JPH09190232A - Voltage stabilized power supply - Google Patents
Voltage stabilized power supplyInfo
- Publication number
- JPH09190232A JPH09190232A JP169796A JP169796A JPH09190232A JP H09190232 A JPH09190232 A JP H09190232A JP 169796 A JP169796 A JP 169796A JP 169796 A JP169796 A JP 169796A JP H09190232 A JPH09190232 A JP H09190232A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- circuit
- reference voltage
- control 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.)
- Withdrawn
Links
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
(57)【要約】
【課題】 基準電圧発生回路の出力を安定させて安定し
た直流電圧を得ることができる電圧安定化電源を提供す
ること。
【解決手段】 電圧制御回路１の電源投入時には出力電
圧検出回路６によりスイッチＳがＡ側に倒され、基準電
圧発生回路２は整流回路の出力により立ち上げられて基
準電圧Ｖａを発生する。この基準電圧発生回路２の出力
Ｖａと、前記電圧制御回路１の出力電圧Ｖｏを検出した
帰還回路３の出力Ｖｏ´は誤差アンプ４に送られ、誤差
アンプ４はそれらの出力の差を増幅して電圧制御回路１
に送るため、フィードバック制御が行なわれる。電源投
入からｔ1 後に出力電圧Ｖｏが前記所定電圧ＶL になる
と、出力電圧検出回路６によりスイッチＳがＢ側に倒さ
れて基準電圧発生回路２は電圧制御回路１の出力により
駆動される。
(57) Abstract: A voltage stabilized power supply capable of stabilizing the output of a reference voltage generating circuit to obtain a stable DC voltage. When a power source of a voltage control circuit 1 is turned on, a switch S is turned to an A side by an output voltage detection circuit 6, and a reference voltage generation circuit 2 is activated by an output of a rectifier circuit to generate a reference voltage Va. The output Va of the reference voltage generating circuit 2 and the output Vo 'of the feedback circuit 3 which detects the output voltage Vo of the voltage control circuit 1 are sent to the error amplifier 4, and the error amplifier 4 amplifies the difference between these outputs. Voltage control circuit 1
Feedback control is performed to send to the. When the output voltage Vo from the power-on after t 1 becomes a predetermined voltage V L, the reference voltage generating circuit 2 switches S are brought down to the B side by the output voltage detection circuit 6 is driven by the output of the voltage control circuit 1.
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は、整流回路からの
不安定な電圧を安定した直流電圧に変換して出力する電
圧安定化電源に関する。TECHNICAL FIELD The present invention relates to a voltage stabilized power supply which converts an unstable voltage from a rectifier circuit into a stable DC voltage and outputs the DC voltage.
【０００２】[0002]
【従来の技術】 図１は従来の電圧安定化電源を示した
ものであり、整流回路からの不安定な電圧Ｖｉは、電圧
制御回路１において基準電圧発生回路２の発生する直流
基準電圧Ｖａに対応した直流電圧に制御されて出力され
る。詳しく説明すると、前記基準電圧発生回路２の出力
Ｖａと、前記電圧制御回路１の出力電圧Ｖｏを検出しそ
れに対応した出力Ｖｏ´を出力する帰還回路３の出力は
誤差アンプ４に送られ、誤差アンプ４はＶａとＶｏ´の
差を増幅して電圧制御回路１に送り、電圧制御回路１は
誤差アンプ４の出力が零になるように出力電圧Ｖｏを制
御している。この結果、整流回路からの安定化されてい
ない入力電圧Ｖｉは、電圧制御回路１において基準電圧
発生回路２の発生する直流基準電圧Ｖａに対応した直流
電圧に制御されて出力される。2. Description of the Related Art FIG. 1 shows a conventional voltage-stabilized power supply, in which an unstable voltage Vi from a rectifying circuit is a DC reference voltage Va generated by a reference voltage generating circuit 2 in a voltage control circuit 1. It is output after being controlled to the corresponding DC voltage. More specifically, the output Va of the reference voltage generation circuit 2 and the output of the feedback circuit 3 that detects the output voltage Vo of the voltage control circuit 1 and outputs an output Vo ′ corresponding to the output voltage Vo are sent to the error amplifier 4 to generate an error. The amplifier 4 amplifies the difference between Va and Vo 'and sends it to the voltage control circuit 1, and the voltage control circuit 1 controls the output voltage Vo so that the output of the error amplifier 4 becomes zero. As a result, the unstabilized input voltage Vi from the rectifier circuit is controlled by the voltage control circuit 1 to a DC voltage corresponding to the DC reference voltage Va generated by the reference voltage generation circuit 2 and output.
