JPH09257562A - Abnormality diagnostic method of motor-driven machine - Google Patents
Abnormality diagnostic method of motor-driven machineInfo
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- JPH09257562A JPH09257562A JP8894696A JP8894696A JPH09257562A JP H09257562 A JPH09257562 A JP H09257562A JP 8894696 A JP8894696 A JP 8894696A JP 8894696 A JP8894696 A JP 8894696A JP H09257562 A JPH09257562 A JP H09257562A
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、モータ等の電動機
械の異常をその振動の加速度または速度，変位に基づい
て診断する電動機械の異常診断方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for diagnosing an abnormality in an electric machine such as a motor based on the acceleration, speed or displacement of vibration.
【０００２】[0002]
【従来の技術】従来、発電機，電動機等の回転機械にお
いては、使用に伴い取付け部の弛み，損傷，または軸受
や部品の劣化，損耗等が生じ、時によっては直ちに運転
を停止してその対応を講じなければならない場合があ
る。この回転機械の異常を監視する手段として、例えば
図５に、横軸に振動周波数，縦軸に振動値である加速度
をとった機械振動系の周波数分布の概念図を示すよう
に、従来より振動解析による方法が用いられている。2. Description of the Related Art Conventionally, in rotating machines such as generators and electric motors, slackening or damage of a mounting portion or deterioration or wear of bearings or parts occurs due to use, and the operation is immediately stopped immediately after that. You may have to take action. As a means for monitoring the abnormality of the rotating machine, for example, as shown in FIG. 5, a conceptual diagram of the frequency distribution of a mechanical vibration system in which the horizontal axis represents the vibration frequency and the vertical axis represents the acceleration which is the vibration value An analytical method is used.
【０００３】この方法は、回転中の機器の振動を加速度
センサで検出し、正常な状態で機器を設置した時に測定
した振動値とを比較し、両者の差がある値以上に達した
場合に異常を判定するものである。異常監視を行う場
合、異常判定結果に基づいて警報を発生させ、さらには
機器の停止等を自動的に行うようにしている。In this method, the vibration of a rotating device is detected by an acceleration sensor and compared with the vibration value measured when the device is installed in a normal state, and when the difference between the two reaches a certain value or more. It is to determine abnormality. When performing abnormality monitoring, an alarm is generated based on the abnormality determination result, and further, the equipment is stopped automatically.
【０００４】[0004]
【発明が解決しようとする課題】しかし上記従来の技術
にあっては、振動の検出をある１点の回転数に固定して
行っている。また従来一般の電動機械の設備診断は、一
定速度，一定負荷の条件でしか行われなかった。ところ
が回転数が変化すると、同一劣化状態でありながら回転
変化に伴って機器の振動が変化する。このため機器の回
転数が変化するような稼働状況のもとでは、異常でない
時でも警報が発せられる事態がしばしば生じるため、傾
向管理ができなかった。However, in the above-mentioned conventional technique, the vibration is detected by fixing the rotation speed at one point. Further, the conventional equipment diagnosis of a general electric machine has been performed only under a condition of constant speed and constant load. However, when the rotation speed changes, the vibration of the device changes with the rotation change even in the same deterioration state. For this reason, under operating conditions in which the number of revolutions of the equipment changes, an alarm is often issued even when there is no abnormality, so trend management cannot be performed.
【０００５】また例えば、先に出願した特願平６−２４
８９９号に記載の「回転機器の異常診断方法」は、異常
の状態を回転数により補正するものであるが、この方法
では一定負荷条件，ただし基本的には無負荷であるが、
この条件のみでしか診断できなかった。Further, for example, Japanese Patent Application No. 6-24 filed previously filed.
The "method for diagnosing abnormalities in rotating equipment" described in No. 899 is to correct an abnormal state by the number of revolutions. In this method, a constant load condition, but basically no load,
Diagnosis was possible only with this condition.
【０００６】このように従来の技術では、運転状態が変
化する場合、同一劣化状態においても測定値が変化する
ため、相対比較が困難であった。従って速度，負荷一定
の条件を作り出すことが不可欠であり、運転条件によっ
てはほとんど診断できない場合があった。そのために従
来の振動解析技術では適用機器が限定されており、実用
性に乏しかった。As described above, in the conventional technique, when the operating state changes, the measured value changes even in the same deteriorated state, so that relative comparison is difficult. Therefore, it is indispensable to create a condition where the speed and load are constant, and there are cases where it is almost impossible to make a diagnosis depending on the operating conditions. Therefore, the conventional vibration analysis technology is limited in applicable equipment and is not practical.
