JPS60249868A - Starting circuit of switching power source - Google Patents
Starting circuit of switching power sourceInfo
- Publication number
- JPS60249868A JPS60249868A JP10593284A JP10593284A JPS60249868A JP S60249868 A JPS60249868 A JP S60249868A JP 10593284 A JP10593284 A JP 10593284A JP 10593284 A JP10593284 A JP 10593284A JP S60249868 A JPS60249868 A JP S60249868A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- diode
- control circuit
- transistor
- 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.)
- Granted
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、信頼度の高い起動回路を持つスイッチング電
源に関する・
従来のこの種の起動回路は、第１図に示す通り、商用電
源を整流して作られた直流電源Ｅ１を主トランジスタＴ
Ｒ３０オン・オフにより変換された高周波交流電力をト
ランスＴ、の一次巻線Ｎ１に供給し、トランスＴＩの補
助巻線Ｎ３より、ダイオードＤ１を通して、制御回路Ｂ
１用直流電源端子とコンデンサＣ１に接続されると共に
、起動時に必要な電流を供給するための、電圧スイッチ
のトランジスタＴＲ４と定電圧ダイオードＺＤ２と抵抗
Ｒ７と抵抗Ｒ８によって構成されていた〇
しかし、主トランジスタＴＲ５の駆動に必要な電力は、
低い電圧（数ボルト）でよいが、比較的大きい電流（ｖ
ｉ７′、・ペア）が必要であるため、起動時の短時間に
、抵抗１（、ａとトランジスタＴＲ４に、高い電圧であ
る直流電源Ｅ１の電圧が印加され大きな電力消費（実際
には１００Ｖ Ｘ ＩＡ＝ １００Ｗ程度）があるが、
短時間であるため、数ワット定格の部品を使用していた
。[Detailed Description of the Invention] The present invention relates to a switching power supply having a highly reliable starting circuit. A conventional starting circuit of this type is a DC power supply made by rectifying a commercial power supply, as shown in Fig. 1. E1 is the main transistor T
The high-frequency AC power converted by R30 on/off is supplied to the primary winding N1 of the transformer T, and then from the auxiliary winding N3 of the transformer TI to the control circuit B through the diode D1.
It is connected to the DC power supply terminal for 1 and the capacitor C1, and is composed of a voltage switch transistor TR4, a constant voltage diode ZD2, a resistor R7, and a resistor R8 to supply the necessary current at startup. However, the main The power required to drive transistor TR5 is
A low voltage (several volts) is required, but a relatively large current (v
i7', · pair), the high voltage of the DC power supply E1 is applied to the resistor 1 (, a) and the transistor TR4 for a short time at startup, resulting in large power consumption (actually 100V IA = about 100W), but
Due to the short duration, components rated for several watts were used.
このため、なんらかの異常によって補助巻ｌ５Ｎ３の電
力供給が停止した場合は、抵抗Ｒ８とトランジスタＴＲ
４が焼損！７て火災につながるなどの大きな欠点があっ
た。Therefore, if the power supply to the auxiliary winding l5N3 is stopped due to some abnormality, the resistor R8 and transistor TR
4 was burnt out! It had major drawbacks, such as the fact that it could cause a fire.
本発明は、上記従来回路の欠点を改良して、高耐圧、大
容量の部品を使用せずとも所定の性能を維持シつるスイ
ッチングＮ源の起動回路を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to improve the drawbacks of the conventional circuit described above and to provide a switching N source starting circuit that maintains a predetermined performance without using high-voltage, large-capacity components.
