JPS6110461Y2 - - Google Patents
Info
- Publication number
- JPS6110461Y2 JPS6110461Y2 JP1977077344U JP7734477U JPS6110461Y2 JP S6110461 Y2 JPS6110461 Y2 JP S6110461Y2 JP 1977077344 U JP1977077344 U JP 1977077344U JP 7734477 U JP7734477 U JP 7734477U JP S6110461 Y2 JPS6110461 Y2 JP S6110461Y2
- Authority
- JP
- Japan
- Prior art keywords
- exciter
- phase
- rectifier
- magnetic flux
- output
- 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
Links
- 230000004907 flux Effects 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Synchronous Machinery (AREA)
Description
【考案の詳細な説明】
本考案は例えばタービン同期発電機などに適用
されるブラシなし励磁装置における回転整流素子
で構成された整流回路の欠相検出装置に関し、整
流素子の事故監視がブラシ、スリツプリングを用
いることなく固定側で連続的に行える有利な欠相
検出装置を提供することを目的とする。[Detailed description of the invention] The present invention relates to an open phase detection device for a rectifier circuit composed of rotating rectifying elements in a brushless excitation device applied to a turbine synchronous generator, etc. It is an object of the present invention to provide an advantageous open phase detection device that can be continuously operated on a fixed side without using a ring.
先ず第１図を用いてブラシなし励磁装置の構成
を説明する。図において１は例えばタービン発電
機の電機子、２が回転界磁巻線、３が主機と同一
軸に連結された交流励磁機であり４がその回転電
機子、５が固定子磁極に巻装された界磁巻線であ
る。交流励磁器３と主機の界磁巻線２とは同じ回
転軸上に設置された整流素子６、例えばシリコン
ダイオードをブリツジ接続してある整流回路７を
介してブラシ、スリツプリングを用いることなく
直接接続されている。８は整流回路７の各素子ア
ームに介挿接続されたヒユーズである。即点線で
包囲された部分が回転部となる。 First, the configuration of the brushless excitation device will be explained using FIG. In the figure, 1 is, for example, the armature of a turbine generator, 2 is a rotating field winding, 3 is an AC exciter connected to the same axis as the main engine, 4 is the rotating armature, and 5 is the winding around the stator magnetic poles. This is the field winding. The AC exciter 3 and the field winding 2 of the main engine are connected directly to each other via a rectifier circuit 7 in which a rectifier element 6 installed on the same rotating shaft, such as a silicon diode, is bridge-connected without using brushes or slip rings. It is connected. A fuse 8 is inserted and connected to each element arm of the rectifier circuit 7. The part surrounded by the dotted line is the rotating part.
上記のブラシなし励磁装置において、運転中に
整流素子６の一部が整流作用の喪失故障を惹起す
ることがある。この故障の際には整流回路７のブ
リツヂ短絡となり、他の健全な整流素子も破損さ
れる恐れがあるから、直ちにヒユーズ８の応動動
作により故障素子のアームを解列して回路の保護
を行わせている。しかして３相全波整流回路では
仮に１つの素子アームが解列されても直ちに主機
の界磁巻線２に対する励磁電流の給電が喪失する
ことはないから、このままでは欠相の判別が行え
ない。また回転している部位からブラシ、スリツ
プリングを介して励磁電流を検出して監視せるこ
とも考えられることがこの方法ではブラシなしの
特長を活かせる。このために従来ではヒユーズに
動作表示装置を設けておき、これを運転中にスト
ロボによつて目視的に監視することが行われてい
た。しかしながらストロボで常時目視監視するこ
とは実際上不可能であり、間欠的な監視とならざ
るを得ない。この場合には監視してない間に欠相
事故が発生しても直ちに検出できず、欠相のまま
運転されることとなり、主機の正常な運転が確立
できない。なお同じ整流回路７の事故でも各アー
ム全ての整流素子が故障すれば主機の界磁巻線２
での励磁が確立せず、主機の出力を監視している
ことによつて事故を検知し、保護処置が施せる。
従つて欠相事故の際の検出が特に必要となる。 In the brushless excitation device described above, a part of the rectifying element 6 may lose its rectifying action and cause a failure during operation. In the event of this failure, a bridge short circuit will occur in the rectifier circuit 7, and other healthy rectifier elements may also be damaged. Therefore, the arm of the faulty element is immediately disconnected by the response action of the fuse 8 to protect the circuit. I'm letting it go. However, in a three-phase full-wave rectifier circuit, even if one element arm is disconnected, the supply of excitation current to the field winding 2 of the main engine will not be immediately lost, so it is not possible to determine whether a phase is missing in this state. . It is also conceivable that the excitation current can be detected and monitored from the rotating part via brushes and slip rings, and this method can take advantage of the brushless feature. For this purpose, conventionally, the fuse has been provided with an operation display device, and this has been visually monitored using a strobe during operation. However, it is practically impossible to perform constant visual monitoring using a strobe light, so intermittent monitoring is required. In this case, even if an open phase accident occurs while not being monitored, it cannot be detected immediately and the engine continues to operate with the open phase, making it impossible to establish normal operation of the main engine. In addition, even in the case of an accident in the same rectifier circuit 7, if all rectifier elements in each arm fail, the field winding 2 of the main engine
If excitation is not established at the main engine, an accident can be detected by monitoring the output of the main engine, and protective measures can be taken.
