JPS6229992B2 - - Google Patents
Info
- Publication number
- JPS6229992B2 JPS6229992B2 JP21514181A JP21514181A JPS6229992B2 JP S6229992 B2 JPS6229992 B2 JP S6229992B2 JP 21514181 A JP21514181 A JP 21514181A JP 21514181 A JP21514181 A JP 21514181A JP S6229992 B2 JPS6229992 B2 JP S6229992B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- converter
- overvoltage
- voltage
- detection 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 14
- 238000001514 detection method Methods 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000000694 effects Effects 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
- H02M3/338—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 in a self-oscillating arrangement
Description
【発明の詳細な説明】
(1) 発明の技術分野
本発明は比較的簡易な回路構成としたフオワー
ド型多出力DC―DCコンバータの過電圧検出回路
に関する。Detailed Description of the Invention (1) Technical Field of the Invention The present invention relates to an overvoltage detection circuit for a forward type multi-output DC-DC converter having a relatively simple circuit configuration.
(2) 技術の背景
フオワード型多出力DC―DCコンバータは複数
の或いは異なる直流出力電圧が得られるため多用
されているDC―DCコンバータの制御系の故障等
により出力電圧が異常に変化したときはそれを検
知してコンバータの動作を停止させている。(2) Background of the technology Forward type multi-output DC-DC converters are often used because they can obtain multiple or different DC output voltages.If the output voltage changes abnormally due to a failure in the control system of the DC-DC converter, This is detected and the converter stops operating.
(3) 従来技術と問題点
第１図に示す従来のフオワード型２出力DC―
DCコンバータにおいて出力巻線N1，N2を有する
変圧器Ｔの入力巻線と直流電源Ｅとの間に開閉素
子としてのトランジスタTRを挿入し、その開閉
を制御回路CTLが制御している。出力巻線N1，
N2にはそれぞれ直流整流用及び平滑用ダイオー
ドD2乃至D5、エネルギー蓄積用チヨークコイル
L1，L2、平滑用コンデンサC1，C2を接続し、直
流出力＋V1，−V2を得ている。ダイオードD1はト
ランジスタTRが非導通になつたとき発生するサ
ージ電圧を制限するために挿入されている。コン
デンサC1の電圧をコンバータ出力電圧に代表さ
せ制御回路CTLに取り込み、出力電圧の上下を
抑える方向にトランジスタTRの開閉を制御す
る。過電圧検出器OVD1，OVD2を各々コンデン
サC1，C2と並列接続しておき、異常電圧特に定
格を超えた電圧を検出したとき出力信号STを発
し、制御回路CTLに印加することにより、トラ
ンジスタTRの開閉動作を停止させる。このとき
過電圧検出器OVDは各出力電圧に対応させて設
けるから部品点数が多くなる欠点があつた。また
過電圧検出器出力により制御回路を制御するため
には出力信号STの極性を基準電位（例えばグラ
ンド）に対して統一したものとする必要があり、
具体的回路構成は複雑になる欠点があつた。(3) Conventional technology and problems Conventional forward type 2-output DC shown in Figure 1 -
In the DC converter, a transistor TR as a switching element is inserted between an input winding of a transformer T having output windings N 1 and N 2 and a DC power supply E, and its switching is controlled by a control circuit CTL. Output winding N 1 ,
N 2 has diodes D 2 to D 5 for DC rectification and smoothing, and a chiyoke coil for energy storage.
L 1 , L 2 and smoothing capacitors C 1 and C 2 are connected to obtain DC outputs +V 1 and −V 2 . Diode D1 is inserted to limit the surge voltage that occurs when transistor TR becomes non-conductive. The voltage of the capacitor C1 is represented by the converter output voltage and is input into the control circuit CTL, which controls the opening and closing of the transistor TR in the direction of suppressing the rise and fall of the output voltage. Overvoltage detectors OVD 1 and OVD 2 are connected in parallel with capacitors C 1 and C 2 respectively, and when an abnormal voltage, especially a voltage exceeding the rating, is detected, an output signal ST is generated and applied to the control circuit CTL. Stops the opening/closing operation of transistor TR. At this time, the overvoltage detector OVD was provided corresponding to each output voltage, so there was a drawback that the number of parts increased. In addition, in order to control the control circuit using the overvoltage detector output, it is necessary to make the polarity of the output signal ST consistent with respect to the reference potential (for example, ground).
The drawback was that the specific circuit configuration was complicated.
(4) 発明の目的
本発明の目的は前述の欠点を改善し、比較的簡
易な回路構成の過電圧検出回路としたフオワード
型多出力DC―DCコンバータを提供することにあ
る。(4) Object of the Invention An object of the present invention is to improve the above-mentioned drawbacks and provide a forward type multi-output DC-DC converter having an overvoltage detection circuit with a relatively simple circuit configuration.
(5) 発明の構成
本発明の構成はフオワード型多出力DC―DCコ
ンバータの各直流出力の過電圧を検出しコンバー
タ動作を停止するための過電圧検出回路におい
て、各直流出力を得るエネルギー蓄積用チヨーク
コイルに設けた各別の巻線を各出力電圧を同一レ
ベルに変換できる巻数に選定し、各巻線出力を整
流後並列接続することである。(5) Structure of the Invention The structure of the present invention includes an overvoltage detection circuit for detecting overvoltage of each DC output of a forward type multi-output DC-DC converter and stopping the converter operation. The number of turns of each of the separate windings provided is selected so that each output voltage can be converted to the same level, and the outputs of each winding are connected in parallel after rectification.