本発明は高電圧・小電流から、低電圧・大電流の電、力
に変換する方法として、１ｏｏｍＳ程度の時間ヲカケて
１００μＦ程度のコンデンサＣ１に５ｍＡ程度の電流で
電荷を充電して、５Ｖ程度の電圧を１００μｓ程度の時
間約１人の電流をノぜワートランジスタＴＲ３の駆動用
の制御回路Ｂ１に電力を供給することで、高耐圧・大電
流の定格の部品を必要としないことを特徴とするもので
ある。The present invention is a method for converting high voltage and small current into low voltage and large current power, by charging a capacitor C1 of about 100 μF with a current of about 5 mA over a time period of about 1 ooms, and generating an electric charge of about 5 V. By supplying power to the control circuit B1 for driving the nozzle transistor TR3 with a voltage of about 1 current for a period of about 100 μs, there is no need for components rated for high voltage and large current. It is something to do.
第２図は、本発明の一実施例に係る回路図でこれについ
て説明する・
直流電源Ｅｌの高い電圧より高い抵抗器Ｒ１により小電
流をコンデンサＣ１に充電するようＯこ接続する。コン
デンサＣ，の電圧を検出すると同じに、定められた電圧
でオン・オフするところσ）トランジスタＴＲ＋と、Ｔ
Ｒ，２と、定電圧ダイオ−）−ＺＤ＋と、ＺＤ５ 、！
：、抵抗ＲＪ 、！：、ｌ（，５ト、Ｒ６ニ、Ｊ： −
）テ構ｅ、 サれた電圧ヒステリシスを持つスイッチ回
路によって、コンデンサＣ１の電力を、主トランジスタ
ＴＲ３を駆動する制御回路Ｂｌに供給するように接続す
る・主トランジスタにより直流電源Ｅｌの電力を交流に
変換して、トランスＴ１に供給するように１次巻線Ｎ１
に接続する。制御回路Ｂ１に電力を供給するために、補
助巻線Ｎ５より、ダイオードｌ）＋を通して、コンデン
サＣ１に接続する。FIG. 2 is a circuit diagram according to an embodiment of the present invention, which will be explained below. A resistor R1, which is higher than the high voltage of the DC power supply El, is connected to charge a small current into the capacitor C1. In the same way as detecting the voltage of capacitor C, transistors TR+ and T turn on and off at a predetermined voltage.
R,2, constant voltage diode)-ZD+, ZD5,!
:, resistance RJ,! :,l(,5t,R6d,J: -
) Technique e. Connect the power of the capacitor C1 to be supplied to the control circuit Bl that drives the main transistor TR3 by a switch circuit with a voltage hysteresis. - The main transistor converts the power of the DC power supply El to AC. The primary winding N1 is converted to supply the transformer T1.
Connect to. To supply power to the control circuit B1, an auxiliary winding N5 is connected through a diode l)+ to a capacitor C1.
このように構成された第２図の回路図の動作内容を第３
図をもちいて説明する。直流電圧Ｅｌカー印加されると
抵抗Ｒ１を通して、数ｍＡ程度の電流を流すことにより
、コンデンサＣ１の電圧Ｅ２）よ、除々に上昇して、数
１００ｍ８程度の時間で、定電圧夕。The operation contents of the circuit diagram of FIG. 2 configured in this way are explained in the third section.
Explain using diagrams. When a DC voltage El is applied, a current of several mA flows through the resistor R1, so that the voltage E2) of the capacitor C1 gradually rises and reaches a constant voltage in a period of about several hundred m8.
