JPS59149793A - Malfunction detector - Google Patents
Malfunction detectorInfo
- Publication number
- JPS59149793A JPS59149793A JP58023292A JP2329283A JPS59149793A JP S59149793 A JPS59149793 A JP S59149793A JP 58023292 A JP58023292 A JP 58023292A JP 2329283 A JP2329283 A JP 2329283A JP S59149793 A JPS59149793 A JP S59149793A
- Authority
- JP
- Japan
- Prior art keywords
- current
- phase
- phase induction
- currents
- zero
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は１台の制御装置により、複数台の三相誘導電動
機を同時制御して複数台の被駆動装置を同時駆動する設
備における、三相誘導電動機と被駆動装置を連結するカ
ップリングの破断または被駆動装置の異常を検出する装
置に関する。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to three-phase The present invention relates to a device for detecting a breakage of a coupling connecting an induction motor and a driven device or an abnormality in the driven device.
従来、例えば熱間圧延設備（ホラトス） ＩＪツブミル
）においては、１台の制御装置で複数台の三相誘導電動
機を同時制御して、この三相誘導電動機にカップリング
により連結された被駆動装置としてのロールを同時駆動
し、圧延材料を円滑に搬送することが行なわれている。Conventionally, for example, in a hot rolling facility (Horatos IJ mill), a single control device controls multiple three-phase induction motors simultaneously, and a driven device is connected to the three-phase induction motor through a coupling. Rolls are simultaneously driven to smoothly convey the rolled material.
ところで、この種の設備において例えばカップリングの
破断、被駆動装置の異常等が発生すると、ロールの運転
が停止することにより圧延材料の搬送を円滑に行なうこ
とができず、製品に傷をつけたりする等の不具合が発生
する。しかしながら、従来ではカッシリングの破断、被
駆動装置の異常を検出する有効な手段をとっていないた
め、設備全体にかかわる不具合が生じて初めてその旨の
異常を発見するという場合が殆んどであｐ、その解決策
が熱望されてきている。By the way, if, for example, a coupling breaks or an abnormality occurs in a driven device in this type of equipment, the rolls will stop operating, making it impossible to smoothly convey the rolled material, which may cause damage to the product. Other problems may occur. However, in the past, no effective means have been taken to detect broken cassilling rings or abnormalities in driven equipment, so in most cases, such abnormalities are discovered only after a malfunction involving the entire equipment occurs. , a solution to this problem has been eagerly awaited.
本発明は上記のような事情に鑑みて成されたもので、そ
の目的はカップリングの破断或いは被駆動装置の異常を
電気的に確実に且つ迅速に検出して設備の不具合を未然
に防止することが可能な異常検出装置を提供することに
ある。The present invention has been made in view of the above-mentioned circumstances, and its purpose is to electrically and reliably and quickly detect coupling rupture or abnormality in driven equipment to prevent equipment malfunctions. The object of the present invention is to provide an abnormality detection device capable of detecting abnormalities.
上記目的を達成するために本発明では、１台の制御装置
によシｎ台（ｎは３以上の整数）の三相誘導電動機を同
時制御し、該三相誘導電動機とカップリングにて連結さ
れた１台の被駆動装置を同時駆動する設備において、前
記三相誘導電動機を３台毎に組分は構成し、前記各組に
おける夫々の三相誘導電動機の互いに異なる相の電流を
抽出する手段と、この抽出された電流を基に零相分電流
を検出する手段とを備えて、カンプリングの破断、被駆
動装置の異常を検出するようにしたことを特徴とする。In order to achieve the above object, the present invention simultaneously controls n three-phase induction motors (n is an integer of 3 or more) using one control device, and connects them to the three-phase induction motors through a coupling. In the equipment for simultaneously driving one driven device, the three-phase induction motors are divided into three groups, and currents of different phases of the three-phase induction motors in each group are extracted. and a means for detecting a zero-sequence current based on the extracted current, thereby detecting breakage of the compression ring or abnormality of the driven device.
