JPH0227912B2 - CHOKURYUANTEIKADENGENSOCHI - Google Patents

CHOKURYUANTEIKADENGENSOCHI

Info

Publication number
JPH0227912B2
JPH0227912B2 JP15781583A JP15781583A JPH0227912B2 JP H0227912 B2 JPH0227912 B2 JP H0227912B2 JP 15781583 A JP15781583 A JP 15781583A JP 15781583 A JP15781583 A JP 15781583A JP H0227912 B2 JPH0227912 B2 JP H0227912B2
Authority
JP
Japan
Prior art keywords
voltage
thyristor
input
transistor
rectifier
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 - Lifetime
Application number
JP15781583A
Other languages
Japanese (ja)
Other versions
JPS6051459A (en
Inventor
Toshio Kobayashi
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 JP15781583A priority Critical patent/JPH0227912B2/en
Publication of JPS6051459A publication Critical patent/JPS6051459A/en
Publication of JPH0227912B2 publication Critical patent/JPH0227912B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • Control Of Voltage And Current In General (AREA)
  • Dc-Dc Converters (AREA)

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は突入電流を防止した直流安定化電源装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a DC stabilized power supply device that prevents rush current.

〔発明の背景〕[Background of the invention]

直流電源装置における従来の突入電流防止装置
は第１図に示すように、入力交流電圧１を加える
と整流器２を通して保護用サイリスタ３と並列に
接続した過電流防止用の抵抗４を経てコンデンサ
５を充電し、変圧器６の１次巻線７に接続したス
イツチングトランジスタ８を開閉させ、変圧器６
の２次巻線９から整流器１０を通して上記サイリ
スタ３に導通信号を与え、抵抗４を短絡して定常
状態に移行し突入電流を防止していた。なお図に
おいて１２，１３，１４，１５は出力フイルタを
構成し、１６はドライブ回路、１７はパスル幅制
御回路、１８は出力帰還回路をそれぞれ示してい
る。第２図は第１図に示す回路の動作波形を示す
図である。t1で電源を投入すると入力電圧Ａに対
して抵抗４で制限された突入電流Ｂが流れ、t2後
にスイツチングトランジスタ８が開閉し、変圧器
６の２次巻線９の発生電圧を整流器１０で変換し
た直流がＣに示すようにサイリスタ３を導通させ
る。本突入電流防止装置は電源のON−OFF間隔
が長いt3〜t5のOFF期間中にはコンデンサ５の電
荷が消滅するので上記の動作が繰返して行われる
が、OFFの期間がt7〜t8のように短い場合には電
源がOFFであつてもコンデンサ５の電荷が残つ
ているため、上記スイツチングトランジスタ８は
動作しておりサイリスタ３には波形Ｃに示すよう
に点弧信号を流しつづけている。したがつて電源
をONにした場合にサイリスタ３は即時導通する
ので、コンデンサ５は入力電圧とコンデンサ５と
の電圧差によつて充電され、過大な突入電流が流
れて回路の各部分にストレスを与えるという欠点
があつた。 As shown in Fig. 1, a conventional inrush current prevention device for a DC power supply device is such that when an input AC voltage 1 is applied, it passes through a rectifier 2, a protection thyristor 3, and an overcurrent prevention resistor 4 connected in parallel to a capacitor 5. The switching transistor 8 connected to the primary winding 7 of the transformer 6 is opened and closed, and the transformer 6 is charged.
A conduction signal is given to the thyristor 3 from the secondary winding 9 of the thyristor 3 through the rectifier 10, and the resistor 4 is short-circuited to shift to a steady state and prevent inrush current. In the figure, 12, 13, 14, and 15 constitute output filters, 16 a drive circuit, 17 a pulse width control circuit, and 18 an output feedback circuit, respectively. FIG. 2 is a diagram showing operating waveforms of the circuit shown in FIG. 1. When the power is turned on at t 1 , an inrush current B limited by the resistor 4 flows against the input voltage A, and after t 2 , the switching transistor 8 opens and closes, and the voltage generated in the secondary winding 9 of the transformer 6 is converted into a rectifier. The DC converted at 10 makes the thyristor 3 conductive as shown at C. In this inrush current prevention device, the charge on the capacitor 5 disappears during the OFF period from t3 to t5 , where the power supply ON-OFF interval is long, so the above operation is repeated, but the OFF period is from t7 to t5. When t8 is short, the charge in the capacitor 5 remains even when the power is off, so the switching transistor 8 is operating and a firing signal is sent to the thyristor 3 as shown in waveform C. It keeps flowing. Therefore, when the power is turned on, the thyristor 3 immediately conducts, and the capacitor 5 is charged by the voltage difference between the input voltage and the capacitor 5, causing an excessive rush current to flow and stressing various parts of the circuit. I had the disadvantage of giving.

