JP2922575B2 - DC current controller for rectifier - Google Patents
DC current controller for rectifierInfo
- Publication number
- JP2922575B2 JP2922575B2 JP9854490A JP9854490A JP2922575B2 JP 2922575 B2 JP2922575 B2 JP 2922575B2 JP 9854490 A JP9854490 A JP 9854490A JP 9854490 A JP9854490 A JP 9854490A JP 2922575 B2 JP2922575 B2 JP 2922575B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- rectifier
- transformer
- control
- set value
- 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
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- Measurement Of Current Or Voltage (AREA)
- Rectifiers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、例えば直流大電流を必要とする電気化学
に用いられる整流装置に係り、整流装置の直流大電流の
検出精度を高めて安定した制御を営むための整流装置の
直流電流制御装置に関するものである。The present invention relates to a rectifier for use in, for example, an electrochemistry that requires a large DC current, and improves the detection accuracy of the DC large current of the rectifier to stabilize the rectifier. The present invention relates to a DC current control device of a rectifier for performing control.
電気化学用では直流大電流を必要とし、かつ生産量が
その直流大電流に比例するところから整流装置の直流電
流を検出し、設定値と比較の上、電流制御ユニットを介
して定電流制御を行なうのが一般的であり、このため、
直流大電流の検出は極めて重要となる。For electrochemical applications, a large DC current is required, and the DC current of the rectifier is detected when the production volume is proportional to the large DC current, and after comparing with the set value, the constant current control is performed via the current control unit. It is common to do
Detection of a large DC current is extremely important.
第２図は例えば特公昭53−40111号公報に示された従
来の整流装置の直流電流制御装置を示すもので、整流器
用変圧器（１）と整流器（２）で交流入力を直流に変換
し、負荷（３）に直流電流を供給する。この直流電流を
高精度の直流変流器（５）および制御部（４）にて検出
しその出力を直流電流計（７）で測定すると共に、絶縁
変換器（14）で制御に必要な信号レベルCDに変換し、設
定値REFと比較の上、電流制御ユニット（12）を介して
定電流制御を行なうように構成されている。FIG. 2 shows a DC current control device of a conventional rectifier disclosed in Japanese Patent Publication No. 53-40111, for example, in which a rectifier transformer (1) and a rectifier (2) convert an AC input into DC. And a DC current to the load (3). This DC current is detected by a high-precision DC current transformer (5) and a control unit (4), the output of which is measured by a DC ammeter (7), and a signal necessary for control by an insulation converter (14). It is configured to convert to a level CD, compare with a set value REF, and perform constant current control via a current control unit (12).
また、第３図は他の従来例による整流装置の電流制御
装置を示し、図において、（１），（２），（３）は第
２図と同様な整流器用変圧器、整流器および負荷を示
し、交流変流器（８）、補助変圧器（11）で整流器用変
圧器（１）の交流側電流を検出し、整流器（９）で整流
した出力を直流電流計（10）で測定すると共に、絶縁変
換器（13）の出力を設定値と比較し電流制御ユニット
（12）に入力するようにして第２図に示す直流変流器
（５）を不用といたものである。FIG. 3 shows another conventional rectifier current control device. In the figure, (1), (2) and (3) show the same rectifier transformer, rectifier and load as in FIG. The AC current (8) and the auxiliary transformer (11) detect the AC side current of the rectifier transformer (1), and the output rectified by the rectifier (9) is measured by the DC ammeter (10). At the same time, the output of the insulation converter (13) is compared with a set value and input to the current control unit (12) so that the DC current transformer (5) shown in FIG. 2 is not required.
従来の整流装置の直流電流制御装置は以上のように構
成されているので、第２図に示す如く高精度の直流変流
器（５）を使用した方式では、ホール素子などの電子部
品を多数使用しているため、故障の確率が高く、また、
第３図に示す如く上記直流変流器（５）を不用とした方
式では、整流器用変圧器（１）の励磁電流などの影響を
受けて検出精度が悪くなるなどの問題点があった。Since the conventional DC current control device of the rectifier is configured as described above, in the system using the high-precision DC current transformer (5) as shown in FIG. Because of the use, the probability of failure is high,
As shown in FIG. 3, the method in which the DC current transformer (5) is not used has a problem that the detection accuracy is deteriorated due to the influence of the exciting current of the rectifier transformer (1).
この発明は上記のような問題点を解消するためになさ
れたもので、信頼性及び検出精度を高めることができる
と共に、安定した制御ができる整流装置の直流電流制御
装置を得ることを目的とする。The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a DC current control device of a rectifier capable of improving reliability and detection accuracy and performing stable control. .