以下、本発明を図面に示す一実施例について説明する。 An embodiment of the present invention shown in the drawings will be described below.
第１図は、本発明を適用する設備（本例ではホットスト
ｖツブミル）の概要構成を示すものである。図において
、１１．・・・、Ｉｎは被駆動装置としてのｎ台（ｎ）
３ ）のロールで、カップリング２ノ、・・・、２ｎに
よりｎ台の三相誘導電動機３１．・・・、３ｎに連結し
、図示しない制御装置により三相誘導電動機３１．・・
・、３ｎを同時制御して、負荷１１．・・・、Ｉｎを同
時駆動するようにしている。FIG. 1 shows a schematic configuration of equipment to which the present invention is applied (in this example, a hot stave mill). In the figure, 11. ..., In is n units (n) as driven devices
3), n three-phase induction motors 31. ..., 3n, and a three-phase induction motor 31.・・・
, 3n are simultaneously controlled, and the load 11. . . , In are driven simultaneously.
第２図は、本発明による異常検出装置の構成例を示すも
のであり、図において第１図と同一部分には同一符号を
付して示している。図において、ｎ台の三相誘導電動機
３１．・・・＋Ｊｎを３台毎に組分は構成し、各組忙お
ける夫々の誘導電動機３１．・・・、３ｎの互いに異な
る相の電流を変流器５１．・・・ｒ５ｎにょシ抽出し、
且つその３つの変流器５１〜５３１５４〜５６゜５ｎ−
２，・・・５ｎの出力側を星形に接続して残留回路を構
成し、電流検出リレー６ノ、・・・、６ｍ（ｍ＝ｎ／３
’）によシ零相分電流を検出するようにしている。なお
、４は三相誘導電動機３１．・・・。FIG. 2 shows an example of the configuration of an abnormality detection device according to the present invention, and in the figure, the same parts as in FIG. 1 are denoted by the same reference numerals. In the figure, n three-phase induction motors 31. ...+Jn are divided into groups of three units, and each induction motor 31. . . , 3n of mutually different phase currents are transferred to current transformers 51 . ...r5n nyoshi extraction,
And the three current transformers 51~53154~56°5n-
Connect the output sides of 2,...5n in a star shape to form a residual circuit, and connect the current detection relays 6,..., 6m (m=n/3
') to detect the zero-sequence current. Note that 4 is a three-phase induction motor 31. ....
３ｎを一括駆動する制御装置である。ここで、変流器５
１，５２．５３は例えば三相誘導電動機３１，３２．３
３に対し、夫々類にＵ相、■相、Ｗ相というように互い
に異なる相に設けている。This is a control device that collectively drives 3n. Here, current transformer 5
1, 52.53 is, for example, a three-phase induction motor 31, 32.3
3, they are provided in different phases such as U phase, ■ phase, and W phase for each category.
かかる構成において、三相誘導電動機３１〜３ｎが制御
装置４により運転されている場合、被駆動装置１１．・
・・、Ｉｎの負荷が正常で且つカップリング２１．・・
・＋ ２ ｎが正常であれば、各三相誘導電動機３１．
・・・、３°ｎに加わる負荷の大きさが等しいものとす
ると、各三相誘導電動機−
動機３１．・・・ｒ３ｎに加わる負荷の大きさが等しい
ものとすると、各三相誘導電動機３１．・・・。In this configuration, when the three-phase induction motors 31 to 3n are operated by the control device 4, the driven devices 11.・
. . , the load on In is normal and the coupling 21.・・・
・If +2n is normal, each three-phase induction motor 31.
..., 3°n, each three-phase induction motor-motor 31. ...assuming that the magnitude of the load applied to r3n is equal, each three-phase induction motor 31. ....
