JPS60121961A - Switching circuit - Google Patents

Switching circuit

Info

Publication number
JPS60121961A
JPS60121961A JP22649583A JP22649583A JPS60121961A JP S60121961 A JPS60121961 A JP S60121961A JP 22649583 A JP22649583 A JP 22649583A JP 22649583 A JP22649583 A JP 22649583A JP S60121961 A JPS60121961 A JP S60121961A
Authority
JP
Japan
Prior art keywords
inductor
transistor
resistor
capacitor
base
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
Application number
JP22649583A
Other languages
Japanese (ja)
Other versions
JPH0350507B2 (en
Inventor
Hiroshi Fujii
浩史 藤井
Mitsuho Kotabe
小田部　光保
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.)
Toshiba Electric Equipment Corp
Toshiba Denzai KK
Original Assignee
Toshiba Electric Equipment Corp
Toshiba Denzai KK
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 Toshiba Electric Equipment Corp, Toshiba Denzai KK filed Critical Toshiba Electric Equipment Corp
Priority to JP22649583A priority Critical patent/JPS60121961A/en
Publication of JPS60121961A publication Critical patent/JPS60121961A/en
Publication of JPH0350507B2 publication Critical patent/JPH0350507B2/ja
Granted 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To reduce the power loss due to damping resistor of an inductor connected with the base of a switching transistor by connecting the damping resistor of the inductor with a diode. CONSTITUTION:A capacitor C4 is connected between the emitter and the base of a switching transistor Tr1, and a series circuit of a damping resistor R4 and a diode D4 is connected in parallel with an inductor L. The transistor Tr1 forms a blocking oscillator with a time constant circuit of a resistor R1, a drive capacitor C3, and a feedback circuit of the primary winding N1 of an inverter transformer T and a drive winding N2. The transistor Tr1 is quickly turned ON by a resonance circuit of the inductor L and the capacitor C3 at the turning ON time, and the erroneous operation for turning ON at the turning OFF time is prevented by the resistor R4. A reverse current flowed to the resistor R4 is prevented by the diode D.

Description

【発明の詳細な説明】 本発明は、放電灯点灯装置１等に用いられる１石ブロッ
キング発振型インバータのスイッチング回路に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching circuit for a single-block blocking oscillation type inverter used in a discharge lamp lighting device 1 and the like.

（従来技術） １石ブロッキング発振型インバータを用いた放電灯点灯
装置等において、スイッチングトランジスタのベースに
インダクタを接続し１、ベース、エミッタ間ニコンデン
サを接続し、ドライブ用巻線とドライブ用コンデンサに
よりトランジスタをドライブするようにしたスイッチン
グ回路では、トランジスタのクーンオフ時にインダクタ
に蓄えられたエネルギーによりトランジスタがオリして
誤動作するのを防ぐために、インダクタに並列にダンピ
ング抵抗を接続しているが、このダンピング抵抗に逆方
向に電流が流れるときは電力損失となりこの損失は無視
することができないばかりでなく、ダンピング抵抗もこ
れに見合う定格のものを使用しなければならなかった。(Prior art) In a discharge lamp lighting device etc. using a one-stone blocking oscillation type inverter, an inductor is connected to the base of a switching transistor, two capacitors are connected between the base and the emitter, and a drive winding and a drive capacitor are connected. In a switching circuit that drives a transistor, a damping resistor is connected in parallel to the inductor in order to prevent the transistor from malfunctioning due to the energy stored in the inductor when the transistor is turned off. When current flows in the opposite direction, there is a power loss, and not only can this loss not be ignored, but the damping resistor must also have a rating corresponding to this loss.

（本発明） 本発明は、０１ｊ記の電力損失を低減することができる
ようにしプＣスイッチング回路を提供するものであり、
以下、その構成を図示の実施例により説明する。(The present invention) The present invention provides a switching circuit capable of reducing power loss as described in 01j,
The configuration will be explained below with reference to illustrated embodiments.

図において、Ｄｌ、Ｃ１は交流電源の整流平滑用整流器
とコンデンサであり、その出力はスイッチングトランジ
スタＴｒｌによりスイッチングされてインバータトラン
スＴの１次巻線Ｎ１に入カスる０　０２は１次巻線Ｎ１
に並列のコンデンサである。Ｎ２はトランジスタＴｒｙ
のドライブ用巻線であり、ダイオードＤ２を介してトラ
ンジスタＴｒｌノエミンタに接続スる。Ｃ３けドライブ
用コンデンサであり、このドライブ用コンデンサ０３　
ト抵抗Ｒ１の間にトランジスタＴｒ］のベースをインダ
クタＬを介して接続する。In the figure, Dl and C1 are a rectifier and a capacitor for rectifying and smoothing the AC power supply, and the output thereof is switched by a switching transistor Trl and enters the primary winding N1 of the inverter transformer T.002 is the primary winding N1
is a capacitor in parallel with . N2 is a transistor Try
The drive winding is connected to the transistor Trl node via the diode D2. This is a C3 drive capacitor, and this drive capacitor 03
The base of the transistor Tr] is connected between the resistor R1 and the base of the transistor Tr via an inductor L.

