JPH0449341B2 - - Google Patents
Info
- Publication number
- JPH0449341B2 JPH0449341B2 JP60254827A JP25482785A JPH0449341B2 JP H0449341 B2 JPH0449341 B2 JP H0449341B2 JP 60254827 A JP60254827 A JP 60254827A JP 25482785 A JP25482785 A JP 25482785A JP H0449341 B2 JPH0449341 B2 JP H0449341B2
- Authority
- JP
- Japan
- Prior art keywords
- spark
- noise
- antenna
- current collector
- external noise
- 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
- 230000005284 excitation Effects 0.000 claims description 13
- 238000012806 monitoring device Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Motor Or Generator Current Collectors (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は集電装置の火花監視装置に係り、特に
タービン発電機などの回転電機に使用される集電
装置から発生する火花を監視するに好適な集電装
置の火花監視装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a spark monitoring device for a current collector, and is particularly suitable for monitoring sparks generated from a current collector used in a rotating electric machine such as a turbine generator. This invention relates to a spark monitoring device for a current collector.
タービン発電機などの回転電機においては、そ
の回転界磁巻線に励磁電流を供給するため、集電
環およびブラシからなる集電装置が設けられてい
る。この集電環やブラシが損傷して火花が発生す
ると、回転電機の異常運転につながる虞れがある
ので、これを常時監視する必要がある。
2. Description of the Related Art A rotating electric machine such as a turbine generator is provided with a current collector consisting of a current collecting ring and a brush in order to supply excitation current to its rotating field winding. If the current collecting ring or brushes are damaged and sparks are generated, there is a risk that the rotating electric machine will malfunction, so it is necessary to constantly monitor this.
この種の火花監視装置として、従来光電管方式
のものが一般に知られている。しかし、この方式
では、受光部の受光範囲に制限があり、かつブラ
シ底面などで発生する火花を捕えることができな
いため、火花の発生を広範囲にかつ正確に監視す
ることは困難である。 As this type of spark monitoring device, a phototube type device is generally known. However, with this method, the light-receiving range of the light-receiving section is limited, and sparks generated at the bottom of the brush cannot be captured, so it is difficult to accurately monitor spark generation over a wide range.
そこで、アンテナ方式火花監視装置が提案され
ている。この方式は、集電装置の周辺にアンテナ
を設置し、このアンテナで火花の発生を電磁波、
つまり火花ノイズとして捕え、その波高値および
パルス幅などから火花発生の有無を判定するもの
である。この方式によれば、集電装置全域におけ
る火花の発生を感度よく監視することができる
が、集電装置の火花ノイズ以外の電磁波ノイズ、
例えば蛍光灯の放電や溶接機のアークによる電磁
波ノイズをもアンテナが捕えてしまうため、これ
らの外部ノイズを集電装置の火花ノイズと誤つ
て、火花発生有りと判定してしまう欠点があつ
た。 Therefore, an antenna type spark monitoring device has been proposed. In this method, an antenna is installed around the current collector, and this antenna uses electromagnetic waves to generate sparks.
In other words, it is captured as spark noise, and the presence or absence of spark generation is determined from its peak value and pulse width. According to this method, the occurrence of sparks in the entire area of the current collector can be monitored with high sensitivity, but electromagnetic wave noise other than the spark noise of the current collector,
For example, because the antenna captures electromagnetic noise caused by the discharge of a fluorescent lamp or the arc of a welding machine, it has the disadvantage that these external noises can be mistaken for spark noise from the current collector and determined to be the presence of sparks.
また、ブラシに励磁電流を供給するための励磁
用電源にのつてくる火花による高調波電圧ノイズ
を検出して火花発生の有無を判定するCM結合方
式火花監視装置も知られている。しかし、この方
式においても、火花ノイズ以外の外部ノイズを拾
つて誤つた判定を下す虞れがあつた。 Further, a CM coupling type spark monitoring device is also known, which detects harmonic voltage noise caused by sparks coming to an excitation power source for supplying excitation current to the brushes and determines whether or not a spark is generated. However, even in this method, there is a risk that external noise other than spark noise may be picked up and an incorrect determination may be made.