３ｎに流れる電流も等しくなる。このとき、電流検出リ
レー６ノ、・・・ｒ６ｍＫ流れる電流を考えてみる。−
例として、電流検出リレー６１に着目してみる。即ち、
三相誘導電動機３１〜３３に流れる電流は、変流器５１
〜５３によって検出されるが、夫々の三相誘導電動機の
互いに異なる相電流を検出しているため、また変流器５
１〜５３の出力側が星形に結線されているため、星形結
線後の出力端即ち電流検出リレー６１の入力端では、合
成電流が零となり電流検出リレー６１は動作しない。こ
れは、一般に知られている配電線の零相電流検出方式を
考えれば明らかである。The current flowing through 3n also becomes equal. At this time, consider the current flowing through the current detection relays 6, . . . r6mK. −
As an example, let's focus on the current detection relay 61. That is,
The current flowing through the three-phase induction motors 31 to 33 is passed through a current transformer 51.
53, but since different phase currents of the respective three-phase induction motors are detected, and the current transformer 5
Since the output sides of Nos. 1 to 53 are connected in a star shape, the combined current becomes zero at the output end after the star connection, that is, at the input end of the current detection relay 61, and the current detection relay 61 does not operate. This becomes clear when considering the generally known zero-sequence current detection method for power distribution lines.
一方、三相誘導電動機３１．・・・、３ｎと被駆動装置
１１．・・・、Ｉｎを連結するカップリング２１、・・
・＋ ２ ｎのうちのいずれか１台でも破断若しくは被
駆動装置１１．・・・＋１ｎ自体の異常等によシ、三相
誘導電動機３１．・・・、３ｎに加６−
わる負荷の大きさにアンバランスが生じると、’ＷＬ流
検量検出リレー６１．・、６ｎのいずれかに電流が流れ
て当該リレーが動作することにより、前述した異常を検
出することができる。On the other hand, the three-phase induction motor 31. . . , 3n and the driven device 11. ..., coupling 21 connecting In, ...
・+2n If any one of them breaks or the driven device 11. ...Due to abnormality of +1n itself, three-phase induction motor 31. . . , 6- If an imbalance occurs in the magnitude of the load applied to 3n, 'WL flow measurement detection relay 61. The above-mentioned abnormality can be detected by causing a current to flow through either of the relays . and 6n and operating the relay.
同、上記実施例では３台の変流器５１〜５３の出力側を
星形に接続して零相分電流を検出することにより、カッ
プリング２１〜２３および被駆動装置１１〜１３の異常
を検出したが、これに限らず例えば第３図に示す如く、
変流器５ノ、・・・、５ｎに代えて零相変流器７１．・
・・。Similarly, in the above embodiment, by connecting the output sides of the three current transformers 51 to 53 in a star shape and detecting the zero-sequence current, abnormalities in the couplings 21 to 23 and the driven devices 11 to 13 are detected. However, the detection is not limited to this, for example, as shown in Fig. 3,
Zero-phase current transformers 71 .・
....
７ｍを用い、例えば三相誘導電動機３１〜３３の互いに
異なる相電流を零相変流器７１に導き、零相分電流を検
出するようにしてもよいものである。7m may be used to guide mutually different phase currents of the three-phase induction motors 31 to 33 to the zero-phase current transformer 71, and detect the zero-phase current.
以上説明したように本発明によれば、三相誘導電動機を
３台毎に粗分は構成し、各組における三相誘導電動機の
互いに異なる相の電流を抽出しその零相分電流を検出す
るようにしたので、カップリングの破断或いは被駆動装
置の異常を電気的に確実に且つ迅速に検出して設備の不
具合を未然に防止することが可能な信頼性の高い異常検
出装置が提供できる。As explained above, according to the present invention, three-phase induction motors are configured for each three-phase induction motor, and the currents of different phases of the three-phase induction motors in each set are extracted and the zero-phase current is detected. Thus, it is possible to provide a highly reliable abnormality detection device that can electrically and reliably and quickly detect a rupture of a coupling or an abnormality in a driven device, thereby preventing equipment malfunctions.
