JPH0463629B2 - - Google Patents
Info
- Publication number
- JPH0463629B2 JPH0463629B2 JP12350781A JP12350781A JPH0463629B2 JP H0463629 B2 JPH0463629 B2 JP H0463629B2 JP 12350781 A JP12350781 A JP 12350781A JP 12350781 A JP12350781 A JP 12350781A JP H0463629 B2 JPH0463629 B2 JP H0463629B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- output
- circuit
- drooping
- constant power
- 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
Links
- 230000007704 transition Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Description
【発明の詳細な説明】
本発明は出力容量の利用率向上を目的としたス
イツチング・レギユレータに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching regulator aimed at improving the utilization rate of output capacity.
最近、スイツチング・レギユレータの負荷とし
てDC−DCコンバータが接続される場合が増えて
きた。この種DC−DCコンバータは、その入力電
圧変動に対して電圧が低下すれば入力電流が増加
するという定電力傾向の特性を有しているものが
多く、さらに入力回路に大容量のコンデンサが接
続されている場合が多い。従つて、運転状態にあ
るスイツチング・レギユレータに急激にこの種負
荷が接続された場合には、コンデンサに流れる突
入電流によりスイツチング・レギユレータの出力
が垂下領域に入り出力電圧が瞬時的に低下すると
ともに、コンデンサの突入電流を除外しても定電
力入力特性の関係から定常時よりも大きい負荷電
流が必要となるため、安定に負荷が起動できない
ようなことがある。 Recently, DC-DC converters have been increasingly connected as a load to switching regulators. Many of these types of DC-DC converters have a constant power tendency in which the input current increases as the voltage decreases in response to input voltage fluctuations, and in addition, a large capacitor is connected to the input circuit. It is often done. Therefore, if this type of load is suddenly connected to a switching regulator that is in operation, the output of the switching regulator will enter the droop region due to the inrush current flowing into the capacitor, and the output voltage will drop instantaneously. Even if the inrush current of the capacitor is excluded, due to the constant power input characteristics, a load current larger than that in the steady state is required, so the load may not be able to start stably.
例えば、第１図に示す従来のスイツチング・レ
ギユレータの出力電圧−電流特性図を用いて説明
する。第１図においてｌで示す破線は負荷が必要
とする入力電圧−電流特性例であり、定常運転時
はＢ点にあるものとする。ここでスイツチング・
レギユレータが無負荷運転中（Ａ点）のとき、上
記の様な負荷を投入すると、コンデンサの突入電
流により瞬時的にＡ点からＣ点に変化する。しか
し、Ｃ点では負荷電流としてコンデンサの突入電
流を除外しても垂下電流設定以上の電流を必要と
するためスイツチング・レギユレータの出力電圧
がＣ点以上に上がらず、負荷が安定に起動しな
い。 For example, this will be explained using the output voltage-current characteristic diagram of a conventional switching regulator shown in FIG. In FIG. 1, the broken line indicated by l is an example of the input voltage-current characteristic required by the load, and is assumed to be at point B during steady operation. Switching here
When the above-mentioned load is applied while the regulator is operating without load (point A), the point changes instantaneously from point A to point C due to the inrush current of the capacitor. However, at point C, even if the inrush current of the capacitor is excluded as the load current, a current exceeding the drooping current setting is required, so the output voltage of the switching regulator does not rise above point C, and the load does not start stably.
この様な問題に対しては、スイツチング・レギ
ユレータの出力容量を大幅に増大すれば解決でき
るが、スイツチング・レギユレータの出力容量の
利用率が低下するとともに、コスト、容積、重量
など非常に不合理な面が多い。 This kind of problem can be solved by significantly increasing the output capacity of the switching regulator, but this will reduce the utilization rate of the output capacity of the switching regulator and will also result in very unreasonable cost, volume, and weight issues. There are many faces.
本発明は上述の欠点を除去したスイツチング・
レギユレータ、即ち、ドライブ回路の出力により
動作する主スイツチング回路のスイツチ素子によ
り直流を交流に交換し、交換された交流を主トラ
ンスを介して出力整流回路に出力し、出力整流回
路で再び直流に交換するスイツチング・レギユレ
ータにおいて、出力電圧を検出し所定の定電圧値
を設定する制御信号を出力する定電圧設定回路、
出力電流を検出し所定の垂下電流値を設定する制
御信号を出力する垂下電流設定回路、および主ト
ランスの一次電流を検出し定電力特性をもちかつ
前記所定の垂下電流値よりも大なる出力電流値を
設定する制御信号を出力する定電力設定回路を備
え、出力電流が定電圧領域からさらに増大して垂
下領域を越えて定電力領域に変化するときは、こ
の出力電流を検出して前記定電力設定回路にて制
御するようになし、さらに定電力領域移行後所定
時限遅延後に垂下電流設定回路にて制御するよう
に切換える切換回路を設けたことを特徴とするス
イツチング・レギユレータを提供するものであ
る。 The present invention provides a switching system that eliminates the above-mentioned drawbacks.