〔発明の目的〕[Purpose of the invention]

本発明は突入電流を確実に防止する直流電源装
置を得ることを目的とする。 An object of the present invention is to obtain a DC power supply device that reliably prevents inrush current.

〔発明の概要〕[Summary of the invention]

本発明による直流安定化電源装置は、入力交流
電圧からの直流電圧を形成する整流器と、過電流
防止抵抗とこれに並列に接続された保護用サイリ
スタと、変圧器の１次巻線を開閉するスイツチン
グトランジスタとを設け、変圧器の２次巻線から
整流器を経て上記サイリスタのゲートに導通信号
を与えて突入電流を防止する直流安定化電源装置
において、入力交流電圧の停電信号を検知して上
記サイリスタを非導通にするトランジスタと、入
力交流電圧印加の一定時間後に上記サイリスタの
動作を復帰させる時定数回路とを備えたことによ
り、入力交流電圧の供給停止から再印加の一定時
間後までサイリスタを非導通の状態に保ち、入力
交流電圧印加時の突入電流を防止したものであ
る。 The DC stabilized power supply device according to the present invention includes a rectifier that forms a DC voltage from an input AC voltage, an overcurrent prevention resistor, a protective thyristor connected in parallel to the overcurrent prevention resistor, and a primary winding of a transformer that opens and closes. In a DC stabilized power supply device that is equipped with a switching transistor and provides a conduction signal from the secondary winding of the transformer through the rectifier to the gate of the thyristor to prevent rush current, a power failure signal of the input AC voltage is detected. By including a transistor that makes the thyristor non-conductive and a time constant circuit that restores the operation of the thyristor after a certain period of time after the input AC voltage is applied, the thyristor can be operated from the time when the supply of the input AC voltage is stopped until after the certain period of time when the input AC voltage is reapplied. is kept in a non-conducting state to prevent rush current when input AC voltage is applied.

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

本発明の実施例を図面とともに説明する。第３
図は本発明による直流安定化電源装置の一実施例
を示す回路図である。図において入力交流電圧１
から直流電圧を形成する整流器２と過電流防止抵
抗４とこれに並列に接続された保護用サイリスタ
３とコンデンサ５とよりなる閉回路を、変圧器６
の１次巻線７およびこの１次巻線７を開閉するス
イツチングトランジスタ８と並列に接続し、上記
変圧器６の２次巻線９の一端は整流器１０を経て
サイリスタ３のゲートに接続し、２次巻線９の他
端は抵抗１１を経てサイリスタ３のカソードに接
続している。本実施例では上記閉回路の整流器２
側に抵抗１９，２０およびコンデンサ２１よりな
る時定数回路を接続し、さらに抵抗２４を介して
トランジスタ２３を並列に設け、トランジスタ２
３のコレクタおよびベースを上記サイリスタ３の
カソードおよび時定数回路の各抵抗１９，２０と
コンデンサ２１の接続点にそれぞれ接続してい
る。なおトランジスタ２３のエミツタはサイリス
タ３のゲ−トに接続されるとともに、抵抗２２を
介してトランジスタ２３のコレクタおよびサイリ
スタ３のカソードに接続されている。図において
１２，１３，１４，１５は出力フイルタを構成
し、１６はドライブ回路、１７はパスル幅制御回
路、１８は出力帰還回路をそれぞれ示している。 Embodiments of the present invention will be described with reference to the drawings. Third
The figure is a circuit diagram showing an embodiment of a DC stabilized power supply device according to the present invention. In the figure, input AC voltage 1
A closed circuit consisting of a rectifier 2 that forms a DC voltage, an overcurrent prevention resistor 4, a protective thyristor 3 and a capacitor 5 connected in parallel to the rectifier 2 is connected to a transformer 6.
The primary winding 7 of the transformer 6 is connected in parallel with the switching transistor 8 that opens and closes the primary winding 7, and one end of the secondary winding 9 of the transformer 6 is connected to the gate of the thyristor 3 via a rectifier 10. , the other end of the secondary winding 9 is connected to the cathode of the thyristor 3 via a resistor 11. In this embodiment, the closed circuit rectifier 2
A time constant circuit consisting of resistors 19, 20 and a capacitor 21 is connected to the side, and a transistor 23 is connected in parallel via a resistor 24.
The collector and base of thyristor 3 are connected to the cathode of the thyristor 3 and the connection point between each of the resistors 19 and 20 of the time constant circuit and the capacitor 21, respectively. The emitter of the transistor 23 is connected to the gate of the thyristor 3, and is also connected to the collector of the transistor 23 and the cathode of the thyristor 3 via the resistor 22. In the figure, 12, 13, 14, and 15 constitute output filters, 16 a drive circuit, 17 a pulse width control circuit, and 18 an output feedback circuit, respectively.

