JPH05304745A - Stator iron core abnormality detector - Google Patents

Stator iron core abnormality detector

Info

Publication number
JPH05304745A
JPH05304745A JP10731292A JP10731292A JPH05304745A JP H05304745 A JPH05304745 A JP H05304745A JP 10731292 A JP10731292 A JP 10731292A JP 10731292 A JP10731292 A JP 10731292A JP H05304745 A JPH05304745 A JP H05304745A
Authority
JP
Japan
Prior art keywords
iron core
magnetic flux
voltage
core
stator
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
Application number
JP10731292A
Other languages
Japanese (ja)
Other versions
JP3270105B2 (en
Inventor
Hideaki Tsuda
秀明 津田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP10731292A priority Critical patent/JP3270105B2/en
Publication of JPH05304745A publication Critical patent/JPH05304745A/en
Application granted granted Critical
Publication of JP3270105B2 publication Critical patent/JP3270105B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

PURPOSE:To provide a stator iron core abnormality detector which can detect the abnormality of the iron core of a stator in operation at an early stage, and detect the position of abnormality in axial direction. CONSTITUTION:Magnetic flux detecting coils 4, which surround a plurality of iron core blocks 2a, 2b, 2c, and 2d divided by ventilation ducts 3, are arranged, and they are wired so that the voltages induced in each magnetic flux detecting coil 4 may be subtracted when they are composed. Moreover, it is equipped with an alarm 7 which issues an alarm when the composite voltage of each magnetic flux detecting coil 4 gets over a certain set range.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は回転電機の固定子鉄心異
常検出装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core abnormality detecting device for a rotating electric machine.

【0002】[0002]

【従来の技術】回転電機の固定子鉄心(1)は図5に示
すように、ワニスを表面に焼き付けることによる絶縁被
膜を有する抜板(12)を積層して成り、軸方向のある間
隔ごとに冷却用の通風ダクト(図示せず)を有し、また
固定子コイル(図示せず)を納める固定子スロット
(6)を有している。抜板(12)の外径部にダブテール
状のキー溝(13)があり、これをキーバー(8)にはめ
込むことにより鉄心(1)の固定がなされる。
2. Description of the Related Art As shown in FIG. 5, a stator core (1) of a rotating electric machine is formed by laminating blanks (12) having an insulating coating formed by baking a varnish on the surface, and at certain intervals in the axial direction. Has a ventilation duct (not shown) for cooling, and also has a stator slot (6) for accommodating a stator coil (not shown). There is a dovetail-shaped key groove (13) on the outer diameter portion of the blank (12), and the iron core (1) is fixed by fitting this into the key bar (8).

【0003】抜板表面には絶縁被膜があるが、キーバー
(8)へのはめ込み時、または積層途中の鉄心締め付け
作業等により、抜板のキー溝部(13)では絶縁被膜がは
がれる。このため、各抜板(12)の外径側はキーバーに
より短絡された状態となっており、これは鉄心組立て上
避けることのできない抜板の短絡であり、これを第1の
短絡(9)とする。
Although there is an insulating coating on the surface of the punched plate, the insulating coating is peeled off in the key groove portion (13) of the punched plate due to the work such as fitting into the key bar (8) or tightening of the iron core during stacking. Therefore, the outer diameter side of each punched plate (12) is short-circuited by the key bar, which is an unavoidable short circuit of the punched plate in the iron core assembly, and this is the first short circuit (9). And

【0004】固定子コイルに電圧を発生するため固定子
鉄心内では同図に示すように円周方向に交番する磁束Φ
が流れる。これにより各抜板間には電圧が誘起される
が、鉄心外径部の第1の短絡(9)以外では抜板が短絡
していない状態では抜板間を循環する短絡電流は流れ
ず、これが鉄心の正常な状態である。しかし何らかの原
因で、例えば鉄心内周面が傷付けられ第2の短絡(10)
が形成されると抜板間に循環電流が流れる短絡回路(1
4)が形成される。
Since a voltage is generated in the stator coil, magnetic flux Φ alternating in the circumferential direction in the stator core as shown in FIG.
Flows. As a result, a voltage is induced between the blanks, but a short circuit current circulating between the blanks does not flow in a state where the blanks are not short-circuited except for the first short circuit (9) of the iron core outer diameter portion, This is the normal state of the iron core. However, for some reason, for example, the inner peripheral surface of the iron core is damaged and the second short circuit (10) occurs.
If a short circuit (1
4) is formed.

