JPH027279B2 - - Google Patents
Info
- Publication number
- JPH027279B2 JPH027279B2 JP56134176A JP13417681A JPH027279B2 JP H027279 B2 JPH027279 B2 JP H027279B2 JP 56134176 A JP56134176 A JP 56134176A JP 13417681 A JP13417681 A JP 13417681A JP H027279 B2 JPH027279 B2 JP H027279B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- motor
- motors
- monitoring
- group
- 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
- 238000012544 monitoring process Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 description 14
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Description
【発明の詳細な説明】
本発明は、同一仕様の多数台電動機の運転状態
を監視するものに係り、電動機群の中に異常電動
機があるか否かを監視する場合に好適な電動機の
運転状態監視方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to monitoring the operating status of a large number of electric motors having the same specifications, and is suitable for monitoring the operating status of a large number of electric motors with the same specifications, and is suitable for monitoring whether there is an abnormal motor in a group of electric motors. Regarding monitoring methods.
電動機および電動機により駆動される機器の異
常を監視するため、電動機電流を計測することは
一般に行なわれていることである。 2. Description of the Related Art Measuring motor current is a common practice in order to monitor abnormalities in electric motors and devices driven by the electric motors.
しかしながら、電動機の台数が非常の多い場合
には、電流検出部、異常判定回路部および表示部
が電動機台数と同じだけ必要であり、保守性、経
済性の点で非常に不利となる場合もある。 However, when there are a large number of motors, the same number of current detection units, abnormality determination circuits, and display units as the number of motors are required, which may be very disadvantageous in terms of maintainability and economy. .
本発明の目的は、電流検出部または異常判定回
路部の数を少なくし、多数台電動機の運転状態監
視を経済的に行なう方法を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a method for economical monitoring of operating conditions of multiple electric motors by reducing the number of current detection units or abnormality determination circuit units.
本発明は、電源回路の接地を検出する場合に用
いられる零相変流器の原理に着目し、監視グルー
プ内電動機の電流計測を行なう相（Ｒ、Ｓ、Ｔ）
を異なる相にて行なうことにより、電流の検出部
および異常判定回路部の数を減らすものである。 The present invention focuses on the principle of a zero-phase current transformer used to detect the grounding of a power supply circuit, and the present invention focuses on the principle of a zero-phase current transformer used to detect the grounding of a power supply circuit.
By performing this in different phases, the number of current detection units and abnormality determination circuit units is reduced.
以下、本発明の詳細を第１図に示す実施例によ
つて説明する。本図は一監視グループに対する部
分のみを図示してある。 The details of the present invention will be explained below with reference to an embodiment shown in FIG. This figure shows only the part for one monitoring group.
電源母線より開閉器１を介して電動機２へ電力
が供給される。 Electric power is supplied from the power bus through the switch 1 to the electric motor 2 .
同一監視グループ内の電動機２の電流は、電動
機２−１のＲ相、電動機２−２のＳ相、電動機２
−３のＴ相を１台の変流器３にて和算した形で計
測する構成にしてある。 The current of the motor 2 in the same monitoring group is the R phase of the motor 2-1, the S phase of the motor 2-2, and the current of the motor 2
-3 T phases are summed and measured using one current transformer 3.
通常の運転状態に於いては、電動機２−１〜２
−３は同一仕様であるため、電動機電流は、ほぼ
同一の電流値となつている。電動機電流は第２図
に示すごとく、電動機２−１の電流I1、電動機２
−２の電流2、電動機２−３の電流I3はそれぞ
れ120℃の位相差をもつている。 In normal operating conditions, electric motors 2-1 to 2
-3 have the same specifications, so the motor currents have almost the same current value. As shown in Fig. 2, the motor current is the current I 1 of the motor 2-1, the motor 2
The current 2 of the motor 2-2 and the current I3 of the motor 2-3 each have a phase difference of 120°C.
したがつて、異常のない通常状態においては、
変換器３を介して異常判定回路４へ流れる電流は
ほとんど零に近い値である。 Therefore, under normal conditions without abnormalities,
The current flowing through the converter 3 to the abnormality determination circuit 4 has a value close to zero.
一方、電動機２の中に異常が発生すると、その
電動機電流が変化するため、その電流変化分だけ
異常判定回路４へ電流が流れ、異常を検知するこ
とができる。 On the other hand, when an abnormality occurs in the electric motor 2, the motor current changes, so that a current corresponding to the current change flows to the abnormality determination circuit 4, and the abnormality can be detected.
