JPS634319B2 - - Google Patents
Info
- Publication number
- JPS634319B2 JPS634319B2 JP13892780A JP13892780A JPS634319B2 JP S634319 B2 JPS634319 B2 JP S634319B2 JP 13892780 A JP13892780 A JP 13892780A JP 13892780 A JP13892780 A JP 13892780A JP S634319 B2 JPS634319 B2 JP S634319B2
- Authority
- JP
- Japan
- Prior art keywords
- inductance
- discharge lamp
- dimming
- power factor
- circuit
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 25
- 238000010586 diagram Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Description
【発明の詳細な説明】
この発明は放電灯点灯回路に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp lighting circuit.
従来の放電灯点灯回路は、第１図に示すよう
に、交流電源Ｅの一端にインダクタンスL1およ
び調光用リレー接点Ｓの一端をそれぞれ接続し、
調光用リレー接点Ｓの他端とインダクタンスL1
の他端との間にインダクタンスL2を接続すると
ともに、調光用リレー接点Ｓの他端と交流電源Ｅ
の他端との間に力率改善兼共振用コンデンサＣを
接続し、インダクタンスL1の他端と交流電源Ｅ
の他端との間にパルス発生部Ｐを接続し、このパ
ルス発生部Ｐに放電ランプLPを並列接続してい
る。 As shown in FIG. 1, a conventional discharge lamp lighting circuit connects an inductance L1 and one end of a dimming relay contact S to one end of an AC power source E, respectively.
The other end of the dimming relay contact S and the inductance L 1
Connect the inductance L 2 between the other end and the other end of the dimming relay contact S and the AC power supply E.
A power factor improvement/resonance capacitor C is connected between the other end of the inductance L1 and the AC power supply E.
A pulse generating section P is connected between the other end, and a discharge lamp LP is connected in parallel to this pulse generating section P.
この放電灯点灯回路は、リレー電源（図示せ
ず）のオンオフ操作で調光用リレー接点Ｓを閉開
して放電ランプLPの全光・調光の切換操作を行
うことができる。すなわち、調光用リレー接点Ｓ
を閉成することにより、インダクタンスL1，L2
の並列回路体が放電ランプLPに直列接続されて
主点灯回路のインピーダンスが減少するととも
に、力率改善兼共振用コンデンサＣが交流電源Ｅ
の両端間に接続されることになつて放電ランプ
LPが全光（始動・点灯）状態となり、力率改善
兼共振用コンデンサＣが力率改善の機能を果た
す。 This discharge lamp lighting circuit can switch the discharge lamp LP between full light and dimming by closing and opening the dimming relay contact S by turning on and off a relay power source (not shown). In other words, the dimming relay contact S
By closing the inductances L 1 , L 2
A parallel circuit body is connected in series to the discharge lamp LP to reduce the impedance of the main lighting circuit, and a power factor improvement/resonance capacitor C is connected to the AC power source E.
A discharge lamp which is supposed to be connected between the ends of
The LP enters the full-light (starting/lighting) state, and the power factor improvement/resonance capacitor C performs the power factor improvement function.
一方、調光用リレー接点Ｓを開成することによ
り、インダクタンスL1のみが放電ランプLPに直
列接続されて主点灯回路のインピーダンスが増加
するとともに、インダクタンスL2および力率改
善兼共振用コンデンサＣの直列回路体が放電ラン
プLPに並列接続されることになつてこの直列回
路体L2，Ｃが放電ランプLPとで共振回路をなし、
放電ランプLPが調光状態となる。この場合、直
列回路体L2，Ｃは、全光点灯状態から調光点灯
状態へ切換えたときの放電ランプLPの立消えを
防止する。 On the other hand, by opening the dimming relay contact S, only the inductance L 1 is connected in series with the discharge lamp LP, increasing the impedance of the main lighting circuit, and the inductance L 2 and the power factor correction/resonance capacitor C are connected in series. The series circuit body is connected in parallel to the discharge lamp LP, and this series circuit body L 2 , C forms a resonant circuit with the discharge lamp LP,
The discharge lamp LP enters the dimming state. In this case, the series circuits L 2 and C prevent the discharge lamp LP from going out when switching from the full-light lighting state to the dimming lighting state.
