JPH01298687A - Ignitor for high-voltage electric-discharge lamp - Google Patents
Ignitor for high-voltage electric-discharge lampInfo
- Publication number
- JPH01298687A JPH01298687A JP13076488A JP13076488A JPH01298687A JP H01298687 A JPH01298687 A JP H01298687A JP 13076488 A JP13076488 A JP 13076488A JP 13076488 A JP13076488 A JP 13076488A JP H01298687 A JPH01298687 A JP H01298687A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- pressure discharge
- voltage
- lamp
- gap
- 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.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000001939 inductive effect Effects 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims 1
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、高圧放電ランプに始動用の高電圧パルスを
与えて高圧放電ランプを点灯させる高圧放電灯用イグナ
イタに関するもので、特に消灯直後に瞬時に高圧放電ラ
ンプを再始動させることが可能な高圧放電灯用イグナイ
タに係る。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an igniter for a high-pressure discharge lamp that applies a high-voltage pulse for starting to a high-pressure discharge lamp to light the high-pressure discharge lamp. The present invention relates to an igniter for a high-pressure discharge lamp that can instantaneously restart a high-pressure discharge lamp.
電源に誘導性安定器を介して接続した高圧放電ランプに
対し始動用の高電圧パルスを加える従来の高圧放電灯用
イグナイタは、高電圧発生回路と、この高電圧発生回路
の出力が供給される充電回路と、この充電回路の出力電
圧が印加される2端子放電ギャップと、充電回路から2
端子放電ギヤ・7プへの通電経路中に一次巻線を直列介
挿するとともに電源から高圧放電ランプへの通電経路中
に二次巻線を直列介挿した昇圧トランスと、昇圧トラン
スの二次巻線の誘起電圧を誘導性安定器をバイパスして
高圧放電ランプの両端間に印加させるバイパスコンデン
サとで構成されている(特願昭62−326328号に
従来例として開示されている)。A conventional high-pressure discharge lamp igniter that applies a high-voltage pulse for starting a high-pressure discharge lamp connected to a power supply via an inductive ballast is supplied with a high-voltage generation circuit and the output of this high-voltage generation circuit. A charging circuit, a two-terminal discharge gap to which the output voltage of this charging circuit is applied, and a two-terminal discharge gap from the charging circuit.
A step-up transformer has a primary winding inserted in series in the current-carrying path to the terminal discharge gear 7 pin, and a secondary winding inserted in series in the current-carrying path from the power supply to the high-pressure discharge lamp, and the secondary winding of the step-up transformer. It consists of a bypass capacitor that applies the induced voltage in the winding across the high-pressure discharge lamp by bypassing the inductive ballast (as disclosed in Japanese Patent Application No. 62-326328 as a conventional example).
この高圧放電灯用イグナイタは、高電圧発生回路の出力
電流でもって充電される充電回路の出力電圧が2端子放
電ギャップの放電開始電圧を超えると、充電回路の充電
電荷が昇圧トランスの一次巻線を通して急速に放電され
、このときに昇圧トランスの二次巻線に高電圧パルスが
誘起することになる。そして、この高電圧パルスがバイ
パスコンデンサを通して高圧放電ランプに印加され、こ
の結果高圧放電ランプが始動して点灯に到る。In this igniter for high-pressure discharge lamps, when the output voltage of the charging circuit, which is charged by the output current of the high-voltage generating circuit, exceeds the discharge starting voltage of the two-terminal discharge gap, the charge of the charging circuit is transferred to the primary winding of the step-up transformer. is rapidly discharged through the transformer, inducing a high voltage pulse in the secondary winding of the step-up transformer. This high-voltage pulse is then applied to the high-pressure discharge lamp through the bypass capacitor, and as a result, the high-pressure discharge lamp starts and lights up.
この場合において、高圧放電ランプを始動させるのに必
要な電圧は、初期始動時には数KVであるが、消灯直後
において瞬時に再始動させたい時には数十KV必要であ
る。In this case, the voltage required to start the high-pressure discharge lamp is several kilovolts at the time of initial starting, but several tens of kilovolts are required when it is desired to restart the lamp instantly immediately after the lamp has been turned off.