上記した本発明の実施例によれば、電動機三台
に対し、変流器および異常判定回路を各一台ずつ
設けることにより、三台の電動機のうちいずれか
が異常となつたことを検出することが可能であ
る。 According to the embodiment of the present invention described above, by providing one current transformer and one abnormality determination circuit for each of the three electric motors, it is possible to detect that one of the three electric motors has become abnormal. Is possible.
第３図では、変流器３を電動機２毎に一台ずつ
設け、異常判定回路４を一台設ける構成の場合を
示す。 FIG. 3 shows a configuration in which one current transformer 3 is provided for each motor 2 and one abnormality determination circuit 4 is provided.
この場合には、各変流器の二次側を直列に配線
することにより同様の検出が可能であり部品配置
および配線上、一つの変流器にまとめることがむ
ずかしい場合には効果的である。 In this case, similar detection is possible by wiring the secondary sides of each current transformer in series, which is effective when it is difficult to combine them into one current transformer due to component layout and wiring. .
第１図および第３図では、電動機一台の電流計
測を行なうことで図示しているが、一台の電動機
の部分を複数台の電動機に置き換えた構成とする
こともできる。この場合には、さらに電流検出部
（変流器）および異常判定回路部の数を減らすこ
とが可能である。 Although FIGS. 1 and 3 illustrate the current measurement of one electric motor, it is also possible to have a configuration in which one electric motor is replaced with a plurality of electric motors. In this case, it is possible to further reduce the number of current detection sections (current transformers) and abnormality determination circuit sections.
開閉器１は、変流器３に対し電動機２と反対側
に図示しているが、開閉器１が電動機２側にあつ
ても問題ない。 Although the switch 1 is shown on the opposite side of the electric motor 2 with respect to the current transformer 3, there is no problem even if the switch 1 is on the electric motor 2 side.
本発明によれば、電流検出部および異常判定回
路部の数量を電動機台数に比べ大幅に減少させる
ことができ、経済的な監視を行なうことが可能と
なる。 According to the present invention, the number of current detection sections and abnormality determination circuit sections can be significantly reduced compared to the number of electric motors, making it possible to carry out economical monitoring.
第１図及び第３図は、本発明の一実施例を示す
回路図であり、第２図は、電流の変化状況を説明
するものである。
１……開閉器、２……電動機、３……変流器
（電流検出部）、４……異常判定回路。
FIGS. 1 and 3 are circuit diagrams showing one embodiment of the present invention, and FIG. 2 is a diagram illustrating changes in current. 1... Switch, 2... Electric motor, 3... Current transformer (current detection section), 4... Abnormality determination circuit.
Claims (1)
同一仕様の多数台電動機の運転状態監視を、電動
機電流を検出し、その検出信号にて監視するもの
において、監視単位が三の倍数の電動機台数とな
る様設定し、さらに、監視単位内を三等分の電動
機グループに分割し、各グループの電流を異なる
電源相で計測し、これらの電流の和算を行なう様
構成することにより、監視単位としてまとめられ
た電動機群の運転状態を監視することを特徴とす
る電動機の運転状態監視方式。1 The number of motors in which the monitoring unit is a multiple of three, where the operating status of multiple motors with the same specifications that are connected to a common three-phase power supply line and driven is monitored by detecting the motor current and using the detection signal. Furthermore, by dividing the monitoring unit into three equal motor groups, measuring the current of each group in a different power supply phase, and summing these currents, the monitoring unit can be A motor operating state monitoring method characterized by monitoring the operating state of a group of motors grouped together as a group of motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56134176A JPS5836192A (en) | 1981-08-28 | 1981-08-28 | Operative state monitoring system for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56134176A JPS5836192A (en) | 1981-08-28 | 1981-08-28 | Operative state monitoring system for motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5836192A JPS5836192A (en) | 1983-03-03 |
| JPH027279B2 true JPH027279B2 (en) | 1990-02-16 |
Family
ID=15122214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56134176A Granted JPS5836192A (en) | 1981-08-28 | 1981-08-28 | Operative state monitoring system for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836192A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50155951A (en) * | 1974-06-06 | 1975-12-16 |
-
1981
- 1981-08-28 JP JP56134176A patent/JPS5836192A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50155951A (en) * | 1974-06-06 | 1975-12-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5836192A (en) | 1983-03-03 |
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