【0005】この短絡回路(14)を流れる循環電流によ
り、第2の短絡箇所(10)の接触抵抗でそこに発生する
ジュール熱や放電によるアーク熱によって、鉄心の損傷
がさらに拡大し鉄心の溶損や固定子コイルの絶縁の損傷
を引き起こし、大事故に至る可能性がある。
The circulating current flowing through the short-circuit (14) further increases the damage of the iron core due to the Joule heat generated at the contact resistance of the second short-circuited portion (10) and the arc heat due to the discharge, which further expands the damage of the iron core. Loss or damage to the stator coil insulation can lead to a major accident.

【0006】従来、このような鉄心抜板間の短絡を運転
中に監視する方法として、過熱されることにより冷却ガ
ス中に浮遊する物質を鉄心に塗布し、この物質を検出す
ることにより鉄心に異常過熱があることを検知する、い
わゆるコアモニタという技術がある。
[0006] Conventionally, as a method for monitoring such a short circuit between the core punched plates during operation, a substance floating in the cooling gas due to overheating is applied to the iron core, and the substance is detected to detect the iron core. There is a so-called core monitor technology that detects the presence of abnormal overheating.

【0007】[0007]

【発明が解決しようとする課題】ところで、この従来技
術は鉄心全体を監視できる利点はあるが、単に鉄心の過
熱が検知されるだけで、鉄心自体に異常があるのかまた
は鉄心に接する固定子コイルが過熱しているのか、また
鉄心の軸方向のどの位置で過熱しているのか判別できな
いので、回転電機の運転を停止して内部の点検を行うと
きに、過熱位置の特定が困難なことがある。また、抜板
間短絡の初期や、第2の短絡部の接触抵抗が小さい場合
には発生熱が少なく、コアモニタで検知されるほどの過
熱に至らない場合の鉄心異常を検出することは困難であ
る。
By the way, although this prior art has the advantage of being able to monitor the entire iron core, there is an abnormality in the iron core itself or a stator coil contacting the iron core only by detecting overheating of the iron core. It is difficult to identify the overheated position when stopping the operation of the rotating electrical machine and inspecting the inside because it is not possible to determine whether it is overheating or at which position in the axial direction of the iron core it is overheating. is there. Further, in the initial stage of the short circuit between blanks or when the contact resistance of the second short-circuited portion is small, the generated heat is small, and it is difficult to detect the iron core abnormality when the overheat does not reach the level detected by the core monitor. is there.

【0008】そこで、本発明は上記の従来技術の欠点に
鑑みなされたもので、運転中の固定子鉄心の異常を感度
よく早期に検出し、また軸方向の異常位置を検知できる
固定子鉄心異常検出装置を提供することを目的とする。
Therefore, the present invention has been made in view of the above-mentioned drawbacks of the prior art, and is capable of detecting abnormalities in the stator core during operation with good sensitivity and early, and abnormal stator cores that can detect abnormal axial positions. An object is to provide a detection device.

