JP2518405B2 - Rotor winding looseness diagnosis method - Google Patents
Rotor winding looseness diagnosis methodInfo
- Publication number
- JP2518405B2 JP2518405B2 JP1158783A JP15878389A JP2518405B2 JP 2518405 B2 JP2518405 B2 JP 2518405B2 JP 1158783 A JP1158783 A JP 1158783A JP 15878389 A JP15878389 A JP 15878389A JP 2518405 B2 JP2518405 B2 JP 2518405B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- rotor winding
- vibration
- bar conductor
- core
- 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
Landscapes
- Induction Machinery (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は回転電機の回転子に組込まれた巻線の保持
状態を診断する方法に関する。The present invention relates to a method for diagnosing a holding state of a winding incorporated in a rotor of a rotary electric machine.
回転電機の回転子に装着した回転子巻線の異常（ゆる
み）の有無の診断は、従来、目視検査あるいはテストハ
ンマを使っての手触もしくは打音による感応検査で行っ
ていた。Conventionally, the presence or absence of abnormality (looseness) in the rotor winding attached to the rotor of a rotating electrical machine has been diagnosed by a visual inspection or a sensation test by a touch hammer or a tap hammer using a test hammer.
このため、客観的、定量的なデータが無く、作業者の
勘に頼らざるを得ず、作業者によってゆるみ判定が大き
くバラツキ、誤診断による回転子巻線の焼損や摩耗が発
生するという問題があった。For this reason, there is no objective and quantitative data, there is no choice but to rely on the intuition of the worker, and there is a problem that the looseness judgment greatly varies depending on the worker, and burnout or wear of the rotor winding due to misdiagnosis occurs. there were.
この発明は上記問題を解消するためになされたもの
で、回転子巻線のゆるみの有無をを従来に比し客観的に
診断することができる回転子巻線のゆるみ診断方法を提
供することを目的とする。The present invention has been made to solve the above problems, and provides a rotor winding looseness diagnosing method capable of objectively diagnosing the presence or absence of looseness of a rotor winding as compared with the conventional method. To aim.
この発明は上記目的を達成するため、回転子巻線を加
振して回転子巻線および回転子コアの振動加速度をそれ
ぞれ測定し、両振動加速度の比を演算して該比の大きさ
から回転子巻線のゆるみの程度を診断する構成としたも
のである。In order to achieve the above-mentioned object, the present invention vibrates a rotor winding to measure vibration accelerations of a rotor winding and a rotor core, calculates a ratio of both vibration accelerations, and calculates the ratio from the magnitude of the ratio. The configuration is such that the degree of looseness of the rotor winding is diagnosed.
回転子巻線が回転子コアに良好に装着され、回転子巻
線のゆるみが無い時には、両者に加振力を加えたときの
両者の振動加速度比はほぼ１になるので、振動加速度比
から回転子巻線のゆるみの程度を客観的に知ることがで
きる。When the rotor winding is properly attached to the rotor core and there is no looseness in the rotor winding, the vibration acceleration ratio of both when applying an exciting force to both becomes approximately 1, so from the vibration acceleration ratio It is possible to objectively know the degree of looseness of the rotor winding.
以下、この発明の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図はこの発明を実施する回転電機の回転子の１例
を示したもので、この回転子はかご形誘導電動機の回転
子である。１は回転子のコア、２はバー導体、３はエン
ドリング、４は回転子軸、５は軸受であり、第２図はこ
の回転子の縦断面部分図を示している。FIG. 1 shows an example of a rotor of a rotary electric machine embodying the present invention, and this rotor is a rotor of a squirrel cage induction motor. Reference numeral 1 is a rotor core, 2 is a bar conductor, 3 is an end ring, 4 is a rotor shaft, 5 is a bearing, and FIG. 2 is a partial longitudinal sectional view of the rotor.
第２図において、６は加振ハンマ、７と８は加速度セ
ンサ、９は周波数分析器である。加速度センサ７はコア
１の振動加速度Ｂを検出し、加速度センサ８はバー導体
２の振動加速度Ａを検出し、両者が検出した振動加速度
ＡとＢは演算器（この例では、周波数分析器）９に入力
される。In FIG. 2, 6 is a vibration hammer, 7 and 8 are acceleration sensors, and 9 is a frequency analyzer. The acceleration sensor 7 detects the vibration acceleration B of the core 1, the acceleration sensor 8 detects the vibration acceleration A of the bar conductor 2, and the vibration accelerations A and B detected by both are a calculator (in this example, a frequency analyzer). 9 is input.