【０００３】[0003]
【発明が解決しようとする課題】 このように、電圧制
御回路１は基準電圧発生回路２の出力に基づいて電圧を
出力しており、安定した直流電圧を得るためには基準電
圧発生回路２の出力が安定していることが重要な要素と
なる。しかしながら、基準電圧発生回路２は整流回路か
らの不安定な電圧によって駆動されるため、この駆動電
圧の変動によって基準電圧発生回路２の出力が変動し、
結果として電圧制御回路１の出力も変動してしまい、安
定した直流電圧が得られなくなる。この基準電圧発生回
路２の出力変動を無くすには、整流回路と基準電圧発生
回路の間に図１において破線で示した電圧又は電流安定
化回路Ｏを設置すればよいが、安定化回路を余分に用意
しなければならず、電源のコストが上がる。As described above, the voltage control circuit 1 outputs a voltage based on the output of the reference voltage generating circuit 2, and in order to obtain a stable DC voltage, the voltage of the reference voltage generating circuit 2 is increased. The stable output is an important factor. However, since the reference voltage generating circuit 2 is driven by the unstable voltage from the rectifying circuit, the output of the reference voltage generating circuit 2 changes due to the fluctuation of the driving voltage,
As a result, the output of the voltage control circuit 1 also fluctuates, and a stable DC voltage cannot be obtained. In order to eliminate the output fluctuation of the reference voltage generating circuit 2, a voltage or current stabilizing circuit O shown by a broken line in FIG. 1 may be installed between the rectifying circuit and the reference voltage generating circuit, but an additional stabilizing circuit is required. The power supply cost will increase.
【０００４】本発明はこのような点に鑑みて成されたも
ので、その目的は、安定化回路を余分に設けることなく
基準電圧発生回路の出力を安定させて安定した直流電圧
を得ることができる電圧安定化電源を提供することにあ
る。The present invention has been made in view of the above circumstances, and an object thereof is to stabilize the output of the reference voltage generating circuit and obtain a stable DC voltage without providing an additional stabilizing circuit. The purpose is to provide a voltage-stabilized power supply.
【０００５】[0005]
【課題を解決するための手段】 そのため本発明の電圧
安定化電源は、基準電圧を発生する基準電圧発生手段
と、入力電圧を前記基準電圧に基づいて制御して出力す
る電圧制御手段を備えた電圧安定化電源であって、前記
基準電圧発生手段は前記電圧制御手段の出力により駆動
されることを特徴としている。Therefore, the voltage stabilized power supply of the present invention comprises a reference voltage generating means for generating a reference voltage and a voltage control means for controlling and outputting an input voltage based on the reference voltage. It is a voltage-stabilized power supply, characterized in that the reference voltage generating means is driven by the output of the voltage control means.
【０００６】[0006]
【発明の実施の形態】 以下、図面を参照して本発明の
実施の形態を詳細に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
【０００７】図２は本発明の電圧安定化電源の一例を示
したものであり、図１と同一番号を付したものは同一構
成要素を示している。FIG. 2 shows an example of the voltage-stabilized power supply of the present invention, in which the same reference numerals as in FIG. 1 indicate the same constituent elements.