【0009】[0009]

【課題を解決するための手段】上記目的を達成するため
に、本発明は通風ダクトで分割される複数個の鉄心ブロ
ックを囲む磁束検出コイルを配置し、各磁束検出コイル
に誘起された電圧が合成されると互いに差し引きされる
ように結線し、各磁束検出コイルの合成電圧の変化分が
設定値を越えると警報を出力する警報装置を備えた構成
とする。また、異常が検知されたとき軸方向のどの鉄心
ブロックに異常があるかを検知する異常部位判定手段を
備えた構成とする。
In order to achieve the above object, the present invention arranges a magnetic flux detecting coil surrounding a plurality of iron core blocks divided by a ventilation duct, and the voltage induced in each magnetic flux detecting coil is When combined, the wires are connected so as to be subtracted from each other, and an alarm device is provided to output an alarm when the change in the combined voltage of the magnetic flux detection coils exceeds a set value. In addition, it is configured to include an abnormal portion determination unit that detects which axial core block has an abnormality when the abnormality is detected.

【0010】[0010]

【作用】以上のような構成により、固定子鉄心が正常時
には鉄心に流れる磁束は各部で一様に流れ、鉄心ブロッ
クに巻かれた各磁束検出コイルの電圧は一定であり、合
成電圧は各鉄心ブロック間で互いに差し引きされ低い値
である。もしある鉄心ブロックの鉄心抜板間で第2の短
絡が起こると、抜板間に短絡電流が流れその反作用起磁
力でこの鉄心ブロックに流れる磁束Φが減少する。これ
により、この鉄心ブロックに巻かれた磁束検出コイルの
電圧は減少し、各磁束検出コイルの合成電圧は変化す
る。合成電圧は各鉄心ブロック間で互いに差し引きされ
もともと低い値であるので、抜板間に第2の短絡が起こ
り、磁束分布にこのような不平衡があると敏感に変化す
る。従って、この合成電圧を監視することにより固定子
鉄心の異常を検知することができる。
With the above-mentioned structure, when the stator core is normal, the magnetic flux flowing in the core flows uniformly in each part, the voltage of each magnetic flux detection coil wound around the core block is constant, and the combined voltage is the total core voltage. It is a low value because the blocks are deducted from each other. If a second short circuit occurs between the core blanks of a certain core block, a short circuit current flows between the core blanks and the reaction magnetomotive force reduces the magnetic flux Φ flowing in this core block. As a result, the voltage of the magnetic flux detection coil wound around the iron core block decreases and the combined voltage of the magnetic flux detection coils changes. Since the composite voltage is originally a low value after being subtracted from each other between the iron core blocks, a second short circuit occurs between the blanks, and the magnetic flux distribution is sensitively changed when such an imbalance occurs. Therefore, by monitoring this combined voltage, it is possible to detect an abnormality in the stator core.

【0011】[0011]

【実施例】以下に図面を参照して本発明の一実施例につ
いて説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0012】図1は固定子鉄心(1)が4つの鉄心ブロ
ック(2a)、(2b)、(2c)、(2d)から成る
例を示すもので、キーバー(8)に固定され、各鉄心ブ
ロック間には通風ダクト(3)を備えている。磁束検出
コイル(4)は、通風ダクト(3)を通り、固定子コイ
ル(5)が納められる固定子スロット(6)の底を通る
ように、各鉄心ブロックにそれぞれ巻かれて機外に端子
が引き出される。各磁束検出コイル(4)は合成される
と互いに差し引かれるように交互に極性を逆にして結線
される。また、合成された電圧Vがある設定範囲を越え
ると警報を発する警報装置を備える。
FIG. 1 shows an example in which a stator core (1) is composed of four core blocks (2a), (2b), (2c), (2d), which are fixed to a key bar (8) and each core is fixed. A ventilation duct (3) is provided between the blocks. The magnetic flux detection coil (4) is wound around each core block so as to pass through the ventilation duct (3) and pass through the bottom of the stator slot (6) in which the stator coil (5) is housed, and the terminal is provided outside the machine. Is withdrawn. The magnetic flux detection coils (4) are connected with their polarities reversed so that they are subtracted from each other when combined. Further, an alarm device is provided for issuing an alarm when the combined voltage V exceeds a certain setting range.

