JPS61121772A - Rush current preventing circuit of dc stabilized power source - Google Patents

Rush current preventing circuit of dc stabilized power source

Info

Publication number
JPS61121772A
JPS61121772A JP24068384A JP24068384A JPS61121772A JP S61121772 A JPS61121772 A JP S61121772A JP 24068384 A JP24068384 A JP 24068384A JP 24068384 A JP24068384 A JP 24068384A JP S61121772 A JPS61121772 A JP S61121772A
Authority
JP
Japan
Prior art keywords
power source
rush current
resistor
voltage
output
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
Application number
JP24068384A
Other languages
Japanese (ja)
Inventor
Toshio Kobayashi
俊夫 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Lighting Ltd
Original Assignee
Hitachi Lighting Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Lighting Ltd filed Critical Hitachi Lighting Ltd
Priority to JP24068384A priority Critical patent/JPS61121772A/en
Publication of JPS61121772A publication Critical patent/JPS61121772A/en
Pending legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE:To obtain small-sized inexpensive power source by forming an auxiliary power source by the output of a rush current preventing resistor. CONSTITUTION:A commercial power source V0 is rectified by a rectifier 9 to a DC power through the primary smoothing capacitor 10 and a DC/DC converter to obtain an output voltage V2. When the commercial power source is turned ON, if an auxiliary voltage V1 stepped down and rectified by a commercial transformer 19 is generated, the converter operates to feedback the voltage of the winding 13 of a high frequency transformer 12 to conduct a switching element 4. Thus, a rush current preventing resistor 5 is shortcircuited to perform a normal operation. in this case, the voltage V1 is obtained from the output V3 of a rush current preventing resistor 5. Thus, since the output V3 of the resistor 5 is delayed by the time constant of the capacitor 10 and the resistor 5, the power V1 becomes a delay waveform to prevent the rush current when the converter is operated.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、商用トランスを用いて補助電源を構成する直
流安定化電源に係り、特に突入電流防止に好適な回路に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a DC stabilized power supply that constitutes an auxiliary power supply using a commercial transformer, and particularly to a circuit suitable for preventing inrush current.

〔発明の背景〕[Background of the invention]

従来の突入を流防止回路は、電源投入後、ＤＣ−ＤＣコ
ンバータが動作する際に大きな突入電流が流れるのを防
止するため、−次平滑コンデンサ１０が十分充電した後
、ＤＣ！−ＤＣコンバータが動作する様遅延回路を設け
ている。The conventional inrush current prevention circuit prevents a large inrush current from flowing when the DC-DC converter operates after the power is turned on. - A delay circuit is provided for the operation of the DC converter.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、特別な付加回路を付けることなく突入
電流を防止することにある。An object of the present invention is to prevent inrush current without adding a special additional circuit.

〔発明の概要〕[Summary of the invention]

本案は、突入電流防止抵抗の出力端電圧が、１次平滑回
路の時定数で遅れることから、その出力端より補助電源
を作るものである。In this case, since the output terminal voltage of the inrush current prevention resistor is delayed by the time constant of the primary smoothing circuit, an auxiliary power source is created from the output terminal.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を第１図により説明する。直流
電源は、商用電源投入時、その１次平滑コンデンサ１０
￥充電する為大きな突入電流１゜が流れる。一般に電源
投入時は、突入電流防止抵抗５で制限するが、商用トラ
ンス１９で降圧整流してＤＣ−ＤＣコンバータの補助電
圧ｖ１が生じると、ＤＣ−ＤＣコンバータが動作し、高
周波トランス１２の巻線１３より電圧を帰還し、スイッ
チ素子ルを導通させ、突入防止抵抗５を短絡し、正常動
作に移項する。この際コンデンサ１０が、十分光電され
ていないと、スイッチ素子４が導通した際（１，時〕、
大きな突入電流が流れる為、一般にコンデンサ１０が十
分光電し終るまでＤＯ−ＤＣＣコンパルが動作しないよ
う遅延回路を設けている。従来回路例では、第３図の２
２．２３゜２４．２５に示す回路で、抵抗２２．コンデ
ンサ２３の時定数できまる時間遅らせている。本発明は
突入電流防止抵抗５の出力Ｖ、が第２図に示す通り、コ
ンデンサ１０と抵抗５の時定数で遅れるため、その出力
端から、補助電源の商用トランス１９の入力をとること
により、その出力整流電圧Ｖ、は、第２図に示す通り遅
れ波形となり、ＤＣ−ＤＣコンパ＝りが動作時に大きな
突入電流が流れることを防止できる。An embodiment of the present invention will be described below with reference to FIG. When the DC power supply is turned on, its primary smoothing capacitor 10
A large inrush current of 1° flows to charge the battery. Generally, when the power is turned on, the inrush current is limited by the inrush current prevention resistor 5, but when step-down rectification is performed in the commercial transformer 19 and auxiliary voltage v1 of the DC-DC converter is generated, the DC-DC converter operates and the winding of the high-frequency transformer 12 The voltage is fed back from 13, the switch element 1 is made conductive, the inrush prevention resistor 5 is short-circuited, and normal operation is resumed. At this time, if the capacitor 10 is not sufficiently photoelectrically charged, when the switching element 4 becomes conductive (1, hour),
Since a large inrush current flows, a delay circuit is generally provided so that the DO-DCC compal does not operate until the capacitor 10 is fully charged. In the conventional circuit example, 2 in Fig. 3
In the circuit shown in 2.23°24.25, the resistor 22. The time is delayed by the time constant of the capacitor 23. In the present invention, as shown in FIG. 2, the output V of the inrush current prevention resistor 5 is delayed by the time constant of the capacitor 10 and the resistor 5, so by taking the input of the commercial transformer 19 of the auxiliary power supply from its output terminal, The output rectified voltage V has a delayed waveform as shown in FIG. 2, and it is possible to prevent a large inrush current from flowing when the DC-DC comparator is in operation.

