JPH037063A - Dc-dc converter - Google Patents
Dc-dc converterInfo
- Publication number
- JPH037063A JPH037063A JP1140491A JP14049189A JPH037063A JP H037063 A JPH037063 A JP H037063A JP 1140491 A JP1140491 A JP 1140491A JP 14049189 A JP14049189 A JP 14049189A JP H037063 A JPH037063 A JP H037063A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- output
- converter
- transistor
- capacitor
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract description 16
- 238000004804 winding Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000252233 Cyprinus carpio Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、２系統以上の出力を有する直流−直流変換装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a DC-DC converter having two or more output systems.
従来の技術
近年、電子機器の小型、軽量化に対する要求は極めて強
く、特に乾電池を電源とする電子機器においてその傾向
は顕著である。更に、このような機器において、内部の
電子回路が、近年、まずます高性能、高機能化されてき
ておシ、それに伴い複数の電源電圧（例えば＋５Ｖ、＋
１２Ｖ。BACKGROUND OF THE INVENTION In recent years, there has been an extremely strong demand for electronic devices to be smaller and lighter, and this trend is particularly noticeable in electronic devices that use dry batteries as a power source. Furthermore, in recent years, the internal electronic circuits of such devices have become increasingly high-performance and highly functional, and as a result, multiple power supply voltages (for example, +5V, +
12V.
−１２Ｖの３系統など）が必要とされるようになってき
ている。-12V 3 systems, etc.) are now required.
本発明は、このような要求に応えたものであシ、小型、
軽量で複数の出力（電源電圧）が取り出せ、かつ高効率
で安価な直流−直流変換装置を提供するものである。The present invention has been developed in response to these demands.
The object of the present invention is to provide a lightweight, highly efficient, and inexpensive DC-DC converter that can take out a plurality of outputs (power supply voltages).
以下に、従来の複数出力系統を有する直流−直流変換装
置について、図面を参照しながら説明する。A conventional DC-DC converter having multiple output systems will be described below with reference to the drawings.
第２図は、フォワードコンバータ方式で２系統の出力を
有する直流−直流変換装置の回路図である。第２図にお
いて、１は変圧器、２は変圧器１の１次側電圧を変化さ
せるためのスイッチング動作を行うトランジスタ、３は
トランジスタ２を制御するための制御回路である。ダイ
オード１．２、抵抗１３、コンデンサ１４からなる回路
は、変圧器１の鉄心が磁気飽和するのを防ぐためのリセ
ット回路である。ダイオード８．９、コイ／Ｌ’１０゜
コンデンサ１１からなる回路は、出力１を取り出すため
の整流回路であシ、ダイオード４，５、コイ／ｌ／６、
コンデンサ７からなる回路は、出力２を取り出すだめの
整流回路である。FIG. 2 is a circuit diagram of a forward converter type DC-DC converter having two output systems. In FIG. 2, 1 is a transformer, 2 is a transistor that performs a switching operation to change the primary voltage of the transformer 1, and 3 is a control circuit for controlling the transistor 2. In FIG. A circuit consisting of a diode 1.2, a resistor 13, and a capacitor 14 is a reset circuit for preventing the iron core of the transformer 1 from becoming magnetically saturated. The circuit consisting of the diode 8.9, the coil/L'10° capacitor 11 is a rectifier circuit for taking out the output 1, the diode 4, 5, the coil/l/6,
The circuit consisting of the capacitor 7 is a rectifier circuit for taking out the output 2.
以上のように構成された直流τ直流変換装置について、
以下その動作について説明する。Regarding the DC τ DC converter configured as above,
The operation will be explained below.
