JPH0640286B2 - Power supply start-up control circuit - Google Patents
Power supply start-up control circuitInfo
- Publication number
- JPH0640286B2 JPH0640286B2 JP59248709A JP24870984A JPH0640286B2 JP H0640286 B2 JPH0640286 B2 JP H0640286B2 JP 59248709 A JP59248709 A JP 59248709A JP 24870984 A JP24870984 A JP 24870984A JP H0640286 B2 JPH0640286 B2 JP H0640286B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- supply device
- output voltage
- 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
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/468—Regulating voltage or current wherein the variable actually regulated by the final control device is DC characterised by reference voltage circuitry, e.g. soft start, remote shutdown
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Voltage And Current In General (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は急激な電圧又は電流の印加による負荷の破損防
止のため行われる電源装置のスロースタート用起動制御
回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a slow start start control circuit for a power supply device, which is carried out to prevent damage to a load due to sudden application of voltage or current. is there.
（従来技術） 電源装置により負荷に電力を供給する場合、急激に電圧
又は電流を印加すると回路のもつ例えばインダクタンス
による逆起電力により負荷回路の構成素子を破損するお
それがある。そこでこのようなおそれのある負荷に使用
される電源装置においては、負荷の特性により要求され
る時間内において出力電圧又は電流を０から所定の値ま
で徐々に上昇させる、所謂スロースタート用の起動制御
回路を設けることが行われる。この起動制御回路は第１
図に示すように、電源装置Ｓの出力電圧制御回路(1)例
えば誤差増幅器(1)即ち負入力として加えられる電源装
置の出力電圧に比例する電圧V0と正入力として加えられ
る可変基準電圧VRとを比較して、その差出力を制御すべ
き電源装置Ｓの電圧制御回路に加え、V0＝VRとなるよう
に出力電圧の制御を行わせる誤差増幅器(1)、および可
変基準電圧VRの取得回路(2)を形成する可変電圧取得回
路(3)例えば帰還用コンデンサC1，抵抗R1，演算増幅器
Ａとからなるミラー積分器(3)と、基準電圧取得回路
(4)、例えば非安定直流電源Ｅ、分圧抵抗R2，R3，ツエ
ナーダイオードによる電圧クランプ回路ＣＶからなるVR
の取得回路(4)により構成され、以下に述べるように動
作するものである。即ちミラー積分器(3)に第２図の(a)
ｔ＝t0においてVCが与えられると、可変基準電圧VRは第
２図(b)に示すようにｔ＝t0において０ボルト、その後C
1とR1の積により定まる時定数により次第に低下しｔ＝t
2において電圧クランプ回路ＣＶによつて定まる一定レ
ベル電圧Ｖ′Rとなる変化を示す。そこで可変基準電圧V
Rの変化に１：１で対応して電源装置Ｓの出力電圧V0が
変化し、かつVRが一定レベルＶ′Rとなつた点で所定の
出力電圧V0が得られるように設定すれば、第２図(c)に
示すように電源装置Ｓの出力電圧V0は０ボルトから基準
電圧VRの変化と同じ立上りのもとに上昇して所定の一定
電圧Ｖ′0になる。(Prior Art) When power is supplied to a load from a power supply device, sudden application of voltage or current may damage the components of the load circuit due to counter electromotive force due to the inductance of the circuit, for example. Therefore, in a power supply device used for a load having such a possibility, a startup control for so-called slow start, in which the output voltage or current is gradually increased from 0 to a predetermined value within a time required by the characteristics of the load. Providing a circuit is performed. This start control circuit is the first
As shown in the figure, the output voltage control circuit (1) of the power supply S, for example the error amplifier (1), that is, the voltage V 0 proportional to the output voltage of the power supply applied as a negative input and the variable reference voltage V applied as a positive input An error amplifier (1) that compares R with the voltage control circuit of the power supply device S whose differential output is to be controlled, and controls the output voltage so that V 0 = V R , and a variable reference voltage V variable voltage acquisition circuit (3) for example feedback capacitor C 1 that forms the acquisition circuit (2) of R, resistor R 1, Miller integrator composed of an operational amplifier a (3), the reference voltage acquisition circuit
(4), for example, V R consisting of an unstable DC power source E, voltage dividing resistors R 2 and R 3 , and a voltage clamp circuit CV with a zener diode
Of the acquisition circuit (4) and operates as described below. That is, the Miller integrator (3) is shown in (a) of FIG.