The regulator, that is, the switch element of the main switching circuit operated by the output of the drive circuit, exchanges DC into AC, outputs the exchanged AC to the output rectifier circuit via the main transformer, and exchanges it back to DC in the output rectifier circuit. a constant voltage setting circuit that detects the output voltage and outputs a control signal to set a predetermined constant voltage value in a switching regulator;
a drooping current setting circuit that detects an output current and outputs a control signal to set a predetermined drooping current value; and a drooping current setting circuit that detects the primary current of the main transformer and has a constant power characteristic and an output current larger than the predetermined drooping current value. It is equipped with a constant power setting circuit that outputs a control signal for setting a value, and when the output current further increases from the constant voltage region and changes to the constant power region beyond the drooping region, this output current is detected and the above-mentioned constant power setting circuit is provided. The present invention provides a switching regulator characterized in that it is controlled by a power setting circuit, and further includes a switching circuit that switches to control by a drooping current setting circuit after a predetermined time delay after transition to a constant power region. be.
以下、図面を用いて本発明を説明する。 Hereinafter, the present invention will be explained using the drawings.
第２図は本発明のスイツチング・レギユレータ
の出力電圧−電流特性図、第３図は本発明のスイ
ツチング・レギユレータの実施例を示すブロツク
回路図である。 FIG. 2 is an output voltage-current characteristic diagram of the switching regulator of the present invention, and FIG. 3 is a block circuit diagram showing an embodiment of the switching regulator of the present invention.
まず本発明のスイツチング・レギユレータを第
３図の実施例を用いて、その動作を説明する。一
般にスイツチング・レギユレータは、交流入力１
を受電し、ノイズフイルタ２を介して入力整流回
路３により整流し平滑化される。つぎにドライブ
回路９の出力により動作する主スイツチング回路
４の主トランジスタにより交流に交換されるとと
もに主トランス５を介して出力整流回路６に出力
される。ここで再び直流に交換され出力フイルタ
７を介して直流出力８となる。また出力電圧及び
電流は定電圧設定回路１１および垂下電流設定回
路１２により各々の設定値に対して比較検出さ
れ、それらの誤差信号が制御回路１０に出力され
る。制御回路１０では、定電圧設定回路１１の出
力と、垂下電流設定回路１２の出力を突き合わせ
て接続し、各々の設定値を越えようとする回路側
を優先して制御するいわゆるOR回路として構成
し、第１図に示すように出力が定電圧または定電
流特性となるようにドライブ回路９に制御信号が
出力される。 First, the operation of the switching regulator of the present invention will be explained using the embodiment shown in FIG. Generally, switching regulators have AC input 1
is received, and is rectified and smoothed by the input rectifier circuit 3 via the noise filter 2. Next, the main transistor of the main switching circuit 4 operated by the output of the drive circuit 9 converts the current into alternating current and outputs it to the output rectifier circuit 6 via the main transformer 5. Here, it is exchanged again to direct current and becomes a direct current output 8 via an output filter 7. Further, the output voltage and current are compared and detected with respect to respective set values by the constant voltage setting circuit 11 and the drooping current setting circuit 12, and their error signals are outputted to the control circuit 10. In the control circuit 10, the output of the constant voltage setting circuit 11 and the output of the drooping current setting circuit 12 are matched and connected, and configured as a so-called OR circuit that prioritizes and controls the circuit side that attempts to exceed each set value. As shown in FIG. 1, a control signal is output to the drive circuit 9 so that the output has constant voltage or constant current characteristics.
ここで本発明のスイツチング・レギユレータの
場合は出力電流を検出し制御信号を制御回路１０
に出力する垂下電流設定回路１２でスイツチン
グ・レギユレータの連続使用定格となる電流を設
定し、主トランス５の一次電流を検出して制御信
号を制御回路１０に出力する定電力設定回路１４
にて１〜２秒程度の短時間で許容できる最大限に
近い出力電流値を設定する。例えば、垂下電流設
定を10Aとすれば、定電力設定回路１４は10A以
上で出力電圧が低下すれば出力電流が増加するい
わば定電力傾向の特性をもたせることができる。 In the case of the switching regulator of the present invention, the output current is detected and the control signal is sent to the control circuit 10.
A constant power setting circuit 14 detects the primary current of the main transformer 5 and outputs a control signal to the control circuit 10.