Therefore, detection in the event of an open phase accident is especially necessary.
本考案はブラシなしの特長を活かして外方より
電気的に連続監視による欠相検出が行えるように
したことを目的としたものであり、そのためには
交流励磁機内における欠相に伴なう磁束変化を巧
みに利用した点に基礎を置く。即ち主機の界磁電
流は交流励磁機の電機子電流に比例している。し
かも上述の励磁装置のように負荷が直流側に大き
なインダクタンスをもつ整流回路である場合に
は、整流回路７における各整流素子６間で転流す
る交流励磁機電機子電流の電機子反作用により、
機内の直軸磁束は交流励磁機定格周波数の６倍の
周波数で変動する成分を有することになる。そか
も整流回路７内における整流素子６の故障により
ヒユーズ８が動作して欠相が生じた際には、前記
の機内磁束が欠相に伴つて変化する。このような
考案を基礎として本考案は上記目的達成のため
に、交流励磁機の固定子側にて回転電機子に対し
て磁束変化検出用サーチコイルを設置するととも
に、サーチコイルの出力のうち欠相時に生じる高
調波出力分をフイルタを介して取出し検出器で欠
相検出を行わせるよう構成する。この場合にサー
チコイルは直軸磁束の変化を検出するよう固定子
磁極上にサーチコイルを巻線配置して実施され
る。 The purpose of this invention is to take advantage of the brushless feature to detect phase loss through continuous electrical monitoring from the outside. It is based on the skillful use of change. That is, the field current of the main machine is proportional to the armature current of the AC exciter. Moreover, when the load is a rectifier circuit with a large inductance on the DC side, as in the above-mentioned excitation device, due to the armature reaction of the AC exciter armature current commutated between each rectifier element 6 in the rectifier circuit 7,
The direct-axis magnetic flux inside the machine has a component that fluctuates at a frequency six times the rated frequency of the AC exciter. Furthermore, when the fuse 8 is activated due to a failure of the rectifying element 6 in the rectifier circuit 7 and an open phase occurs, the internal magnetic flux changes as a result of the open phase. Based on these ideas, the present invention aims to achieve the above objectives by installing a search coil for detecting changes in magnetic flux with respect to the rotating armature on the stator side of an AC exciter, and detecting the missing part of the output of the search coil. The configuration is such that the harmonic output generated during phase phase is extracted through a filter and detected by a detector. In this case, the search coil is wound around the stator magnetic poles so as to detect changes in the direct-axis magnetic flux.