イオードＺＤ＋のツェナー電圧Ｖ１に達した時、トラン
ジスタＴＲ２のベースに電流が流れてトランジスタＴＲ
２がオンすることにより、抵抗Ｒ６を通して、トランジ
スタＴ）（・１のベースにも電流が流れトランジスタＴ
ＲＩもオンするＯ
トランジスタＴＲ１がオンすると、制御回路引の電圧が
印加されて、主トランジスタＴＲ３を駆動する。このと
ぎ、主トランジスタＴＲ５を駆動する数Ａの大きな電流
が、制御回路Ｂ１を通して、主トランジスタＴＲ，３の
ベースに流れるため・コンデンサＣＩの電圧Ｅ２は数１
００μｓの短時間に数Ｖもの電圧が急速に降下してしま
うが、トランジスタＴＲＩのフレフタより定電圧ダイオ
ードＺＤ３を通して、トランジスタＴＲ２０ベースに電
流を流すため・定電圧ダイオードＺＤＫのツェナー電圧
ｖ２を、定電圧ダイオードＺＤ＋のツェナー電圧Ｖｌよ
り小さくしてあれば、コンデンサＣ１の電圧が定電圧ダ
イオードＺＤ３のツェナー電圧■２まで、トランジスタ
ＴＲ，１オンしつづける。この間数１００μｓの短時間
に、主トランジスタＴＲ３が駆動され直流電源Ｅ１の電
力を、数１０ ＫＨｚの高周波の電力が、トランスＴｌ
σ）１次巻線Ｎ１に供給されることで、補助巻線Ｎ３の
１０Ｖ程度の低い電圧で数Ａ程度の大きな電流を、夕。When the Zener voltage V1 of the diode ZD+ is reached, a current flows to the base of the transistor TR2 and the transistor TR
When transistor 2 turns on, current also flows through the resistor R6 to the base of transistor T) (・1).
RI also turns on. When the transistor TR1 turns on, a voltage from the control circuit is applied to drive the main transistor TR3. At this point, a large current of several A that drives the main transistor TR5 flows through the control circuit B1 to the base of the main transistor TR,3, so that the voltage E2 of the capacitor CI is
The voltage of several volts drops rapidly in a short period of 00 μs, but in order to flow current from the left of the transistor TRI to the base of the transistor TR20 through the constant voltage diode ZD3, the Zener voltage v2 of the constant voltage diode ZDK is changed to the constant voltage. If the zener voltage Vl of the diode ZD+ is made smaller, the transistor TR1 continues to be turned on until the voltage of the capacitor C1 reaches the zener voltage 2 of the constant voltage diode ZD3. During this time, the main transistor TR3 is driven in a short period of several hundred μs, and the power of the DC power source E1 is transferred to the high frequency power of several tens of KHz, which is transferred to the transformer Tl.
σ) By being supplied to the primary winding N1, a large current of about several A is generated at a low voltage of about 10 V of the auxiliary winding N3.
イオードＤ１ヲ通して、コンデンサＣ１に充電されるこ
とで、コンデンサＣ１の電圧Ｅ２が１０Ｖ程度まで上昇
することができるＯ
もしも、本発明回路でなんらかの異常によって、補助巻
１！Ｎ３の電圧Ｅ４が供給されない場合は、第４図の通
り、コンデンサＣ１の電圧Ｅ２は、′Ｉ＆ｉｏ。By charging the capacitor C1 through the diode D1, the voltage E2 of the capacitor C1 can rise to about 10V. If the voltage E4 of N3 is not supplied, the voltage E2 of capacitor C1 is 'I&io', as shown in FIG.
ｍ８程度の充電時間後、定電圧ダイオードＺＤ＋のツェ
ナー電圧Ｖｌより、定電圧ダイオードＺＤ３のツェナー
電圧Ｖ２の電圧まで降下する間、制御回路Ｂ１にＥ３の
電圧が供給されるが、定電圧ダイオードＺＤ３のツェナ
ー電圧Ｖ２以下に、コンデンサＣ１の電圧が降下すると
、定電圧ダイオードＺＤ３からの電流も停止するため、
トランジスタＴＲ２がオフして、トランジスタＴＲｓも
オフする。その後コンデンサＣ１の放電流がなくなるた
め、抵抗Ｒ１より、直流電源Ｅ１より数ｍＡの小さい電
流で、コンデンサＣ１に再充電するため、定電圧ダイオ
ードＺＩ）Ｉのツェナー電圧Ｖ１まで除々に上昇する。After a charging time of about m8, the voltage of E3 is supplied to the control circuit B1 while the Zener voltage Vl of the constant voltage diode ZD+ drops to the Zener voltage V2 of the constant voltage diode ZD3. When the voltage of capacitor C1 drops below Zener voltage V2, the current from constant voltage diode ZD3 also stops.