この発明に係る整流装置の直流電流制御装置は、整流
装置から出力される直流電流を高精度に検出するための
ホール素子などの電子部品を多数使用した直流変流器を
有する第１の系と、上記整流装置へ入力される交流側電
流を計測して整流装置の直流電流を検出する第２の系を
備えると共に、上記第１の系により検出される直流電流
と上記第２の系により検出される直流電流とを比較し、
その比較偏差が設定値以下のときは上記第１の系による
直流電流の検出に基づいて定電流制御し、上記比較偏差
が上記設定値を越えたときには整流装置の運転を停止す
ることなく、交流側電流を計測して整流装置の直流電流
を検出する第２の系に切換え、安定した定電流制御を行
う切換手段を備えたものである。A DC current control device for a rectifier according to the present invention includes a first system having a DC current transformer using a large number of electronic components such as a Hall element for detecting a DC current output from the rectifier with high accuracy. A second system for measuring a DC current of the rectifier by measuring an AC side current input to the rectifier, and detecting a DC current detected by the first system and a DC current detected by the second system. Compared with the DC current
When the comparison deviation is equal to or less than the set value, constant current control is performed based on the detection of the DC current by the first system. When the comparison deviation exceeds the set value, the operation of the rectifier is stopped without stopping the rectifier. It is provided with a switching means for switching to the second system for measuring the side current and detecting the DC current of the rectifier, and performing stable constant current control.
この発明においては、直流変流器の故障時に整流装置
の運転を停止することなく、整流器用変圧器の交流側電
流を計測して整流装置の直流電流を検出する方式に自動
的に切換え、安定した制御ができるようになされてい
る。In the present invention, the system is automatically switched to a method of detecting the DC current of the rectifier by measuring the AC side current of the rectifier transformer without stopping the operation of the rectifier when the DC current transformer fails. Control has been made.
〔実施例〕 以下、この発明の一実施例を第１図に基づいて説明す
る。第２図及び第３図と同一部分は同一符号を付して示
す第１図において、本実施例における整流装置の直流電
流制御装置は、第２図に示す如く、整流装置（１）の直
流電流の検出に基づいて出力を制御する制御系と、第３
図に示す如く、整流装置（１）の交流側電流の検出に基
づいて出力を制御する制御系の両者の構成を備えると共
に、絶縁変換器（13）と（14）の偏差が設定値以内の時
に閉じる接点（15）と絶縁変換器（13）と（14）の偏差
が設定値を超えた時に閉じる接点（16）を備えて、直流
変流器（５）の故障時に整流装置の運転を停止すること
なく、整流器用変圧器（１）の交流側電流を計測して整
流装置（１）の直流電流を検出する方式に自動的に切換
え、安定した制御ができるようになされている。Embodiment An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same parts as in FIGS. 2 and 3 are designated by the same reference numerals. In FIG. 1, the DC current control device of the rectifier in this embodiment is, as shown in FIG. A control system for controlling the output based on the detection of the current;
As shown in the figure, both of the control system for controlling the output based on the detection of the AC side current of the rectifier (1) are provided, and the deviation between the insulation converters (13) and (14) is within a set value. A contact (16) that closes when the deviation between the contact (15) and the insulation converters (13) and (14) exceeds a set value when the DC current transformer (5) fails. Without stopping, the system is automatically switched to a method of measuring the AC current of the rectifier transformer (1) and detecting the DC current of the rectifier (1), thereby enabling stable control.
すなわち、第１図構成において、通常の運転では、高
精度の直流変換器（５）及び制御部（４）で整流装置の
直流電流を高精度に検出し、その出力を絶縁変換器（1
4）を介して電流制御ユニット（12）に与えて精度の高
い定電流制御を行なう。一方、高精度の直流変流器
（５）が故障した時は、絶縁変換器（13）と（14）の出
力を図示していない比較器により常時比較しておき、そ
の偏差が設定値を超えたことで故障の判定を行ない、直
ちに接点（16）を閉じ、交流変流器（８）、補助変圧器
（11）で検出し整流器（９）で整流した出力を絶縁変換
器（13）を介して電流制御ユニット（12）に与え、通常
の運転より若干精度が劣るものの安定した制御を行う。That is, in the configuration shown in FIG. 1, during normal operation, the DC current of the rectifier is detected with high accuracy by the high-precision DC converter (5) and the control unit (4), and the output is isolated by the insulation converter (1
The current is supplied to the current control unit (12) via 4) to perform highly accurate constant current control. On the other hand, when the high-precision DC current transformer (5) fails, the outputs of the insulation converters (13) and (14) are constantly compared by a comparator (not shown), and the deviation is set to the set value. Failure is judged by exceeding, the contact (16) is closed immediately, and the output detected by the AC current transformer (8) and the auxiliary transformer (11) and rectified by the rectifier (9) is insulated (13). To the current control unit (12) to perform stable control, although the accuracy is slightly lower than in normal operation.