トランジスタ２は制御回路３からの信号によシスイツチ
ング動作をする。それにより、変圧器１の１次側には電
圧変化が発生するが、その電圧変化は１次側、２次側巻
線の巻数比に応じて拡大または縮小されて２次側に伝達
される。それは、更にダイオード８，９，４，５、コイ
ｌｖ１０ 、６及びコンデンサ１１．７からなる２つの
整流回路を経て、出力し、出力２として取り出される。Transistor 2 performs a switching operation in response to a signal from control circuit 3. As a result, a voltage change occurs on the primary side of the transformer 1, but that voltage change is transmitted to the secondary side after being expanded or contracted depending on the turns ratio of the primary and secondary windings. . It further passes through two rectifier circuits consisting of diodes 8, 9, 4, 5, coils lv10, 6, and capacitors 11.7, outputs, and is taken out as output 2.
入力電圧をｖｏ、出力１の電圧をＶ。１、出力２の電圧
をｖｏ２とし、トランジスタ２のオン状態の期間をＴ。The input voltage is vo, and the voltage of output 1 is V. 1. The voltage of output 2 is vo2, and the on-state period of transistor 2 is T.
ｎ、オフ状態の期間をＴ。ｆｆとすると、ｖ０１＝ｒ１
Ｔｏｎｖｔｈ／（Ｔｏｎ十Ｔｏｆｆ）ｖｏ２” ｘ２
”ｏｎ ｖｉ／ （”ｏｎ”ｏｆｆ）となる（但し、ｒ
ｌ、ｒ２は変圧器１０２次側巻線と１次側巻線の巻数比
であり、ダイオードの電圧降下や変圧器１の巻線抵抗に
よる電圧降下などは無視している）。n, and T is the off-state period. ff, v01=r1
Tonvth/(TontenToff)vo2” x2
"on vi/"("on" off) (however, r
l and r2 are the turns ratio between the secondary winding and the primary winding of the transformer 10, ignoring voltage drops due to diodes and winding resistance of the transformer 1).
発明が解決しようとする課題
しかしながら上記の従来の構成では、部品点数が多く、
またリセット回路で消費される電力が無効電力とな９、
変換効率を低下させるという問題を有していた。Problems to be Solved by the Invention However, the above conventional configuration has a large number of parts;
Also, the power consumed by the reset circuit is reactive power9.
This had the problem of lowering conversion efficiency.
本発明は上記従来の問題を解決するもので、小型、軽量
で複数の出力が取り出せ、かつ高効率で安価な直流−直
流変換装置を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and aims to provide a small, lightweight, highly efficient and inexpensive DC-DC converter that can output a plurality of outputs.
課題を解決するための手段
この目的を達成するために本発明の直流−直流変換装置
は、変圧器の１次側端子から出力の１つを取り出し、変
圧器の２次側端子から他の出力を取り出す構成を有して
いる。Means for Solving the Problems To achieve this object, the DC-DC converter of the present invention takes out one output from the primary terminal of the transformer and extracts the other output from the secondary terminal of the transformer. It has a configuration to take out.
作 用
この構成によって、ダイオード、コイルなどの部品点数
が削減でき、変圧器の２次側回路が簡素化される。また
、変圧器の伝達電力が低下することによシ変圧器が小型
化でき、リセット回路が省略できることによシ、そこで
の電力損失が無くなる。更に、出力の１系統が変圧器の
２次側を通らないことにより２次側巻線の電力損失も無
くなる。Function: With this configuration, the number of components such as diodes and coils can be reduced, and the secondary circuit of the transformer can be simplified. Further, since the transmitted power of the transformer is reduced, the transformer can be made smaller, and the reset circuit can be omitted, thereby eliminating power loss therein. Furthermore, since one output line does not pass through the secondary side of the transformer, power loss in the secondary winding is also eliminated.
これらの作用によ一シ、従来よシも小型、軽量、安価で
かつ高効率な直流−直流変換装置を提供することができ
る。As a result of these effects, it is possible to provide a DC-DC converter that is smaller, lighter, cheaper, and more efficient than conventional devices.