Set the output current value close to the maximum allowable value in a short time of about 1 to 2 seconds. For example, if the drooping current setting is 10A, the constant power setting circuit 14 can have a so-called constant power tendency characteristic in which the output current increases as the output voltage decreases above 10A.
定電力設定はほぼ等価的に主トランスの一次電
流を検出することによりできる。 Constant power setting can be done almost equivalently by detecting the primary current of the main transformer.
入力整流回路３の出力電圧は、変流入力電圧に
より決まり、負荷の状態にほとんど影響されず、
ほぼ一定となる。したがつて、主トランスの一次
側の動作電圧も交流入力電圧により決まり、ほぼ
一定の電圧となり、その一次側電流を検出するこ
とにより、出力側の出力電力を検出するのと等価
となる。 The output voltage of the input rectifier circuit 3 is determined by the rectifying input voltage and is almost unaffected by the load condition.
It remains almost constant. Therefore, the operating voltage on the primary side of the main transformer is also determined by the AC input voltage and is a substantially constant voltage, and detecting the primary current is equivalent to detecting the output power on the output side.
よつて、定電力設定回路は、主トランスの一次
側電流を検出し、この電流を一定に制御する設定
回路を設ければほとんど等価的に構成される。 Therefore, the constant power setting circuit can be configured almost equivalently by providing a setting circuit that detects the primary current of the main transformer and controls this current to a constant value.
また、切換回路１３は垂下電流設定回路１２の
出力を検出し、スイツチング・レギユレータの出
力電流が垂下領域に入る際にはまず定電力設定回
路１４の出力が制御回路１０の入力となるように
なし、約0.2〜２秒の遅延時限後垂下電流設定回
路１２の出力が制御回路１０の入力となるように
切換える回路である。また、切換回路１３は、垂
下領域から定電圧領域に移行したとき、元の定電
力設定に切換わり待機する。 Further, the switching circuit 13 detects the output of the drooping current setting circuit 12, and when the output current of the switching regulator enters the drooping region, the output of the constant power setting circuit 14 becomes the input of the control circuit 10. This circuit switches the output of the drooping current setting circuit 12 to the input of the control circuit 10 after a delay time of approximately 0.2 to 2 seconds. Further, when the switching circuit 13 shifts from the droop region to the constant voltage region, it switches to the original constant power setting and stands by.
つぎに本発明のスイツチング・レギユレータの
動作を第２図の出力電圧−電流特性図により説明
すると以下の様になる。第２図において、Ｐで示
す特性は定電力設定回路１４にて制御される特性
であり、ｌで示す破線はDC−DCコンバータなど
の負荷が必要とする入力電圧−電流特性例を示す
ものであり、定常運転時は定電圧設定回路により
制御される定電圧領域Ｂ点にあるものとする。 Next, the operation of the switching regulator of the present invention will be explained below using the output voltage-current characteristic diagram shown in FIG. In FIG. 2, the characteristic indicated by P is the characteristic controlled by the constant power setting circuit 14, and the broken line indicated by l shows an example of the input voltage-current characteristic required by a load such as a DC-DC converter. During steady operation, it is assumed that the constant voltage region is at point B, which is controlled by the constant voltage setting circuit.
ここでスイツチング・レギユレータが無負荷運
転中（Ａ点）の定電圧領域にあるとき、負荷を投
入すると、負荷の入力に接続されたコンデンサの
突入電流により、負荷電流は定電圧領域からｌで
示す破線に沿つて例えばＥ点まで瞬間的に変化す
る。このときスイツチング・レギユレータは定電
力設定回路にて制御されており、出力電流I2にお
ける定電力特性Ｐ上の点はＤとなり、負荷が必要
とする電圧および電流であるＥ点は定電力特性Ｐ
の領域内にあるので問題は生じない。前記コンデ
ンサが充電され、負荷が必要とする電流は、ｌで
示す破線に沿つて急に減少し定電圧−垂下電流領
域内に戻る。 Here, when the switching regulator is in the constant voltage region during no-load operation (point A), when a load is applied, the load current changes from the constant voltage region to the constant voltage region as shown by l due to the inrush current of the capacitor connected to the input of the load. It changes instantaneously along the broken line up to point E, for example. At this time, the switching regulator is controlled by a constant power setting circuit, and the point on the constant power characteristic P at the output current I2 is D, and the point E, which is the voltage and current required by the load, is the constant power characteristic P.
Since it is within the range of , no problem occurs. The capacitor is charged and the current required by the load decreases rapidly along the dashed line indicated by l and returns to the constant voltage-drooping current region.