【０００７】本発明は上記課題によりなされたもので、
負荷変動が頻繁に行われ、一定診断条件をとるのが困難
な電動機械の、振動解析による診断を可能とする電動機
械の異常診断方法を提供する。The present invention has been achieved by the above problems,
Provided is a method for diagnosing an abnormality in an electric machine, which makes it possible to make a diagnosis by vibration analysis of an electric machine in which a load change is frequently performed and a certain diagnosis condition is difficult to be taken.
【０００８】[0008]
(1) 本発明は、電動機械の正常運転時の電力値および
該運転時の振動値との相対関係を１次または２次以上の
高次関数による近似式にて表現し、該近似式を用いて電
動機械の任意の電力値における振動値を予め定めた基準
電力値の振動値に補正し、この補正値が基準電力値にお
けるしきい値を越えることによって異常を判定すること
を特徴とする電動機械の異常診断方法である。(1) The present invention expresses a relative relationship between an electric power value during normal operation of an electric machine and a vibration value during the operation by an approximate expression using a higher-order function of a first order or a second order or more, and the approximate expression It is characterized in that a vibration value at an arbitrary electric power value of an electric machine is corrected to a vibration value of a predetermined reference electric power value by using the electric machine, and an abnormality is determined when the correction value exceeds a threshold value at the reference electric power value. This is a method for diagnosing an abnormality in an electric machine.
【０００９】(2) 上記（１）項の異常診断方法におい
て、１次または２次以上の高次関数に代え、指数関数を
用いる電動機械の異常診断方法である。(2) In the abnormality diagnosis method of the above item (1), an electric machine abnormality diagnosis method using an exponential function in place of the first-order or higher-order higher-order functions.
【００１０】(3) また上記（１）項の異常診断方法に
おいて、１次または２次以上の高次関数に代え、対数関
数を用いる電動機械の異常診断方法である。(3) In addition, in the abnormality diagnosing method of the above item (1), the abnormality diagnosing method of the electric machine uses a logarithmic function in place of the higher-order function of the first or second order or higher.
【００１１】(4) さらには上記（１），（２）または
（３）項の異常診断方法において、電力値に代え、電流
値を用いる電動機械の異常診断方法である。(4) Furthermore, in the abnormality diagnosing method of the above (1), (2) or (3), it is an abnormality diagnosing method for an electric machine which uses a current value instead of an electric power value.
【００１２】[0012]
【発明の実施の形態】図１は、本発明による電動機械の
異常診断方法を説明するフローチャートであり、また図
２は本発明を実施する異常診断装置の１例を示すブロッ
ク図である。1 is a flow chart for explaining an abnormality diagnosis method for an electric machine according to the present invention, and FIG. 2 is a block diagram showing an example of an abnormality diagnosis apparatus for implementing the present invention.
【００１３】図２に示すように異常診断装置は、ＣＰＵ
（中央処理ユニット）１０１を中心に、バス１０２に接
続された入力インターフェース１０３、プログラム及び
設定値が格納されたＲＯＭ（リード・オンリー・メモ
リ）１０４、測定値等が一時的に格納されるＲＡＭ（ラ
ンダム・アクセス・メモリ）１０５、及び出力インター
フェース１０６から構成されるコンピュータ部分を主体
に構成されている。[0013] As shown in FIG.
(Central processing unit) 101, an input interface 103 connected to a bus 102, a ROM (read only memory) 104 storing programs and set values, and a RAM (temporarily storing measured values). It is mainly composed of a computer part comprising a random access memory (105) and an output interface 106.
【００１４】さらに入力インターフェース１０３には、
振動値である加速度または速度，変位を測定する振動セ
ンサ１０７が接続され、出力インターフェース１０６に
は、ブザー等の電気−音響変換デバイスおよびこれを駆
動する駆動回路からなる警報器１０８が接続されてい
る。Further, the input interface 103 includes:
A vibration sensor 107 that measures acceleration or velocity, which is a vibration value, and displacement is connected. The output interface 106 is connected to an alarm device 108 that includes an electro-acoustic conversion device such as a buzzer and a drive circuit that drives the electro-acoustic conversion device. .
