JPS6151683B2 - - Google Patents
Info
- Publication number
- JPS6151683B2 JPS6151683B2 JP21585682A JP21585682A JPS6151683B2 JP S6151683 B2 JPS6151683 B2 JP S6151683B2 JP 21585682 A JP21585682 A JP 21585682A JP 21585682 A JP21585682 A JP 21585682A JP S6151683 B2 JPS6151683 B2 JP S6151683B2
- Authority
- JP
- Japan
- Prior art keywords
- displacement meter
- output signal
- comparator
- counter
- rotating body
- 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
Links
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 230000005856 abnormality Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0442—Active magnetic bearings with devices affected by abnormal, undesired or non-standard conditions such as shock-load, power outage, start-up or touchdown
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Description
【発明の詳細な説明】
この発明は磁気軸受、静圧軸受等の異常状態を
検出する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting abnormal conditions in magnetic bearings, hydrostatic bearings, etc.
例えば磁気によつて軸を浮上させて支持する磁
気軸受、特に制御形磁気軸受に於いては、第１図
に示すように、軸１の位置を非接触形変位計２で
検出し、その出力が零になるように電磁コイル
３，４に電流を流して軸１を定位置に修正する制
御回路を有しており、完全な制御形磁気軸受を構
成するには、このような回路が軸方向の１回路と
径方向の上側及び下側の各２回路の合計５回路が
必要である。尚、図中の５は増幅器を示す。 For example, in a magnetic bearing that levitates and supports a shaft using magnetism, especially a controlled magnetic bearing, the position of the shaft 1 is detected by a non-contact displacement meter 2, and its output is It has a control circuit that corrects the shaft 1 to the fixed position by applying current to the electromagnetic coils 3 and 4 so that the A total of five circuits are required: one circuit in the direction and two circuits each in the upper and lower sides in the radial direction. Note that 5 in the figure indicates an amplifier.
ところで、このような制御形磁気軸受に於い
て、何らかの外乱が発生した場合に、その制御状
態を維持することが不可能となる場合がある。こ
のような状態が磁気軸受の異常状態であり、異常
が発生する場合、以下に述べる２通りの状況が考
えられる。 By the way, in such a controlled magnetic bearing, if some kind of disturbance occurs, it may become impossible to maintain the controlled state. Such a state is an abnormal state of the magnetic bearing, and when an abnormality occurs, the following two situations can be considered.
(1) 磁気軸受起動の際、制御電流不足等により、
軸を浮上させることができない場合
(2) 磁気軸受の軸が回転中に、制御系に外乱が加
わることにより制御系が発振を起こし、制御状
態を維持することができなくなつた場合
このような異常状態を検出する為、従来は多チ
ヤンネルのオシロスコープを各軸の変位計に接続
し、その信号を観測するか、異常の際に発生する
音や振動を観測者が直接判断する方法を用いてい
た。ところが、これだと非常に高価な多チヤンネ
ルのオシロスコープが必要であること、又、人間
が判断する場合は、異常の基準があいまいになる
こと等の理由により異常検出の方法として不適当
であつた。(1) When starting the magnetic bearing, due to insufficient control current, etc.
Cases in which the shaft cannot be levitated (2) When the control system oscillates due to disturbance applied to the control system while the shaft of the magnetic bearing is rotating, and the control system cannot be maintained. Conventionally, to detect abnormal conditions, a multi-channel oscilloscope is connected to a displacement meter on each axis and the signals are observed, or an observer directly determines the sound and vibration that occurs when an abnormality occurs. Ta. However, this method was not suitable as an anomaly detection method because it required an extremely expensive multi-channel oscilloscope, and the criteria for anomalies would be ambiguous if humans were to judge. .
この発明は上記従来技術の不具合に鑑み、これ
を解決したもので、変位計出力信号の上限と下限
を比較器にて取り出し、該比較器の出力にデジタ
ル処理を行うことにより異常を検出する方法を提
供する。 This invention solves the above-mentioned problems of the prior art, and is a method of detecting an abnormality by extracting the upper and lower limits of the displacement meter output signal using a comparator and digitally processing the output of the comparator. I will provide a.
以下この発明の構成を図面を参照して説明する
と次の通りである。 The configuration of the present invention will be explained below with reference to the drawings.
第２図はこの発明の一実施例を示すブロツク図
で、６は変位計、７は比較部、８はカウンタ、９
は矩形波発生部、１０はカウンタ、１１はホール
ド部、１２はリレードライバ、１３はリレーを
夫々示す。 FIG. 2 is a block diagram showing an embodiment of the present invention, in which 6 is a displacement meter, 7 is a comparison section, 8 is a counter, and 9 is a displacement meter.
10 is a counter, 11 is a hold unit, 12 is a relay driver, and 13 is a relay.