さらに、近時前記アンテナ方式とCM結合方式
の火花ノイズ検出装置を組み合せ、両火花ノイズ
検出装置から同時に検出信号が得られたときのみ
火花発生有りと判定する方式も提案されている
（特開昭58−15452号公報参照）。しかし、この方
式においても、励磁用電源として直流発電機を用
いた場合、その整流子およびブラシ部分から常に
火花が発生しているので、集電装置での火花発生
の判定を正確に行なうことは困難であり、また励
磁用電源として交流電力を用い、サイリスタで整
流した場合、点弧時の電圧の立ち上がりも火花ノ
イズと一緒に検出されてしまい、この立ち上がり
を火花ノイズから除去する処理が困難であるの
で、この場合にも火花発生の判定を正確に行なう
ことは困難であつた。 Furthermore, a method has recently been proposed in which spark noise detection devices of the antenna type and CM combination type are combined, and it is determined that sparks have occurred only when detection signals are obtained from both spark noise detection devices at the same time (Japanese Patent Application Laid-Open No. (See Publication No. 58-15452). However, even in this method, when a DC generator is used as the excitation power source, sparks are always generated from the commutator and brushes, so it is difficult to accurately determine whether sparks occur in the current collector. Furthermore, if AC power is used as the excitation power source and rectified by a thyristor, the voltage rise at the time of ignition will be detected along with the spark noise, making it difficult to remove this rise from the spark noise. Therefore, it has been difficult to accurately determine the occurrence of sparks in this case as well.
本発明の目的は、上記した従来技術の欠点を除
去し、集電装置で発生する火花ノイズ以外の外部
ノイズによる誤つた判定をなくすことのできる信
頼性の高い集電装置の火花監視装置を提供するこ
とにある。
An object of the present invention is to provide a highly reliable spark monitoring device for a current collector that eliminates the drawbacks of the prior art described above and eliminates erroneous judgments caused by external noise other than spark noise generated in the current collector. It's about doing.
この目的を達成するため、本発明は、集電環お
よびブラシの周辺に、火花ノイズと外部ノイズを
電磁波信号として受信する第１のアンテナと、こ
の第１のアンテナで受信できる外部ノイズと同程
度の外部ノイズを電磁波信号として受信する第２
のアンテナを設け、これらの各アンテナで受信さ
れた電磁波信号の差を火花ノイズとして検出する
ようにしたことを特徴とする。
To achieve this objective, the present invention provides a first antenna that receives spark noise and external noise as electromagnetic wave signals around the current collection ring and the brush, and an external noise that can be received by the first antenna. A second device receives external noise as an electromagnetic wave signal.
The present invention is characterized in that two antennas are provided, and the difference between the electromagnetic wave signals received by each of these antennas is detected as spark noise.
以下、本発明を図示の実施例に基づいて詳細に
説明する。
Hereinafter, the present invention will be explained in detail based on illustrated embodiments.