【0013】以上のような構成により、次のような原理
で固定子鉄心の異常が検知される。すなわち、図2に示
すように、固定子鉄心(1)が正常な時には磁束は各鉄
心ブロック(2a)、(2b)、(2c)、(2d)に
一様に流れる。各鉄心ブロックには、積み厚が全て同じ
とした構成の場合、同じ磁束量Φが流れ、各磁束検出コ
イルの誘起電圧の大きさは同じV1 となり次の値とな
る。 Va=V1 ,Vb=−V1 ,Vc=V1 ,Vd=−V1 従って合成された電圧Vは、 V=Va+Vb+Vc+Vd=V1 −V1 +V1 −V1 =0 となる。実際には組立上の誤差から、必ずしも0になる
とは限らないが、ブロック1個の電圧V1 に比べれば非
常に小さく、実質的に0とみなすことができる。このよ
うに固定子鉄心(1)が正常な場合には合成電圧の値は
0となる。一方、何らかの原因で鉄心ブロック(2d)
の内周面で、抜板間に第2の短絡(10)が生じた場合の
各磁束検出コイルの電圧を図3に示す。
With the above configuration, the abnormality of the stator core is detected on the basis of the following principle. That is, as shown in FIG. 2, when the stator core (1) is normal, the magnetic flux flows uniformly through each core block (2a), (2b), (2c), (2d). In the case where the iron core blocks have the same stacking thickness, the same magnetic flux amount Φ flows, and the magnitude of the induced voltage of each magnetic flux detection coil is the same V 1 and has the following value. Va = V 1 , Vb = −V 1 , Vc = V 1 , Vd = −V 1 Therefore, the combined voltage V is V = Va + Vb + Vc + Vd = V 1 −V 1 + V 1 −V 1 = 0. In practice, it does not always become 0 due to an assembly error, but it is much smaller than the voltage V 1 of one block and can be regarded as substantially 0. Thus, when the stator core (1) is normal, the value of the combined voltage is 0. On the other hand, for some reason, the iron core block (2d)
FIG. 3 shows the voltage of each magnetic flux detection coil when the second short circuit (10) occurs between the blanks on the inner peripheral surface of the.

【0014】ここで、健全な鉄心ブロック(2a)、
(2b)、(2c)の各磁束量は、鉄心ブロック(2
d)での第2の短絡(10)の有無にかかわらず一定のΦ
とし、また第2の短絡(10)は鉄心ブロック(2d)の
全積み厚に渡るものとする。
Here, the sound iron core block (2a),
The magnetic flux amounts of (2b) and (2c) are the same as those of the iron core block (2
constant Φ with or without the second short circuit (10) in d)
The second short-circuit (10) extends over the entire thickness of the iron core block (2d).

【0015】このような場合、鉄心ブロック(2d)内
には短絡電流(11)が流れ、その反作用起磁力は短絡前
に流れていた磁束Φを打ち消すように働き、各磁束検出
コイルの電圧は次の値となる。 Va=V1 ,Vb=−V1 ,Vc=V1 ,Vd=0 従って合成された電圧Vは、 V=Va+Vb+Vc+Vd=V1 −V1 +V1 +0=V1 となる。
In such a case, a short-circuit current (11) flows in the iron core block (2d), the reaction magnetomotive force acts to cancel the magnetic flux Φ flowing before the short circuit, and the voltage of each magnetic flux detection coil is It has the following value. Va = V 1 , Vb = −V 1 , Vc = V 1 , Vd = 0 Therefore, the combined voltage V is V = Va + Vb + Vc + Vd = V 1 −V 1 + V 1 + 0 = V 1 .

【0016】このように、合成電圧は鉄心ブロック間で
互いに差し引きされてもともと低い値なので、ある鉄心
ブロックで第2の短絡が起こると、合成電圧は相対的に
大きく変化する。
As described above, since the combined voltage is a low value even after being subtracted from each other between the iron core blocks, when the second short circuit occurs in a certain iron core block, the combined voltage changes relatively greatly.