When V C is applied at t = t 0 , the variable reference voltage V R becomes 0 volt at t = t 0 as shown in FIG.
It gradually decreases due to the time constant determined by the product of 1 and R 1 , and t = t
Shows the variation of a constant level voltage V 'R which by connexion determined in voltage clamp circuit CV in 2. Therefore, the variable reference voltage V
It is set so that the output voltage V 0 of the power supply device S changes 1: 1 in response to a change in R, and a predetermined output voltage V 0 is obtained at a point where V R becomes a constant level V ′ R. For example, as shown in FIG. 2 (c), the output voltage V 0 of the power supply device S rises from 0 volt at the same rise as the change of the reference voltage V R and becomes a predetermined constant voltage V ′ 0 .
（従来技術の問題点） しかしこの回路では起動当初出力電圧の制御回路に基準
電圧VRが加えられることにより、例えば第２図(c)中に
点線によつて図示するように、VRによつて定まる以上の
レベルをもつ出力電圧V01がステップ状に現われ易い電
源装置Ｓ、例えば直列共振型コンバータ方式電源の場合
にはスロースタートに失敗する欠点がある。即ち出力電
圧V01がステップ状に現われた場合には、可変基準電圧V
Rが出力電圧V01を送出させるに必要とするレベルである
V01＝VRになる時刻ｔ＝t1まで誤差増幅器(1)は飽和状態
になる。従つて時刻t0からt1まで出力電圧はV01に一定
に保持されて変化することができず、t1以後始めて可変
基準電圧VRの変化に対応してt2まで変化する。その結果
無制御の時間T1を生じて満足すべきスロースタートが行
われなくなるもので、この時間Ｔ１は分単位のスロース
タートを要求される電源装置の場合において数十秒単位
の長い時間に達するものもあり、この事は保守する側に
とつて、電源装置が異常ではないかと心配する恐れがあ
りうるので好ましい事ではない。By reference voltage V R is applied to the control circuit (conventional problems of technology) but starting initially output voltage in this circuit, for example as by connexion shown in dotted line in FIG. 2 in (c), the V R In the case of a power supply device S in which an output voltage V 01 having a level higher than that determined by this is likely to appear stepwise, for example, a series resonance converter system power supply, there is a drawback that slow start fails. That is, when the output voltage V 01 appears in steps, the variable reference voltage V
R is the level required to deliver the output voltage V 01
V 01 = V be R times t = t 1 to the error amplifier (1) is saturated. Therefore, from time t 0 to t 1 , the output voltage is held constant at V 01 and cannot change, and changes from t 1 to t 2 corresponding to the change of the variable reference voltage V R for the first time. As a result, an uncontrolled time T 1 is generated, and a satisfactory slow start is not performed. This time T 1 is a long time of several tens of seconds in the case of a power supply device that requires a slow start in minutes. This is not desirable as it may cause maintenance personnel to worry that the power supply is abnormal.
本発明は出力電圧がステップ状に現われる電源装置の場
合にも、上記の如き無制御時間を著しく短縮して、ほゞ
所定の時間内においてほゞ所要の電圧上昇率に近い上昇
率のもとにスロースタートできる起動制御回路を提供
し、従来回路の欠点を除去したものである。次に図面を
用いてその詳細を説明する。Even in the case of a power supply device in which the output voltage appears in steps, the present invention significantly shortens the non-control time as described above and generates a voltage increase rate close to the required voltage increase rate within a predetermined time. It provides a startup control circuit that can slow start and eliminates the drawbacks of conventional circuits. Next, the details will be described with reference to the drawings.
（問題点を解決するための手段） 本発明の特徴とするところは要するに、起動当初から電
源装置にステップ状の出力電圧V01が現われたとき、誤
差増幅器(1)に正入力として加えられる可変基準電圧取
得回路(2)の出力電圧VRを、電源装置に出力電圧V01を送
出させるに必要なレベルまで急速に増大させる回路を設
けて、無制御時間を従来回路に対して著しく短縮できる
ようにした点にある。(Means for Solving the Problems) The feature of the present invention is that, when a step-like output voltage V 01 appears in the power supply device from the start, the variable amplifier (1) is supplied with a variable input as a positive input. By providing a circuit that rapidly increases the output voltage V R of the reference voltage acquisition circuit (2) to a level required to send the output voltage V 01 to the power supply device, the non-control time can be significantly shortened compared to the conventional circuit. There is a point in doing so.
