JPS635991B2 - - Google Patents
Info
- Publication number
- JPS635991B2 JPS635991B2 JP56155088A JP15508881A JPS635991B2 JP S635991 B2 JPS635991 B2 JP S635991B2 JP 56155088 A JP56155088 A JP 56155088A JP 15508881 A JP15508881 A JP 15508881A JP S635991 B2 JPS635991 B2 JP S635991B2
- Authority
- JP
- Japan
- Prior art keywords
- pulse width
- signal
- transformer
- output
- winding
- 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
- 238000004804 winding Methods 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 12
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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
- H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33538—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Description
【発明の詳細な説明】
本発明はスイツチング・レギユレータに関す
る。スイツチング・レギユレータはいわゆるDC
―DCコンバータであり、一次側直流入力を
PWM制御（パルス幅変調制御）によつて交流し
た上で、トランスを介し二次側に各種の所定レベ
ルで且つ安定化した各種直流出力を得るものであ
る。この場合の安定化は前記PWM制御によつて
なされる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching regulator. The switching regulator is a so-called DC
- It is a DC converter, and the primary side DC input is
After alternating current is generated through PWM control (pulse width modulation control), various stabilized DC outputs at various predetermined levels are obtained on the secondary side via a transformer. Stabilization in this case is achieved by the PWM control.
多出力スイツチング・レギユレータの制御とし
て一般には、入力電圧の変動のみを監視する形
式と、出力電圧の変動のみを監視する形式と、
入力電圧および出力電圧の変動の双方を監視す
る形式とに分けられるが、通常、直流出力の安定
化に最も強く関係してくるのは入力電圧の変動で
あることから、上記の形式を採る場合が多い。
本発明もこのの形式に準拠するものである。 In general, there are two types of control for multi-output switching regulators: one that monitors only input voltage fluctuations, and one that monitors only output voltage fluctuations.
There are two types of monitoring methods: one that monitors both input voltage and output voltage fluctuations, but since input voltage fluctuations are usually most closely related to stabilizing DC output, the above method is used. There are many.
The present invention also conforms to this format.
ところで従来のの形式によるスイツチング・
レギユレータは、いわゆるフイード・フオワード
による制御であつた。つまり、入力電圧のレベル
が上昇すればパルス幅を狭くし、下降すればパル
ス幅を広くするというものである。このため安定
化のための安定点として固定的なものはなく浮動
的である。この結果、高い安定度を有するスイツ
チング・レギユレータが得られないという問題が
あつた。 By the way, switching in the conventional format
The regulator was controlled by so-called feed forward. In other words, if the level of the input voltage rises, the pulse width is narrowed, and if it falls, the pulse width is widened. Therefore, there is no fixed stable point for stabilization, but it is floating. As a result, a problem arises in that a switching regulator with high stability cannot be obtained.
従つて本発明の目的は上記問題を解決すること
のできる高安定度のスイツチングレギユレータを
提案することである。 SUMMARY OF THE INVENTION It is therefore an object of the present invention to propose a highly stable switching regulator that can solve the above problems.
上記目的に従い本発明は、前述したフイード・
フオワードに代えてフイード・バツクによる安定
化制御を行なうものとし、常に予め定めた固定の
スレツシヨルドレベルに収束するように入力電圧
を制御するものであり、具体的には一次巻線と二
次巻線を備えるトランスに対してさらに検出用巻
線を設け、該検出用巻線の出力にはCR時定数回
路を付加し、該CR時定数回路の出力が所定スレ
ツシヨルドレベルに到達するまでの時間に応じた
パルス幅変調制御を行なうようにしたことを特徴
とするものである。 In accordance with the above object, the present invention provides the above-mentioned feed.
Stabilization control is performed using feed back instead of forward, and the input voltage is controlled so that it always converges to a predetermined fixed threshold level. A detection winding is further provided for the transformer equipped with a winding, and a CR time constant circuit is added to the output of the detection winding until the output of the CR time constant circuit reaches a predetermined threshold level. The present invention is characterized in that pulse width modulation control is performed according to the time.