次に本考案を図示の実施例に基ずいて説明す
る。第１図、第２図において、本考案により交流
励磁機３における回転電機子４に対向して固定子
磁極９上にて界磁巻線５と同軸に直軸磁束検出用
のサーチコイル１２が巻装配置されていて、直軸
磁束検出用のサーチコイル１２は直軸磁束の変化
を検出する。上記直軸磁束検出用のサーチコイル
１２を用いた各運転状態における出力波形を試験
によつて測定した第３図、第４図のオシログラフ
に示す。第３図は健全な運転状態、第４図は整流
回路７における一部の整流素子例えば６１が故障
し同じアームに属するヒユーズ８１が動作して欠
相した運転状態を示す。各図においてＶDCは整流
回路の出力直流電圧、Ifは交流励磁機３の界磁電
流、Vsは直軸磁束検出用のサーチコイル１２の
出力電圧を示している。なお試験に際しては直流
側出力電圧ＶDC測定のために特にブラシとスリツ
プリングを用いて測定した。各図のオシログラフ
より明かなる如く、第３図の健全運転時と比較し
て、第４図の欠相運転時には整流回路７の出力直
流電圧波形が欠相アームに相応して局部的に急激
に下降変化している。この変化に対して交流励磁
機３の界磁電流Ifは波形の変化があるが左程顕著
な変化が現われない。一方直軸磁束検出用のサー
チコイル１２の出力電圧Vsの波形には、健全運
転時と較べて高調波成分が加わつた波形となる。
従つてこの高調波出力分を検出すれば欠相検出を
行うことができる。このために本考案によれば第
２図に示す如く、１２の出力側には高調波出力成
分のみを通過させる帯域フイルタ１３が接続され
ている。更にフイルタ１３にはフイルタ１３の出
力で動作する欠相検出器１４が接続されている。
検出器は例えばランプ、ブザーなどの警報器が用
いられる。 Next, the present invention will be explained based on the illustrated embodiments. 1 and 2, according to the present invention, a search coil 12 for detecting a direct-axis magnetic flux is provided coaxially with the field winding 5 on the stator magnetic pole 9, facing the rotating armature 4 in the AC exciter 3. A search coil 12 for detecting the direct-axis magnetic flux, which is arranged in a winding manner, detects changes in the direct-axis magnetic flux. Output waveforms in various operating conditions using the search coil 12 for detecting the direct-axis magnetic flux are shown in the oscillographs of FIGS. 3 and 4, which were measured through tests. FIG. 3 shows a normal operating state, and FIG. 4 shows an operating state in which some of the rectifying elements in the rectifying circuit 7, for example 61 , have failed and a fuse 81 belonging to the same arm has operated, resulting in an open phase. In each figure, V DC indicates the output DC voltage of the rectifier circuit, If indicates the field current of the AC exciter 3, and Vs indicates the output voltage of the search coil 12 for detecting the direct-axis magnetic flux. During the test, a brush and a slip ring were used to measure the DC side output voltage V DC . As is clear from the oscillograms in each figure, the output DC voltage waveform of the rectifier circuit 7 is locally sharp in response to the open-phase arm during the open-phase operation shown in Fig. 4, compared to the normal operation shown in Fig. 3. It is changing downward. In response to this change, there is a change in the waveform of the field current If of the AC exciter 3, but the change is not as noticeable as on the left. On the other hand, the waveform of the output voltage Vs of the search coil 12 for detecting the direct-axis magnetic flux has a waveform with harmonic components added compared to the normal operation.
Therefore, phase loss can be detected by detecting this harmonic output. For this purpose, according to the present invention, as shown in FIG. 2, a bandpass filter 13 is connected to the output side of the filter 12 to pass only harmonic output components. Furthermore, an open phase detector 14 that operates based on the output of the filter 13 is connected to the filter 13 .
For example, an alarm such as a lamp or a buzzer is used as the detector.
上記の構成によれば整流回路の状況をブラシ、
スリツプリングなどを用いることなく交流励磁機
３における固定子側にて連続監視することができ
る。即ち運転中に一部整流素子６の逆方向特性劣
化により整流作用が喪失し、整流回路７の内部短
絡が生じてヒユーズ８が動作すれば故障整流素子
のアームが整流ブリツジ回路より解列されて欠相
状態となる。この際には交流励磁機３における電
機子反作用によつて機内の磁束が変化するのでこ
の磁束変化が直ちに直軸磁束検出用のサーチコイ
ル１２によつて検出され、フイルタ１３を介して
検出器１４をを動作させる。 According to the above configuration, the situation of the rectifier circuit is brushed,
Continuous monitoring can be performed on the stator side of the AC exciter 3 without using a slip ring or the like. That is, during operation, if some of the rectifying elements 6 lose their rectifying action due to deterioration of their reverse characteristics, and an internal short circuit occurs in the rectifying circuit 7, causing the fuse 8 to operate, the arm of the faulty rectifying element will be disconnected from the rectifying bridge circuit. It becomes an open phase state. At this time, the magnetic flux inside the machine changes due to the armature reaction in the AC exciter 3, so this change in magnetic flux is immediately detected by the search coil 12 for detecting the direct axis magnetic flux, and then passed through the filter 13 to the detector 14. make it work.
