JPS58224565A - Stabilized dc/dc converter - Google Patents
Stabilized dc/dc converterInfo
- Publication number
- JPS58224565A JPS58224565A JP10745982A JP10745982A JPS58224565A JP S58224565 A JPS58224565 A JP S58224565A JP 10745982 A JP10745982 A JP 10745982A JP 10745982 A JP10745982 A JP 10745982A JP S58224565 A JPS58224565 A JP S58224565A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- winding
- transistor
- switching
- 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.)
- Pending
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は、自励式スイッチング方式のＤＣ−Ｄ。[Detailed description of the invention] The present invention is a self-excited switching type DC-D.
Ｃコンバータに関するものである。This relates to a C converter.
従来の自励式スイッチング方式のＤＣ−ＤＣコンバータ
の構成説明図を第１図に示す。図に−おいて、１は直流
電源、２は起動用抵抗、３は変換ｌ・ランス、４はスイ
ッチング・［・ランジスタ、６はタイミングコンデンサ
、７はダイオード、８はコンデンサである。また、第２
図は第１図に示した従来回路における各部の動作波形を
示す図である。An explanatory diagram of the configuration of a conventional self-excited switching type DC-DC converter is shown in FIG. In the figure, 1 is a DC power supply, 2 is a starting resistor, 3 is a conversion lance, 4 is a switching transistor, 6 is a timing capacitor, 7 is a diode, and 8 is a capacitor. Also, the second
This figure is a diagram showing operating waveforms of various parts in the conventional circuit shown in FIG. 1.
第１図に示す従来回路においては、直流電源１が接続さ
れると起動用抵抗２を通しスイッチング・１〜ランジス
タ４にわずかなベース電流が流れる（第２図Ｃで示す電
流■β ）。このベース電流は変換［・ランス３の第１
巻線９を通りスイッチングｉ・ランジスタ４のコレクタ
電流（第２図りで示す電流Ｉｃ）を生じせしめる。第１
巻線９ど第２巻線１０は同極性に巻線されており正帰還
により］レクタ電流１ｃは直線的に増加する。イしてベ
ース電流ＩＢ は第２巻線からスイッチングトランジス
タ４のベース、エミッタを通り、タイミングコンデンサ
６を充電する。タイミングコンデンサ６の充電による電
位方向は、第２巻線１０の誘起電圧と逆極性であるため
徐々にベース電流Ｉ は減少する。イして、スイッチン
グ［・ランジスタ４の］レクタ電流ＩＣとベース電流ｌ
の関係が下記（１）式を満足する時、
１ｃ＝ｈＪａ ＸＩ ・・・・・・・・・（１）た
だし、ｈｆｅ−はエミッタ接地の電流増幅率コレクタ電
流は瞬時に遮断され、変換トランス３の極性は反転する
。この時、ペースエミッタ間電圧（第２図Ｂで示す電圧
Ｖ囮）も極性が反転する。In the conventional circuit shown in FIG. 1, when the DC power supply 1 is connected, a small base current flows through the starting resistor 2 to the switching transistor 1 to the transistor 4 (current ■β shown in FIG. 2 C). This base current is converted [・first of lance 3
A collector current (current Ic shown in the second diagram) of the switching transistor 4 is generated through the winding 9. 1st
The winding 9 and the second winding 10 are wound with the same polarity, and due to positive feedback, the rector current 1c increases linearly. Then, the base current IB passes from the second winding through the base and emitter of the switching transistor 4 and charges the timing capacitor 6. Since the direction of the potential due to charging of the timing capacitor 6 is opposite in polarity to the induced voltage of the second winding 10, the base current I 1 gradually decreases. Then, the switching [of transistor 4] rector current IC and base current l
When the relationship satisfies the following equation (1), 1c=hJa The polarity of 3 is reversed. At this time, the polarity of the pace emitter voltage (voltage V decoy shown in FIG. 2B) is also reversed.
スイッチング１−ランジスタ４の遮断期間は、タイミン
グコンデンサ６の電流が起動用抵抗２、およびタイミン
グ抵抗５を通し放電するまでつづく。The switching 1-transistor 4 interruption period continues until the current in the timing capacitor 6 is discharged through the starting resistor 2 and the timing resistor 5.