しかし、このような従来の放電灯点灯回路は、
調光用リレー接点Ｓを開成して調光始動を行つた
場合に放電ランプLPと並列に構成されるインダ
クタンスL2が小さいために、放電ランプLPに印
加されたパルスがコンデンサＣで吸収されてしま
い、調光始動が困難であつた。一方、調光始動を
容易に行おうとすれば、インダクタンスL2の値
が大きくなり、目的の調光比を得ることができな
かつた。さらに、全光時において、コンデンサＣ
が短絡した場合、交流電源Ｅからの電流を制限す
る素子が何もないために、コンデンサ電流が無限
に増え、コンデンサＣとして乾式のプラスチツク
コンデンサを用いた場合に発火する危険性があつ
た。 However, such conventional discharge lamp lighting circuits are
When the dimming relay contact S is opened to start the dimming, the pulse applied to the discharge lamp LP is absorbed by the capacitor C because the inductance L2 configured in parallel with the discharge lamp LP is small. It was difficult to start the dimming. On the other hand, if an attempt was made to start dimming easily, the value of inductance L2 would increase, making it impossible to obtain the desired dimming ratio. Furthermore, at full light, the capacitor C
If there is a short circuit, there is no element to limit the current from the AC power supply E, so the capacitor current increases indefinitely, and if a dry plastic capacitor is used as the capacitor C, there is a risk of fire.
したがつて、この発明の目的は、調光始動を確
実に行えかつ大きい調光比を得ることができ、し
かも力率改善兼共振用コンデンサの短絡による発
火を防止できる放電灯点灯回路を提供することで
ある。 Therefore, an object of the present invention is to provide a discharge lamp lighting circuit that can perform dimming start reliably, obtain a large dimming ratio, and prevent ignition due to short circuit of a power factor correction/resonance capacitor. That's true.
この発明の一実施例を第２図に示す。すなわ
ち、この放電灯点灯回路は、調光用リレー接点Ｓ
の他端と交流電源Ｅの他端との間に、力率改善兼
共振用コンデンサＣに代えて力率改善兼共振用コ
ンデンサＣと十分大きい（500ｍＨ以上）インダ
クタンスL3との直列回路体を接続したもので、
その他の構成は第１図と同様である。 An embodiment of this invention is shown in FIG. That is, this discharge lamp lighting circuit has a dimming relay contact S.
Between the other end of the AC power source E and the other end of the AC power source E, instead of the power factor improvement/resonance capacitor C, connect a series circuit consisting of the power factor improvement/resonance capacitor C and a sufficiently large (500mH or more) inductance L3 . With the connected
The other configurations are the same as in FIG. 1.
この実施例の放電灯点灯回路は、リレー電源
（図示せず）のオンオフ操作で調光用リレー接点
Ｓを閉開して放電ランプLPの全光・調光の切換
操作を行うことができる。すなわち、調光用リレ
ー接点Ｓを閉成することにより、インダクタンス
L1，L2の並列回路体が放電ランプLPに直列接続
されて主点灯回路のインピーダンスが減少すると
ともに、力率改善兼共振用コンデンサＣおよびイ
ンダクタンスL3の直列回路体が交流電源Ｅの両
端間に接続されることになつて放電ランプLPが
全光（始動・点灯）状態となり、力率改善兼共振
用コンデンサＣが力率改善の機能を果し、インダ
クタンスL3が力率改善兼共振用コンデンサＣの
電圧を昇圧するとともに力率改善兼共振用コンデ
ンサＣが短絡した場合の限流要素して作用し、力
率改善兼共振用コンデンサＣの短絡による発火を
防止する。 The discharge lamp lighting circuit of this embodiment can switch the discharge lamp LP between full light and dimming by closing and opening the dimming relay contact S by turning on and off a relay power source (not shown). That is, by closing the dimming relay contact S, the inductance
A parallel circuit body of L 1 and L 2 is connected in series to the discharge lamp LP to reduce the impedance of the main lighting circuit, and a series circuit body of a power factor correction/resonance capacitor C and an inductance L 3 is connected to both ends of the AC power source E. As a result, the discharge lamp LP becomes full-light (starting/lighting) state, the power factor improvement/resonance capacitor C performs the power factor improvement function, and the inductance L 3 performs the power factor improvement/resonance function. In addition to boosting the voltage of the power factor improvement/resonance capacitor C, it acts as a current limiting element in the event that the power factor improvement/resonance capacitor C is short-circuited, thereby preventing ignition due to a short circuit of the power factor improvement/resonance capacitor C.