【００１５】振動センサ１０７は、異常診断の測定対象
である電動機械に間接または直接的に設置され、駆動に
伴う振動を加速度または速度，変位の形で測定する。そ
してＣＰＵ１０１にて図１に示す処理を実行する。The vibration sensor 107 is installed indirectly or directly on the electric machine, which is the object of measurement for abnormality diagnosis, and measures the vibration associated with the drive in the form of acceleration, velocity, or displacement. Then, the CPU 101 executes the processing shown in FIG.
【００１６】先ず設置した直後の正常な状態における電
動機械の電力値と振動の関係を測定し、これを初期値と
して記憶保存する（ステップ−１）。次に現時点すなわ
ち稼働中の振動値を振動センサ１０７によって測定し、
この測定値をＣＰＵ１０１は入力インターフェース１０
３を介して読み込み、バス１０２を介してＲＡＭ１０５
に格納する（ステップ−２）。First, the relationship between the electric power value and vibration of the electric machine in a normal state immediately after installation is measured, and this is stored and saved as an initial value (step-1). Next, the vibration value at the present time, that is, in operation, is measured by the vibration sensor 107,
The CPU 101 inputs this measured value to the input interface 10
3 via RAM 102 via bus 102
(Step-2).
【００１７】稼働中の電動機械の電力値が一定時間変化
しない場合、ステップ−３から処理をステップ−５へ移
行し、また一定時間の間に電力値の変化があった場合、
ステップ−２による測定値およびＲＯＭ１０４に保存し
てあるデータ，すなわち振動データと電力データをデー
タ抽出処理により求めた平均値に基づいて補正演算を行
う（ステップ−４）。この補正演算は、電力値ｗと振動
値Ｖとの相関関係を最小二乗法で近似計算して、近似式
を求めるもので、この補正処理について以下説明する。When the electric power value of the operating electric machine does not change for a certain period of time, the process shifts from step-3 to step-5, and when the electric power value changes during the certain period of time,
Correction calculation is performed based on the measured value obtained in step-2 and the data stored in the ROM 104, that is, the vibration data and the power data, based on the average value obtained by the data extraction process (step-4). In this correction calculation, the correlation between the power value w and the vibration value V is approximately calculated by the least square method to obtain an approximate expression. This correction processing will be described below.
【００１８】図３，図４は電動機械の同一劣化状態にお
ける電力値ｗと振動値Ｖの測定結果の関係を示す。電力
値は回転数および負荷状態によって変化し、機器への影
響を正確に表していると判断できる。3 and 4 show the relationship between the electric power value w and the vibration value V measured in the same deteriorated state of the electric machine. The electric power value changes depending on the rotation speed and the load state, and it can be determined that the influence on the equipment is accurately represented.
【００１９】図３，図４にプロットした測定値からも判
るように、電動機械の振動値Ｖは同一劣化状態において
も相当ばらつきがあり、これを負荷状態（電力値）を考
慮しないで傾向管理していくことは、診断精度の低下と
なり、実用的ではない。そこで電力値ｗと振動値Ｖとの
相対関係を最小二乗法で近似し、近似式Ｓw を作成する
ことで、任意の電力値ｗn における振動値Ｖn を基準電
力ｗs の振動値Ｖs に補正し、傾向管理する。As can be seen from the measured values plotted in FIGS. 3 and 4, the vibration value V of the electric machine has considerable variation even in the same deteriorated state, and this tendency management is performed without considering the load state (electric power value). Doing so will reduce the diagnostic accuracy and is not practical. Then, the relative relationship between the power value w and the vibration value V is approximated by the least squares method, and the approximate expression S w is created, so that the vibration value V n at an arbitrary power value w n is the vibration value V s of the reference power w s. Correct to s and manage the trend.
【００２０】この近似式は１次以上の関数であり、また
この近似式は指数関数または対数関数であってもよい。This approximate expression is a function of a first or higher degree, and this approximate expression may be an exponential function or a logarithmic function.