Ｔｒ２はドライブ用コンデンサｃ３の放電回路を形成す
る１ランジスタ、Ｒ２はこの放電回路に挿入した抵抗で
あり、このトランジスタＴｒ２のベースは抵抗Ｒ３、グ
イメートＤ３を介して巻線Ｎ３に接続する。Ｎ４は放電
灯Ｌαに出力する２次巻線、Ｎ５、Ｎ６はフィラメント
加熱用巻線である。Tr2 is a transistor forming a discharge circuit for the drive capacitor c3, R2 is a resistor inserted in this discharge circuit, and the base of this transistor Tr2 is connected to the winding N3 via a resistor R3 and a guimate D3. N4 is a secondary winding that outputs to the discharge lamp Lα, and N5 and N6 are filament heating windings.

前記スイッチングトランジスタＴｒｌのエミッタベース
間にはコンデンサｃ４を接続し、インダクタＬには、こ
れに並列に、ダンピング抵抗Ｒ４とダイオ−１゛Ｄ４の
直列回路を接続する。なお、ダイオードＤ４　ｋ′ｉス
イッチングトランジスリスｒｌのベース、エミッタと同
方向にして接続する。A capacitor c4 is connected between the emitter and base of the switching transistor Trl, and a series circuit of a damping resistor R4 and a diode D4 is connected in parallel to the inductor L. Note that the diode D4 k'i is connected in the same direction as the base and emitter of the switching transistor Rl.

前記のように構成したスイッチングトランジスタＴｒｌ
にｔ、抵抗Ｒ１、ドライブ用コンデンサＣ３によル時定
数回路とインバータトランスＴの１次巻線Ｎ〕１、ドラ
イブ用巻線Ｎ２による帰還回路とによりブロッキング発
振回路を形成してパルス発振を行なうものであり、時定
数回路のドライブ用コンデンサＣ３が充電これてトラン
ジスタＴｒｌのベース電圧をベース、エミッタ間の電圧
とダイオードＤ２の電圧の和よりも高くするとターンオ
ンし、つきにドライブ用巻線Ｎ２に誘起される電ＥＥに
よりドライブ用コンデンサＣ３を逆方向に充電してター
ンオフさせる。このとき巻線Ｎ３に誘起される電圧によ
りトランジスタＴｒ２がオンし、コンデンづＣ３に電荷
が残らないよう妬抵抗Ｒ２を介して完全に放電しておく
。放電ｆＪ’Ｌｃは、スイッチングトランジスタＴｒｌ
がオン、Ａフスイッチングすることにより２次巻線Ｎ４
の出力で点灯されることになる。The switching transistor Trl configured as described above
A blocking oscillation circuit is formed by a time constant circuit formed by t, resistor R1, drive capacitor C3, primary winding N]1 of inverter transformer T, and a feedback circuit formed by drive winding N2, and pulse oscillation is performed. When the drive capacitor C3 of the time constant circuit is charged and the base voltage of the transistor Trl becomes higher than the sum of the voltage between the base and the emitter and the voltage of the diode D2, it is turned on and the drive winding N2 is turned on. The induced electric current EE charges the drive capacitor C3 in the opposite direction and turns it off. At this time, the transistor Tr2 is turned on by the voltage induced in the winding N3, and the capacitor C3 is completely discharged through the resistor R2 so that no charge remains in the capacitor C3. The discharge fJ'Lc is caused by the switching transistor Trl.
is on, secondary winding N4 is turned on by switching A
It will be lit with the output of

スイッチングトランジスタＴｒｉは、ターンオン時には
インダクタＬとコンデンサＣ３の共振回路により急速に
ターンオンし、ターンオフ時にはターンオンする誤動作
をダンピング抵抗Ｒ４により防止する。また、コンデン
サｃ４はターンオン時のヒゲ状電流の発生を防止する。The switching transistor Tri is rapidly turned on by the resonant circuit of the inductor L and the capacitor C3 when turned on, and is prevented from malfunctioning by turning on when turned off by the damping resistor R4. Further, the capacitor c4 prevents generation of whisker-like current at turn-on.