【０００８】図２において、５は電源切換え回路であ
り、スイッチＳをＡ側に倒すと図１の場合と同様に整流
回路の出力が基準電圧発生回路２に送られ、スイッチＳ
をＢ側に倒すと電圧制御回路１の出力が基準電圧発生回
路２に送られるように構成されている。このスイッチの
切換えは、電圧制御回路１の出力電圧を検出する出力電
圧検出回路６により行なわれ、出力電圧検出回路６は、
電圧制御回路１の出力電圧が所定電圧ＶL より小さい時
はスイッチＳをＡ側に倒し、電圧制御回路１の出力電圧
が所定電圧ＶL 以上になるとスイッチＳをＢ側に倒す。In FIG. 2, numeral 5 is a power supply switching circuit. When the switch S is tilted to the A side, the output of the rectifier circuit is sent to the reference voltage generating circuit 2 as in the case of FIG.
Is turned to the B side, the output of the voltage control circuit 1 is sent to the reference voltage generation circuit 2. The switching of this switch is performed by the output voltage detection circuit 6 which detects the output voltage of the voltage control circuit 1.
When the output voltage of the voltage control circuit 1 is lower than the predetermined voltage V L, the switch S is turned down to the A side, and when the output voltage of the voltage control circuit 1 is higher than the predetermined voltage V L , the switch S is turned down to the B side.
【０００９】以下、図２に示した電源の動作を説明す
る。The operation of the power supply shown in FIG. 2 will be described below.
【００１０】電圧制御回路１の電源投入時には電圧制御
回路１の出力は零であるため、出力電圧検出回路６によ
りスイッチＳがＡ側に倒され、基準電圧発生回路２は整
流回路の出力により立ち上げられて基準電圧Ｖａを発生
する。この基準電圧発生回路２の出力Ｖａと、前記電圧
制御回路１の出力電圧Ｖｏを検出した帰還回路３の出力
Ｖｏ´は誤差アンプ４に送られ、誤差アンプ４はそれら
の出力の差を増幅して電圧制御回路１に送るため、フィ
ードバック制御が行なわれる。電源投入直後はＶｏ´は
基準電圧Ｖａよりも小さいので、電圧制御回路１の出力
電圧Ｖｏは図３に示すように時間ｔと共に上昇する。そ
して、電源投入からｔ1 後に出力電圧Ｖｏが前記所定電
圧ＶL になると、出力電圧検出回路６によりスイッチＳ
がＢ側に倒されて基準電圧発生回路２は電圧制御回路１
の出力により駆動される。そして、電源投入からＴ2 後
に電圧制御回路１の出力電圧Ｖｏは基準電圧Ｖａに対応
した電圧となり、以後電圧制御回路１の出力電圧Ｖｏは
基準電圧Ｖａに対応した電圧に保たれる。When the power source of the voltage control circuit 1 is turned on, the output of the voltage control circuit 1 is zero. Therefore, the switch S is turned to the A side by the output voltage detection circuit 6, and the reference voltage generation circuit 2 is turned on by the output of the rectification circuit. It is raised to generate the reference voltage Va. The output Va of the reference voltage generating circuit 2 and the output Vo 'of the feedback circuit 3 which detects the output voltage Vo of the voltage control circuit 1 are sent to the error amplifier 4, and the error amplifier 4 amplifies the difference between these outputs. Feedback to the voltage control circuit 1. Immediately after the power is turned on, Vo 'is smaller than the reference voltage Va, so the output voltage Vo of the voltage control circuit 1 increases with time t as shown in FIG. Then, when the output voltage Vo reaches the predetermined voltage V L after t 1 from the power-on, the output voltage detection circuit 6 causes the switch S
Is turned to the B side, and the reference voltage generation circuit 2 becomes the voltage control circuit 1
Driven by the output of. Then, the output voltage Vo of the voltage control circuit 1 becomes a voltage corresponding to the reference voltage Va after T 2 from the power-on, and thereafter the output voltage Vo of the voltage control circuit 1 is maintained at the voltage corresponding to the reference voltage Va.