以下図面に従つて本発明を説明する。 The present invention will be explained below with reference to the drawings.
第１図は本発明に基づくスイツチング・レギユ
レータの一実施例を示す回路図である。本図にお
いて、１０はトランスであり、一次巻線１１およ
び二次巻線１２，１２′等と本発明に係る検出用
巻線１３とを備える。トランス１０の一次側にお
いては直流入力DCioが供給され、その二次側から
は各種所定レベルの直流出力DCput，DC′put等が
取り出される。なお、直流出力の種類はこれら
DCput，DC′putに限らずさらに増えても良く、あ
るいは、逆に単一の直流出力であつても構わな
い。通常は多出力の場合が多い。直流入力DCio
は、トランス１０を通過するために一旦パルス幅
変調制御回路（PWM）１５において交流信号に
変換される。なお１４はリツプル除去用のコンデ
ンサ、１８は回路１５への電源供給ラインであ
り、検出用巻線１３を一部兼用した形となつてい
る。このパルス幅変調制御回路１５は、スイツチ
素子（例えばトランジスタ）１６をオンオフする
ことにより、直流入力DCioを交流信号に変換す
る。 FIG. 1 is a circuit diagram showing one embodiment of a switching regulator according to the present invention. In this figure, 10 is a transformer, which includes a primary winding 11, secondary windings 12, 12', etc., and a detection winding 13 according to the present invention. A DC input DCio is supplied to the primary side of the transformer 10, and DC outputs DCput , DC'put , etc. of various predetermined levels are taken out from the secondary side. Please note that these are the types of DC output.
It is not limited to DC put and DC′ put , but may be increased, or conversely, it may be a single DC output. Usually there are many outputs. DC input DC io
is once converted into an alternating current signal in a pulse width modulation control circuit (PWM) 15 in order to pass through the transformer 10. Note that 14 is a capacitor for ripple removal, and 18 is a power supply line to the circuit 15, which also serves as a part of the detection winding 13. The pulse width modulation control circuit 15 converts the DC input DC io into an AC signal by turning on and off a switch element (for example, a transistor) 16.
ところで従来は、点線のライン１７，１７′よ
り一次巻線１１の交流信号の電圧変動のピークレ
ベルを検出し、前記交流信号のパルス幅を制御す
るということを行なつている。該交流信号の電圧
のピークレベルが高低変動したときにそのパルス
幅を狭く又は広く制御するのである。かくして、
フイード・フオワード制御により一応安定化した
交流信号がトランス１０を通過することになり、
ある程度安定化した所望のレベルの直流出力
DCput，DC′put等が各整流回路１９，１９′等を介
して得られる。然し、この直流出力DCput，
DC′putの安定化は十分であるとはいえない。なぜ
なら、フイード・バツク制御でなく、フイード・
フオワード制御をベースにしているからである。
そこでこのような、フイード・フオワード制御を
排除するために、設けたのが前記の検出用巻線１
３である。この検出用回線はトランス１０の同一
コア上に巻回される。この場合の動作波形を図解
的に示したのが第２図である。第２図は第１図に
おける本発明に係る部分に現われる波形を示す波
形図である。この第１図における本発明に係る部
分は、前記検出用巻線１３を内蔵する一点鎖線の
ブロツク２０として示され、抵抗Ｒ１，Ｒ２，ダ
イオードＤおよびCR時定数回路２１からなる。
ただし、ダイオードＤは半波整流用ダイオード、
抵抗Ｒ１はサージ吸収用のシヤント抵抗、抵抗Ｒ
２はレベル調整用の抵抗であり、本発明の特に本
質的な部分ではない。従つて本発明に関係するの
は検出用巻線１３に接続するCR時定数回路２１
である。第２図の波形を参照すると、検出用巻線
１３に現われる交流信号Ｖ１は(a)欄に示され、パ
ルス幅変調制御回路１５に対する制御出力として
の信号Ｖ２は(b)欄に示される。信号Ｖ２は、CR
時定数回路２１により積分波形となつている。 Conventionally, the peak level of the voltage fluctuation of the AC signal of the primary winding 11 is detected from the dotted lines 17, 17', and the pulse width of the AC signal is controlled. When the peak level of the voltage of the AC signal fluctuates in height, the pulse width is controlled to be narrow or wide. Thus,
The AC signal that has been stabilized by feed forward control will pass through the transformer 10,
DC output at desired level with some stabilization
DC put , DC' put , etc. are obtained through each rectifier circuit 19, 19', etc. However, this DC output DC put ,
It cannot be said that the stabilization of DC′ put is sufficient. This is because feed back control is not
This is because it is based on forward control.