【0017】以上説明したように、第2の短絡(10)が
ないかまたはその程度が微小なものから、鉄心の1ブロ
ック全体へと進展するにつれ合成電圧は0からV1 へと
大きくなっていく。変化率でみれば、もともと合成電圧
は低い値であり、異常のある鉄心ブロックの磁束検出コ
イルの電圧の変化率そのものが合成電圧に100 %現れ感
度が高い。
As described above, the composite voltage increases from 0 to V 1 as the second short circuit (10) is not present or the degree thereof is very small, and it progresses to the entire one block of the iron core. Go In terms of the rate of change, the composite voltage is originally a low value, and the rate of change of the voltage of the magnetic flux detection coil of the abnormal iron core block itself appears at 100% in the composite voltage and the sensitivity is high.

【0018】これと対照的に、仮に全ての四つの鉄心ブ
ロックをまとめて囲む一つの磁束検出コイルを設けた場
合には、一つのブロック分の誘起電圧V1 が0になった
時、磁束検出コイルの合成電圧は4×V1 から3×V1
へと変化するが、変化率は25%と小さい。大形の回転電
機になれば、例えばタービン発電機の場合には、鉄心ブ
ロック数は100 程度あるため、一つのブロック分の誘起
電圧V1 が0になっても磁束検出コイルの合成電圧の変
化率は1%程度と小さく感度は悪い。また、一つのブロ
ック分の誘起電圧V1 は通常10V程度であるが、100 ブ
ロック分では1000V程度と高電圧となるため、磁束検出
コイルは大きな絶縁耐力を有するものが必要となり、そ
のような磁束検出コイルを鉄心に巻くことは困難である
とともに、万一これが絶縁破壊すれば大きな事故を引き
起こし信頼性に劣る。また計測装置も特別なものが必要
で高価となる。
In contrast to this, if one magnetic flux detecting coil surrounding all four iron core blocks is provided, the magnetic flux is detected when the induced voltage V 1 for one block becomes 0. The combined voltage of the coil is from 4 × V 1 to 3 × V 1
However, the rate of change is small at 25%. In the case of a large rotating electric machine, for example, in the case of a turbine generator, since the number of iron core blocks is about 100, even if the induced voltage V 1 for one block becomes 0, the change in the combined voltage of the magnetic flux detection coils will change. The rate is small at about 1% and the sensitivity is poor. In addition, the induced voltage V 1 for one block is usually about 10 V, but for 100 blocks it becomes a high voltage of about 1000 V, so a magnetic flux detection coil with a large dielectric strength is required. It is difficult to wind the detection coil around the iron core, and if it breaks down the insulation, a serious accident will occur and the reliability will be poor. Also, a special measuring device is required, which is expensive.

【0019】これにひきかえ、本発明の場合、各磁束検
出コイルの合成電圧は高くてもV1程度であり、大きな
絶縁耐力を必要としないので磁束検出コイルを鉄心に巻
くことは容易であり、特別な計測装置は不要である。
In contrast to this, in the case of the present invention, the combined voltage of each magnetic flux detecting coil is about V 1 at the highest, and since a large dielectric strength is not required, it is easy to wind the magnetic flux detecting coil on the iron core. No special measuring device is required.

