JPH03760B2 - - Google Patents
Info
- Publication number
- JPH03760B2 JPH03760B2 JP57073716A JP7371682A JPH03760B2 JP H03760 B2 JPH03760 B2 JP H03760B2 JP 57073716 A JP57073716 A JP 57073716A JP 7371682 A JP7371682 A JP 7371682A JP H03760 B2 JPH03760 B2 JP H03760B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- preheating
- transformer
- discharge lamp
- magnetic amplifier
- 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
Links
- 238000004804 winding Methods 0.000 claims description 53
- 230000010355 oscillation Effects 0.000 claims description 16
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
この発明は放電灯点灯装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp lighting device.
従来例を第４図および第５図に示している。こ
れらの図において、Ｅは電源、MSはメインスイ
ツチ、Ｉはインバータ、OTは発振トランス、
KTは可飽和リアクトル、Ｌは放電灯、RTは予
熱トランス、RSは予熱スイツチであり、第４図
のものは、メインスイツチMSによる電源投入と
同時に、発振トランスOTにより予熱電圧とラン
プ電圧を放電灯Ｌに印加し、フイラメント温度が
しだいに上昇して始動に至る。また第５図のもの
は電源投入と同時に予熱スイツチRSをオンにす
ると予熱トランスRTに電流が流れ放電灯Ｌのフ
イラメントが予熱される。そしてフイラメントが
十分予熱された後、予熱スイツチRSをオフにす
ると同時にランプに電圧を印加し始動させる。ま
たこれらにおいて、ランプフイラメントのエミツ
タ脱落のために生ずる片側放電（エミツタレス）
に対する対策として、放電灯Ｌと並列に可飽和リ
アクトルKTを接続してあり、エミツタレス側に
流れ込むはずの半波電流をこのリアクトルKTを
通して流す。このため放電灯Ｌに供給される交流
電源はエミツタレス時も障害なく流れることがで
き、片側放電による高電圧発生のために生じる発
振トランスOTの発熱やその１次巻線への影響等
を防いでいる。 Conventional examples are shown in FIGS. 4 and 5. In these figures, E is the power supply, MS is the main switch, I is the inverter, OT is the oscillation transformer,
KT is a saturable reactor, L is a discharge lamp, RT is a preheating transformer, and RS is a preheating switch.The one in Figure 4 releases the preheating voltage and lamp voltage by the oscillation transformer OT at the same time as the power is turned on by the main switch MS. The electric current is applied to the electric lamp L, and the filament temperature gradually rises, leading to starting. In the case of the one shown in FIG. 5, when the preheating switch RS is turned on at the same time as the power is turned on, a current flows through the preheating transformer RT and the filament of the discharge lamp L is preheated. After the filament is sufficiently preheated, the preheating switch RS is turned off and at the same time voltage is applied to the lamp to start it. Also, in these, one-sided discharge (emitter-less) occurs due to the emitter of the lamp filament falling off.
As a countermeasure against this, a saturable reactor KT is connected in parallel with the discharge lamp L, and the half-wave current that should flow into the emitterless side is made to flow through this reactor KT. For this reason, the AC power supplied to the discharge lamp L can flow without any interference even when the emitter is absent, preventing heat generation in the oscillation transformer OT caused by high voltage generation due to one-sided discharge and its influence on the primary winding. There is.
しかしながら、第４図の点灯装置は、フイラメ
ント温度が比較的低い予熱状態で高いランプ電圧
が印加されているため、始動時のフイラメント損
耗が大きく、また点灯中も予熱電流が継続し損失
となるという欠点があつた。また第５図の点灯装
置は、予熱トランスRTに流れる電流を制御する
ための予熱スイツチRSに高電圧が印加されるた
め信頼性に欠けるという欠点があつた。 However, in the lighting device shown in Figure 4, a high lamp voltage is applied in a preheated state where the filament temperature is relatively low, so the filament is subject to significant wear and tear during startup, and the preheating current continues even during lighting, resulting in loss. There were flaws. Furthermore, the lighting device shown in FIG. 5 has a drawback in that it lacks reliability because a high voltage is applied to the preheating switch RS for controlling the current flowing through the preheating transformer RT.
したがつて、この発明の目的は、予熱スイツチ
の信頼性を向上し、始動時のフイラメント損耗を
低減し、点灯中の予熱電流を不要とすることがで
きる放電灯点灯装置を提供することである。 Therefore, an object of the present invention is to provide a discharge lamp lighting device that can improve the reliability of a preheating switch, reduce filament wear during starting, and eliminate the need for preheating current during lighting. .