Therefore, in order to eliminate such feed forward control, the above-mentioned detection winding 1 was provided.
It is 3. This detection line is wound on the same core of the transformer 10. FIG. 2 diagrammatically shows the operating waveforms in this case. FIG. 2 is a waveform diagram showing waveforms appearing in a portion related to the present invention in FIG. 1. The portion according to the present invention in FIG. 1 is shown as a block 20 indicated by a dashed line containing the detection winding 13, and is composed of resistors R1, R2, a diode D, and a CR time constant circuit 21.
However, diode D is a half-wave rectifier diode,
Resistor R1 is a shunt resistor for surge absorption, and resistor R
2 is a resistor for level adjustment, and is not a particularly essential part of the present invention. Therefore, what is relevant to the present invention is the CR time constant circuit 21 connected to the detection winding 13.
It is. Referring to the waveforms in FIG. 2, the AC signal V1 appearing in the detection winding 13 is shown in column (a), and the signal V2 as a control output to the pulse width modulation control circuit 15 is shown in column (b). Signal V2 is CR
The time constant circuit 21 forms an integral waveform.
今、入力電圧が上昇したとすると、交流信号Ｖ
１は第２図ａ欄の実線波形の如く高いレベルの振
幅Ｖ１Hをもつて現われる。逆に、入力電圧が下
降すると、交流信号Ｖ１は第２図ａ欄の点線波形
の如く低いレベルの振幅Ｖ１Lをもつて現われる。 Now, if the input voltage increases, the AC signal V
1 appears with a high level amplitude V1 H as shown in the solid line waveform in column a of FIG. Conversely, when the input voltage decreases, the AC signal V1 appears with a low level amplitude V1 L , as shown by the dotted line waveform in column a of FIG.
このように交流信号Ｖ１の振幅レベルが高低変
動すると、CR時定数回路２１の出力電圧Ｖ２は、
第２図のｂ欄に示す如く立上りの傾斜が鋭く又は
緩くなる。そこでこのような立上りの傾斜変化
を、パルス幅変調制御回路１５内に設定されたス
レツシヨルドレベルVTHで監視すれば、交流信号
Ｖ１のレベルがＶ１Hと高いときは時間TON1をも
つてVTHに至り、又、Ｖ１Lと低いときは時間TON2
をもつてVTHに至る。ここにTON2＞TON1である。
そこで、これらの時間TON1，TON2をパルス幅と
するようにスイツチ素子１６をオン・オフ制御す
る。つまり、入力電圧が高いとき、交流信号Ｖ１
はレベルＶ１Hをとり、パルス幅はTON1と短くな
り、入力電圧が低くなつたときは、レベルＶ１L
をとり、パルス幅はTON2と長くなる。パルス幅
が長ければ長い程交流信号レベルは上昇する。 When the amplitude level of the AC signal V1 fluctuates in this way, the output voltage V2 of the CR time constant circuit 21 becomes
As shown in column b of FIG. 2, the slope of the rise becomes sharp or gentle. Therefore, if such a change in the slope of the rise is monitored using the threshold level V TH set in the pulse width modulation control circuit 15, when the level of the AC signal V1 is as high as V1 When V TH is reached and V1 L is low, time T ON2
leads to V TH . Here, T ON2 > T ON1 .