Transistor TR2 is turned off, and transistor TRs is also turned off. Thereafter, since the discharge current of the capacitor C1 disappears, the capacitor C1 is recharged by the resistor R1 with a current several mA smaller than that of the DC power source E1, so that the voltage gradually rises to the Zener voltage V1 of the constant voltage diode ZI)I.
このため、制御回路Ｂ１には、第４図の電圧Ｅ３のよう
に、数１００ｍ８程度のオフ時間で数１００μｓ程度の
オン時間のパルス電圧が供給されることになり、この繰
り返しですべての部品は、定格内で使用されるため、焼
損などの危検がまったくない回路構成である。Therefore, the control circuit B1 is supplied with a pulse voltage having an off time of several 100 m8 and an on time of several 100 μs, such as the voltage E3 in Fig. 4, and by repeating this, all the components are Since it is used within the rated value, the circuit configuration is completely free from dangers such as burnout.
また、従来回路のトランジスタＴＲ４は、数１００Ｖ耐
圧で数人定格のトランジスタが必要であったのに対して
、本発明回路のトランジスタＴＲ＋ば、数１０Ｖで数人
定格で良いことになり、価格面でも有利である〇
また、電圧ヒステリシスを持つスイッチ回路は第６図の
通りオン・オフする電圧が、上昇する時と下降する時と
別の電圧を持つ回路のことで、第２図のトランジスタＴ
Ｒ＋とＴＲ２と定電圧ダイオードＺｌ）ＩとＺｎ２と抵
抗Ｒ３とＲ５とＲ６で構成される回路の他に、第５図の
通り、トランジスタＴＲＩとＴＲ２と、定電圧ダイオー
ドＺｌ）Ｉと抵抗Ｒ２とＲ３とＲ４とＲ５とＹＬ６で構
成される回路など、その他多の回路を使用しても第２図
の場合と同様の効果を得ることができる。In addition, whereas the transistor TR4 in the conventional circuit required a transistor with a withstand voltage of several hundred V and a rating for several people, the transistor TR+ in the circuit of the present invention requires only a few tens of V and a rating for several people. Also, a switch circuit with voltage hysteresis is a circuit in which the on/off voltage has different voltages when rising and falling, as shown in Figure 6, and the transistor T shown in Figure 2.
In addition to the circuit consisting of R+, TR2, constant voltage diode Zl)I, Zn2, resistors R3, R5, and R6, as shown in Fig. 5, transistors TRI and TR2, constant voltage diode Zl)I, resistor R2, The same effect as in the case of FIG. 2 can be obtained even if many other circuits are used, such as a circuit composed of R3, R4, R5, and YL6.
第５図に示す回路の場合Ｖ２のｒ４圧は、定電圧ダイオ
ードＺＤ３のツェナー直圧でなく、トランジスタＴＲ２
０ベース・エミッタ順電圧を利用して、抵抗Ｒ３とＲ４
の値で設定することが出来る・また、同様に・定電圧ダ
イオードＺＤ＋も、抵抗におきかえることも可能である
。In the circuit shown in FIG. 5, the r4 voltage of V2 is not the Zener direct voltage of the constant voltage diode ZD3, but the voltage of the transistor TR2.
Using the 0 base-emitter forward voltage, resistors R3 and R4
It is also possible to similarly replace the constant voltage diode ZD+ with a resistor.
また、本発明回路においては、起動時の起動時間が長く
なるが、数１ｏｏｍｓ程度時間であるため実用上まった
く問題にならない。Further, in the circuit of the present invention, the startup time at startup is long, but since it takes about several ooms, it does not pose any practical problem.
以上に記述のごとく、本発明は、安全性の高い、スイッ
チング電源を、低価格で、提供することができる・さら
に、人力電源の突入電流も小さくできる〇As described above, the present invention can provide a highly safe switching power supply at a low price.Furthermore, the inrush current of a human power supply can be reduced.