実施例
以下本発明の一実施例について、図面を参照しながら説
明する。EXAMPLE An example of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例における直流−直流変換装置
の構成を示すものである。第１図において、１７は変圧
器、２は変圧器１７の１次側電圧を変化させるためのス
イッチング動作を行うトランジスタ、３はトランジスタ
２を制御するための制御回路である。ダイオード１６．
コンデンサ１６は出力１を取り出すための整流回路であ
シ、ダイオード４，５、コイ／Ｌ／６、コンデンサ７は
出力２を取り出すための整流回路である。FIG. 1 shows the configuration of a DC-DC converter according to an embodiment of the present invention. In FIG. 1, 17 is a transformer, 2 is a transistor that performs a switching operation to change the primary voltage of the transformer 17, and 3 is a control circuit for controlling the transistor 2. In FIG. Diode 16.
The capacitor 16 is a rectifier circuit for taking out the output 1, and the diodes 4 and 5, the coil/L/6, and the capacitor 7 are the rectifier circuit for taking out the output 2.
以上のように構成された直流−直流変換装置について、
以下その動作を説明する。Regarding the DC-DC converter configured as above,
The operation will be explained below.
トランジスタ２は制御回路３からの信号によシスイツチ
ング動作をする。それによシ、変圧器１７の１次側には
電圧変化が発生するが、その電圧変化は１次側、２次側
巻線の巻数比に応じて拡大または縮小されて２次側に伝
達される。それは更にダイオード４，５、コイ）ｖｏ、
コンデンサ７からなる整流回路を経て、出力２として取
り出される。Transistor 2 performs a switching operation in response to a signal from control circuit 3. Accordingly, a voltage change occurs on the primary side of the transformer 17, but that voltage change is transmitted to the secondary side after being expanded or contracted depending on the turns ratio of the primary and secondary windings. Ru. It further includes diodes 4, 5, carp) vo,
It passes through a rectifier circuit consisting of a capacitor 7 and is taken out as an output 2.
一方、変圧器１７の１次側には、トランジスタ２がオン
の期間にエネルギが蓄えられる。このエネルギはトラン
ジスタ２がオフの期間に放出されて、ダイオード１５、
コンデンサ１６からなる整流回路を経て、出力１として
取り出される。入力電圧をｖｉ、出力１の電圧をｖｏｌ
、出力２の電圧をｖｏ２とし、トランジスタ２のオン状
態の期間を”ｏｎ ％オフ状態の期間をＴ。ｆｆ とす
ると、ｖｏｌ ＝（”ｏｎ ＋”ｏｆｆ ） ｖｉ ／
”ｏｆｆｖ０２＝ｒＴｏｎｖ、／（Ｔｏｎ十ＴＯｆｆ
）となる（但し、ｒは変圧器１７の２次側巻線と１次側
巻線の巻数比とし、ダイオードの電圧降下や、変圧器１
７の巻線抵抗による電圧降下などは無視している）。従
来の実施例に対して、出力１の電圧が異なるが、これは
Ｔ。ｎ、”ｏｆｆ や巻数比ｒを変えることによシ同一
の出力電圧を得ることができる。On the other hand, energy is stored on the primary side of the transformer 17 while the transistor 2 is on. This energy is released during the period when transistor 2 is off and flows through diode 15,
It passes through a rectifier circuit consisting of a capacitor 16 and is taken out as output 1. Input voltage is vi, output 1 voltage is vol
, the voltage of output 2 is vo2, the on-state period of transistor 2 is "on %, and the off-state period is T.ff", then vol = ("on +"off) vi /
”offv02=rTonv,/(TontenToff
) (where r is the turns ratio between the secondary winding and the primary winding of the transformer 17, and the voltage drop of the diode and the transformer 1
(The voltage drop due to the winding resistance of 7 is ignored.) Compared to the conventional embodiment, the voltage at output 1 is different, which is T. The same output voltage can be obtained by changing n, "off" and turns ratio r.
以上のように本実施例によれば、従来の実施例に比べ、
ダイオード２本、コイル１本、コンデンサ１本、抵抗１
本が削減でき、かつ変圧器も小型で簡単な２次側巻線の
ものが使用できる。その結果、小型、軽量、安価で高効
率な直流−直流変換装置とすることができる。As described above, according to this embodiment, compared to the conventional embodiment,
2 diodes, 1 coil, 1 capacitor, 1 resistor
The number of books can be reduced, and a transformer with a small and simple secondary winding can be used. As a result, a small, lightweight, inexpensive, and highly efficient DC-DC converter can be obtained.