この時の放電時間ｔは、下記（２）式に示す時間に比例
づる。The discharge time t at this time is proportional to the time shown in equation (2) below.
ただし、Ｒ１は起動用抵抗２の抵抗値、Ｒｚはタイミン
グ抵抗５の抵抗値、
Ｃはタイミングコ・ンデンサの静電
容量、
この時、タイミングコンデンサＣの端子電圧は第２図Ｆ
で示づ電）ｊ： Ｖ Ｃのような変化をする。However, R1 is the resistance value of the starting resistor 2, Rz is the resistance value of the timing resistor 5, and C is the capacitance of the timing capacitor. At this time, the terminal voltage of the timing capacitor C is as shown in Figure 2 F.
(shown by ) j: Changes like VC.
上記第１図の従来回路においては、発振のオン期間また
はオフ期間に出力電圧にＪ：って変化する構成要因を有
せず、出力電圧の変化に対応して出力電圧変化を補正す
る帰還動作を有しないため、入力電圧の変動または負荷
の変動に対し出力電圧の変動が大きい欠点を有する。ま
た、スイッチング周波数の周期がタイミング抵抗５およ
びタイミング：コンテ゛ンリ−６の値によって決よ・）
−（シようため、出力電圧の調整が困難であること、ま
たスイッチングトランジスタ４のスイッチング損失が大
きいことなどの欠点もある。The conventional circuit shown in FIG. 1 above does not have any component that changes the output voltage during the on-period or off-period of oscillation, and has a feedback operation that corrects the output voltage change in response to the change in the output voltage. Therefore, it has the disadvantage that the output voltage fluctuates greatly in response to input voltage fluctuations or load fluctuations. Also, the period of the switching frequency is determined by the values of timing resistor 5 and timing: continuum 6.)
-(Due to the noise, it is difficult to adjust the output voltage, and the switching transistor 4 has a large switching loss.)
本発明は、ｌ記従来技術の欠点を改善することを目的と
覆るものであり、出力電圧の変化を変換Ｉ・ランスの第
２巻線により検出し、ぞの信号を］ンテン１ノーに導き
、充電し、ぞの端子電圧信号を利用してスイッチング素
子の周期を制（ａｎするようにしたことを特徴どするも
ので゛ある。The present invention aims to improve and overcome the drawbacks of the prior art mentioned above, and detects the change in the output voltage by the second winding of the conversion lance, and guides the signal to the output voltage. , and the period of the switching element is controlled (an) using the voltage signal of each terminal.
以下、本発明を図面を参照して詳述する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
第３図は本発明の一実施例を示す構成説明図で−・３−
ある。図において、１は直流電源、２は起動用抵抗、３
は変換トランス、４はスイッチング１−ランジスタ、１
７は動作安定用抵抗、１８はベース電流制御抵抗、７は
ダイオード、８はコンデンサ、９は第１巻線、１０は第
２巻線、１１は第３巻線、１２は抵抗、１３はコンデン
サ、１４は定電圧ダイオード、１５およびコロは第１お
ｊ；び第２のダイオードである。また、第４図に本実施
例における各部の動作波形を示す。FIG. 3 is a configuration explanatory diagram showing one embodiment of the present invention. In the figure, 1 is a DC power supply, 2 is a starting resistor, and 3
is a conversion transformer, 4 is a switching 1-transistor, 1
7 is a resistor for stabilizing operation, 18 is a base current control resistor, 7 is a diode, 8 is a capacitor, 9 is a first winding, 10 is a second winding, 11 is a third winding, 12 is a resistor, 13 is a capacitor , 14 are constant voltage diodes, and 15 and rollers are first and second diodes. Further, FIG. 4 shows operating waveforms of each part in this embodiment.
