JPS626423B2 - - Google Patents
Info
- Publication number
- JPS626423B2 JPS626423B2 JP799679A JP799679A JPS626423B2 JP S626423 B2 JPS626423 B2 JP S626423B2 JP 799679 A JP799679 A JP 799679A JP 799679 A JP799679 A JP 799679A JP S626423 B2 JPS626423 B2 JP S626423B2
- Authority
- JP
- Japan
- Prior art keywords
- diode
- circuit
- anode side
- capacitor
- smoothing 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
Links
- 238000004804 winding Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 claims description 4
- 238000009499 grossing Methods 0.000 claims 4
- 230000005284 excitation Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
【発明の詳細な説明】
本発明は一石式コンバータに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single-stone converter.
出力電圧が比較的高圧になる場合、主トランス
の二次巻線は一巻線とし、ダイオードブリツジに
よる全波整流方式にした方が主トランスの小型
化、耐圧設計の面から有利となる。第１図に従来
の昇圧型コンバータの例を示す。主トランジスタ
Q1がオンするとダイオードD1，D3が導通し、Q1
がオンになる直前に主トランスT1の二次巻線に
流れていた電流を連続ならしめる電流と励磁電流
及び負荷電流に応じた電流の和がQ1のコレクタ
電流として流れる。次にQ1がオフになると、励
磁エネルギーによりフライバツク電圧が発生し、
ダイオードD0が導通して励磁エネルギーの殆ん
どが電源側へ戻され、一部がダイオードD2，D4
を通して負荷側へ供給される。従つて従来回路で
はダイオードD0を介して入力電流と励磁エネル
ギーの変換が繰り返されるので効率も悪く、その
為の巻線も必要となり、トランスの小型化にも限
界があつた。 When the output voltage is relatively high, the secondary winding of the main transformer is a single winding, and full-wave rectification using a diode bridge is advantageous in terms of downsizing the main transformer and design withstand voltage. FIG. 1 shows an example of a conventional boost converter. main transistor
When Q 1 turns on, diodes D 1 and D 3 become conductive, and Q 1
The sum of the current that makes the current flowing in the secondary winding of the main transformer T1 continuous just before it turns on, the excitation current, and the current according to the load current flows as the collector current of Q1 . Next, when Q 1 turns off, the excitation energy generates a flyback voltage,
Diode D 0 becomes conductive and most of the excitation energy is returned to the power supply side, and some of it is transferred to diodes D 2 and D 4
is supplied to the load side through. Therefore, in the conventional circuit, the input current and excitation energy are repeatedly converted through the diode D 0 , resulting in poor efficiency, requiring additional windings, and limiting the ability to miniaturize the transformer.
本発明の目的はこのような従来回路の欠点をな
くした回路を提供することにある。 An object of the present invention is to provide a circuit that eliminates the drawbacks of such conventional circuits.
第２図に本発明の回路を示す。ブリツジ整流回
路において、トランジスタQ1がオフ時に導通と
なるダイオード回路がそれぞれ２個のダイオード
よりなり、各々の中点となる結合点間にコンデン
サC2を挿入した整流方式をもつ一石式コンバー
タである。この整流方式により、従来回路におけ
る主トランスの励磁エネルギーを電源側へ戻す巻
線を削除できる。 FIG. 2 shows a circuit according to the invention. In the bridge rectifier circuit, each diode circuit is conductive when the transistor Q1 is off, and it is a single-stone converter with a rectification method in which the diode circuit is made up of two diodes, and a capacitor C2 is inserted between the connection points that are the midpoints of each diode circuit. . This rectification method makes it possible to eliminate the winding that returns the excitation energy of the main transformer to the power supply in the conventional circuit.