この発明の一実施例を第１図ないし第３図に示
す。すなわち、この放電灯装置いおいて、電源
Ｅ、メインスイツチMS、インバータＩおよび発
振トランスOTは第４図および第５図のものと同
様である。この発振トランスOTの２次巻線に放
電灯Ｌを接続するとともに、可飽和予熱トランス
RT′の１次巻線１ａおよび磁気増幅器MTの主巻
線２ａの直列回路を発振トランスOTの２次巻線
に接続し、予熱トランスRT′の２次巻線１ｂに放
電灯Ｌのフイラメントを接続し、また磁気増幅器
MTの制御巻線２ｂを予熱スイツチであるタイマ
Ｔを介して電源すなわち直流電源Eaに接続して
いる。磁気増幅器MTの詳細は第２図に示してい
る。すなわち、この磁気増幅器MTは、三脚鉄心
（急峻な飽和特性をもつ）３の外側の２つの脚３
ａ，３ｂに２つの制御巻線（巻数は同じ）２ｂを
巻きこれらをタイマＴのタイマ接点T′を介して
直流電源Eaと接続する。真中の脚３ｃに主巻線
２ａを巻き、これを制御しようとする交流電源す
なわち予熱トランスRT′および発振トランスOT
に接続する。まず制御巻線２ｂに制御電流Ｉを流
すと、それによつて生じた磁束φは鉄心の外側を
巡環し飽和に達する。このとき主巻線２ａは磁束
を発生することができず、リアクトルとしての機
能を停止して交流電流が主巻線２ａを流れる。つ
ぎに、制御巻線２ｂに直流電流が流れないとき、
主巻線２ａは磁束を発生することができてリアク
トルとして作用し、高インピーダンスをもつ。よ
つて主巻線２ａには交流電流はほとんど流れな
い。これがオフ状態である。第３図はこの磁気増
幅器MTの制御電流Ｉの変化による主巻線２ａの
リアクタンスXLを示したものである。 An embodiment of the invention is shown in FIGS. 1 to 3. That is, in this discharge lamp device, the power source E, main switch MS, inverter I, and oscillation transformer OT are the same as those in FIGS. 4 and 5. A discharge lamp L is connected to the secondary winding of this oscillation transformer OT, and a saturable preheating transformer is
A series circuit of the primary winding 1a of RT' and the main winding 2a of the magnetic amplifier MT is connected to the secondary winding of the oscillation transformer OT, and the filament of the discharge lamp L is connected to the secondary winding 1b of the preheating transformer RT'. Connect and also magnetic amplifier
The control winding 2b of the MT is connected to a power source, that is, a DC power source Ea , via a timer T, which is a preheating switch. Details of the magnetic amplifier MT are shown in FIG. That is, this magnetic amplifier MT consists of two outer legs 3 of a tripod core 3 (having steep saturation characteristics).
Two control windings 2b (with the same number of turns) are wound around a and 3b, and these are connected to a DC power source Ea via a timer contact T' of a timer T. The main winding 2a is wound around the middle leg 3c, and the alternating current power supply, that is, the preheating transformer RT' and the oscillation transformer OT, are used to control the main winding 2a.
Connect to. First, when a control current I is applied to the control winding 2b, the magnetic flux φ generated thereby circulates around the outside of the iron core and reaches saturation. At this time, the main winding 2a cannot generate magnetic flux, stops functioning as a reactor, and alternating current flows through the main winding 2a. Next, when no DC current flows through the control winding 2b,
The main winding 2a can generate magnetic flux, acts as a reactor, and has high impedance. Therefore, almost no alternating current flows through the main winding 2a. This is the off state. FIG. 3 shows the reactance X L of the main winding 2a due to changes in the control current I of the magnetic amplifier MT.
この放電灯点灯装置は、メインスイツチMSに
よる電源投入と同時にタイマＴがオンとなり、磁
気増幅器MTの制御巻線２ｂに直流電流が流れ、
磁気増幅器MTがオン状態になる。このため発振
トランスOTの２次巻線より予熱トランスRT′に
電流が流れ、放電灯Ｌのフイラメントが予熱され
る。フイラメントが十分予熱される所定時間が経
過後、タイマＴがオフとなり、磁気増幅器MTが
オフ状態となつて電流が遮断されると、同時に放
電灯Ｌに電圧が印加され放電灯Ｌは始動する。ま
た放電灯Ｌがエミツタレスになつたとき、予熱ト
ランスRT′・磁気増幅器MTを可飽和設計してい
るため、エミツタレス時の半波電流がこれらの１
次巻線１ａおよび主巻線２ａの直列回路を流れ
る。 In this discharge lamp lighting device, the timer T is turned on at the same time as the power is turned on by the main switch MS, and a DC current flows through the control winding 2b of the magnetic amplifier MT.
