JPH0552907B2 - - Google Patents
Info
- Publication number
- JPH0552907B2 JPH0552907B2 JP60107959A JP10795985A JPH0552907B2 JP H0552907 B2 JPH0552907 B2 JP H0552907B2 JP 60107959 A JP60107959 A JP 60107959A JP 10795985 A JP10795985 A JP 10795985A JP H0552907 B2 JPH0552907 B2 JP H0552907B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- control circuit
- motor
- resistor
- drive circuit
- 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
- 238000009413 insulation Methods 0.000 claims description 29
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000007858 starting material Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、モータ等の動機器を駆動する駆動回
路並びにその制御回路の絶縁状態を検知する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive circuit for driving a moving device such as a motor, and a method for detecting the insulation state of the control circuit.
［背景技術とその問題点］
モータ駆動回路並びにその制御回路の絶縁抵抗
は、絶縁抵抗測定器を用いて測定され、この測定
値により絶縁状態の良否が判別されていた。しか
も、絶縁抵抗の測定は、通常、年に１回程度測定
されるだけであるから、その間比較的長期にわた
り絶縁状態を確認できないでいた。[Background Art and Problems Therewith] The insulation resistance of a motor drive circuit and its control circuit has been measured using an insulation resistance measuring device, and the quality of the insulation state has been determined based on the measured value. Moreover, since the insulation resistance is normally measured only once a year, the insulation state cannot be confirmed for a relatively long period of time.
このため、例えば起動待機中にモータまたはケ
ーブルの絶縁状態が低下した場合、起動と同時に
漏電遮断器が作動し、装置の緊急停止に至る恐れ
があつた。 For this reason, for example, if the insulation state of the motor or cable deteriorates while waiting for startup, the earth leakage breaker will operate at the same time as startup, leading to an emergency stop of the device.
このようことから、モータ等の動機器回路の絶
縁抵抗を簡易にかつ常時監視できる方法が望まれ
ていた。 For this reason, there has been a desire for a method that can easily and constantly monitor the insulation resistance of a circuit of a moving device such as a motor.
［発明の目的］
ここに、本発明の目的は、このような欠点を解
消すべくなされたもので、モータ等の動機器停止
中に絶縁抵抗測定器を用いることなく、動機器の
駆動回路および制御回路の絶縁抵抗を常時監視す
ることができ、絶縁状態不良によるトラブルを未
然に防止できる絶縁状態検知方法を提供すること
にある。[Object of the Invention] An object of the present invention is to solve the above-mentioned drawbacks, and to provide a method for measuring the drive circuit of a moving equipment such as a motor without using an insulation resistance measuring device while the moving equipment such as a motor is stopped. An object of the present invention is to provide an insulation state detection method that can constantly monitor the insulation resistance of a control circuit and prevent troubles due to poor insulation conditions.
［問題点を解決するための手段および作用］
そのため、本発明では、制御トランスの２次側
に、整流器を介して、動機器の駆動回路を開閉す
る制御回路およびコンデンサを互いに並列に接続
した動機器回路において、前記制御トランスの２
次側をコンデンサと抵抗との並列回路を介して接
地するとともに、動機器の駆動回路が開かれてい
るとき前記制御回路と動機器側とを抵抗を介して
接続した状態において、前記接地された抵抗の電
圧を常時測定し、この電圧から前記動機器の駆動
回路および制御回路の絶縁抵抗を求めることによ
り、上記目的を達成しようとするものである。[Means and effects for solving the problem] Therefore, in the present invention, a control circuit for opening and closing the drive circuit of the moving equipment and a capacitor are connected in parallel to each other on the secondary side of the control transformer via a rectifier. In the equipment circuit, two of the control transformers
The next side is grounded through a parallel circuit of a capacitor and a resistor, and when the drive circuit of the moving equipment is open, the control circuit and the moving equipment side are connected through the resistor. The above objective is achieved by constantly measuring the voltage of the resistor and determining the insulation resistance of the drive circuit and control circuit of the moving equipment from this voltage.
［実施例］
第１図は本発明の方法を適用した回路一実施例
を示している。同図において、制御トランス１に
は、その１次側に交流電源２が接続されていると
ともに、２次側に整流器３および開閉器５を介し
て、コンデンサ８と抵抗９との並列回路１０およ
び抵抗１１が順次直列に接続されている。前記開
閉器５は、コントロールセンタ等に設けられた操
作ハンドルによつて開閉されるようになつてい
る。また、前記並列回路１０および抵抗１１の直
列回路に対しては、モータ１４の駆動回路１３を
開閉するスタータ制御回路４が接続されている。
スタータ制御回路４には、メータスタンド等によ
り遠隔操作される２つのスイツチ６Ａ，６Ｂと、
これらスイツチ６Ａ，６Ｂに直列に接続されたリ
レー７と、前記スイツチ６Ａに並列に接続された
前記リレー７のリレー接点７Ａとが含まれてい
る。[Embodiment] FIG. 1 shows an embodiment of a circuit to which the method of the present invention is applied. In the figure, a control transformer 1 has an AC power supply 2 connected to its primary side, and a parallel circuit 10 of a capacitor 8 and a resistor 9 connected to its secondary side via a rectifier 3 and a switch 5. Resistors 11 are successively connected in series. The switch 5 is opened and closed by an operation handle provided at a control center or the like. Further, a starter control circuit 4 that opens and closes a drive circuit 13 of a motor 14 is connected to the parallel circuit 10 and the series circuit of the resistor 11.