第３図に示した構成の本発明安定化ＤＣ−ＤＣコンバー
タは次のように動作する。定常発振動作時のスイッチン
グトランジスタ４がオフの期間には、第３巻線の端子電
圧はダイオード７が導通しているためほぼ出力電圧と等
しくなる。この時、第２巻線には、第３巻線と第２巻線
の巻数比に出力電圧を乗じた誘起電圧が誘起される。こ
の誘起電圧は第２巻線からコンデンサ１３．ダイオード
１５を通る電流を流しく第４図Ｇで示す電流ＩＣ２）コ
ンデンサ１３を第２巻線の誘起電圧と等しい逆向きの電
圧（第４図Ｈで示す電圧ＶＣ２）まで充−・４−
電する。この期間は、スイッチング１−ランジスタ４の
オン１ｖＩｒｌ＆Ｉに変換１〜ランス３に蓄積されたエ
ネルギーが、オフの期間に−４へて第３巻線を通じ負荷
側へ供給されるまでつづく。第３巻線１１を流れる電流
が零になると、第２巻線１０の誘起電圧も零どなるため
、この時点においてスイッチング１〜ランジスタ４はオ
ンとなり、瞬時に第２巻線電圧（第４図△で示す電圧ｖ
２）は反転する。第２巻線１０の正の誘起電圧期間には
ダイオード１６、ベース電流制限抵抗１８を通るスイッ
チング１ヘランジスタ４のベース電流（第４図Ｃで示す
電流１ａ）と、定電圧ダイオード１４どコンデンサ１３
を通る電流が流れる。この時、定電圧ダイオード１４を
流れる電流は、第４図Ｆに示す電流１ のように徐々に
増加し、定電圧ダイオード１４の端子電圧が定電圧ダイ
オード１４のツェナー電圧Ｖｚ に足した時点で定電圧
ダイオード１４は導通し、スイッチング１〜ランジスタ
・１のベースとエミッタ間には、スイッチング］・ラン
ジスタ４のオフの期間にコンデンサ１３に充電された端
子電圧が加わる。The stabilized DC-DC converter of the present invention having the configuration shown in FIG. 3 operates as follows. During the period in which the switching transistor 4 is off during steady oscillation operation, the terminal voltage of the third winding becomes approximately equal to the output voltage because the diode 7 is conductive. At this time, an induced voltage is induced in the second winding, which is obtained by multiplying the turns ratio between the third winding and the second winding by the output voltage. This induced voltage is transferred from the second winding to the capacitor 13. The current IC2 shown in FIG. 4 G that flows through the diode 15 charges the capacitor 13 to a voltage in the opposite direction (voltage VC2 shown in FIG. 4 H) equal to the induced voltage in the second winding. do. This period continues until the energy stored in the conversion 1 to lance 3 is supplied to the load side through the third winding during the OFF period of switching 1-transistor 4 during the on-state 1vIrl&I. When the current flowing through the third winding 11 becomes zero, the induced voltage in the second winding 10 also becomes zero. At this point, switching 1 to transistor 4 are turned on, and the second winding voltage (Fig. 4 △ The voltage v shown in
2) is reversed. During the positive induced voltage period of the second winding 10, the base current (current 1a shown in FIG. 4C) of the switching 1 transistor 4 passes through the diode 16 and the base current limiting resistor 18, and the voltage regulator diode 14 and the capacitor 13
A current flows through. At this time, the current flowing through the voltage regulator diode 14 gradually increases as shown in the current 1 shown in FIG. The voltage diode 14 is conductive, and the terminal voltage charged in the capacitor 13 is applied between the base and emitter of the switching transistor 1 to the transistor 1 during the off period of the switching transistor 4.
この：１ンデンザ１３の端子電圧はスイッチング１〜ラ
ンジスタ４に対し、逆バイアス状態となるためスイッチ
ング１〜ランジスタ４は瞬時に遮断され１周期を終了す
る。Since the terminal voltage of this :1 resistor 13 is in a reverse bias state with respect to switching 1 to transistor 4, switching 1 to transistor 4 are instantaneously cut off and one cycle ends.
」−２実流側において、スイッチングトランジスタ・１
０オン明間’ＴｈＮは、定電圧ダイオードのツェナー電
ｆ−ＥＶｚ とコンデンサ−１３の充電端子電圧に関係
すること／）曹ろ、出力電圧をＶＯとすると、の関係が
成立覆る。ただし、Ｎ 、Ｎ は第２巻線１０．第
３巻線１１の巻数である。”-2 On the actual current side, the switching transistor 1
0 ON Akima'ThN is related to the Zener voltage f-EVz of the constant voltage diode and the charging terminal voltage of the capacitor 13. However, N and N are the second windings 10. This is the number of turns of the third winding 11.