【0020】また検出感度が高いので、第2の短絡の程
度が微小なうちに早期に検知できる。さらに、各磁束検
出コイルの合成電圧を監視し、それが設定値を越えると
警報を出力する警報装置(7)を備えることにより、固
定子鉄心の異常を検知することが容易となる。このよう
に異常が検知されると、次に各磁束検出コイルの電圧を
測定することにより、軸方向のどの鉄心ブロックに異常
があるか検知できるので異常部位の点検が容易となる。
本実施例では、一つの鉄心ブロックごとに一つの磁束検
出コイルを巻いたが、適当な複数個の鉄心ブロックをま
とめて一つの磁束検出コイルを巻いてもよい。
Further, since the detection sensitivity is high, it is possible to detect the second short circuit early while the degree of the second short circuit is minute. Furthermore, by providing an alarm device (7) that monitors the combined voltage of each magnetic flux detection coil and outputs an alarm when it exceeds a set value, it becomes easy to detect an abnormality in the stator core. When an abnormality is detected in this way, it is possible to detect which iron core block in the axial direction has an abnormality by measuring the voltage of each magnetic flux detection coil next, so that the inspection of the abnormal portion becomes easy.
In this embodiment, one magnetic flux detection coil is wound for each iron core block, but one magnetic flux detection coil may be wound by collectively collecting a plurality of suitable iron core blocks.

【0021】図4は本発明の他の実施例で、鉄心ブロッ
ク数が奇数の5個であり、また各鉄心ブロックの積み厚
が一部異なっている場合の磁束検出コイルの巻き方を示
す。つまり通常鉄心の構造は、軸方向の中心線に対して
対称とするので、対称の位置にある一対の鉄心ブロック
に巻かれた磁束検出コイルの極性を逆に接続した例であ
る。この場合、鉄心が正常な時の各磁束検出コイルの電
圧を、 Va=−Ve=V1 ,Vc=−Vb=Vd=V2 とすると、合成電圧Vは、 V=Va+Vb+Vc+Vd+Ve=V2 となる。ここで鉄心ブロック(2c)の全積み厚に渡っ
て短絡が起こると、Vc=0となり、合成電圧VはV=
2 からV=0へと変化する。これ以降の作用、効果に
ついては、前述の実施例と同様である。
FIG. 4 shows another embodiment of the present invention, in which the magnetic flux detecting coil is wound when the number of iron core blocks is an odd number of 5, and the thickness of each iron core block is partially different. That is, since the structure of the ordinary iron core is symmetrical with respect to the axial center line, this is an example in which the polarities of the magnetic flux detection coils wound around the pair of iron core blocks at symmetrical positions are reversed. In this case, when the voltage of each magnetic flux detection coil when the iron core is normal is Va = -Ve = V 1 and Vc = -Vb = Vd = V 2 , the combined voltage V is V = Va + Vb + Vc + Vd + Ve = V 2. .. If a short circuit occurs over the entire stack thickness of the iron core block (2c), Vc = 0 and the combined voltage V becomes V =
It changes from V 2 to V = 0. Subsequent operations and effects are similar to those of the above-described embodiment.

【0022】[0022]

【発明の効果】以上説明したように、本発明によれば、
運転中の固定子鉄心の異常を感度良く早期に検出し、ま
た軸方向の異常の位置を検知することができる。信頼性
の高い固定子鉄心異常検出装置を提供することが可能と
なった。
As described above, according to the present invention,
It is possible to detect abnormalities of the stator core during operation with high sensitivity at an early stage, and also to detect the position of abnormalities in the axial direction. It has become possible to provide a highly reliable stator core abnormality detection device.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の検出装置の一実施例を示す概略構成
図。
FIG. 1 is a schematic configuration diagram showing an embodiment of a detection device of the present invention.

【図2】固定子鉄心が正常時の、本発明の検出装置の動
作を示す図。
FIG. 2 is a diagram showing the operation of the detection device of the present invention when the stator core is normal.

【図3】固定子鉄心が異常時の、本発明の検出装置の動
作を示す図。
FIG. 3 is a diagram showing the operation of the detection apparatus of the present invention when the stator core is abnormal.

【図4】本発明の検出装置の他の実施例を示す図。FIG. 4 is a diagram showing another embodiment of the detection device of the present invention.

【図5】固定子鉄心抜板間の短絡回路の形成を示す図。FIG. 5 is a diagram showing formation of a short circuit between stator core blanks.