【００２１】補正式の考え方（その１）について、先ず
図３において、近似式は本来ならば図における縦横軸の
原点を通るべきであるが、実測データのばらつき，ベー
スとなる振動の影響もあり、若干ずれるのが一般的であ
り、そこで近似式ＳW1が切片をＢ1 とする下記数１の１
次式で表せる場合、補正式ＶW1も電力が振動に１次比例
するという関係は変わらないので、傾きａ1 で切片Ｂ1
とする下記数２のようになる。Regarding the concept of the correction formula (No. 1), first, in FIG. 3, the approximate formula should normally pass through the origin of the vertical and horizontal axes in the figure, but there are variations in the measured data and the influence of the base vibration. a the slightly deviated general, where the approximate equation S 1 W1 is the following equation 1 for the intercept and B 1
If expressed by the following equation, the correction formula V W1 also does not change the relationship that the power is proportional primary to the vibration, the intercept with a gradient a 1 B 1
The following formula 2 is obtained.
【００２２】[0022]
【数１】ＳW1＝Ａ1 ｗ1 ＋Ｂ1 [Equation 1] S W1 = A 1 w 1 + B 1
【００２３】[0023]
【数２】ＶW1＝ａ1 ｗ1 ＋Ｂ1 [Formula 2] V W1 = a 1 w 1 + B 1
【００２４】ここで、Ｂ1 点ではいずれも電力値はゼロ
であり、振動値は変わらない。従って基準電力ｗs1での
補正振動Ｖs1は下記数３で表すことができる。なお図３
において、Ｔ1 は予め定めたしきい値，またｗn1は任意
の運転時における電力値である。At point B 1 , the electric power value is zero and the vibration value does not change. Thus corrected vibration V s1 of the reference power w s1 can be expressed by the following Expression 3. FIG. 3
In the above, T 1 is a predetermined threshold value, and w n1 is an electric power value during an arbitrary operation.
【００２５】[0025]
【数３】ＶS1＝ａ1 ｗ S1 ＋Ｂ1 ただし： ａ1 ＝（Ｖ n1 −Ｂ1 ）／ｗ n1 ## EQU3 ## V S1 = a 1 w S1 + B 1 where : a 1 = (V n1 −B 1 ) / w n1
【００２６】次に補正式の考え方（その２）について、
図３において、近似式が２次以上の多項式で表せる場合
にも、上記同様原点を通らない曲線となる。そこで近似
式ＳW2が（Ｂ2 ，Ｃ2 ）を最下点とする下記数４の２次
式で表せる場合、補正式ＶW2も電力の２乗が振動に比例
するという関係は変わらないので、（Ｂ2 ，Ｃ2 ）を最
下点とする下記数５のようになる。Next, regarding the concept of the correction formula (No. 2),
In FIG. 3, even when the approximate expression can be expressed by a polynomial of quadratic or higher, the curve does not pass through the origin like the above. Therefore, when the approximate expression S W2 can be expressed by a quadratic expression of the following Expression 4 in which (B 2 , C 2 ) is the lowest point, the relationship that the square of the electric power is proportional to the vibration does not change in the correction expression V W2 . , (B 2 , C 2 ) as the lowest point, the following equation 5 is obtained.
【００２７】[0027]
【数４】Ｓw2＝Ａ2 （ｗ2 −Ｂ2 ）2 ＋Ｃ2 [Number 4] S w2 = A 2 (w 2 -B 2) 2 + C 2
【００２８】[0028]
【数５】Ｖw2＝ａ2 （ｗ2 −Ｂ2 ）2 ＋Ｃ2 [ Formula 5] V w2 = a 2 (w 2 −B 2 ) 2 + C 2
【００２９】従って基準電力ｗS2での補正振動ＶS2は下
記数６で表すことができる。なお図４において、Ｔ2 は
予め定めたしきい値，またｗn2は任意の運転時における
電力値である。Therefore, the corrected vibration V S2 at the reference power w S2 can be expressed by the following equation 6. In FIG. 4, T 2 is a predetermined threshold value, and w n2 is an electric power value during an arbitrary operation.
【００３０】[0030]
【数６】ＶS2＝ａ2 （ｗS2−Ｂ2 ）2 ＋Ｃ2 ただし： ａ2 ＝（Ｖn2−Ｃ2 ）／（ｗn2−Ｂ2 ）2 ## EQU6 ## V S2 = a 2 (w S2- B 2 ) 2 + C 2 where : a 2 = (V n2- C 2 ) / (w n2- B 2 ) 2
【００３１】上記形態例では、電動機械の電力値ｗと振
動値Ｖとを対応させて補正を行ったが、電力値に代えて
電流値Ｉを用いてもよい。In the above embodiment, the electric power value w of the electric machine is associated with the vibration value V for correction, but the electric current value I may be used instead of the electric power value.