The starter control circuit 4 includes two switches 6A and 6B that are remotely controlled by a meter stand or the like.
A relay 7 is connected in series to the switches 6A and 6B, and a relay contact 7A of the relay 7 is connected in parallel to the switch 6A.
また、前記開閉器５とスタータ制御回路４との
間には、前記リレー７のリレー接点７Ｂおよび抵
抗１２を介してモータ１４を駆動させるモータ駆
動回路１３が接続されている。モータ駆動回路１
３には、モータ１４と電源１６とを接続する３本
の接続ケーブル１５の途中に前記リレー７のリレ
ー接点７Ｃが挿入されている。 Further, a motor drive circuit 13 for driving a motor 14 is connected between the switch 5 and the starter control circuit 4 via the relay contact 7B of the relay 7 and a resistor 12. Motor drive circuit 1
3, a relay contact 7C of the relay 7 is inserted in the middle of three connecting cables 15 that connect the motor 14 and the power source 16.
また、前記制御トランス１の２次側の一端は、
交流バイパス用のコンデンサ２１と抵抗２２との
並列回路を介して接地されている。抵抗２２の両
端には、電圧計２３が並列に接続されている。 Moreover, one end of the secondary side of the control transformer 1 is
It is grounded via a parallel circuit of an AC bypass capacitor 21 and a resistor 22. A voltmeter 23 is connected in parallel to both ends of the resistor 22 .
従つて、制御トランス１の２次側に所定の電圧
が発生し、かつ開閉器５が閉じられると、２次側
電流は整流器３で整流された後、コンデンサ８に
充電される。 Therefore, when a predetermined voltage is generated on the secondary side of the control transformer 1 and the switch 5 is closed, the secondary current is rectified by the rectifier 3 and then charged into the capacitor 8.
ここで、スイツチ６Ａがオフの状態、つまりリ
レー７が励磁されていない状態では、リレー接点
７Ｂが閉のままであるから、モータ駆動回路１３
またはスタータ制御回路４の絶縁状態が不良のと
きには、直流漏洩電流が抵抗２２を流れるの
で、その抵抗２２の両端の電圧Ｖを電圧計２３で
測定すれば、抵抗２２の抵抗値をＲとしたとき、
直流漏洩電流ＩはＶ／Ｒで表わされる。 Here, when the switch 6A is off, that is, when the relay 7 is not energized, the relay contact 7B remains closed, so the motor drive circuit 13
Alternatively, when the insulation state of the starter control circuit 4 is poor, DC leakage current flows through the resistor 22, so if the voltage V across the resistor 22 is measured with the voltmeter 23, the resistance value of the resistor 22 is R. ,
The DC leakage current I is expressed as V/R.
いま、制御トランス１の２次側に発生する電圧
をｅ［Ｖ］とすると、モータ駆動回路１３および
スタータ制御回路４には、それぞれ対地間に約√
２ｅ［Ｖ］の直流電圧が印加されるので、モータ
駆動回路１３およびスタータ制御回路４の絶縁抵
抗Rgは（√２eR／Ｖ）−Ｒで求めることができ
る。このようにして、モータ１４の駆動停止中に
おいて、モータ駆動回路１３およびスタータ制御
回路４の絶縁抵抗Rgを常時監視することができ
る。 Now, if the voltage generated on the secondary side of the control transformer 1 is e [V], the motor drive circuit 13 and the starter control circuit 4 each have a voltage of approximately √
Since a DC voltage of 2e[V] is applied, the insulation resistance Rg of the motor drive circuit 13 and the starter control circuit 4 can be determined by (√2eR/V)-R. In this way, the insulation resistance Rg of the motor drive circuit 13 and the starter control circuit 4 can be constantly monitored while the motor 14 is stopped.
一方、メータスタンド等によつてスタータ制御
回路４のスイツチ６Ａをオンすると、リレー７が
励磁される。リレー７が励磁されると、リレー接
点７Ａが閉じるので、リレー７が自己保持され
る。同時に、リレー接点７Ｃが閉じるので、モー
タ１４が駆動される。また、リレー接点７Ｂが開
くので、スタータ制御回路４がモータ駆動回路１
３の電源１６から切離される。従つて、この状態
において、抵抗２２の両端の抵抗値を測定すれ
ば、上述した手順によつてスタータ制御回路４の
みの絶縁抵抗を監視することができる。 On the other hand, when the switch 6A of the starter control circuit 4 is turned on using a meter stand or the like, the relay 7 is energized. When the relay 7 is energized, the relay contact 7A closes, so that the relay 7 is self-held. At the same time, relay contact 7C closes, so motor 14 is driven. Also, since the relay contact 7B opens, the starter control circuit 4 is connected to the motor drive circuit 1.