入力交流電圧１の供給が停止されると整流器２
の出力が零になるため抵抗２０の電位も零にな
り、コンデンサ５の電荷は抵抗２４、トランジス
タ２３のエミツターベース間および抵抗２０を通
しベース電流を流してトランジスタ２３を導通さ
せ、サイリスタ３のゲートーカソード間を短絡さ
せる。入力交流電圧１を印加すると抵抗１９，２
０およびコンデンサ２１よりなる時定数回路によ
り一定時間後にトランジスタ２３のベース電位が
上昇し、エミツタ電位よりベ−ス電位が高くなつ
た点で上記トランジスタ２３のコレクターエミツ
タ間がOFFになる。上記の入力交流電圧１の印
加時からトランジスタ２３のコレクターエミツタ
間がOFFになるまでの一定時間内はサイリスタ
３が確実にOFFになつているため、入力交流電
圧１を短い時間でONにしても入力交流電圧１の
印加による突入電流は過電流防止抵抗４を通して
流れることになり低い値に抑えることができる。
トランジスタ２３のコレクタ−エミツタ間が
OFFになるとスイツチングトランジスタ８の開
閉によつて変圧器６の２次巻線９の電圧が、整流
器１０で整流されサイリスタ３のゲートに信号と
して与えられサイリスタ３が導通し定常状態にな
る。 When the supply of input AC voltage 1 is stopped, the rectifier 2
Since the output of the resistor 20 becomes zero, the potential of the resistor 20 also becomes zero, and the charge in the capacitor 5 causes a base current to flow between the resistor 24, the emitter-base of the transistor 23, and through the resistor 20, making the transistor 23 conductive, and the thyristor 3 becomes conductive. Short circuit between gate and cathode. When input AC voltage 1 is applied, resistors 19 and 2
After a certain period of time, the base potential of the transistor 23 rises due to a time constant circuit consisting of 0 and the capacitor 21, and at the point where the base potential becomes higher than the emitter potential, the voltage between the collector and emitter of the transistor 23 is turned off. Since the thyristor 3 is reliably OFF for a certain period of time from when the input AC voltage 1 is applied until the collector-emitter of the transistor 23 is turned OFF, the input AC voltage 1 is turned ON for a short period of time. Also, the rush current caused by the application of the input AC voltage 1 flows through the overcurrent prevention resistor 4, so that it can be suppressed to a low value.
Between the collector and emitter of the transistor 23
When turned OFF, the voltage of the secondary winding 9 of the transformer 6 is rectified by the rectifier 10 by opening and closing the switching transistor 8, and is applied as a signal to the gate of the thyristor 3, so that the thyristor 3 becomes conductive and enters a steady state.

〔発明の効果〕〔Effect of the invention〕

上記のように本発明による直流安定化電源装置
は、入力交流電圧から直流電圧を形成する整流器
と、過電流防止抵抗とこれに並列に接続された保
護用サイリスタと、変圧器の１次巻線を開閉する
スイツチングトランジスタとを設け、変圧器の２
次巻線から整流器を経て上記サイリスタのゲート
に導通信号を与えて突入電流を防止する直流安定
化電源装置において、入力交流電圧の停電信号を
検知して上記サイリスタを非導通にするトランジ
スタと、入力交流電圧印加の一定時間後に上記サ
イリスタの動作を復帰させる時定数回路とを備え
たことにより、入力交流電圧の供給が停止すると
上記トランジスタがベ−ス電流を流してサイリス
タをOFF状態にし、この状態はつぎに入力交流
電圧が印加されて時定数回路により一定時間後に
上記トランジスタのコレクタ−エミツタ間が
OFFするまで継続し、その間、突入電流は必ず
過電流防止抵抗を通つて流れ低い値に抑えられる
から、突入電流を確実に防止でき、入力回路部品
に過大なストレスを与えることがなく信頼性が高
い直流安定化電源装置を得ることができる。 As described above, the DC stabilized power supply device according to the present invention includes a rectifier that forms a DC voltage from an input AC voltage, an overcurrent prevention resistor, a protective thyristor connected in parallel to the overcurrent prevention resistor, and a primary winding of a transformer. A switching transistor is provided to open and close the transformer.
In a DC stabilized power supply device that prevents inrush current by applying a conduction signal from the next winding to the gate of the thyristor via a rectifier, the input AC voltage transistor detects a power failure signal and makes the thyristor non-conductive; Equipped with a time constant circuit that restores the operation of the thyristor after a certain period of time after application of AC voltage, when the supply of input AC voltage is stopped, the transistor flows a base current to turn the thyristor into an OFF state, and this state is maintained. Next, the input AC voltage is applied, and after a certain period of time, the voltage between the collector and emitter of the above transistor is changed by the time constant circuit.
The inrush current continues until it turns OFF, and during that time, the inrush current always flows through the overcurrent prevention resistor and is suppressed to a low value, so inrush current can be reliably prevented and reliability is maintained without putting excessive stress on the input circuit components. A highly stabilized DC power supply device can be obtained.