【００３２】このような演算を行うプログラムはＲＯＭ
１０４に組み込まれており、その実行はＣＰＵ１０１に
よって行われる。また補正後の振動値ＶS に対し、予め
設定されているしきい値を超えたか否かを判定する（ス
テップ−５）。A program for performing such calculation is a ROM
It is incorporated in the CPU 104, and its execution is performed by the CPU 101. Also with respect to the vibration value V S after correction determines whether exceeds a preset threshold (Step -5).
【００３３】ここでしきい値を超えていれば異常である
と見做し、ＣＰＵ１０１は出力インターフェース１０６
を介して警報器１０８を作動させて警告を発する（ステ
ップ−６）。またステップ−３で電力値変化無しが判定
された場合も、その振動値がしきい値を超えたか否かを
判定し、超えていれば異常と見做して警告を発する。If the threshold value is exceeded, it is considered to be abnormal, and the CPU 101 causes the output interface 106
The alarm device 108 is activated through the alarm to issue a warning (step-6). Also, when it is determined in step-3 that the power value has not changed, it is determined whether or not the vibration value exceeds the threshold value, and if it exceeds the threshold value, it is considered abnormal and a warning is issued.
【００３４】なお上記実施の形態例では、１次および２
次の関数による近似式を用いて補正を行う場合について
説明したが、上記関数に代わり次に示すような指数関数
または対数関数を用いてもよい。すなわち指数関数およ
び対数関数を用いる場合の近似式（ＳWe，ＳWg），補正
式（ＶWe，ＶWg），補正振動値（ＶSe，ＶSg）は、それ
ぞれ次の数７〜数１２で表される。In the above embodiment, the primary and secondary
Although the case where the correction is performed using the approximation formula of the following function has been described, an exponential function or a logarithmic function as shown below may be used instead of the above function. That is, the approximation formulas (S We , S Wg ), the correction formulas (V We , V Wg ), and the correction vibration values (V Se , V Sg ) in the case of using the exponential function and the logarithmic function are the following expressions 7 to 12 respectively. It is represented by.
【００３５】[0035]
【数７】先ず指数関数の場合は、次のように表される。 ＳWe＝Ａe ・ exp（Ｂe ・ｗe ) ＋Ｃe ## EQU00007 ## First, in the case of the exponential function, it is expressed as follows. S We = A e · exp (B e · w e ) + C e
【００３６】[0036]
【数８】ＶWe＝ａe ・ exp（Ｂe ・ｗe ) ＋Ｃe (8) V We = a e · exp (B e · w e ) + C e
【００３７】[0037]
【数９】ＶSe＝ａe ・ exp（Ｂe ・ｗSe) ＋Ｃe [ Equation 9] V Se = a e · exp (B e · w Se ) + C e
【００３８】ただし： ａe ＝（Ｖne−Ｃe ）／ exp（Ｂｅ・ｗne）However: a e = (V ne −C e ) / exp (Be · w ne )
【数１０】また対数関数の場合は、次のように表され
る。 ＳWg＝Ａg ・log e （ｗg ＋Ｂg ) ＋Ｃg In the case of a logarithmic function, it is expressed as follows. S Wg = A g · log e (w g + B g ) + C g
【００３９】[0039]
【数１１】ＶWg＝ａg ・log e （ｗg ＋Ｂg ) ＋Ｃg [ Expression 11] V Wg = a g · log e (w g + B g ) + C g
【００４０】[0040]
【数１２】ＶSg＝ａg ・log e （ｗSg＋Ｂg ) ＋Ｃg ただし： ａg ＝（Ｖng−Ｃg ）／log e （ｗng＋Ｂg ）## EQU12 ## V Sg = a g · log e (w Sg + B g ) + C g where : a g = (V ng −C g ) / log e (w ng + B g ).
【００４１】図６（ａ）〜（ｃ）は、振動加速度（Ｇ）
と負荷トルクすなわち負荷電流（％）の関係を調査した
結果を示し、駆動側としては４００ワットＡＣサーボモ
ータ，負荷としてＤＣブレーキモータを使用してこれを
ギアにて結合し、回転数を７５０，９００，１０５０ｒ
ｐｍと変化させて結合部のギアの３点で振動加速度を調
査した結果を示す。FIGS. 6A to 6C show vibration acceleration (G).