【符号の説明】[Explanation of symbols]

1…固定子鉄心 2a,2b,2c,2d…鉄心ブロック 3…通風ダクト 4…磁束検出コイル 5…固定子コイル 6…固定子スロット 7…警報装置 8…キーバー 9…第1の短絡 10…第2の短絡 11…短絡電流 12…抜板 14…短絡回路 1 ... Stator core 2a, 2b, 2c, 2d ... Core block 3 ... Ventilation duct 4 ... Magnetic flux detection coil 5 ... Stator coil 6 ... Stator slot 7 ... Alarm device 8 ... Key bar 9 ... First short circuit 10 ... No. 2 short circuit 11 ... Short circuit current 12 ... Blank 14 ... Short circuit

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 表面に絶縁被膜を有する抜板を積層して
成り、冷却用の通風ダクトを有する固定子鉄心におい
て、通風ダクトで分割される複数個の鉄心ブロックに、
通風ダクトを通り各鉄心ブロックを囲む磁束検出コイル
を配置するとともに、各磁束検出コイルの誘起電圧の合
成電圧が互いに差し引きされるように各検出コイルを結
線したことを特徴とする固定子鉄心異常検出装置。
1. A stator core having a ventilation duct for cooling, which is formed by laminating blanks each having an insulating coating on a surface thereof, and a plurality of core blocks divided by the ventilation duct,
Detecting stator core abnormality by arranging the magnetic flux detection coil that surrounds each core block through the ventilation duct and connected each detection coil so that the combined voltage of the induced voltage of each magnetic flux detection coil is subtracted from each other. apparatus.
【請求項2】 各磁束検出コイルの合成電圧の変化分が
設定値を越えたとき警報を出す警報装置を備えたことを
特徴とする請求項1に記載の固定子鉄心異常検出装置。
2. The stator core abnormality detecting device according to claim 1, further comprising an alarm device for issuing an alarm when a change in the combined voltage of the magnetic flux detecting coils exceeds a set value.
JP10731292A 1992-04-27 1992-04-27 Stator core abnormality detector Expired - Fee Related JP3270105B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10731292A JP3270105B2 (en) 1992-04-27 1992-04-27 Stator core abnormality detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10731292A JP3270105B2 (en) 1992-04-27 1992-04-27 Stator core abnormality detector

Publications (2)

Publication Number Publication Date
JPH05304745A true JPH05304745A (en) 1993-11-16
JP3270105B2 JP3270105B2 (en) 2002-04-02

Family

ID=14455893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10731292A Expired - Fee Related JP3270105B2 (en) 1992-04-27 1992-04-27 Stator core abnormality detector

Country Status (1)

Country Link
JP (1) JP3270105B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017153344A (en) * 2016-02-25 2017-08-31 三菱日立パワーシステムズ株式会社 Rotary electric machine and method of detecting abnormality of the same
WO2024089788A1 (en) * 2022-10-26 2024-05-02 三菱電機株式会社 Short circuit detection device and short circuit detection method for rotating electric machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7446938B2 (en) 2020-07-16 2024-03-11 株式会社東芝 Abnormality detection system for rotating electrical machines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01234035A (en) * 1988-03-15 1989-09-19 Toshiba Corp Interlayer short-circuit detecting device for field winding
JPH02219435A (en) * 1989-02-16 1990-09-03 Toshiba Corp Detecting device of layer short position for field winding

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01234035A (en) * 1988-03-15 1989-09-19 Toshiba Corp Interlayer short-circuit detecting device for field winding
JPH02219435A (en) * 1989-02-16 1990-09-03 Toshiba Corp Detecting device of layer short position for field winding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017153344A (en) * 2016-02-25 2017-08-31 三菱日立パワーシステムズ株式会社 Rotary electric machine and method of detecting abnormality of the same
WO2024089788A1 (en) * 2022-10-26 2024-05-02 三菱電機株式会社 Short circuit detection device and short circuit detection method for rotating electric machine

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