加振ハンマ６でバー導体２を打って、バー導体２を振
動させた場合、バー導体２がコア１のスロット内に良好
に、密着性良く収まっていれば、バー導体２の振動が良
好にコア１に伝達されるので、バー導体２とコア１は一
体的に振動し、両者の振動加速度はほぼ等しくなるが、
密着性が不充分であると、バー導体２の振動はコア１に
伝わりにくく、コア１の振動加速度Ｂはバー導体２の振
動加速度Ａよりも小さくなる。従って、A/Bを演算すれ
ば、バー導体２のゆるみの程度を定量的に知ることがで
き、周波数分析器９はこのA/Bを演算する。When the bar conductor 2 is vibrated by hitting the bar conductor 2 with the vibration hammer 6, if the bar conductor 2 fits well in the slot of the core 1 and has good adhesion, the bar conductor 2 vibrates well. Since it is transmitted to the core 1, the bar conductor 2 and the core 1 vibrate integrally, and the vibration accelerations of both are almost equal.
If the adhesion is insufficient, the vibration of the bar conductor 2 is less likely to be transmitted to the core 1, and the vibration acceleration B of the core 1 is smaller than the vibration acceleration A of the bar conductor 2. Therefore, if A / B is calculated, the degree of looseness of the bar conductor 2 can be quantitatively known, and the frequency analyzer 9 calculates this A / B.
次に、本発明者が行った実験結果について説明する。 Next, the result of the experiment conducted by the present inventor will be described.
第３図はコア１のスロット開口部1Aとバー導体２を示
したもので、第４図はバー導体２のスロット開口部側の
端部をタガネで打ち、スウエッジ10を形成して該端部を
スロット幅方向にふくらませることによりコア１との密
着性を良くした構造を示している。このバー導体２の上
記ふくらませた変形部分の面積のバー導体全面積に対す
る割合（スウエッジ加工率）が高い程、バー導体２のゆ
るみが少ない。FIG. 3 shows the slot opening 1A of the core 1 and the bar conductor 2. FIG. 4 shows that the end of the bar conductor 2 on the side of the slot opening is hit with a chisel to form a swedge 10 and the end is formed. The structure is shown in which the adhesiveness with the core 1 is improved by inflating in the slot width direction. The higher the ratio of the area of the inflated deformed portion of the bar conductor 2 to the entire area of the bar conductor (wedge processing rate), the less the bar conductor 2 is loosened.
第５図は、このスウエッジ加工率の小さいバー導体に
上記加振ハンマ６による振動を加えた場合の振動加速度
Ａ、Ｂの測定結果を示したものであり、第６図はスウエ
ッジ加工率の大きいバー導体に上記加振ハンマ６による
振動を加えた場合の振動加速度Ａ、Ｂの測定結果を示し
たものである。両図から、スウエッジ加工率が低い場合
は、Ａ＞Ｂであるが、スウエッジ加工率が高くなると、
ＡとＢがほぼ等しくなることがわかる。第７図はこの測
定を多数回行って得られた測定データを整理したもので
あり、スウエッジ加工率が高くなるに伴い、すなわちバ
ー導体のゆるみが小さくなるに伴い振動加速度比A/Bが
小さくなり、１に近づくことがわかる。FIG. 5 shows the measurement results of the vibration accelerations A and B when the vibration by the vibration hammer 6 is applied to the bar conductor having the small swedging rate, and FIG. 6 shows the large swaging rate. 3 shows the measurement results of vibration accelerations A and B when the bar conductor is vibrated by the vibration hammer 6. From both figures, when the wedge cutting rate is low, A> B, but when the wedge cutting rate is high,
It can be seen that A and B are almost equal. Fig. 7 summarizes the measurement data obtained by performing this measurement many times, and the vibration acceleration ratio A / B becomes smaller as the sewage processing rate becomes higher, that is, the looseness of the bar conductor becomes smaller. It turns out that it approaches 1.
従って、振動加速度比A/Bの値からバー導体２のゆる
みの程度を定量的に知ることができる。Therefore, the degree of looseness of the bar conductor 2 can be quantitatively known from the value of the vibration acceleration ratio A / B.
なお、上記実施例では、かご形誘導電動機の回転子巻
線について説明したが、この発明は巻線形誘導電動機等
の他の回転電機の回転子巻線のゆるみ診断に用いること
ができる。Although the rotor winding of the squirrel-cage induction motor has been described in the above embodiments, the present invention can be used for looseness diagnosis of the rotor winding of other rotary electric machines such as a winding-type induction motor.