Shows the result of the investigation of the relationship between the load torque and the load current (%), using a 400 watt AC servomotor as the drive side and a DC brake motor as the load, and connecting them with a gear, and rotating at 750, 900, 1050r
The result of investigating the vibration acceleration at three points of the gear of the coupling portion while changing it to pm is shown.
【００４２】この調査結果より振動加速度（Ｇ）と負荷
電流（％）の関係は、回転数７５０ｒｐｍ付近では直線
に近いほぼ１次関数の関係，また７５０ｒｐｍ以上では
２次以上の高次関数の関係にあることを示しており、こ
のことより、本発明において運転時の電力値と振動値と
の相対関係は、１次または２次以上の高次関数による近
似式で表現することが妥当であることが示された。From the results of this investigation, the relationship between the vibration acceleration (G) and the load current (%) is almost linear in the vicinity of a rotation speed of 750 rpm, and is higher than quadratic in the case of 750 rpm or higher. Therefore, in the present invention, it is appropriate that the relative relationship between the electric power value and the vibration value during operation is expressed by an approximate expression of a first-order or a second-order or higher order function. Was shown.
【００４３】[0043]
【発明の効果】本発明は上記のように構成されているの
で、以下に記載する効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００４４】電動機械の正常運転時の電力値または電流
値と、この運転時の振動値との相対関係を１次または２
次以上の高次関数による近似式にて表現し、この近似式
を用いて任意の電力値または電流値における振動値を基
準電力値または電流値の振動値に補正し、この補正値に
よって異常を判定するようにしているので、負荷変動が
頻繁に行われ一定診断条件をとるのが困難な電動機械の
異常診断にあたって、振動解析法による診断が適用で
き、高精度な異常診断が可能となる。The relative relationship between the electric power value or electric current value during normal operation of the electric machine and the vibration value during this operation is shown as primary or secondary.
Expressed by an approximate expression with a higher-order function of the following or higher, use this approximate expression to correct the vibration value at an arbitrary power value or current value to the vibration value of the reference power value or current value, and use this correction value to identify abnormalities. Since the determination is made, it is possible to apply the diagnosis by the vibration analysis method to the abnormality diagnosis of the electric machine in which the load change is frequently performed and the constant diagnosis condition is difficult to be taken, and it is possible to perform the highly accurate abnormality diagnosis.
【００４５】また上記の電動機械の異常診断方法におい
て、１次または２次以上の高次関数に代え、指数関数ま
たは対数関数を用いることで、前記１次または高次関数
を用いたと同様に、電動機械に回転変動があっても振動
解析法による診断の適用とともに、高精度な異常診断が
可能となる。Further, in the above-described abnormality diagnosis method for an electric machine, an exponential function or a logarithmic function is used instead of the higher-order function of the first-order or second-order or higher order. Even if there is a rotation fluctuation in the electric machine, it is possible to apply the diagnosis by the vibration analysis method and perform highly accurate abnormality diagnosis.
【図１】本発明による電動機械の異常診断方法を説明す
るフローチャートである。FIG. 1 is a flowchart illustrating an abnormality diagnosis method for an electric machine according to the present invention.
【図２】本発明を実施する異常診断装置の１例を示すブ
ロック図である。FIG. 2 is a block diagram illustrating an example of an abnormality diagnosis device that implements the present invention.
【図３】電動機械の異常状態における電力値と振動値の
測定結果の関係を１次関数で表した場合を示す図面であ
る。FIG. 3 is a diagram showing a case where the relationship between the electric power value and the vibration value measurement result in an abnormal state of the electric machine is represented by a linear function.
【図４】電動機械の異常状態における電力値と振動値の
測定結果の関係を２次関数で表した場合を示す図面であ
る。FIG. 4 is a diagram showing a case where the relationship between the power value and the vibration value measurement result in an abnormal state of the electric machine is represented by a quadratic function.
【図５】回転機器における振動周波数に対する振動値の
関係を示した図面である。FIG. 5 is a diagram showing a relationship between a vibration value and a vibration frequency in a rotating device.