ダンピング抵抗Ｒ４にはグイ刈−ドＤ４が接続しである
ので逆方向の電流は流れないからこのときの抵抗Ｒ４に
よる電力損失は生じないことになる。Since the damping resistor R4 is connected to the damping resistor D4, no current flows in the opposite direction, so that no power loss occurs due to the resistor R4 at this time.

（発明の効果） 前述のように、本発明は、スイッチングトランジスタＴ
ｒ１のベースに接続されたインダクタＬのダンピング抵
抗Ｂ４に対しダイオードＤ４を接続したので、この々゛
ンビング抵抗Ｒ４による電力損失を低減することができ
、したがってダンピング抵抗の定格を］ランク下げるこ
とが可能となる。(Effects of the Invention) As described above, the present invention provides a switching transistor T
Since the diode D4 is connected to the damping resistor B4 of the inductor L connected to the base of r1, it is possible to reduce the power loss due to the damping resistor R4, and therefore it is possible to lower the rating of the damping resistor. becomes.

また、スイッチングトランジスタのターンオフ時にイン
ダクタに流れる電流エネルギーが増す□し、ダンピング
抵抗Ｒ４に流れる電流を防ぐので、ターンオフ特性を改
善することができるものである０In addition, the current energy flowing through the inductor increases when the switching transistor is turned off, and the current flowing through the damping resistor R4 is prevented, so the turn-off characteristics can be improved.

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

図面は本発明の１実施例を示す。 Ｔｒｌ　ニスイツチングトランジスタ Ｌ　ニインダクタ　Ｒ４；ダンピング抵抗Ｄ４　：ダイ
オード 特許出願人　東芝電利株式会社 代　理　人　弁理士　岡１）喜久治 ＴＬα 手　続　補　正　書　（方式） ％式％ ２、発明の名称 スイッチング回路 ３、補正をする者 事件との関係　特許出願人 東京都港区三田１丁目４番２８号 （３７５）東芝電材株式会社 代表者　佐原　大穴 ４、代理人 東京都港区新１！４丁目２４番３号 ５、補正命令の日付 昭和５９年２月２８日The drawings depict one embodiment of the invention. Trl Switching transistor L Inductor R4; Damping resistor D4: Diode Patent applicant Toshiba Electric Power Co., Ltd. Agent Patent attorney Oka 1) Kikuji TLα Procedural amendment (method) % formula % 2. Name of invention switching Circuit 3, Relationship with the case of the person making the amendment Patent applicant: 1-4-28 Mita, Minato-ku, Tokyo (375) Toshiba Electric Materials Co., Ltd. Representative: Sahara Oana 4, Agent: Shin 1!4-24, Minato-ku, Tokyo No. 3 No. 5, date of amendment order February 28, 1982

Claims (1)

【特許請求の範囲】[Claims] １石ブロッキング発振型インバータの］−次巻線の入力
をスイッチングするトランジスタと、前記トランジスタ
のベースに接続されたインダクタと、前記インタリタに
並列に接続されたダンピング抵抗と、前記ダンピング抵
抗に対し前記トランジスタのベース、エミッタと同方向
に直列に接続されかつ前記インダクタに並列に接続きれ
たダイオードとを具備することを特徴ｌするスイッチン
グ回？８０1-stone blocking oscillation type inverter] - a transistor for switching the input of the next winding, an inductor connected to the base of the transistor, a damping resistor connected in parallel to the inverter, and a transistor for switching the input of the damping resistor. A switching circuit characterized by comprising a diode connected in series in the same direction as the base and emitter of the inductor and in parallel with the inductor. 80
JP22649583A 1983-11-30 1983-11-30 Switching circuit Granted JPS60121961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22649583A JPS60121961A (en) 1983-11-30 1983-11-30 Switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22649583A JPS60121961A (en) 1983-11-30 1983-11-30 Switching circuit

Publications (2)

Publication Number Publication Date
JPS60121961A true JPS60121961A (en) 1985-06-29
JPH0350507B2 JPH0350507B2 (en) 1991-08-01

Family

ID=16845998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22649583A Granted JPS60121961A (en) 1983-11-30 1983-11-30 Switching circuit

Country Status (1)

Country Link
JP (1) JPS60121961A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6021053A (en) * 1998-07-24 2000-02-01 Ajax Magnethermic Corporation Method and apparatus for switching circuit system including a saturable core device with multiple advantages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6021053A (en) * 1998-07-24 2000-02-01 Ajax Magnethermic Corporation Method and apparatus for switching circuit system including a saturable core device with multiple advantages

Also Published As

Publication number Publication date
JPH0350507B2 (en) 1991-08-01

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