Magnetic amplifier MT is turned on. Therefore, current flows from the secondary winding of the oscillation transformer OT to the preheating transformer RT', and the filament of the discharge lamp L is preheated. After a predetermined time has elapsed to sufficiently preheat the filament, the timer T is turned off, the magnetic amplifier MT is turned off, and the current is cut off. At the same time, a voltage is applied to the discharge lamp L and the discharge lamp L is started. Also, when the discharge lamp L becomes emitter-less, the preheating transformer RT' and magnetic amplifier MT are designed to be saturable, so the half-wave current when the emitter-less state is
It flows through the series circuit of the secondary winding 1a and the main winding 2a.
このように構成したため、始動時のランプへの
印加電圧が第４図のものと比べて下がるので、フ
イラメント損耗が小さく、スムーズに始動する。
また点灯中は予熱トランスRT′が働かないので、
予熱による点灯中の損失がない。また第５図の場
合、予熱スイツチには高耐圧のスイツチが必要で
あるが磁気増幅器を用いると、かなりの高電圧ま
で小電流で制御できる。さらに可飽和特性を用い
た予熱トランスRT′・磁気増幅器MTがエミツタ
レス対策を兼ねているのでコストが安くなる。 With this configuration, the voltage applied to the lamp at the time of starting is lower than that of the lamp shown in FIG. 4, so that filament wear is small and the lamp starts smoothly.
Also, since the preheating transformer RT' does not work while the light is on,
There is no loss during lighting due to preheating. In the case of FIG. 5, the preheating switch requires a switch with high withstand voltage, but if a magnetic amplifier is used, it is possible to control a considerably high voltage with a small current. Furthermore, since the preheating transformer RT' and magnetic amplifier MT, which use saturable characteristics, also serve as a countermeasure against emitters, the cost is reduced.
以上のように、この発明の放電灯点灯装置は、
発振トランスと、この発振トランスの１次巻線に
接続されたインバータと、前記発振トランスの２
次巻線に接続された放電灯と、前記２次巻線に並
列的に接続される１次巻線を有しこの１次巻線に
結合される２次巻線が前記放電灯のフイラメント
に接続された予熱トランスと、この予熱トランス
の前記１次巻線に主巻線が挿入された磁気増幅器
と、この磁気増幅器の制御巻線に通電して前記主
巻線のリアクタンスを低下させる電源と、この電
源から前記制御巻線への通電を制御する予熱スイ
ツチとを備え、前記予熱トランスおよび前記磁気
増幅器を可飽和特性を有するように構成したこと
を特徴とするため、つぎの作用効果がある。すな
わち始動時には予熱スイツチをオンにして磁気増
幅器の主巻線のリアクタンスを低下させることに
より予熱トランスの１次巻線に通電するため、始
動時の放電灯のフイラメントへの印加電圧が低下
するので、始動時のフイラメントの損耗を低減で
きる。また点灯時には予熱スイツチをオフにして
磁気増幅器の主巻線のリアクタンスにより予熱ト
ランスの１次巻線への電流を押さえるため、点灯
中の予熱電流を停止でき、そのため予熱いよる点
灯中の損失を防止できる。さらに予熱スイツチは
磁気増幅器の制御巻線を制御するものであり、高
圧が加わらないので予熱スイツチの信頼性を確保
できる。また予熱トランスおよび磁気増幅器は可
飽和特性を有するため、いわゆるエミツタレス時
の半波電流が予熱トランスの１次巻線および磁気
増幅器の主巻線を流れるので、発振トランスの発
熱やその１次巻線への影響等を防止することがで
きるとともに、小型かつコストダウンを図ること
ができるという効果がある。 As described above, the discharge lamp lighting device of the present invention has the following features:
an oscillation transformer, an inverter connected to the primary winding of the oscillation transformer, and a secondary winding of the oscillation transformer;
A discharge lamp is connected to a secondary winding, and a primary winding is connected in parallel to the secondary winding, and a secondary winding coupled to the primary winding is connected to the filament of the discharge lamp. a preheating transformer connected to the preheating transformer, a magnetic amplifier having a main winding inserted in the primary winding of the preheating transformer, and a power source that energizes a control winding of the magnetic amplifier to reduce the reactance of the main winding. , and a preheating switch that controls energization from the power supply to the control winding, and the preheating transformer and the magnetic amplifier are configured to have saturable characteristics, so that the following effects are obtained. . In other words, at the time of starting, the preheating switch is turned on and the reactance of the main winding of the magnetic amplifier is reduced, thereby energizing the primary winding of the preheating transformer, which reduces the voltage applied to the filament of the discharge lamp at the time of starting. Wear and tear on the filament during startup can be reduced. In addition, when lighting, the preheating switch is turned off and the reactance of the main winding of the magnetic amplifier suppresses the current flowing to the primary winding of the preheating transformer, making it possible to stop the preheating current during lighting, thereby reducing losses during lighting due to preheating. It can be prevented. Furthermore, the preheating switch controls the control winding of the magnetic amplifier, and since no high voltage is applied, the reliability of the preheating switch can be ensured. Furthermore, since the preheating transformer and magnetic amplifier have saturable characteristics, a so-called emitterless half-wave current flows through the primary winding of the preheating transformer and the main winding of the magnetic amplifier, causing heat generation in the oscillation transformer and its primary winding. This has the effect of being able to prevent the effects on the device, etc., as well as making it possible to reduce the size and cost.