一方、調光用リレー接点Ｓを開成することによ
り、インダクタンスL1のみが放電ランプLPに直
列接続されて主点灯回路のインピーダンスが増加
するとともに、インダクタンスL2，L3および力
率改善兼共振用コンデンサＣの直列回路体が放電
ランプLPに並列接続されることになつてこの直
列回路体L2，L3，Ｃが放電ランプLPとで共振回
路をなし、放電ランプLPが調光状態となる。こ
の場合、直列回路体L2，L3，Ｃは、全光点灯状
態から調光点灯状態へ切換えたときの放電ランプ
LPの立消えを防止する。また、調光始動時には、
パルス発生部Ｐが発生するパルスが直列回路体
L2，L3，Ｃおよび放電ランプLPに印加されるが、
直列回路体L2，L3，Ｃを構成するインダクタン
スL2を大きくすることなくインダクタンスL3を
十分大きく（500ｍＨ以上）することにより前記
パルスを力率改善兼共振用コンデンサＣで吸収さ
せずに放電ランプLPに印加することができ、し
たがつて調光始動が容易になり、かつ十分大きい
調光比を得ることができる。 On the other hand, by opening the dimming relay contact S, only the inductance L 1 is connected in series with the discharge lamp LP, increasing the impedance of the main lighting circuit, and the inductance L 2 , L 3 and the power factor correction/resonance The series circuit of the capacitor C is connected in parallel to the discharge lamp LP, and the series circuit L 2 , L 3 , and C form a resonant circuit with the discharge lamp LP, and the discharge lamp LP enters a dimming state. . In this case, the series circuit bodies L 2 , L 3 , and C are the discharge lamps when switching from the full-light lighting state to the dimming lighting state.
Prevents LP from disappearing. Also, when starting dimming,
The pulses generated by the pulse generator P are connected to a series circuit.
applied to L 2 , L 3 , C and the discharge lamp LP,
By making the inductance L 3 sufficiently large (500 mH or more) without increasing the inductance L 2 that constitutes the series circuit L 2 , L 3 , C, the pulse can be prevented from being absorbed by the power factor correction/resonance capacitor C. The voltage can be applied to the discharge lamp LP, making it easy to start dimming and obtaining a sufficiently large dimming ratio.