本回路の動作を第２図及び第３図の動作波形に
て説明する。今、ｔ＝t1でトランジスタQ1がオフ
になると、ｔ＝０〜t1の期間にトランスT1に蓄積
された励磁エネルギーによりフライバツク電圧が
発生し、ダイオードD2，D4〜D6が導通し、コン
デンサC2が充電されるとともに負荷に励磁エネ
ルギーが全て放出される。従つて、本回路によれ
ばトランスT1に蓄積された励磁エネルギーが直
接出力側へ供給されるので、伝達効率もよく、さ
らに整流部出力の電圧もコンデンサC2の充電々
圧により変動が少なくなるため、従来回路に比べ
リツプル電圧も小さくすることができる。 The operation of this circuit will be explained using operation waveforms shown in FIGS. 2 and 3. Now, when the transistor Q1 is turned off at t= t1 , a flyback voltage is generated due to the excitation energy accumulated in the transformer T1 during the period from t=0 to t1 , and the diodes D2 , D4 to D6 are turned off. Conduction occurs, charging the capacitor C2 and releasing all the excitation energy to the load. Therefore, according to this circuit, the excitation energy stored in the transformer T1 is directly supplied to the output side, so the transfer efficiency is good, and furthermore, the voltage at the rectifier output has little fluctuation due to the charging pressure of the capacitor C2 . Therefore, ripple voltage can also be reduced compared to conventional circuits.
第１図は従来の昇圧型コンバータの一例を示す
回路図、第２図は本発明の一実施例を示す回路
図、第３図はその動作波形図である。
T1……トランス、D1〜D6……ダイオード、C2
……コンデンサ。
FIG. 1 is a circuit diagram showing an example of a conventional boost converter, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is an operating waveform diagram thereof. T1 ...Transformer, D1 ~ D6 ...Diode, C2
...Capacitor.
Claims (1)
ンジスタが直列に接続された入力回路と、出力部
にチヨークインプツトの平滑回路を有する一石式
コンバータ回路において、該主トランスの出力巻
線の一端に第一のダイオードのアノード側と第二
のダイオードのカソード側を、該出力巻線の他端
に第三のダイオードのカソード側と第四のダイオ
ードのアノード側を、該第二のダイオードのアノ
ード側にコンデンサの一端と第五のダイオードの
カソード側を、該第四のダイオードのカソード側
に該コンデンサの他端と第六のダイオードのアノ
ード側を接続し、且つ該平滑回路の一端に第一の
ダイオードのカソード側と第六のダイオードのカ
ソード側を該平滑回路の他端に第三のダイオード
のアノード側と第五のダイオードのアノード側を
各々接続したことを特徴とする一石式コンバー
タ。1. In a single-stone converter circuit that has an input circuit in which an input power source, the primary winding of the main transformer, and the main transistor are connected in series, and a smoothing circuit of a chiyo-impact at the output part, one end of the output winding of the main transformer the anode side of the first diode and the cathode side of the second diode to the other end of the output winding, the cathode side of the third diode and the anode side of the fourth diode to the other end of the output winding, and the anode side of the second diode One end of the capacitor and the cathode side of the fifth diode are connected to one end of the smoothing circuit, the other end of the capacitor and the anode side of the sixth diode are connected to the cathode side of the fourth diode, and the first end is connected to one end of the smoothing circuit. A single-stone converter characterized in that the anode side of the third diode and the anode side of the fifth diode are connected to the other end of the smoothing circuit, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP799679A JPS55100066A (en) | 1979-01-25 | 1979-01-25 | Single transistor type converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP799679A JPS55100066A (en) | 1979-01-25 | 1979-01-25 | Single transistor type converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55100066A JPS55100066A (en) | 1980-07-30 |
| JPS626423B2 true JPS626423B2 (en) | 1987-02-10 |
Family
ID=11680999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP799679A Granted JPS55100066A (en) | 1979-01-25 | 1979-01-25 | Single transistor type converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55100066A (en) |
-
1979
- 1979-01-25 JP JP799679A patent/JPS55100066A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55100066A (en) | 1980-07-30 |
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