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

第１図は従来の突入電流を防止した直流電源装
置の回路図、第２図は上記回路の動作波形を示す
図、第３図は本発明による直流安定化電源装置の
一実施例を示す回路図である。 １……入力交流電圧、２……整流器、３……保
護用サイリスタ、４……過電流防止抵抗、６……
変圧器、７……１次巻線、８……スイツチングト
ランジスタ、９……２次巻線、１９，２０，２１
……時定数回路、２３……トランジスタ。 Fig. 1 is a circuit diagram of a conventional DC power supply device that prevents inrush current, Fig. 2 is a diagram showing operating waveforms of the above circuit, and Fig. 3 is a circuit diagram showing an embodiment of a DC stabilized power supply device according to the present invention. It is a diagram. 1... Input AC voltage, 2... Rectifier, 3... Protective thyristor, 4... Overcurrent prevention resistor, 6...
Transformer, 7...Primary winding, 8...Switching transistor, 9...Secondary winding, 19, 20, 21
...Time constant circuit, 23...Transistor.

Claims (1)

【特許請求の範囲】[Claims] １ 入力交流電圧から直流電圧を形成する整流器
と、過電流防止抵抗とこれに並列に接続された保
護用サイリスタと、変圧器の１次巻線を開閉する
スイツチングトランジスタとを設け、変圧器の２
次巻線から上記サイリスタのゲートに導通信号を
与えて突入電流を防止する直流安定化電源装置に
おいて、入力交流電圧の停電信号を検知して上記
サイリスタを非導通にするトランジスタと、入力
交流電圧印加の一定時間後に上記サイリスタの動
作を復帰させる時定数回路とを備えたことを特徴
とする直流安定化電源装置。1. A rectifier that forms a DC voltage from an input AC voltage, an overcurrent prevention resistor, a protective thyristor connected in parallel to this, and a switching transistor that opens and closes the primary winding of the transformer. 2
A DC stabilized power supply device that prevents inrush current by applying a conduction signal from the next winding to the gate of the thyristor includes a transistor that detects a power failure signal of the input AC voltage and makes the thyristor non-conductive, and a transistor for applying the input AC voltage. and a time constant circuit for restoring the operation of the thyristor after a certain period of time.
JP15781583A 1983-08-31 1983-08-31 CHOKURYUANTEIKADENGENSOCHI Expired - Lifetime JPH0227912B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15781583A JPH0227912B2 (en) 1983-08-31 1983-08-31 CHOKURYUANTEIKADENGENSOCHI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15781583A JPH0227912B2 (en) 1983-08-31 1983-08-31 CHOKURYUANTEIKADENGENSOCHI

Publications (2)

Publication Number Publication Date
JPS6051459A JPS6051459A (en) 1985-03-22
JPH0227912B2 true JPH0227912B2 (en) 1990-06-20

Family

ID=15657897

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15781583A Expired - Lifetime JPH0227912B2 (en) 1983-08-31 1983-08-31 CHOKURYUANTEIKADENGENSOCHI

Country Status (1)

Country Link
JP (1) JPH0227912B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264988A (en) * 1986-07-19 1993-11-23 Ken Hayashibara Circuit to limit surges into a dc-operated lamp
JPH01278258A (en) * 1988-04-27 1989-11-08 Toko Inc Switching power source
US5886892A (en) * 1997-12-05 1999-03-23 Hewlett-Packard Company Power supply with improved inrush circuit for limiting inrush current

Also Published As

Publication number Publication date
JPS6051459A (en) 1985-03-22

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