第１図は本発明を適用する設備の構成例を示す図、第２
図および第３図は本発明の一実施例および他の実施例を
夫々示す構成図である。
１１、・・・、７ｎ・・・被駆動装置、２１．・・・、
２ｎ・・・カップリング、３１．・・・、Ｊｎ・・・三
相誘導電動機、４・・・制御装置、５１．・・・、５ｎ
・・・変流器、６１、・・・、６ｍ・・・電流検出リレ
ー、７１．・・・。
７ｍ・・・零相変流器。Figure 1 is a diagram showing an example of the configuration of equipment to which the present invention is applied;
3 and 3 are configuration diagrams showing one embodiment and another embodiment of the present invention, respectively. 11,..., 7n... Driven device, 21. ...,
2n...coupling, 31. ..., Jn... Three-phase induction motor, 4... Control device, 51. ..., 5n
...Current transformer, 61, ..., 6m...Current detection relay, 71. .... 7m...Zero phase current transformer.
Claims (3)
の三相誘導電動機を同時制御し、該三相誘導電動機とカ
ップリングにて連結されたｎ台の被駆動装置を同時駆動
する設備において、前記三相誘導電動機を３台毎に粗分
は構成し、前記各組における夫々の三相誘導電動機の互
いに異なる相の電流を抽出する手段と、この抽出された
電流を基に零相分電流を検出する手段とを具備したこと
を特徴とする異常検出装置。(1) One control device controls n units (n is an integer of 3 or more)
In a facility that simultaneously controls a three-phase induction motor and simultaneously drives n driven devices connected to the three-phase induction motor through a coupling, the three-phase induction motor is roughly divided into three units. and an abnormality characterized by comprising means for extracting currents of different phases of the respective three-phase induction motors in each set, and means for detecting a zero-phase current based on the extracted currents. Detection device.
変流器で抽出し、これらの各出力を星形に接続して零相
分電流を検出するようにした特許請求の範囲第（１）項
記載の異常検出装置。(2) The current of different phases of each set of three-phase induction motors is extracted by a current transformer, and each of these outputs is connected in a star shape to detect a zero-phase current. The abnormality detection device described in (1).
流を零相変流器に導き零相分電流を検出するようにした
特許請求の範囲第（１）項記載の異常検出装置。(3) The abnormality detection device according to claim (1), wherein currents of different phases of each set of three-phase induction motors are guided to a zero-phase current transformer to detect a zero-phase current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58023292A JPS59149793A (en) | 1983-02-15 | 1983-02-15 | Malfunction detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58023292A JPS59149793A (en) | 1983-02-15 | 1983-02-15 | Malfunction detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59149793A true JPS59149793A (en) | 1984-08-27 |
Family
ID=12106527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58023292A Pending JPS59149793A (en) | 1983-02-15 | 1983-02-15 | Malfunction detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59149793A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6159513A (en) * | 1984-08-30 | 1986-03-27 | Mitsubishi Electric Corp | Vibration controller |
| JPH042718U (en) * | 1990-04-20 | 1992-01-10 | ||
| EP0731544A2 (en) * | 1995-03-07 | 1996-09-11 | Licentia Patent-Verwaltungs-GmbH | Method and device for monitoring at least two parallel operating motors |
| JP5205267B2 (en) * | 2006-08-02 | 2013-06-05 | Ｔｈｋ株式会社 | Power branch system and power branch method |
-
1983
- 1983-02-15 JP JP58023292A patent/JPS59149793A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6159513A (en) * | 1984-08-30 | 1986-03-27 | Mitsubishi Electric Corp | Vibration controller |
| JPH042718U (en) * | 1990-04-20 | 1992-01-10 | ||
| EP0731544A2 (en) * | 1995-03-07 | 1996-09-11 | Licentia Patent-Verwaltungs-GmbH | Method and device for monitoring at least two parallel operating motors |
| EP0731544A3 (en) * | 1995-03-07 | 1997-01-15 | Licentia Gmbh | Method and device for monitoring at least two parallel operating motors |
| JP5205267B2 (en) * | 2006-08-02 | 2013-06-05 | Ｔｈｋ株式会社 | Power branch system and power branch method |
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