また、振動加速度比を得るための演算器として周波数
分析器を用いているが、時間軸波形で振動加速度比を演
算する演算器を用いてもよい。Further, although the frequency analyzer is used as the calculator for obtaining the vibration acceleration ratio, a calculator for calculating the vibration acceleration ratio with a time axis waveform may be used.
また、振動加速度を検出して、その比の値を診断基準
としているが、速度もしくは変位量を検出しても良い。Further, although the vibration acceleration is detected and the value of the ratio is used as the diagnostic reference, the speed or the displacement amount may be detected.
この発明は以上説明した通り、回転子巻線と回転子コ
アの振動加速度比という物理的データから回転子巻線の
ゆるみの程度を診断するから、従来の場合に比して診断
のバラツキを少なくし、かつ、正確な診断を行うことが
でき、誤診断により回転子巻線のゆるみが看過されて起
こる焼損事故等を低減することができる。As described above, the present invention diagnoses the degree of looseness of the rotor winding based on the physical data of the vibration acceleration ratio of the rotor winding and the rotor core, so that there is less variation in diagnosis than in the conventional case. In addition, it is possible to perform accurate diagnosis, and it is possible to reduce burnout accidents or the like that may occur due to erroneous diagnosis resulting in the looseness of the rotor winding being overlooked.
第１図はこの発明を実施する回転子の１例を示す側面
図、第２図はこの発明の実施例を示す構成要素の配置
図、第３図と第４図はこの発明を実施した回転子の回転
子コアと回転子巻線の構成を示す部分図、第５図と第６
図はこの発明を実施して得た振動加速度−周波数特性
図、第７図は上記振動加速度−周波数特性図をデータ処
理して作成した振動加速度−スウエッジ加工率関係図で
ある。 図において、１……回転子コア、２……バー導体、７、
８……加速度センサ、９……周波数分析器。 なお、図中、同一符号は同一または相当部分を示す。FIG. 1 is a side view showing an example of a rotor for carrying out the invention, FIG. 2 is a layout view of components showing an embodiment of the invention, and FIGS. 3 and 4 are rotations carrying out the invention. Partial views showing the structure of the rotor core and rotor winding of the child, FIGS. 5 and 6
FIG. 7 is a vibration acceleration-frequency characteristic diagram obtained by carrying out the present invention, and FIG. 7 is a vibration acceleration-swedge processing rate relationship diagram created by data-processing the vibration acceleration-frequency characteristic diagram. In the figure, 1 ... Rotor core, 2 ... Bar conductor, 7,
8 ... Acceleration sensor, 9 ... Frequency analyzer. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
機の回転子における回転子巻線のゆるみ診断方法におい
て、 前記回転子巻線に振動を加えて、前記回転子巻線と前記
回転子コアの振動加速度を測定し、この測定結果から前
記回転子巻線と前記回転子コアの振動加速度比を求め、
前記回転子巻線のゆるみを診断することを特徴とする回
転子巻線のゆるみ診断方法。1. A method for diagnosing looseness of a rotor winding in a rotor of a rotating electric machine having a rotor winding and a rotor core, wherein a vibration is applied to the rotor winding to provide the rotor winding and the rotor winding. The vibration acceleration of the rotor core is measured, and the vibration acceleration ratio of the rotor winding and the rotor core is obtained from the measurement result,
A method for diagnosing slack in a rotor winding, comprising diagnosing slack in the rotor winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1158783A JP2518405B2 (en) | 1989-06-21 | 1989-06-21 | Rotor winding looseness diagnosis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1158783A JP2518405B2 (en) | 1989-06-21 | 1989-06-21 | Rotor winding looseness diagnosis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0327752A JPH0327752A (en) | 1991-02-06 |
| JP2518405B2 true JP2518405B2 (en) | 1996-07-24 |
Family
ID=15679240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1158783A Expired - Lifetime JP2518405B2 (en) | 1989-06-21 | 1989-06-21 | Rotor winding looseness diagnosis method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2518405B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3235389B2 (en) * | 1995-01-31 | 2001-12-04 | 三菱電機株式会社 | Laser processing apparatus and processing method |
| JP5584036B2 (en) * | 2009-10-22 | 2014-09-03 | 日機装株式会社 | Deterioration diagnosis device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6390968U (en) * | 1986-12-02 | 1988-06-13 |
-
1989
- 1989-06-21 JP JP1158783A patent/JP2518405B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0327752A (en) | 1991-02-06 |
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