaft 16 on the shaft end side.
【０００９】パッキン１２は、機内側より第１パッキン
１２ａ、第２パッキン１２ｂで構成される二重パッキン
とする。当該二重パッキン間の空間とＨＴＣ側端部軸５
ｂ外部とは通風管１３により連通している。通風管１３
は複数本とし、そのうち約半数（通風管１３ａ）は端部
軸カップリングフランジ部にて端部軸外部と連通し、残
り約半数（通風管１３ｂ）は端部軸胴部にて端部軸外部
と連通している。したがって、前者は後者より開口部の
回転半径が大きくとってある。また、パッキン１２部に
温度センサ１４とヒータ１５を設置し、パッキン１２の
温度コントロールを行う。The packing 12 is a double packing consisting of a first packing 12a and a second packing 12b from the inside of the machine. The space between the double packing and the HTC side end shaft 5
b It communicates with the outside through a ventilation pipe 13. Ventilation pipe 13
About half of them (ventilation pipes 13a) communicate with the outside of the end shaft at the end shaft coupling flange, and about half (ventilation pipes 13b) communicate with the outside of the end shaft at the end shaft body. communicates with the outside. Therefore, the rotation radius of the opening is set larger in the former than in the latter. Further, a temperature sensor 14 and a heater 15 are installed in the packing 12 to control the temperature of the packing 12.
【００１０】電流リード７と電流リードカイド８の間の
間隙を通って漏れてくるガスヘリウムは、まず第１パッ
キン１２ａにてシールされる。しかしながら、運転中低
温にさらされることにより万一パッキン１２ａのシール
性能が低下すると、第１パッキン１２ａからガスヘリウ
ム漏れを生じる可能性があるが、第２パッキン１２ｂと
の間の空間は、回転重力場において、通風管１３ａおよ
び通風管１３ｂのＨＴＣ側端部軸５ｂ外部との連通開口
部の回転半径差に基づく圧力による強制通風換気が行わ
れており、ガスヘリウムがさらに第２パッキン１２ｂか
ら漏れて立ち上りスタッド絶縁１１近傍に充満するのを
防止することができる。Gas helium leaking through the gap between the current lead 7 and the current lead guide 8 is first sealed by the first packing 12a. However, if the sealing performance of the packing 12a deteriorates due to exposure to low temperatures during operation, gas helium may leak from the first packing 12a, but the space between it and the second packing 12b is At the site, forced ventilation was performed using pressure based on the difference in the rotation radius of the communication opening between the HTC side end shaft 5b and the outside of the ventilation pipe 13a and ventilation pipe 13b, and gas helium was further leaked from the second packing 12b. It is possible to prevent the rising stud insulation 11 from being filled with the surrounding studs.
【００１１】また、運転中パッキン１２近傍の温度が、
パッキン１２のシール性能低下をきたすような低温にな
る場合、パッキン１２近傍に設置された温度センサ１４
により温度を検知し、パッキン１２近傍に設置されたヒ
ータ１５を運転して、パッキン１２の温度がそれ以上低
下しないように温度コントロールを行う。これにより、
パッキン１２のシール性能低下を防止することができ、
ガスヘリウムがパッキン１２から漏れて立ち上りスタッ
ド絶縁１１近傍に充満するのを防止することができる。
なお、パッキン１２の温度コントロールを行う場合、必
ずしも前述の二重パッキンや通風管構成と併用する必要
はない。[0011] Also, during operation, the temperature near the packing 12 is
When the temperature becomes low enough to degrade the sealing performance of the packing 12, the temperature sensor 14 installed near the packing 12
Detects the temperature and operates the heater 15 installed near the packing 12 to control the temperature so that the temperature of the packing 12 does not drop any further. This results in
It is possible to prevent the sealing performance of the packing 12 from deteriorating,
Gas helium can be prevented from leaking from the packing 12 and filling the vicinity of the rising stud insulation 11. In addition, when controlling the temperature of the packing 12, it is not necessarily necessary to use the above-mentioned double packing and ventilation pipe configuration together.
【００１２】他の実施例としてパッキン１２近傍に設置
された温度センサ１４により温度を検知してヒータ１５
を駆動するための温度コントローラ（図示せず）は、回
転子内に設置し、電源のみ回転子外からスリップリング
（図示せず）により供給してヒータ１５を駆動してもよ
いし、固定側に設置し、温度センサ１４の信号をＦＭ電
波などの非接触伝送装置（図示せず）あるいはスリップ
リング（図示せず）により一度固定子側に取り出し改め
てスリップリングを介してヒータ１５を駆動してもよい
。また、後者の場合、温度センサ１４により警報装置を
駆動するように構成することにより保護・監視の上でさ
らに有効である。As another embodiment, the temperature is detected by a temperature sensor 14 installed near the packing 12 and the heater 15 is
A temperature controller (not shown) for driving the heater 15 may be installed inside the rotor, and power may be supplied from outside the rotor through a slip ring (not shown) to drive the heater 15; The signal from the temperature sensor 14 is once sent to the stator side using a non-contact transmission device such as FM radio waves (not shown) or a slip ring (not shown), and then the heater 15 is driven via the slip ring. Good too. In the latter case, it is more effective for protection and monitoring by configuring the alarm device to be driven by the temperature sensor 14.
【００１３】[0013]
【発明の効果】以上述べたように、本発明によれば、機
内より漏れ出たガスヘリウムが沿面絶縁箇所のある立ち
上りスタッド絶縁近傍に充満して起こる地絡事故を防止
することが可能となり、電流リード絶縁信頼性の高い超
電導回転子を提供することができる。[Effects of the Invention] As described above, according to the present invention, it is possible to prevent ground faults caused by gas helium leaking from inside the machine filling the vicinity of the rising stud insulation where the creeping insulation part is located. A superconducting rotor with highly reliable current lead insulation can be provided.