第１図は従来の起動回路を示す図、第２図は本発明の一
実施例に係る起動回路を示す図、第３図は第２図の回路
の起動時の電圧波形を示す図、第４図は第２図の回路の
異常時の電圧波形を示す図、第５図は本発明の他の実施
例に係る起動回路を示す図、第６図は電圧ヒステリシス
特性を示す図である。
代理人 弁理士 高 石 橘 馬ノ、’、：’、；；、
、１、′ び
葛 ｌ閉
茅３図 第４図
第１
第 ６ 図
出力電圧
入力恒フＬ1 is a diagram showing a conventional starting circuit, FIG. 2 is a diagram showing a starting circuit according to an embodiment of the present invention, FIG. 3 is a diagram showing a voltage waveform at the time of starting the circuit of FIG. FIG. 4 is a diagram showing a voltage waveform in the case of an abnormality in the circuit of FIG. 2, FIG. 5 is a diagram showing a starting circuit according to another embodiment of the present invention, and FIG. 6 is a diagram showing voltage hysteresis characteristics. Agent Patent Attorney Takaishi Tachibana Umano,',:',;;,
, 1,' Bikatsu l Closure 3 Fig. 4 Fig. 1 Fig. 6 Output voltage input constant voltage L
Claims (1)
のオフ・オフ時間の比の調整によって・トランスの二次
巻線に接続された負荷への電力を制御するスイッチング
電源の起動回路において、起動電力を蓄積するコンデン
サと、起動電流を流す抵抗または半導体素子と、電圧ヒ
ステリシスを持つスイッチと、主トランジスタを駆動す
る制御回路と、制御回路用電像に菫、力を供給するトラ
ンスの補助巻線によって構成したことを特徴とするスイ
ッチング電源の起動回路。By adjusting the off-off time ratio of the main transistor connected in series to the transformer's primary winding, the starting power is A capacitor that stores the power, a resistor or semiconductor element that allows the starting current to flow, a switch that has voltage hysteresis, a control circuit that drives the main transistor, and an auxiliary winding of the transformer that supplies power to the control circuit voltage. A starting circuit for a switching power supply characterized by the following configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10593284A JPS60249868A (en) | 1984-05-25 | 1984-05-25 | Starting circuit of switching power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10593284A JPS60249868A (en) | 1984-05-25 | 1984-05-25 | Starting circuit of switching power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60249868A true JPS60249868A (en) | 1985-12-10 |
| JPH0465633B2 JPH0465633B2 (en) | 1992-10-20 |
Family
ID=14420622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10593284A Granted JPS60249868A (en) | 1984-05-25 | 1984-05-25 | Starting circuit of switching power source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60249868A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083254A (en) * | 1989-09-29 | 1992-01-21 | Siemens Aktiengesellschaft | Starting circuit for a switching power supply having switching means responsive to a shutoff command |
| WO2003103121A1 (en) * | 2002-05-30 | 2003-12-11 | サンケン電気株式会社 | Converter |
-
1984
- 1984-05-25 JP JP10593284A patent/JPS60249868A/en active Granted
Non-Patent Citations (1)
| Title |
|---|
| SIEMENS APPLICATION NOTE SWITCHED-MODE POWER SUPPLIES USING THE TDA4600=1981 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083254A (en) * | 1989-09-29 | 1992-01-21 | Siemens Aktiengesellschaft | Starting circuit for a switching power supply having switching means responsive to a shutoff command |
| WO2003103121A1 (en) * | 2002-05-30 | 2003-12-11 | サンケン電気株式会社 | Converter |
| US7221128B2 (en) | 2002-05-30 | 2007-05-22 | Sanken Electric Co., Ltd. | Converter with start-up circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0465633B2 (en) | 1992-10-20 |
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| JPH1056732A (en) | Rush current limiting circuit |