以上のように、この発明の放電灯点灯回路は、
交流電源と、この交流電源の一端に一端を接続し
た第１のインダクタンスと、この第１のインダク
タンスの一端に一端を接続した調光用スイツチ
と、この調光用スイツチの他端と前記第１のイン
ダクタンスの他端との間に接続した第２のインダ
クタンスと、前記調光用スイツチの他端と前記交
流電源の他端との間に接続した力率改善兼共振用
コンデンサおよび第３のインダクタンスの直列回
路体と、前記第１のインダクタンスの他端と前記
交流電源の他端との間に接続したパルス始動型の
放電ランプと、この放電ランプに始動用のパルス
を印加するパルス発生部とを備えているので、第
２のインダクタンスを大きくすることなく第３の
インダクタンスを大きくすることにより調光時に
おける力率改善兼共振用コンデンサによるパルス
発生部のパルスの吸収を少くして放電ランプに十
分な高いパルスを加えることができ、したがつ
て、調光始動を確実に行えかつ大きい調光比を得
ることができ、しかも全光時において第３のイン
ダクタンスが力率改善兼共振用コンデンサの限流
要素となつて力率改善兼共振用コンデンサの短絡
による発火を防止できるという効果がある。 As described above, the discharge lamp lighting circuit of the present invention is
an AC power supply, a first inductance having one end connected to one end of the AC power supply, a dimmer switch having one end connected to one end of the first inductance, the other end of the dimmer switch and the first inductance; a second inductance connected between the other end of the inductance, a power factor correction/resonance capacitor and a third inductance connected between the other end of the dimmer switch and the other end of the AC power supply. a series circuit body, a pulse-start discharge lamp connected between the other end of the first inductance and the other end of the AC power source, and a pulse generator that applies a starting pulse to the discharge lamp. By increasing the third inductance without increasing the second inductance, the absorption of pulses in the pulse generation section by the power factor improvement and resonance capacitor during dimming can be reduced, making it possible to use a discharge lamp. It is possible to apply a sufficiently high pulse, therefore, it is possible to perform dimming start reliably and obtain a large dimming ratio.Moreover, at full light, the third inductance is connected to the power factor correction and resonance capacitor. It has the effect of acting as a current limiting element and preventing fires caused by short circuits in the power factor improvement/resonance capacitor.
第１図は従来の放電灯電灯回路の回路図、第２
図はこの発明の一実施例の放電灯点灯回路の回路
図である。
Ｅ……交流電源、L1，L2，L3……インダクタ
ンス、Ｃ……力率改善兼共振用コンデンサ、Ｓ…
…調光用リレー接点、Ｐ……パルス発生部、LP
……放電ランプ。
Figure 1 is a circuit diagram of a conventional discharge lamp lamp circuit, Figure 2
The figure is a circuit diagram of a discharge lamp lighting circuit according to an embodiment of the present invention. E...AC power supply, L1 , L2 , L3 ...Inductance, C...Power factor improvement and resonance capacitor, S...
...Relay contact for dimming, P...Pulse generator, LP
...discharge lamp.
Claims (1)
続した第１のインダクタンスと、この第１のイン
ダクタンスの一端に一端を接続した調光用スイツ
チと、この調光用スイツチの他端と前記第１のイ
ンダクタンスの他端との間に接続した第２のイン
ダクタンスと、前記調光用スイツチの他端と前記
交流電源の他端との間に接続した力率改善兼共振
用コンデンサおよび第３のインダクタンスの直列
回路体と、前記第１のインダクタンスの他端と前
記交流電源の他端との間に接続したパルス始動型
の放電ランプと、この放電ランプに始動用のパル
スを印加するパルス発生部とを備えた放電灯点灯
回路。1 an AC power source, a first inductance having one end connected to one end of the AC power source, a dimmer switch having one end connected to one end of the first inductance, and a dimmer switch having one end connected to one end of the dimmer switch; a second inductance connected between the other end of the first inductance; a power factor correction and resonance capacitor connected between the other end of the dimmer switch and the other end of the AC power supply; A series circuit of inductances, a pulse-start discharge lamp connected between the other end of the first inductance and the other end of the AC power source, and a pulse generator that applies a starting pulse to the discharge lamp. A discharge lamp lighting circuit equipped with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13892780A JPS5761299A (en) | 1980-09-30 | 1980-09-30 | Circuit for firing discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13892780A JPS5761299A (en) | 1980-09-30 | 1980-09-30 | Circuit for firing discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5761299A JPS5761299A (en) | 1982-04-13 |
| JPS634319B2 true JPS634319B2 (en) | 1988-01-28 |
Family
ID=15233383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13892780A Granted JPS5761299A (en) | 1980-09-30 | 1980-09-30 | Circuit for firing discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5761299A (en) |
-
1980
- 1980-09-30 JP JP13892780A patent/JPS5761299A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5761299A (en) | 1982-04-13 |
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