第１図はこの発明の一実施例の回路図、第２図
は磁気増幅器の概略図、第３図は磁気増幅器の特
性図、第４図および第５図は従来例の回路図であ
る。
Ｉ……インバータ、OT……発振トランス、
RT′……予熱トランス、MT……磁気増幅器、Ｌ
……放電灯、Ea……電源となる直流電源、Ｔ…
…予熱スイツチであるタイマ。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a schematic diagram of a magnetic amplifier, FIG. 3 is a characteristic diagram of the magnetic amplifier, and FIGS. 4 and 5 are circuit diagrams of a conventional example. I...Inverter, OT...Oscillation transformer,
RT′...Preheating transformer, MT...Magnetic amplifier, L
...discharge lamp, E a ...DC power supply, T...
...A timer that is a preheating switch.
Claims (1)
線に接続されたインバータと、前記発振トランス
の２次巻線に接続された放電灯と、前記２次巻線
に並列的に接続される１次巻線を有しこの１次巻
線に結合される２次巻線が前記放電灯のフイラメ
ントに接続された予熱トランスと、この予熱トラ
ンスの前記１次巻線に主巻線が挿入された磁気増
幅器と、この磁気増幅器の制御巻線に通電して前
記主巻線のリアクタンスを低下させる電源と、こ
の電源から前記制御巻線への通電を制御する予熱
スイツチとを備え、前記予熱トランスおよび前記
磁気増幅器を可飽和特性を有するように構成した
ことを特徴とする放電灯点灯装置。1. an oscillation transformer, an inverter connected to the primary winding of the oscillation transformer, a discharge lamp connected to the secondary winding of the oscillation transformer, and a primary winding connected in parallel to the secondary winding. a preheating transformer having a winding and a secondary winding coupled to the primary winding connected to the filament of the discharge lamp; and a magnetic preheating transformer having a main winding inserted into the primary winding of the preheating transformer. an amplifier, a power source that energizes a control winding of the magnetic amplifier to reduce the reactance of the main winding, and a preheating switch that controls energization from the power source to the control winding, the preheating transformer and the A discharge lamp lighting device characterized in that a magnetic amplifier is configured to have saturable characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7371682A JPS58189995A (en) | 1982-04-30 | 1982-04-30 | Device for firing discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7371682A JPS58189995A (en) | 1982-04-30 | 1982-04-30 | Device for firing discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58189995A JPS58189995A (en) | 1983-11-05 |
| JPH03760B2 true JPH03760B2 (en) | 1991-01-08 |
Family
ID=13526218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7371682A Granted JPS58189995A (en) | 1982-04-30 | 1982-04-30 | Device for firing discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58189995A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59117093A (en) * | 1982-12-22 | 1984-07-06 | 東芝テック株式会社 | Device for firing discharge lamp |
| JPS60207289A (en) * | 1984-03-30 | 1985-10-18 | 東芝ライテック株式会社 | Device for firing discharge lamp |
| JPS63252395A (en) * | 1986-09-01 | 1988-10-19 | 大和電子工業株式会社 | Hot cathode type discharge lamp lighter |
| JP4725139B2 (en) * | 2005-03-11 | 2011-07-13 | 東レ株式会社 | Oscillator, power supply using the same, and lamp lighting device using the same |
| FR2961624B1 (en) | 2010-06-16 | 2014-11-28 | Commissariat Energie Atomique | OPEN POROSITY SOLID INTERFACE SEAL FOR NUCLEAR FUEL PEN AND NUCLEAR CONTROL BAR |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5048762A (en) * | 1973-08-31 | 1975-05-01 | ||
| JPS5533752A (en) * | 1978-08-30 | 1980-03-10 | Ikeda Denki Kk | Device for lighting discharge lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034263U (en) * | 1973-07-23 | 1975-04-12 |
-
1982
- 1982-04-30 JP JP7371682A patent/JPS58189995A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5048762A (en) * | 1973-08-31 | 1975-05-01 | ||
| JPS5533752A (en) * | 1978-08-30 | 1980-03-10 | Ikeda Denki Kk | Device for lighting discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58189995A (en) | 1983-11-05 |
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