そして所定時限遅延後垂下電流設定回路１２の
電流設定値I1に切換わるが、このときは負荷が必
要とする電流はI1以下となつており、安定に負荷
が起動できないような事態は発生せず、うまく定
常運転状態（Ｂ点）に移る。 After a predetermined time delay, the current setting value of the drooping current setting circuit 12 is switched to I1 , but at this time, the current required by the load is less than I1 , and a situation where the load cannot be started stably occurs. The machine successfully transitions to a steady state of operation (point B).
定電圧領域に移行したときは、垂下設定は再び
定電力設定回路側に切換わつて待機する。 When shifting to the constant voltage region, the droop setting is switched again to the constant power setting circuit side and stands by.
以上のように本発明のスイツチング・レギユレ
ータにおいては、負荷としてDC−DCコンバータ
などの定電力傾向の入力特性を有する機器が接続
された場合でも、スイツチング・レギユレータの
容量を増大することなく、安定に起動することが
でき、スイツチング・レギユレータの利用率が大
幅に向上できると共に、コスト、容積、重量など
の面からその工業的価値は絶大である。 As described above, the switching regulator of the present invention can operate stably without increasing the capacity of the switching regulator even when a device with a constant power input characteristic such as a DC-DC converter is connected as a load. The switching regulator can be started up and the utilization rate of the switching regulator can be greatly improved, and its industrial value is enormous in terms of cost, volume, weight, etc.
第１図は従来のスイツチング・レギユレータの
出力電圧−電流特性図、第２図は本発明装置の出
力電圧−電流特性図、第３図は本発明の実施例を
示すブロツク回路図である。
FIG. 1 is an output voltage-current characteristic diagram of a conventional switching regulator, FIG. 2 is an output voltage-current characteristic diagram of the device of the present invention, and FIG. 3 is a block circuit diagram showing an embodiment of the present invention.
Claims (1)
チング回路のスイツチ素子により直流を交流に交
換し、交換された交流を主トランスを介して出力
整流回路に出力し、出力整流回路で再び直流に交
換するスイツチング・レギユレータにおいて、出
力電圧を検出し所定の定電圧値を設定する制御信
号を出力する定電圧設定回路、出力電流を検出し
所定の垂下電流値を設定する制御信号を出力する
垂下電流設定回路、および主トランスの一次電流
を検出し定電力特性をもちかつ前記所定の垂下電
流値よりも大なる出力電流値を設定する制御信号
を出力する定電力設定回路を備え、出力電流が定
電圧領域からさらに増大して垂下領域を越えて定
電力領域に変化するときは、この出力電流を検出
して前記定電力設定回路にて制御するようにな
し、さらに定電力領域移行後所定時限遅延後に垂
下電流設定回路にて制御するように切換える切換
回路を設けたことを特徴とするスイツチング・レ
ギユレータ。1. A switching system in which direct current is exchanged to alternating current by a switch element in the main switching circuit operated by the output of the drive circuit, the exchanged alternating current is output to the output rectifier circuit via the main transformer, and the exchanged alternating current is exchanged to direct current again in the output rectifier circuit. In the regulator, a constant voltage setting circuit detects the output voltage and outputs a control signal to set a predetermined constant voltage value, a drooping current setting circuit detects the output current and outputs a control signal to set a predetermined drooping current value, and A constant power setting circuit detects the primary current of the main transformer and outputs a control signal that has constant power characteristics and sets an output current value larger than the predetermined drooping current value, When the output current increases and changes beyond the drooping region to the constant power region, this output current is detected and controlled by the constant power setting circuit, and the drooping current is set after a predetermined time delay after the transition to the constant power region. A switching regulator characterized in that it is provided with a switching circuit that switches so as to be controlled by the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12350781A JPS5824923A (en) | 1981-08-05 | 1981-08-05 | Switching regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12350781A JPS5824923A (en) | 1981-08-05 | 1981-08-05 | Switching regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5824923A JPS5824923A (en) | 1983-02-15 |
| JPH0463629B2 true JPH0463629B2 (en) | 1992-10-12 |
Family
ID=14862324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12350781A Granted JPS5824923A (en) | 1981-08-05 | 1981-08-05 | Switching regulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5824923A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01194866A (en) * | 1988-01-28 | 1989-08-04 | Yokogawa Electric Corp | Overcurrent protective circuit of current device |
| JP5746928B2 (en) * | 2011-08-23 | 2015-07-08 | 株式会社Ｎｔｔファシリティーズ | DC power supply |
| JP6410350B2 (en) * | 2014-09-25 | 2018-10-24 | ミドリ安全株式会社 | Power supply |
-
1981
- 1981-08-05 JP JP12350781A patent/JPS5824923A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5824923A (en) | 1983-02-15 |
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