第３図は本発明の一実施例回路図（第１図と同一符号は
同等部分を示す）であつて、第１図に示した従来回路に
基準電圧の急速上昇回路(5)例えば正入力として一定電
圧取得回路(4)の出力電圧VRを加え、負入力として電源
装置Ｓのステップ状電圧V01を送出するに必要な基準電
圧VRと等しい負電圧VBを与えるバイアス電源Ｂが接続さ
れた誤差増幅器(6)と、その検出誤差電圧を逆流阻止用
ダイオードＤとミラー積分器(3)の抵抗R1に比べて充分
小さい抵抗R4を介して誤差増幅器(1)の正入力として加
えるようにしたものである。FIG. 3 is a circuit diagram of an embodiment of the present invention (the same reference numerals as those in FIG. 1 denote the same parts). In the conventional circuit shown in FIG. As a bias power source B that applies a negative voltage V B equal to the reference voltage V R required to send the stepped voltage V 01 of the power source S as a negative input, the output voltage V R of the constant voltage acquisition circuit (4) is added as The positive input of the error amplifier (1) is connected via the connected error amplifier (6) and the detection error voltage through the resistor R 4 which is sufficiently smaller than the resistance R 1 of the reverse current blocking diode D and the Miller integrator (3). Is added as.
（作用および効果） このようにすれば第４図(a)のように時刻ｔ＝t0におい
てVCがミラー積分器(3)に加えられたとき基準電圧VRは
立上がるが、起動直後においてはVR＞VBであるため誤差
増幅器(5)の出力電圧は正方向に飽和し、その出力はこ
のとき順方向となるダイオードＤを介してミラー積分器
(3)に加えられて帰還用コンデンサC1を充電する。こゝ
で前記したように抵抗R4の抵抗値は抵抗R1のそれに比べ
て充分小さく設定されているから、コンデンサC1の充電
は従来回路に比して急激に行われる。その結果ミラー積
分器(3)の出力電圧VRは第４図(b)のように急激に変化す
る。そして時刻ｔ＝ｔ′1においてVR＝V01＝VBの点を過
ぎると、基準電圧VRとバイアス電圧VBの関係はVR＜VBに
なるため誤差増幅器(4)の出力は反転するが、このとき
ダイオードＤは誤差増幅器(5)の出力に対して逆方向に
なつて阻止作用を呈するので、誤差増幅器(5)の出力に
よる帰還用コンデンサC1の充電は時刻t1以後停止され
る。そしてそれ以後基準電圧VRはVCによる充電によりコ
ンデンサC1と抵抗R1の積により定まる時定数で立上り、
ｔ＝t2において所定の一定出力電圧Ｖ′Rになる。(Operation and effect) In this way, the reference voltage V R rises when V C is applied to the Miller integrator (3) at time t = t 0 as shown in FIG. 4 (a), but immediately after startup. Since V R > V B , the output voltage of the error amplifier (5) is saturated in the positive direction, and the output is forwarded at this time via the diode D, which is the Miller integrator.
It is added to (3) to charge the feedback capacitor C 1 . As described above, the resistance value of the resistor R 4 is set sufficiently smaller than that of the resistor R 1 , so that the capacitor C 1 is charged more rapidly than in the conventional circuit. As a result, the output voltage V R of the Miller integrator (3) changes abruptly as shown in FIG. 4 (b). Then, at the time t = t ′ 1 , after passing the point of V R = V 01 = V B , the relation between the reference voltage V R and the bias voltage V B becomes V R <V B, and therefore the output of the error amplifier (4) becomes Although it is inverted, at this time, the diode D goes in the opposite direction to the output of the error amplifier (5) and exhibits a blocking action, so that the feedback capacitor C 1 is charged by the output of the error amplifier (5) after time t 1. Be stopped. After that, the reference voltage V R rises with a time constant determined by the product of the capacitor C 1 and the resistor R 1 by charging with V C ,
At t = t 2 , it becomes a predetermined constant output voltage V ′ R.
即ち本発明においては誤差増幅器(1)の基準電圧VRを電
源装置Ｓにステップ状出力電圧V01を送出させるに必要
なレベルまで急激に立上がらせることから、第２図と第
４図を対比して明らかなように、従来回路に比べて無制
御時間は従来のT1に対して著しく短かいＴ′1になる。
またｔ′1以降は従来回路と全く同様に、C1とR1の積に
よる時定数でスロースタートを行うことができる。That is, in the present invention, the reference voltage V R of the error amplifier (1) is rapidly raised to a level required for sending the stepped output voltage V 01 to the power supply device S. compared to as is apparent, uncontrolled time is significantly shorter T '1 to a conventional T 1 as compared with the conventional circuit.