この発明は磁気軸受制御に用いている変位計６
の出力を取出し、これを複数個の比較器よりなる
比較部７に入力する。変位計６の出力信号は磁気
軸受の軸が制御位置にある時ゼロになるように設
定してあり、軸が制御位置から最も離れた時にプ
ラスまたはマイナスの最大値をとる。従つて、比
較部７は変位計６の出力信号の大きさに応じて動
作するから、変位計６の出力信号が最大となつた
時、比較部６の両端の比較器のうちいずれかが動
作する。次に、比較部７の両端の比較器の出力に
デジタル処理を行うことにより、異常の検出を行
う。以下、デジタル処理について説明する。 This invention is a displacement meter 6 used for magnetic bearing control.
The output is taken out and inputted to a comparison section 7 consisting of a plurality of comparators. The output signal of the displacement meter 6 is set to be zero when the shaft of the magnetic bearing is at the control position, and takes a plus or minus maximum value when the shaft is farthest from the control position. Therefore, since the comparator 7 operates according to the magnitude of the output signal of the displacement meter 6, when the output signal of the displacement meter 6 reaches the maximum, one of the comparators at both ends of the comparator 6 operates. do. Next, by performing digital processing on the outputs of the comparators at both ends of the comparing section 7, an abnormality is detected. Digital processing will be explained below.
先ず、磁気軸受起動の際、軸を浮上させること
ができなかつた場合、両端の比較器のうち一方が
動作し続ける為、その動作がある一定時間続いた
ことをカウンタ８により検出し、異常信号を発生
させる。 First, when starting the magnetic bearing, if the shaft cannot be levitated, one of the comparators at both ends continues to operate, so the counter 8 detects that the operation has continued for a certain period of time and issues an abnormal signal. to occur.
次に、磁気軸受の軸が回転中、制御系が外乱に
より発振した場合、両端の比較器が交互に動作す
る為、２つの比較器の出力を矩形波発生部９に入
力させて矩形波を発生させ、このように得られた
矩形波のサイクル数をカウンタ１０で数え、その
数が設定回数を上回つた時に異常信号を発生させ
る。 Next, when the control system oscillates due to disturbance while the shaft of the magnetic bearing is rotating, the comparators at both ends operate alternately, so the outputs of the two comparators are input to the square wave generator 9 to generate a square wave. The number of cycles of the rectangular wave thus obtained is counted by a counter 10, and when the number exceeds a set number of times, an abnormal signal is generated.
このようにカウンタ８及び１０で得られた異常
信号をホールド部１１で保持し、それをリレード
ライバ１２に入力してリレー１３を動作させ、電
源をOFFにする等の処置を自動的に行なわせ
る。 The abnormal signals obtained by the counters 8 and 10 are held in the hold unit 11, and are input to the relay driver 12 to operate the relay 13 and automatically take measures such as turning off the power. .
第３図は異常検出回路図で、Ｃは磁気軸受制御
に用いている変位計より取出した出力信号を入力
するｎ個の比較器で、ｎ個の分圧抵抗Ｒによつて
基準電圧を分圧して入力した出力信号と比較し、
変位計出力の大きさに応じて個々が動作する。即
ち、変位計出力は磁気軸受の軸が制御位置にある
時にゼロに、また、軸が制御位置から最も離れた
時にプラスまたはマイナスの最大値をとるように
設定してあり、変位計出力が最大値をとつた時、
両端の比較器C1，Cnのうちいずれかが動作され
る。１４は両端の比較器C1，Cnのうち一方の動
作時間を計るカウンタで、動作が一定時間以上続
いたことを検出すると異常信号を発生する。尚、
カウンタ１４はOR−NOT回路１５により両方の
比較器C1，Cnが動作した時にクリアされる。１
６は両端の比較器C1，Cnの出力を矩形波にさせ
るフリツプフロツプ回路、１７はフリツプフロツ
プ回路１６により得られた矩形波のサイクル数を
数えるカウンタで、その数が設定回数を上回つた
時に異常信号を発生する。１８はカウンタ１４及
び１７の異常信号をホールドするフリツプフロツ
プ回路で、異常信号をリレードライバ１９に入力
してリレ−２０を動作させる。２１はクロツクパ
ルスを発生するクロツク発生回路、２２，２３は
クロツク発生回路で発生したクロツクパルスを分
周してカウンタ１４及び１７に入力するカウンタ
である。 Figure 3 is an abnormality detection circuit diagram. and compare it with the input output signal.