【図１】本発明による電流リード部要図。FIG. 1 is a schematic diagram of a current lead part according to the present invention.
【図２】従来方式による超電導回転子全体図。FIG. 2 is an overall diagram of a conventional superconducting rotor.
１…界磁巻線
２…巻線取付軸３…真空断熱層
４…外筒５ａ…ター
ビン側端部軸 ５ｂ…ＨＴ
Ｃ側端部軸
６…ヘリウム給排管
７…電流リード８…電流リードガイド
９…立上りスタッド
１０…コレクタリング
１１…立上りスタッド絶縁
１２…パッキン
１３，１３ａ，１３ｂ…通風管
１４…温度センサ
１５…ヒータ１６…コレクタリング継ぎシャ
フト1...Field winding
2...Winding mounting shaft 3...Vacuum insulation layer
4...Outer cylinder 5a...Turbine side end shaft 5b...HT
C side end shaft 6...Helium supply/discharge pipe
7...Current lead 8...Current lead guide
9...Rising stud 10...Collector ring
11...Rising stud insulation 12...Packing
13, 13a, 13b... Ventilation pipe 14... Temperature sensor
15... Heater 16... Collector ring joint shaft
Claims (3)
状巻線取付軸と、その外径側に真空断熱層を介して外筒
を有し、それらが両端で端部軸にて支持されてなる超電
導回転子において、超電導界磁巻線に電流を供給するた
め端部軸を軸方向に貫通して設置される電流リードと端
部軸との間のギャップの気密シールを二重パッキン構造
とし、当該二重パッキン間の空間と端部軸外部とを連通
する通風路を設けたことを特徴とする超電導回転子。[Claim 1] A cylindrical winding mounting shaft to which a superconducting field winding is attached, and an outer cylinder on the outer diameter side with a vacuum insulation layer interposed therebetween, and these are supported at both ends by end shafts. In the superconducting rotor, a double packing structure is used to airtightly seal the gap between the current lead and the end shaft, which are installed axially through the end shaft to supply current to the superconducting field winding. A superconducting rotor characterized in that the space between the double packings is provided with a ventilation passage communicating with the outside of the end shaft.
を連通する通風路を複数箇所に設け、そのうちの少なく
とも１箇所は端部軸外部との連通開口部の回転半径を他
のものより大きくとったことを特徴とする請求項１記載
の超電導回転子。[Claim 2] A plurality of ventilation passages communicating between the space between the double packings and the outside of the end shaft are provided, and at least one of the ventilation passages has a rotation radius of an opening communicating with the outside of the end shaft that is different from the radius of rotation of the opening communicating with the outside of the end shaft. The superconducting rotor according to claim 1, characterized in that the rotor is larger.
状巻線取付軸と、その外径側に真空断熱層を介して外筒
を有し、それらが両端で端部軸にて支持されてなる超電
導回転子において、超電導界磁巻線に電流を供給するた
め端部軸を軸方向に貫通して設置される電流リードと端
部軸との間のギャップの気密シールパッキン部に温度監
視センサとヒータを設置し、気密シールパッキン部の温
度低下を検知してヒータを自動運転することを特徴とす
る超電導回転子。[Claim 3] A cylindrical winding mounting shaft to which a superconducting field winding is attached, and an outer cylinder on the outer diameter side thereof with a vacuum insulation layer interposed therebetween, and these are supported at both ends by end shafts. In superconducting rotors, temperature monitoring is carried out in the airtight seal packing part of the gap between the current lead and the end shaft, which are installed axially through the end shaft to supply current to the superconducting field winding. A superconducting rotor equipped with a sensor and a heater, which automatically operates the heater by detecting a temperature drop in the airtight seal packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03836091A JP3210353B2 (en) | 1991-03-05 | 1991-03-05 | Superconducting rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03836091A JP3210353B2 (en) | 1991-03-05 | 1991-03-05 | Superconducting rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04281362A true JPH04281362A (en) | 1992-10-06 |
| JP3210353B2 JP3210353B2 (en) | 2001-09-17 |
Family
ID=12523117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03836091A Expired - Fee Related JP3210353B2 (en) | 1991-03-05 | 1991-03-05 | Superconducting rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3210353B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6456408B1 (en) | 1998-03-26 | 2002-09-24 | Lucent Technologies Inc. | Method and apparatus for controlling the optical power of a optical transmission signal |
| US6794792B2 (en) * | 2002-11-13 | 2004-09-21 | General Electric Company | Cold structural enclosure for multi-pole rotor having super-conducting field coil windings. |
| US6798565B2 (en) * | 2000-08-16 | 2004-09-28 | Siemens Aktiengesellschaft | Method and arrangement for compensating for cross phase modulation |
-
1991
- 1991-03-05 JP JP03836091A patent/JP3210353B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6456408B1 (en) | 1998-03-26 | 2002-09-24 | Lucent Technologies Inc. | Method and apparatus for controlling the optical power of a optical transmission signal |
| US6798565B2 (en) * | 2000-08-16 | 2004-09-28 | Siemens Aktiengesellschaft | Method and arrangement for compensating for cross phase modulation |
| US6794792B2 (en) * | 2002-11-13 | 2004-09-21 | General Electric Company | Cold structural enclosure for multi-pole rotor having super-conducting field coil windings. |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3210353B2 (en) | 2001-09-17 |
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