以上のように、この発明によれば、整流装置から出力
される直流電流の高精度に検出するための直流変流器を
有する第１の系と、上記整流装置へ入力される交流側電
流を計測して整流装置の直流電流を検出する第２の系を
備え、切換手段により、通常は上記第１の系による直流
電流の検出に基づいて定電流制御し、高精度の直流変流
器が故障した場合には第２の系に切換えて整流装置の運
転を停止することなく直流変流器の故障に拘わらずかつ
整流器や負荷に悪影響を及ぼすことなく安定した制御行
うことが出来る。As described above, according to the present invention, the first system having the DC current transformer for accurately detecting the DC current output from the rectifier, and the AC-side current input to the rectifier, A second system for measuring and detecting the DC current of the rectifier is provided, and the switching means normally controls the constant current based on the detection of the DC current by the first system. In the event of a failure, stable control can be performed without switching to the second system and stopping the operation of the rectifier, regardless of the failure of the DC current transformer, and without adversely affecting the rectifier and load.
第１図はこの発明の一実施例による構成図、第２図と第
３図は従来例を示し、第２図は高精度の直流変流器を使
用した構成図、第３図は直流変流器を不用とした構成図
をそれぞれ示す。 図中、（１）は整流器用変圧器、（２）は整流器、
（３）は負荷、（５）は直流変換器、（12）は定電流ユ
ニット、（８）は交流変流器。 なお、各図中、同一符号は同一または相当部分を示す。FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 show a conventional example, FIG. 2 is a block diagram using a high-precision DC current transformer, and FIG. The configuration diagrams without the flow device are shown. In the figure, (1) is a rectifier transformer, (2) is a rectifier,
(3) is a load, (5) is a DC converter, (12) is a constant current unit, and (8) is an AC current transformer. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
に検出するためのホール素子などの電子部品を多数使用
した直流変流器を有する第１の系と、上記整流装置へ入
力される交流側電流を計測して整流装置の直流電流を検
出する第２の系を備えると共に、上記第１の系により検
出される直流電流と上記第２の系により検出される直流
電流とを比較し、その比較偏差が設定値以下のときは上
記第１の系による直流電流の検出に基づいて定電流制御
し、上記比較偏差が上記設定値を越えたときには整流装
置の運転を停止することなく、交流側電流を計測して整
流装置の直流電流を検出する第２の系に切換え、安定し
た定電流制御を行う切換手段を備えたことを特徴とする
整流装置の直流制御装置。1. A first system having a DC current transformer using a large number of electronic components such as a Hall element for detecting a DC current output from a rectifier with high accuracy, and input to the rectifier. A second system for measuring the AC side current and detecting the DC current of the rectifier is provided, and the DC current detected by the first system is compared with the DC current detected by the second system. When the comparison deviation is equal to or less than the set value, the constant current control is performed based on the detection of the DC current by the first system. When the comparison deviation exceeds the set value, the operation of the rectifier is not stopped. A DC control device for a rectifier, comprising: a switching unit that switches to a second system that measures an AC current and detects a DC current of the rectifier, and performs stable constant current control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9854490A JP2922575B2 (en) | 1990-04-13 | 1990-04-13 | DC current controller for rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9854490A JP2922575B2 (en) | 1990-04-13 | 1990-04-13 | DC current controller for rectifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04266A JPH04266A (en) | 1992-01-06 |
| JP2922575B2 true JP2922575B2 (en) | 1999-07-26 |
Family
ID=14222631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9854490A Expired - Lifetime JP2922575B2 (en) | 1990-04-13 | 1990-04-13 | DC current controller for rectifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2922575B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5264071A (en) * | 1990-06-13 | 1993-11-23 | General Electric Company | Free standing diamond sheet and method and apparatus for making same |
| JP5509957B2 (en) | 2010-03-18 | 2014-06-04 | 株式会社リコー | Image processing apparatus, image processing method, and image forming apparatus |
| JP5545012B2 (en) | 2010-05-07 | 2014-07-09 | 株式会社リコー | Image processing apparatus and image processing method |
| JP5499894B2 (en) | 2010-05-14 | 2014-05-21 | 株式会社リコー | Image processing apparatus and image processing method |
-
1990
- 1990-04-13 JP JP9854490A patent/JP2922575B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04266A (en) | 1992-01-06 |
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