Each operates according to the magnitude of the displacement meter output. In other words, the displacement meter output is set to zero when the shaft of the magnetic bearing is at the control position, and to take the maximum positive or negative value when the shaft is farthest from the control position, and the displacement meter output is set to the maximum value. When taking the value,
Either of the comparators C 1 and Cn at both ends is operated. A counter 14 measures the operation time of one of the comparators C 1 and Cn at both ends, and generates an abnormal signal when it detects that the operation has continued for a certain period of time or more. still,
The counter 14 is cleared by the OR-NOT circuit 15 when both comparators C 1 and Cn operate. 1
6 is a flip-flop circuit that converts the outputs of the comparators C 1 and Cn at both ends into a rectangular wave; 17 is a counter that counts the number of cycles of the rectangular wave obtained by the flip-flop circuit 16; when the number exceeds a set number, an error occurs. Generate a signal. A flip-flop circuit 18 holds abnormal signals from the counters 14 and 17, and inputs the abnormal signals to a relay driver 19 to operate a relay 20. Reference numeral 21 designates a clock generation circuit that generates clock pulses, and 22 and 23 designate counters that divide the frequency of the clock pulses generated by the clock generation circuit and input the frequency-divided clock pulses to counters 14 and 17.
以上説明したようにこの発明によれば、変位計
出力信号の上限と下限を比較器により取り出し、
該比較器の出力にデジタル処理を行つて異常を検
出するようにしたので、磁気軸受、静圧軸受等の
異常検出を自動的に行うことができ、また、異常
を検出するとリレーが動作する為、異常ランプ等
を点灯することにより異常を一目瞭然に確認する
ことができると共に、電源をOFFにする等の処
置を自動的に行なわせることにより大事故を未然
に防止することができる。 As explained above, according to the present invention, the upper and lower limits of the displacement meter output signal are extracted by the comparator,
Since the output of the comparator is digitally processed to detect abnormalities, it is possible to automatically detect abnormalities in magnetic bearings, static pressure bearings, etc. Also, when an abnormality is detected, a relay is activated. By lighting an abnormality lamp or the like, abnormalities can be clearly confirmed at a glance, and major accidents can be prevented by automatically taking measures such as turning off the power.
第１図は制御形電磁軸受の原理図、第２図はこ
の発明の異常検出方法の一実施例を示すブロツク
図、第３図は異常検出回路図である。
６……変位計、７……比較部、８……カウン
タ、９……矩形波発生部、１０……カウンタ、１
１……ホールド部、１２……リレードライバ、１
３……リレー。
FIG. 1 is a principle diagram of a controlled electromagnetic bearing, FIG. 2 is a block diagram showing an embodiment of the abnormality detection method of the present invention, and FIG. 3 is an abnormality detection circuit diagram. 6...Displacement meter, 7...Comparison section, 8...Counter, 9...Square wave generation section, 10...Counter, 1
1...Hold part, 12...Relay driver, 1
3...Relay.
Claims (1)
の出力信号で前記回転体を制御するものに於い
て、前記変位計の出力信号の上限及び下限を比較
器で取り出し、当該比較器の出力信号を矩形波に
変換し、カウンタで前記矩形波のサイクル数を計
数して、予め設定されたサイクル数と比較判定す
る異常検出方法。 ２ 回転体の半径方向位置を変位計で検出し、そ
の出力信号で前記回転体を制御するものに於い
て、前記変位計の出力信号の上限及び下限を比較
器で取り出し、どちらか一方の信号の動作時間を
カウンタで計測し、予め設定された時間継続した
ことを検出する異常検出方法。[Claims] 1. In a device in which the radial position of a rotating body is detected by a displacement meter and the rotating body is controlled by the output signal thereof, the upper and lower limits of the output signal of the displacement meter are extracted by a comparator. , an abnormality detection method that converts the output signal of the comparator into a rectangular wave, counts the number of cycles of the rectangular wave with a counter, and compares and determines the number of cycles with a preset number of cycles. 2. In a system in which the radial position of a rotating body is detected by a displacement meter and the rotating body is controlled by the output signal, the upper and lower limits of the output signal of the displacement meter are taken out by a comparator, and either one of the signals is An abnormality detection method that measures the operating time of the machine using a counter and detects when it continues for a preset period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21585682A JPS59106721A (en) | 1982-12-08 | 1982-12-08 | Detection of anomaly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21585682A JPS59106721A (en) | 1982-12-08 | 1982-12-08 | Detection of anomaly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59106721A JPS59106721A (en) | 1984-06-20 |
| JPS6151683B2 true JPS6151683B2 (en) | 1986-11-10 |
Family
ID=16679404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21585682A Granted JPS59106721A (en) | 1982-12-08 | 1982-12-08 | Detection of anomaly |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59106721A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841204A (en) * | 1987-10-07 | 1989-06-20 | Studer Philip A | Combination electric motor and magnetic bearing |
| JP4096113B2 (en) * | 1998-04-03 | 2008-06-04 | 株式会社ジェイテクト | Control type magnetic bearing device |
-
1982
- 1982-12-08 JP JP21585682A patent/JPS59106721A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59106721A (en) | 1984-06-20 |
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