なお−１１はＤｏ−Ｄｏコンバータの中核を成すトラン
ジスタであり−　ドライブ回路２７により例えばＰＷＭ
制御が行なわれる。１２は高周波トランス、２８は、出
力電圧Ｖ、のフィードバックによりドライブ回路２７を
制御する制御回路である０ 〔発明の効果〕 本発明は、突入電流防止抵抗の出力（降下電圧）により
補助電源を構成するものである。したがつて、本発明に
よれば、特別な回路を設けることなく突入電流を防止で
きる為、小形で安価な電源が出来る。Note that -11 is a transistor that forms the core of the Do-Do converter.
Control takes place. 12 is a high frequency transformer; 28 is a control circuit that controls the drive circuit 27 by feedback of the output voltage V; It is something to do. Therefore, according to the present invention, inrush current can be prevented without providing a special circuit, so a small and inexpensive power source can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一つの実施例を説明するための回路図
、第２図は第１図の動作を説明するための波形図、第３
図は従来の回路例を示す図、第６ｒ！￥１は第３図の動
作を説明するための波形図である。 １．３・・・コンデンサ、２・・・フィルタ、４・・・
スイッチ素子、５・・・突入電流防止抵抗、６．７．　
８゜２２・・・抵抗、９，２０．７・・・整流器、ＩＱ
、１７゜２１、　２５．２６・・・コンデンサ、１１．
２５・・・トランジスタ、１２．１！ｌ、１４．１５・
・・高周波トランス及び巻線、１６・・・整流器、１８
・・・チョーク、１９・・・商用トランス、２４・・・
ツェナーダイオード、２７・・・ドライブ回路、２８・
・・制御回路、１．・・・入力電流、Ｖ、・・・補助電
圧、■、・・・出力電圧、■。 ・・・突入抵抗出力電圧 ＄　　１　　図 弗　２　図 ｔｏ　　　　　ｔｌ 畢３図 第　４　図Figure 1 is a circuit diagram for explaining one embodiment of the present invention, Figure 2 is a waveform diagram for explaining the operation of Figure 1, and Figure 3 is a waveform diagram for explaining the operation of Figure 1.
The figure shows an example of a conventional circuit, No. 6r! ¥1 is a waveform diagram for explaining the operation of FIG. 3. 1.3... Capacitor, 2... Filter, 4...
Switch element, 5... Rush current prevention resistor, 6.7.
8゜22...Resistance, 9,20.7...Rectifier, IQ
, 17°21, 25.26... Capacitor, 11.
25...Transistor, 12.1! l, 14.15・
...High frequency transformer and winding, 16... Rectifier, 18
...Choke, 19...Commercial transformer, 24...
Zener diode, 27...drive circuit, 28.
...Control circuit, 1. ...Input current, V, ...Auxiliary voltage, ■, ...Output voltage, ■. ...Inrush resistance output voltage $1 Figure 2 Figure to tl Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 商用トランスにより補助電源を作る電源において、突入
防止抵抗の出力より、商用トランスの入力を得ることを
特徴とする、直流安定化電源の突入電源防止回路。An inrush power prevention circuit for a DC stabilized power supply, which is characterized in that, in a power supply that uses a commercial transformer to generate auxiliary power, the input of the commercial transformer is obtained from the output of an inrush prevention resistor.
JP24068384A 1984-11-16 1984-11-16 Rush current preventing circuit of dc stabilized power source Pending JPS61121772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24068384A JPS61121772A (en) 1984-11-16 1984-11-16 Rush current preventing circuit of dc stabilized power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24068384A JPS61121772A (en) 1984-11-16 1984-11-16 Rush current preventing circuit of dc stabilized power source

Publications (1)

Publication Number Publication Date
JPS61121772A true JPS61121772A (en) 1986-06-09

Family

ID=17063151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24068384A Pending JPS61121772A (en) 1984-11-16 1984-11-16 Rush current preventing circuit of dc stabilized power source

Country Status (1)

Country Link
JP (1) JPS61121772A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1322659C (en) * 2004-07-16 2007-06-20 中国科学院上海光学精密机械研究所 Low-power semiconductor laser driving power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1322659C (en) * 2004-07-16 2007-06-20 中国科学院上海光学精密机械研究所 Low-power semiconductor laser driving power supply

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