【００１１】以上図２に示した電源の動作を説明した
が、この電源においては、電圧制御回路の電源投入時の
短時間だけ基準電圧発生回路が整流回路の出力により駆
動されるが、その後においては電圧制御回路の安定した
出力により基準電圧発生回路が駆動されるので、基準電
圧発生回路の出力は変動せずに安定したものとなる。こ
の結果、電圧制御回路の出力が変動することはなく、安
定した直流電圧が得られる。The operation of the power supply shown in FIG. 2 has been described above. In this power supply, the reference voltage generating circuit is driven by the output of the rectifying circuit only for a short time when the power supply of the voltage control circuit is turned on. Since the reference voltage generating circuit is driven by the stable output of the voltage control circuit, the output of the reference voltage generating circuit is stable without fluctuation. As a result, the output of the voltage control circuit does not fluctuate, and a stable DC voltage can be obtained.
【００１２】[0012]
【発明の効果】 本発明においては、電圧制御手段の安
定した出力により基準電圧発生手段が駆動されるので、
基準電圧発生手段の出力は変動せずに安定したものとな
り、電圧制御手段から安定した直流電圧を得ることがで
きる。According to the present invention, since the reference voltage generating means is driven by the stable output of the voltage control means,
The output of the reference voltage generating means does not change and becomes stable, and a stable DC voltage can be obtained from the voltage control means.
【図１】従来の電圧安定化電源を示した図である。FIG. 1 is a diagram showing a conventional voltage-stabilized power supply.
【図２】本発明の一例として示した電圧安定化電源を示
した図である。FIG. 2 is a diagram showing a voltage stabilized power supply shown as an example of the present invention.
【図３】電圧制御回路１の出力を示した図である。FIG. 3 is a diagram showing an output of the voltage control circuit 1.
１…電圧制御回路、２…基準電圧発生回路、３…帰還回
路、４…誤差アンプ、５…電源切換え回路、６…出力電
圧検出回路、Ｓ…スイッチ、Ｏ…安定化回路DESCRIPTION OF SYMBOLS 1 ... Voltage control circuit, 2 ... Reference voltage generation circuit, 3 ... Feedback circuit, 4 ... Error amplifier, 5 ... Power supply switching circuit, 6 ... Output voltage detection circuit, S ... Switch, O ... Stabilization circuit
Claims (1)
と、入力電圧を前記基準電圧に基づいて制御して出力す
る電圧制御手段を備えた電圧安定化電源であって、前記
基準電圧発生手段は前記電圧制御手段の出力により駆動
されることを特徴とする電圧安定化電源。1. A voltage stabilized power supply comprising a reference voltage generating means for generating a reference voltage and a voltage control means for controlling and outputting an input voltage based on the reference voltage, wherein the reference voltage generating means is A voltage stabilized power supply driven by the output of the voltage control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP169796A JPH09190232A (en) | 1996-01-09 | 1996-01-09 | Voltage stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP169796A JPH09190232A (en) | 1996-01-09 | 1996-01-09 | Voltage stabilized power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09190232A true JPH09190232A (en) | 1997-07-22 |
Family
ID=11508734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP169796A Withdrawn JPH09190232A (en) | 1996-01-09 | 1996-01-09 | Voltage stabilized power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09190232A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002182758A (en) * | 2000-12-14 | 2002-06-26 | Fuji Electric Co Ltd | Voltage regulator circuit |
| JP2015018443A (en) * | 2013-07-11 | 2015-01-29 | ローム株式会社 | Power circuit |
| CN106502296A (en) * | 2016-12-15 | 2017-03-15 | 重庆川仪自动化股份有限公司 | D.C. regulated power supply output circuit and method |
-
1996
- 1996-01-09 JP JP169796A patent/JPH09190232A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002182758A (en) * | 2000-12-14 | 2002-06-26 | Fuji Electric Co Ltd | Voltage regulator circuit |
| JP2015018443A (en) * | 2013-07-11 | 2015-01-29 | ローム株式会社 | Power circuit |
| CN106502296A (en) * | 2016-12-15 | 2017-03-15 | 重庆川仪自动化股份有限公司 | D.C. regulated power supply output circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030401 |