3 is disconnected from the power supply 16. Therefore, in this state, by measuring the resistance values across the resistor 22, the insulation resistance of only the starter control circuit 4 can be monitored using the above-described procedure.
従つて、本実施例によれば、モータ１４の停止
中において、絶縁抵抗測定器を用いることなく、
モータ駆動回路１３およびスタータ制御回路４の
絶縁抵抗を常監視することができる。そのため、
モータ１４の起動待機中において、モータ１４ま
たはケーブル１５の絶縁状態低下によるトラブル
を未然に防止できる。 Therefore, according to this embodiment, while the motor 14 is stopped, the insulation resistance measurement device can be used without using the insulation resistance measuring device.
The insulation resistance of the motor drive circuit 13 and starter control circuit 4 can be constantly monitored. Therefore,
While waiting for the motor 14 to start, troubles due to deterioration of the insulation state of the motor 14 or the cable 15 can be prevented.
ここで、いずれかの絶縁抵抗が不良の場合、モ
ータ駆動回路１３をスタータ制御回路４から切離
せば、スタータ制御回路４の絶縁抵抗を求めるこ
とができる。この場合の測定は、モータ１４の駆
動中に行なうことができる。従つて、スタータ制
御回路４の絶縁状態を作業の支障となることな
く、かつ任意時に確認することができる。 Here, if any of the insulation resistances is defective, the insulation resistance of the starter control circuit 4 can be determined by disconnecting the motor drive circuit 13 from the starter control circuit 4. The measurement in this case can be performed while the motor 14 is being driven. Therefore, the insulation state of the starter control circuit 4 can be checked at any time without interfering with the work.
［発明の効果］
以上の通り、本発明によれば、モータ等の動機
器停止中に絶縁抵抗測定器を用いることなく、動
機器の駆動回路および制御回路の絶縁抵抗を常時
監視することができる動機器回路の絶縁状態検知
方法を提供することができる。[Effects of the Invention] As described above, according to the present invention, the insulation resistance of the drive circuit and control circuit of a moving device can be constantly monitored without using an insulation resistance measuring device while the moving device such as a motor is stopped. A method for detecting an insulation state of a dynamic device circuit can be provided.
図は本発明の方法を適用した回路の一実施例を
示す回路図である。
１……制御トランス、３……整流器、４……ス
タータ制御回路、８……コンデンサ、１２……抵
抗、１３……駆動回路としてのモータ駆動回路、
１４……動機器としてのモータ、１５……接続ケ
ーブル、１６……電源、２１……コンデンサ、２
２……抵抗、２３……電圧計。
The figure is a circuit diagram showing an embodiment of a circuit to which the method of the present invention is applied. DESCRIPTION OF SYMBOLS 1... Control transformer, 3... Rectifier, 4... Starter control circuit, 8... Capacitor, 12... Resistor, 13... Motor drive circuit as a drive circuit,
14... Motor as a moving device, 15... Connection cable, 16... Power supply, 21... Capacitor, 2
2...Resistance, 23...Voltmeter.
Claims (1)
動機器の駆動回路を開閉する制御回路およびコン
デンサを互いに並列に接続した動機器回路におい
て、前記制御トランスの２次側をコンデンサと抵
抗との並列回路を介して接地するとともに、前記
動機器の駆動回路が開かれているとき前記制御回
路と動機器側とを抵抗を介して接続した状態にお
いて、前記接地された抵抗の電圧を常時測定し、
この電圧から前記動機器の駆動回路および制御回
路の絶縁抵抗を求めることを特徴とする動機器回
路の絶縁状態検知方法。1 On the secondary side of the control transformer, via a rectifier,
In a moving equipment circuit in which a control circuit for opening and closing a driving circuit of a moving equipment and a capacitor are connected in parallel with each other, the secondary side of the control transformer is grounded through a parallel circuit of a capacitor and a resistor, and always measuring the voltage of the grounded resistor in a state where the control circuit and the moving equipment side are connected via a resistor when the circuit is open;
A method for detecting an insulation state of a moving equipment circuit, characterized in that the insulation resistance of a drive circuit and a control circuit of the moving equipment is determined from this voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60107959A JPS61265581A (en) | 1985-05-20 | 1985-05-20 | Method for detecting insulating state of movable machinery circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60107959A JPS61265581A (en) | 1985-05-20 | 1985-05-20 | Method for detecting insulating state of movable machinery circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61265581A JPS61265581A (en) | 1986-11-25 |
| JPH0552907B2 true JPH0552907B2 (en) | 1993-08-06 |
Family
ID=14472400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60107959A Granted JPS61265581A (en) | 1985-05-20 | 1985-05-20 | Method for detecting insulating state of movable machinery circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61265581A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100403964B1 (en) * | 2001-09-19 | 2003-10-30 | 서장흠 | Apparatus for measuring insulation resistance of motor |
| JP5161187B2 (en) * | 2009-10-15 | 2013-03-13 | 株式会社日立ビルシステム | Elevator insulation resistance measurement method |
-
1985
- 1985-05-20 JP JP60107959A patent/JPS61265581A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61265581A (en) | 1986-11-25 |
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