まｌζ、スイッチングトランジスタ４のオーツ期間ＴＯ
ＮはＴＯＦＦに比例することから、スイッチング周波数
［は
ｆＯｅ−１／Ｖ□ −−＝（４）
と、出力電圧に逆比例し、出力電圧の安定化が可能どな
るものである。ζ, automatic period TO of switching transistor 4
Since N is proportional to TOFF, the switching frequency [is fOe-1/V□ --= (4), which is inversely proportional to the output voltage, making it possible to stabilize the output voltage.
従って、−［記構成の本発明安定化ＤＣ−ＤＣ］ンバー
タは、第１図に示した従来のものと比べ、出力電圧の安
定性ならびにスイッチング］・ランジスタ４のオフ期間
にコンデンサ１３の逆バイアス電圧が印加されるため、
スイッチングトランジスタ４のオフ時の損失を軽減でき
効率を向上さゼることかできる利点がある。Therefore, the stabilized DC-DC converter of the present invention having the above configuration has better output voltage stability and switching than the conventional one shown in FIG. Because voltage is applied,
This has the advantage that loss when the switching transistor 4 is turned off can be reduced and efficiency can be improved.
第５図お」；び第６図に、従来回路と上記本発明実施例
による特性の比較例を示す。図において、Ａは従来回路
の特性、Ｂは本発明実施例の特性を示す。これらの図か
ら明らかな如く、本発明によれば出力電圧の安定性およ
び効率を大幅に改言することができる。また、本発明に
おいて、動作安定用抵抗１７．抵抗１２は、スイッチン
グトランジスタ４の特性のバラツキ、コンデンサ１２の
容量値のバラツキを補正し、回路動作を安定にし得る作
用がある。FIGS. 5 and 6 show comparative examples of characteristics between the conventional circuit and the embodiment of the present invention. In the figure, A shows the characteristics of the conventional circuit, and B shows the characteristics of the embodiment of the present invention. As is clear from these figures, according to the present invention, the stability and efficiency of the output voltage can be significantly improved. Further, in the present invention, the operation stabilizing resistor 17. The resistor 12 has the function of correcting variations in the characteristics of the switching transistor 4 and variations in the capacitance value of the capacitor 12, thereby stabilizing the circuit operation.
第１図は従来回路の構成を示す回路図、第２図は第１図
の従来回路における各部の動作を示す動作波形図、第３
図は本発明の一実施例を示す回路図、第４図は本発明の
一実施例における各部の動作を示す動作波形図、第５図
および第６図は従来−・７−
回路ど本発明との特性比較図である。
１；直流電源、２：起動用抵抗、３：変換トランス、４
ニスイツチングトランジスタ、５：タイミング抵抗、６
：８：１３：コンデンサ、７；１５１６：ダイオード、
９：第１巻線、１０：第２巻線、１１：第３巻線、１２
：抵抗、１３：コンデンサ、１４：低電圧ダイオード、
１７：動作安定用抵抗、１８：ベース電流制限抵抗。
８−
才 １ 図
オ ２ 図
Ｅ（Ｖｃ）０
Ｕ ロＩＪＪＬＣ！ｙミ
寸 Ｓ 図
手続補正書（方式）
％式％
発明の名称
安定化 Ｄｏ−Ｄｏ コンバータ
補正をする者
事１１との関係 行 許 出 願 人 −ｆ
ｌ、 所 東京都千代ＩＨ区丸の内分下目１番２同
一名 材 １５０８１ 日立金属株式会社代ｔシ者
河野 典夫
代 理 人
二
居 所 東京都千代［１区丸の内会下目］番２跨
補正の対象
明細書
補正の内容 ｌ＼Fig. 1 is a circuit diagram showing the configuration of a conventional circuit, Fig. 2 is an operation waveform diagram showing the operation of each part in the conventional circuit of Fig. 1, and Fig. 3 is a circuit diagram showing the configuration of a conventional circuit.