以上の如く本考案によれば、従来ストロボによ
りヒユーズの動作を目視的に検知していた方式に
較べて、故障発生が直ちに検知でき、主機を適正
運転するための保守点検に有利な欠相検出装置が
提供できる。 As described above, according to the present invention, compared to the conventional method of visually detecting fuse operation using a strobe, failure occurrence can be detected immediately, and open phase detection is advantageous for maintenance and inspection to ensure proper operation of the main engine. Equipment can be provided.
第１図、第２図はそれぞれ異なる実施例を同時
に示した本考案実施例の回路構成図、第３図、第
４図はそれぞれ健全運転状態および欠相運転状態
における各種電流、電圧を表わすオシログラフで
ある。
２：主機の回転界磁巻線、３：交流励磁機、
４：交流励磁機の回転電機子、５：固定子界磁巻
線、６：整流素子、７：整流回路、８：ヒユー
ズ、９：固定子磁極、１２：直軸磁束検出用のサ
ーチコイル、１３：フイルタ、１４：検出器。
Figs. 1 and 2 are circuit configuration diagrams of an embodiment of the present invention showing different embodiments at the same time, and Figs. 3 and 4 are oscilloscopes showing various currents and voltages in a healthy operating state and an open-phase operating state, respectively. It is a graph. 2: Main engine rotating field winding, 3: AC exciter,
4: Rotating armature of AC exciter, 5: Stator field winding, 6: Rectifier element, 7: Rectifier circuit, 8: Fuse, 9: Stator magnetic pole, 12: Search coil for direct axis magnetic flux detection, 13: Filter, 14: Detector.
Claims (1)
各アームにヒユーズを備えたブリツジ接続の回転
整流器を介して主機の回転界磁巻線へ励磁電流を
給電するブラシなし励磁装置の整流回路の欠相を
検出する装置であつて、前記交流励磁機における
電機子と対向して固定子磁極上に巻装配置され欠
相に基づく直軸磁束の変化を検出するサーチコイ
ルと、該サーチコイルの出力側に接続して前記整
流器の欠相時に交流励磁機における磁束変化で生
じるサーチコイルの高調波出力分を取出すフイル
タと、該フイルタの出力により動作する検出器と
を備えたことを特徴とするブラシなし励磁装置に
おける整流回路の欠相検出装置。 A lack of a rectifier circuit in a brushless exciter that supplies excitation current from the rotating armature of an AC exciter connected to the main engine to the rotating field winding of the main engine via a bridge-connected rotary rectifier with a fuse in each arm. A device for detecting a phase, the search coil being wound on a stator magnetic pole facing the armature in the AC exciter and detecting a change in direct axis magnetic flux based on an open phase, and an output of the search coil. A brush comprising: a filter connected to the side of the rectifier to extract harmonic output of the search coil caused by a change in magnetic flux in the AC exciter when the rectifier loses phase; and a detector operated by the output of the filter. Phase open detection device for rectifier circuit in excitation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977077344U JPS6110461Y2 (en) | 1977-06-14 | 1977-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1977077344U JPS6110461Y2 (en) | 1977-06-14 | 1977-06-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS544313U JPS544313U (en) | 1979-01-12 |
| JPS6110461Y2 true JPS6110461Y2 (en) | 1986-04-03 |
Family
ID=28993454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1977077344U Expired JPS6110461Y2 (en) | 1977-06-14 | 1977-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110461Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49105906A (en) * | 1973-02-15 | 1974-10-07 |
-
1977
- 1977-06-14 JP JP1977077344U patent/JPS6110461Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49105906A (en) * | 1973-02-15 | 1974-10-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS544313U (en) | 1979-01-12 |
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