(6) 発明の実施例 以下図面により本発明の実施例を説明する。(6) Examples of the invention Embodiments of the present invention will be described below with reference to the drawings.
第２図は本発明の実施例の回路構成図を第１図
と対応させて示す図で、同一符号は同様のものを
示す。第１図におけるエネルギー蓄積用チヨーク
コイルL1，L2について、２次側出力を取出すこ
とのできる別巻線を設けてn12，n22とし、原巻線
をn11，n21とする。別巻線出力を整流用ダイオー
ドD6，D7、平滑コンデンサC3により並列接続し
ておく。コンデンサC3の電圧ＶCは定格出力電圧
V1，V2においてＶC＝V1ｎ１２／ｎ１１＝V2ｎ２２／ｎ
２１
となるように巻線数n12，n22を選ぶ。単一の過電
圧検出器においてＶCの異常が検出されると、定
格出力電圧の高くなつた回路の存在することであ
り、そのときは出力信号STによりトランジスタ
TRの動作を停止させる。 FIG. 2 is a diagram showing a circuit configuration diagram of an embodiment of the present invention in correspondence with FIG. 1, and the same reference numerals indicate similar parts. Regarding the energy storage choke coils L 1 and L 2 in FIG. 1, separate windings from which the secondary side output can be taken out are provided as n 12 and n 22 , and the original windings are n 11 and n 21 . The separate winding outputs are connected in parallel using rectifier diodes D 6 and D 7 and smoothing capacitor C 3 . The voltage V C of the capacitor C 3 is at the rated output voltages V 1 and V 2 as follows: V C =V 1 n 12 /n 11 =V 2 n 22 /n
The number of windings n 12 and n 22 are selected so that the number of windings is 21 . If an abnormality in V C is detected in a single overvoltage detector, it means that there is a circuit with a higher rated output voltage, and in that case, the output signal ST will cause the transistor to
Stop TR operation.
以上はコンバータ回路が２回路の場合について
説明したが、多回路のときもコンデンサC3にお
いて並列接続することで良い。 The above description has been made for the case where there are two converter circuits, but even when there are multiple converter circuits, it is sufficient to connect them in parallel at the capacitor C3 .
(7) 発明の効果
このようにして本発明によるとコンデンサ回路
において並列接続するためチヨークコイルの巻線
数と接続極性を選択して簡易な構成で過電圧検出
回路を得ることができる。またコンバータ出力回
路数を増加させても過電圧検出器OVDの数を増
加させる必要がなく簡便である。(7) Effects of the Invention In this manner, according to the present invention, an overvoltage detection circuit can be obtained with a simple configuration by selecting the number of windings and connection polarity of the choke coils for parallel connection in a capacitor circuit. Furthermore, even if the number of converter output circuits is increased, there is no need to increase the number of overvoltage detectors OVD, which is simple.
第１図は従来の過電圧検出回路の構成図、第２
図は本発明の実施例を示す構成図である。
Ｔ…変圧器、N1，N2…出力巻線、TR…トラン
ジスタ、CTL…制御回路、L1，L2…エネルギー
蓄積用チヨークコイル、D1〜D7…ダイオード、
C1〜C3…コンデンサ、OVD…過電圧検出器。
Figure 1 is a configuration diagram of a conventional overvoltage detection circuit;
The figure is a configuration diagram showing an embodiment of the present invention. T...Transformer, N1 , N2 ...Output winding, TR...Transistor, CTL...Control circuit, L1 , L2 ...Choice coil for energy storage, D1 to D7 ...Diode,
C1 to C3 ...Capacitor, OVD...Overvoltage detector.
Claims (1)
直流出力の過電圧を検出しコンバータ動作を停止
するための過電圧検出回路において、各直流出力
を得るエネルギー蓄積用チヨークコイルに設けた
各別の巻線を各出力電圧を同一レベルに変換でき
る巻数に選定し、各巻線出力を整流後並列接続す
ることを特徴とする多出力DC―DCコンバータの
過電圧検出回路。1. In the overvoltage detection circuit for detecting overvoltage of each DC output of a forward type multi-output DC-DC converter and stopping converter operation, separate windings installed in the energy storage coils that obtain each DC output are connected to each output. An overvoltage detection circuit for a multi-output DC-DC converter characterized by selecting a number of turns that can convert the voltage to the same level, and connecting each winding output in parallel after rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21514181A JPS58119770A (en) | 1981-12-31 | 1981-12-31 | Overvoltage detector for multioutput dc/dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21514181A JPS58119770A (en) | 1981-12-31 | 1981-12-31 | Overvoltage detector for multioutput dc/dc converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58119770A JPS58119770A (en) | 1983-07-16 |
| JPS6229992B2 true JPS6229992B2 (en) | 1987-06-30 |
Family
ID=16667367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21514181A Granted JPS58119770A (en) | 1981-12-31 | 1981-12-31 | Overvoltage detector for multioutput dc/dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58119770A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601051A (en) * | 1983-12-22 | 1986-07-15 | General Electric Company | Protective circuit for X-ray generator |
| JPS6358895U (en) * | 1986-09-30 | 1988-04-19 | ||
| JPH0241687U (en) * | 1988-09-06 | 1990-03-22 |
-
1981
- 1981-12-31 JP JP21514181A patent/JPS58119770A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58119770A (en) | 1983-07-16 |
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