The t '1 and later can be carried out in exactly the same manner as the conventional circuit, a slow start with a time constant due to the product of the C 1 and R 1.
第１図および第２図は従来例の回路図および動作の説明
用波形図、第３図および第４図は本発明の一実施例回路
図およびその動作の説明用波形図である。 (1)……誤差増幅器、(2)……可変基準電圧取得回路、 (3)……可変電圧取得回路（ミラー積分器）、 C1……コンデンサ、R1……抵抗、Ａ……演算増幅器、
(4)……一定電圧取得回路、Ｅ……非安定直流電源、R2,
R3……分圧抵抗、ＣＶ……電圧クランプ回路、(5)……
誤差増幅器、VB……バイアス電源、Ｄ……逆流阻止用ダ
イオード、R4……抵抗。1 and 2 are a circuit diagram of a conventional example and a waveform diagram for explaining the operation, and FIGS. 3 and 4 are a circuit diagram of one embodiment of the present invention and a waveform diagram for the operation thereof. (1) …… Error amplifier, (2) …… Variable reference voltage acquisition circuit, (3) …… Variable voltage acquisition circuit (Miller integrator), C 1 … Capacitor, R 1 … Resistance, A …… Calculation amplifier,
(4) …… Constant voltage acquisition circuit, E …… Unstable DC power supply, R 2 ,
R 3 …… Voltage resistance, CV …… Voltage clamp circuit, (5) ……
Error amplifier, V B …… bias power supply, D …… reverse current blocking diode, R 4 …… resistance.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 千田 潤 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 (56)参考文献 実開 昭55−103718（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Jun Senda 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Within Fujitsu Limited (56) Bibliographic references Sho 55-103718 (JP, U)
Claims (1)
において０ボルトから所定電圧まで立上る可変基準電圧
取得回路と、該可変基準電圧取得回路の出力電圧と前記
電源装置の出力電圧との誤差電圧を検出するとともにこ
の誤差電圧が零になるように前記電源装置の出力電圧を
制御する誤差増幅器とを備え、前記電源装置の出力電圧
を０ボルトから所定電圧までスロースタートさせる電源
装置の起動制御回路において、 前記電源装置の出力電圧として立ち上がり開始時にステ
ップ状電圧が生じたとき、前記可変基準電圧取得回路の
出力電圧が前記ステップ状電圧に達するまでの間該可変
基準電圧取得回路に大電流を供給する急速上昇回路を該
可変基準電圧取得回路の入出力間に設け、該可変基準電
圧取得回路の出力電圧を前記ステップ状電圧レベルに達
するまで急速に立上らせるようにしたことを特徴とする
電源装置の起動制御回路。1. A power supply device, a variable reference voltage acquisition circuit that rises from 0 volt to a predetermined voltage within a predetermined slow start time, and an error between an output voltage of the variable reference voltage acquisition circuit and an output voltage of the power supply device. An error amplifier that detects the voltage and controls the output voltage of the power supply device so that the error voltage becomes zero, and starts the power supply device by slowly starting the output voltage of the power supply device from 0 volt to a predetermined voltage. In the circuit, when a stepped voltage is generated at the start of rising as the output voltage of the power supply device, a large current is supplied to the variable reference voltage acquisition circuit until the output voltage of the variable reference voltage acquisition circuit reaches the stepped voltage. A rapid rising circuit for supplying is provided between the input and output of the variable reference voltage acquisition circuit, and the output voltage of the variable reference voltage acquisition circuit is set to the stepped voltage. A start-up control circuit for a power supply device, which is characterized in that it is made to rise rapidly until a pressure level is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59248709A JPH0640286B2 (en) | 1984-11-27 | 1984-11-27 | Power supply start-up control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59248709A JPH0640286B2 (en) | 1984-11-27 | 1984-11-27 | Power supply start-up control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61127017A JPS61127017A (en) | 1986-06-14 |
| JPH0640286B2 true JPH0640286B2 (en) | 1994-05-25 |
Family
ID=17182167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59248709A Expired - Lifetime JPH0640286B2 (en) | 1984-11-27 | 1984-11-27 | Power supply start-up control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640286B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0116174Y2 (en) * | 1979-01-11 | 1989-05-12 |
-
1984
- 1984-11-27 JP JP59248709A patent/JPH0640286B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61127017A (en) | 1986-06-14 |
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