なお、本実施例において出力は２系統としたが、３系統
以上あってもよい。また、フォワードコンバータ方式に
限らず、プッシュプル方式やハーフブリ、ジ方式、フル
ブリッジ方式などでもよい。In this embodiment, there are two output systems, but there may be three or more output systems. Further, the converter is not limited to the forward converter method, but may also be a push-pull method, a half-bridge method, a full-bridge method, or the like.
更に、変圧器の２次側整流回路は、チョーク入力型では
なく、コンデンサ入力型としてもよい。Furthermore, the secondary rectifier circuit of the transformer may be of a capacitor input type instead of a choke input type.
発明の効果
以上のように本発明は、変圧器の１次側端子から出力の
１つを取り出し、変圧器の２次側端子から他の出力を取
り出す構成にすることにょシ、小型、軽量、安価でかつ
高効率な複数出力を有する直流−直流変換装置を実現で
きるものである。Effects of the Invention As described above, the present invention takes out one output from the primary side terminal of the transformer and takes out the other output from the secondary side terminal of the transformer. It is possible to realize an inexpensive and highly efficient DC-DC converter having multiple outputs.
第１図は本発明の一実施例における直流−直流変換装置
の回路図、第２図は従来の直流−直流変換装置の回路図
である。
１・・・・・・変圧器、２・・・・・・トランジスタ、
３・川・・制御回路、４．５・・・・・・ダイオード、
６・・・・・・コイル、７・・・・・・コンデンサ、８
．９・・・・・・ダイオード、１０・・・・・・コイル
、１１・・・・・・コンデンサ、１２・・・・・・タイ
オード、１３・・・・・・抵抗、１４・・・・・・コン
デンサ、１６・・・−・ダイオード、１６・・・・・・
コンデンサ、１７・・自・・変圧器。FIG. 1 is a circuit diagram of a DC-DC converter according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional DC-DC converter. 1...Transformer, 2...Transistor,
3. River: control circuit, 4.5: diode,
6... Coil, 7... Capacitor, 8
．． 9... Diode, 10... Coil, 11... Capacitor, 12... Diode, 13... Resistor, 14... ...Capacitor, 16...--Diode, 16...
Capacitor, 17... Self... Transformer.
Claims (1)
ジスタと、前記トランジスタを制御するための制御回路
とを備えた直流−直流変換装置であって、第１の出力電
流は前記変圧器の１次側端子に整流回路を設けて取り出
し、第２以後の出力電流は前記変圧器の２次側端子に整
流回路を設けて取り出すことを特徴とする直流−直流変
換装置。A DC-DC conversion device comprising a transformer, a transistor for changing the primary side voltage of the transformer, and a control circuit for controlling the transistor, wherein the first output current is the same as that of the transformer. A DC-DC converter, characterized in that a rectifier circuit is provided at the primary side terminal to take out the output current, and a rectifier circuit is provided at the secondary side terminal of the transformer to take out the second and subsequent output currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1140491A JPH037063A (en) | 1989-06-01 | 1989-06-01 | Dc-dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1140491A JPH037063A (en) | 1989-06-01 | 1989-06-01 | Dc-dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH037063A true JPH037063A (en) | 1991-01-14 |
Family
ID=15269856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1140491A Pending JPH037063A (en) | 1989-06-01 | 1989-06-01 | Dc-dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH037063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06209570A (en) * | 1993-01-06 | 1994-07-26 | Hitachi Ltd | Multiple-output dc-dc converter |
-
1989
- 1989-06-01 JP JP1140491A patent/JPH037063A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06209570A (en) * | 1993-01-06 | 1994-07-26 | Hitachi Ltd | Multiple-output dc-dc converter |
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