【図６】（ａ）〜（ｃ）は電動機械の振動加速度（Ｇ）
と負荷電流（％）の関係を調査した結果を示す図面であ
る。6A to 6C are vibration accelerations (G) of an electric machine.
It is drawing which shows the result of having investigated the relationship of the load current (%).
１０１ ＣＰＵ １０２ バス １０３ 入力インターフェース １０４ ＲＯＭ １０５ ＲＡＭ １０６ 出力インターフェース １０７ 振動センサー １０８ 警報器 101 CPU 102 Bus 103 Input Interface 104 ROM 105 RAM 106 Output Interface 107 Vibration Sensor 108 Alarm Device
Claims (4)
運転時の振動値との相対関係を１次または２次以上の高
次関数による近似式にて表現し、該近似式を用いて電動
機械の任意の電力値における振動値を予め定めた基準電
力値の振動値に補正し、この補正値が基準電力値におけ
るしきい値を越えることによって異常を判定することを
特徴とする電動機械の異常診断方法。1. A relative relationship between an electric power value during normal operation of an electric machine and a vibration value during the operation is expressed by an approximate expression by a first-order or higher-order function, and the approximate expression is used. An electric machine characterized by correcting a vibration value of an electric machine at an arbitrary electric power value to a vibration value of a predetermined reference electric power value, and determining an abnormality when the correction value exceeds a threshold value of the reference electric power value. Abnormality diagnosis method.
指数関数を用いることを特徴とする請求項１記載の電動
機械の異常診断方法。2. A first-order function or a higher-order function of second-order or higher,
The abnormality diagnosis method for an electric machine according to claim 1, wherein an exponential function is used.
対数関数を用いることを特徴とする請求項１記載の電動
機械の異常診断方法。3. A first-order or higher-order function of second or higher order,
The abnormality diagnosis method for an electric machine according to claim 1, wherein a logarithmic function is used.
徴とする請求項１，２または３記載の電動機械の異常診
断方法。4. The abnormality diagnosis method for an electric machine according to claim 1, wherein a current value is used instead of the power value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8894696A JPH09257562A (en) | 1996-03-19 | 1996-03-19 | Abnormality diagnostic method of motor-driven machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8894696A JPH09257562A (en) | 1996-03-19 | 1996-03-19 | Abnormality diagnostic method of motor-driven machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09257562A true JPH09257562A (en) | 1997-10-03 |
Family
ID=13957049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8894696A Withdrawn JPH09257562A (en) | 1996-03-19 | 1996-03-19 | Abnormality diagnostic method of motor-driven machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09257562A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006126075A (en) * | 2004-10-29 | 2006-05-18 | Matsuura Machinery Corp | Abnormality diagnosis method of bearing, and lubricating oil supply control method adopting the method |
| CN103438986A (en) * | 2013-08-15 | 2013-12-11 | 山东康威通信技术股份有限公司 | Vibration and skewing analysis method |
| JP2019080389A (en) * | 2017-10-20 | 2019-05-23 | ファナック株式会社 | Electric motor device |
| JP2020051876A (en) * | 2018-09-27 | 2020-04-02 | 株式会社ノーリツ | Hot water system and external server |
| JP2020204555A (en) * | 2019-06-18 | 2020-12-24 | 日立Ｇｅニュークリア・エナジー株式会社 | Abnormality diagnostic method of rotating machine |
-
1996
- 1996-03-19 JP JP8894696A patent/JPH09257562A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006126075A (en) * | 2004-10-29 | 2006-05-18 | Matsuura Machinery Corp | Abnormality diagnosis method of bearing, and lubricating oil supply control method adopting the method |
| CN103438986A (en) * | 2013-08-15 | 2013-12-11 | 山东康威通信技术股份有限公司 | Vibration and skewing analysis method |
| JP2019080389A (en) * | 2017-10-20 | 2019-05-23 | ファナック株式会社 | Electric motor device |
| US10700573B2 (en) | 2017-10-20 | 2020-06-30 | Fanuc Corporation | Motor device |
| JP2020051876A (en) * | 2018-09-27 | 2020-04-02 | 株式会社ノーリツ | Hot water system and external server |
| JP2020204555A (en) * | 2019-06-18 | 2020-12-24 | 日立Ｇｅニュークリア・エナジー株式会社 | Abnormality diagnostic method of rotating machine |
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