Therefore, the switch element 16 is controlled on/off so that these times T ON1 and T ON2 are set as pulse widths. In other words, when the input voltage is high, the AC signal V1
takes the level V1 H , the pulse width becomes short as T ON1 , and when the input voltage becomes low, the level V1 L
, and the pulse width becomes T ON2 . The longer the pulse width, the higher the AC signal level.
以上説明したように本発明によれば、入力電圧
変動のみを監視する形式のスイツチング・レギユ
レータにおける既述した従来の問題を伴うことな
く、高い精度をもつて出力電圧の安定化が図れる
スイツチング・レギユレータが実現される。 As explained above, according to the present invention, there is provided a switching regulator that is capable of stabilizing the output voltage with high accuracy without the above-mentioned conventional problems in switching regulators that monitor only input voltage fluctuations. is realized.
第１図は本発明に基づくスイツチング・レギユ
レータの一実施例を示す回路図、第２図は第１図
における本発明に係る部分に現われる波形を示す
波形図である。
１０…トランス、１１…一次巻線、１２…二次
巻線、１３…検出用巻線、１５…パルス幅変調制
御回路、２０…本発明に係る回路部分、２１…
CR時定数回路。
FIG. 1 is a circuit diagram showing an embodiment of a switching regulator based on the present invention, and FIG. 2 is a waveform diagram showing waveforms appearing in a portion related to the present invention in FIG. DESCRIPTION OF SYMBOLS 10...Transformer, 11...Primary winding, 12...Secondary winding, 13...Detection winding, 15...Pulse width modulation control circuit, 20...Circuit portion according to the present invention, 21...
CR time constant circuit.
Claims (1)
と、直流入力を可変パルス幅の交流信号に変換し
て該一次巻線に印加するパルス幅変調制御回路と
を有し、前記トランスの二次巻線より整流回路を
通して所定レベルの直流出力を得るようにしたス
イツチング・レギユレータにおいて、 前記トランスに対してさらに検出用巻線を設
け、該検出用巻線の出力をCR時定数回路を通し
て取り出し、該CR時定数回路からの出力電圧が
前記パルス幅変調制御回路に内蔵された一定のス
レツシヨルドレベルVTHに達するまでの時間に比
例して前記可変パルス幅を制御するようにしたこ
とを特徴とするスイツチング・レギユレータ。[Claims] 1. A transformer comprising a primary winding and a secondary winding, and a pulse width modulation control circuit that converts a DC input into an AC signal with a variable pulse width and applies the signal to the primary winding, In a switching regulator in which a DC output of a predetermined level is obtained from the secondary winding of the transformer through a rectifier circuit, a detection winding is further provided for the transformer, and the output of the detection winding is set to a CR time constant. The variable pulse width is controlled in proportion to the time it takes for the output voltage from the CR time constant circuit to reach a certain threshold level V TH built into the pulse width modulation control circuit. A switching regulator characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56155088A JPS5856112A (en) | 1981-09-30 | 1981-09-30 | Switching regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56155088A JPS5856112A (en) | 1981-09-30 | 1981-09-30 | Switching regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5856112A JPS5856112A (en) | 1983-04-02 |
| JPS635991B2 true JPS635991B2 (en) | 1988-02-06 |
Family
ID=15598382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56155088A Granted JPS5856112A (en) | 1981-09-30 | 1981-09-30 | Switching regulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5856112A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61170279A (en) * | 1985-01-22 | 1986-07-31 | Shinko Electric Co Ltd | Chopper type stabilized power source |
| JPH0732595B2 (en) * | 1987-04-03 | 1995-04-10 | 日本電気株式会社 | Feedforward control system DC-DC converter |
| JPH04340363A (en) * | 1991-05-13 | 1992-11-26 | Makita Corp | Switching regulator |
| DE19848649C5 (en) | 1998-10-22 | 2008-11-27 | Peter Greiner | Carbon piston for an internal combustion engine |
-
1981
- 1981-09-30 JP JP56155088A patent/JPS5856112A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5856112A (en) | 1983-04-02 |
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