図は本発明の一実施例に係るタービン発電機の
集電装置の火花監視装置を示す電気回路図であ
る。この図において、１，２はタービン発電機の
回転軸に固着された正極および負極集電環、３は
集電環１，２と摺接して回転界磁巻線に励磁電流
を供給する複数個のブラシで、これらのブラシ３
はリード４を介してブスリング５に接続されてい
る。なお、これらの各部分１〜５を含む破線で囲
つた部分を総称してロツカー装置６と呼ぶことに
する。７はブスリングの周辺に近接して設置され
た火花ノイズと外部ノイズを電磁波信号として受
信する第１のアンテナ、８は第１のアンテナで受
信できる外部ノイズと同程度の外部ノイズのみを
受信するようにロツカー装置６の近傍か或いはロ
ツカー装置６全体を覆うカバーの周辺に設置され
た第２のアンテナ、９はコネクタ、１０は両アン
テナ７，８に受信された火花ノイズを検出処理
し、その波高値およびパルス幅が所定値以上のと
き火花発生有りと判定して検出信号を出力するア
ンテナ方式火花ノイズ検出器であり、１１は警報
器である。１２は交流電源、例えばタービン発電
機自身の交流出力で、整流用サイリスタ１３によ
り直流（脈動）に変換され、励磁用電源１４を介
してブスリング５に供給される。 The figure is an electrical circuit diagram showing a spark monitoring device for a current collector of a turbine generator according to an embodiment of the present invention. In this figure, 1 and 2 are positive and negative current collector rings fixed to the rotating shaft of the turbine generator, and 3 is a plurality of collector rings that are in sliding contact with the current collector rings 1 and 2 and supply exciting current to the rotating field winding. These brushes 3
is connected to bus ring 5 via lead 4. Note that the portion surrounded by broken lines including each of these portions 1 to 5 will be collectively referred to as the rocker device 6. 7 is a first antenna that is installed close to the bus ring and receives spark noise and external noise as electromagnetic wave signals; 8 is a antenna that receives only external noise of the same level as the external noise that can be received by the first antenna; A second antenna is installed near the rocker device 6 or around the cover that covers the entire rocker device 6, 9 is a connector, 10 is a connector that detects and processes the spark noise received by both antennas 7 and 8, and detects and processes the spark noise. This is an antenna-type spark noise detector that determines that a spark has occurred and outputs a detection signal when the high value and pulse width are greater than a predetermined value, and 11 is an alarm. 12 is an AC power source, for example, an AC output of the turbine generator itself, which is converted into DC (pulsation) by a rectifying thyristor 13 and supplied to the bus ring 5 via an excitation power source 14.
このように構成された火花監視装置において、
いま、集電環１，２とブラシ３との間に火花が発
生すると、第１のアンテナ７で火花ノイズを受信
するが、第２のアンテナ８では受信しない。この
ため、アンテナ方式火花ノイズ検出器１０で両ア
ンテナ７，８の検出信号の差をとると、第１のア
ンテナ７で受信された火花ノイズを検出信号とし
て得ることができる。また、火花ノイズのみでな
く外部ノイズも発生している場合には、第１のア
ンテナ７では火花ノイズと外部ノイズの双方を受
信し、第２のアンテナ８では外部ノイズのみを受
信する。このため、火花ノイズ検出器１０で両ア
ンテナの検出信号の差をとると、外部ノイズが除
去されて火花ノイズのみを検出信号として得るこ
とができる。そして、火花ノイズ検出器１０で
は、検出された火花ノイズ信号を設定値と比較
し、この設定値以上になつたとき、警報器１１に
警報信号を出力し、警報器１１を動作させて火花
の発生を知らせる。したがつて、外部ノイズによ
る誤つた判定を下すことがなく、信頼性の高い火
花監視を行なうことができる。 In the spark monitoring device configured in this way,
Now, when a spark occurs between the current collecting rings 1 and 2 and the brush 3, the first antenna 7 receives the spark noise, but the second antenna 8 does not receive it. Therefore, when the antenna type spark noise detector 10 takes the difference between the detection signals of both antennas 7 and 8, the spark noise received by the first antenna 7 can be obtained as the detection signal. Further, when not only spark noise but also external noise is generated, the first antenna 7 receives both the spark noise and the external noise, and the second antenna 8 receives only the external noise. Therefore, when the spark noise detector 10 detects the difference between the detection signals of both antennas, external noise is removed and only the spark noise can be obtained as a detection signal. Then, the spark noise detector 10 compares the detected spark noise signal with a set value, and when it exceeds the set value, outputs an alarm signal to the alarm 11 and activates the alarm 11 to detect sparks. Notify the outbreak. Therefore, highly reliable spark monitoring can be performed without making erroneous decisions due to external noise.