The figure is a circuit diagram showing an embodiment of the present invention, Fig. 4 is an operation waveform diagram showing the operation of each part in an embodiment of the present invention, and Figs. 5 and 6 are conventional circuits and 7- circuits of the present invention. FIG. 1; DC power supply, 2: Starting resistor, 3: Conversion transformer, 4
Niswitching transistor, 5: Timing resistor, 6
:8:13: Capacitor, 7;1516: Diode,
9: 1st winding, 10: 2nd winding, 11: 3rd winding, 12
: Resistor, 13: Capacitor, 14: Low voltage diode,
17: Operation stabilization resistor, 18: Base current limiting resistor. 8- years old 1 Figure O 2 Figure E (Vc) 0 U Ro IJJLC! y dimension S drawing procedure amendment (method) % formula % Stabilization of the name of the invention Do-Do Relationship with the person making the converter amendment 11 Line Permission Applicant -f
Location: Chiyo, Tokyo, IH-ku, Marunouchi-ku, Lower 1-2 Same name Material: 15081 Hitachi Metals Co., Ltd., Norio Kono, Director, Director: 2 Location: Chiyo, Tokyo [1st Ward, Marunouchi-kai, Lower] No. 2 Cross correction Contents of amendment to the subject specification l\
Claims (1)
おいて、変換トランスの第２巻線の一端子とスイッチン
グ・１−ランジスタの制御端子ベースとの間に接続され
た第１のダイオードと抵抗からなる直列回路、前記スイ
ッチング・１−ランジスタのベースとエミッターに並列
接続された定電圧ダイオードとコンデンサの直列回路、
前記定電圧ダイオードと前記コンアン４ノの接続点およ
び前記ダイ゛オードど前記第２巻線の一端子との接続点
の間に“接続された第２のダイオード、前記コンデンサ
と゛並列に接続された抵抗、および前記スイッチング。 ・トランジスタのエミッターを前記変換１〜ランス１の
第２巻線の他方の端子に接続したことを特徴と・する安
定化ＤＣ−ＤＣコンバータ。[Claims] In a self-excited switching type DC-DC converter, a first diode connected between one terminal of a second winding of a conversion transformer and a control terminal base of a switching transistor. and a series circuit consisting of a resistor, a series circuit of a constant voltage diode and a capacitor connected in parallel to the base and emitter of the switching transistor,
a second diode connected in parallel with the capacitor; A stabilized DC-DC converter, characterized in that the emitter of the transistor is connected to the other terminal of the second winding of the converter 1 to the lance 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10745982A JPS58224565A (en) | 1982-06-22 | 1982-06-22 | Stabilized dc/dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10745982A JPS58224565A (en) | 1982-06-22 | 1982-06-22 | Stabilized dc/dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58224565A true JPS58224565A (en) | 1983-12-26 |
Family
ID=14459707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10745982A Pending JPS58224565A (en) | 1982-06-22 | 1982-06-22 | Stabilized dc/dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58224565A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5015281A (en) * | 1973-06-15 | 1975-02-18 |
-
1982
- 1982-06-22 JP JP10745982A patent/JPS58224565A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5015281A (en) * | 1973-06-15 | 1975-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3707409B2 (en) | Switching power supply | |
| US6373735B2 (en) | AC-DC converter with reduced energy loss through a switching element | |
| US7295449B2 (en) | Simple switched-mode power supply with current and voltage limitation | |
| JP2003224972A (en) | Switching power supply | |
| JP3475892B2 (en) | Switching power supply | |
| JPS5931245B2 (en) | Power supply voltage controlled amplifier | |
| US5392206A (en) | Control circuit for a switching DC-DC power converter including a controlled magnetic core flux resetting technique for output regulation | |
| JP2000156975A (en) | Dc-to-dc converter | |
| US4745535A (en) | Ringing choke type DC/DC converter | |
| JPH11122926A (en) | Self-oscillating switching power supply | |
| JP2004201385A (en) | Dc-dc converter circuit | |
| JP3733440B2 (en) | Switching power supply | |
| JPS58224565A (en) | Stabilized dc/dc converter | |
| JP3171068B2 (en) | Switching power supply | |
| JP3463278B2 (en) | Power supply | |
| JPH0357708B2 (en) | ||
| JP2773534B2 (en) | DC power supply | |
| JP3129037B2 (en) | Switching power supply | |
| JP2559682Y2 (en) | Multi-output switching regulator | |
| JPS58224566A (en) | Stabilized dc/dc converter | |
| JPH0241654A (en) | Ringing choke converter power equipment | |
| JPS5936149Y2 (en) | Stabilized power supply circuit | |
| JPH0315428B2 (en) | ||
| JPH07114545B2 (en) | Switching power supply | |
| JPH07222440A (en) | Switching power supply |