なお、前記実施例では、第２のアンテナ８をロ
ツカー装置６の外部に設けたが、火花ノイズを受
信しないようにシールドすればロツカー装置６の
内部に設けることもできる。 In the embodiment described above, the second antenna 8 is provided outside the rocker device 6, but it can also be provided inside the rocker device 6 as long as it is shielded so as not to receive spark noise.
また、第１および第２のアンテナ７，８も２ケ
所だけでなく、より多数設置してもよい。 Further, the first and second antennas 7 and 8 may be installed not only at two locations but also at a larger number.
さらに前記実施例では、タービン発電機の集電
装置に適用した場合について述べたが、その他の
回転電機の集電装置にも同様に適用することがで
きる。また、回転界磁巻線に対する励磁方式も、
回転電機自身の交流出力を整流して励磁電源とす
る前記実施例のものに限らず、回転電機とは別個
の直流電源を用いる方式など、その他の励磁方式
を採用してもよいことは言うまでもない。 Further, in the above embodiments, a case where the present invention is applied to a current collector of a turbine generator has been described, but the present invention can be similarly applied to a current collector of other rotating electric machines. In addition, the excitation method for the rotating field winding is
It goes without saying that the excitation method is not limited to the above embodiment in which the AC output of the rotating electric machine itself is rectified and used as the excitation power source, but other excitation methods such as a method using a DC power source separate from the rotating electric machine may be adopted. .
以上説明したように、本発明によれば、集電装
置で発生する火花ノイズ以外の外部ノイズによつ
て火花発生有りと誤つた判定を下すことがなくな
り、信頼性の高い火花監視を行なうことができ
る。
As explained above, according to the present invention, it is possible to prevent erroneous determination that a spark has occurred due to external noise other than the spark noise generated by the current collector, and to perform highly reliable spark monitoring. can.
第１図は本発明の一実施例に係る集電装置の火
花監視装置を示す電気回路図である。
１，２……集電環、３……ブラシ、５……ブス
リング、７……第１のアンテナ、８……第２のア
ンテナ、１０……アンテナ方式火花ノイズ検出
器。
FIG. 1 is an electrical circuit diagram showing a spark monitoring device for a current collector according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1, 2... Current collection ring, 3... Brush, 5... Bus ring, 7... First antenna, 8... Second antenna, 10... Antenna type spark noise detector.
Claims (1)
このブラシに励磁用電線を介して励磁電流を供給
する励磁電源とを備えたものにおいて、前記集電
環およびブラシの周辺に、火花ノイズと外部ノイ
ズを電磁波信号として受信する第１のアンテナ
と、この第１のアンテナで受信できる外部ノイズ
と同程度の外部ノイズを電磁波信号として受信す
る第２のアンテナを設け、これらの各アンテナで
受信された電磁波信号の差を火花ノイズとして検
出するようにしたことを特徴とする集電装置の火
花監視装置。1 a current collector ring, a brush that slides into contact with the current collector ring,
An excitation power source that supplies an excitation current to the brush via an excitation wire, and a first antenna that receives spark noise and external noise as electromagnetic wave signals around the current collection ring and the brush; A second antenna is provided that receives external noise of the same magnitude as the external noise that can be received by this first antenna as an electromagnetic wave signal, and the difference between the electromagnetic wave signals received by each of these antennas is detected as spark noise. A spark monitoring device for a current collector, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60254827A JPS62118731A (en) | 1985-11-15 | 1985-11-15 | Current collector spark monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60254827A JPS62118731A (en) | 1985-11-15 | 1985-11-15 | Current collector spark monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62118731A JPS62118731A (en) | 1987-05-30 |
| JPH0449341B2 true JPH0449341B2 (en) | 1992-08-11 |
Family
ID=17270412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60254827A Granted JPS62118731A (en) | 1985-11-15 | 1985-11-15 | Current collector spark monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62118731A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02123946A (en) * | 1988-09-28 | 1990-05-11 | Westinghouse Electric Corp <We> | Method and device for detecting arc in stator of rotating electric machine |
-
1985
- 1985-11-15 JP JP60254827A patent/JPS62118731A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62118731A (en) | 1987-05-30 |
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