このため、消灯直後に瞬時に高圧放電ランプを再始動さ
せることを目的とした上記の高圧放電灯用イグナイタに
おいては、例えば数十KVO高電圧パルスを発生させる
ように回路設計している。Therefore, in the above-mentioned igniter for a high-pressure discharge lamp, which is intended to instantly restart the high-pressure discharge lamp immediately after extinguishing, the circuit is designed to generate, for example, several tens of KVO high-voltage pulses.
上記のように例えば数十KVO高電圧パルスを発生させ
るように回路設計した高圧放電灯用イグナイタを高圧放
電ランプの始動に用いると、初期始動時には高圧放電ラ
ンプに印加される高電圧パルスの波高値が過大になり、
高圧放電ランプに過大なストレスが加えられることにな
り、高圧放電ランプの寿命が極端に短くなるという問題
があった。As mentioned above, when a high-pressure discharge lamp igniter whose circuit is designed to generate, for example, several tens of KVO high-voltage pulses is used to start a high-pressure discharge lamp, the peak value of the high-voltage pulse applied to the high-pressure discharge lamp during initial startup becomes excessive,
There is a problem in that excessive stress is applied to the high-pressure discharge lamp, and the life of the high-pressure discharge lamp is extremely shortened.
この発明の目的は、高圧放電ランプの寿命を短くするこ
となく、消灯直後に瞬時に高圧放電ランプを再始動させ
ることが可能な高圧放電灯用イグナイタを提供すること
である。An object of the present invention is to provide an igniter for a high-pressure discharge lamp that can instantly restart a high-pressure discharge lamp immediately after extinguishing without shortening the life of the high-pressure discharge lamp.
この発明の高圧放電灯用イグナイタは、電源に誘導性安
定器を介して接続した高圧放電ランプに対し始動用の高
電圧パルスを加えるものである。The igniter for a high pressure discharge lamp of the present invention applies a high voltage pulse for starting to a high pressure discharge lamp connected to a power source via an inductive ballast.
そして、この高圧放電灯用イグナイタは、直流高電圧発
生回路と、この直流高電圧発生回路の出力電流で充電さ
れる充電回路と、この充電回路の充電電圧が印加される
2端子放電ギャップと、充電回路から2端子放電ギャッ
プへの通電経路中に一次巻線を直列介挿するとともに電
源から高圧放電ランプへの通電経路中に二次巻線を直列
介挿した昇圧トランスと、昇圧トランスの二次巻線の誘
起電圧を誘導性安定器をバイパスして高圧放電ランプの
両端間に印加させるバイパスコンデンサとを備え、2端
子放電ギャップの少なくとも一方の電極を放電による自
己発熱に伴って他方の電極との間のギャップ長が徐々に
増加する感温変位型導電材で構成している。The igniter for a high-pressure discharge lamp includes a DC high voltage generation circuit, a charging circuit that is charged with the output current of the DC high voltage generation circuit, and a two-terminal discharge gap to which the charging voltage of the charging circuit is applied. A step-up transformer has a primary winding inserted in series in the current-carrying path from the charging circuit to the two-terminal discharge gap, and a secondary winding inserted in series in the current-carrying path from the power supply to the high-pressure discharge lamp; It is equipped with a bypass capacitor that applies the induced voltage of the next winding across the high-pressure discharge lamp by bypassing the inductive ballast, and connects at least one electrode of the two-terminal discharge gap to the other electrode as self-heating occurs due to discharge. It is made of a temperature-sensitive displacement conductive material that gradually increases the gap length between the two.
また、上記の2端子放電ギャップを高圧放電ランプの近
傍に配置して高圧放電ランプの発熱を受けるようにして
もよい。Further, the two-terminal discharge gap described above may be placed near the high-pressure discharge lamp to receive heat from the high-pressure discharge lamp.
この発明の構成においては、直流高電圧発生回路の出力
電流で充電回路が充電され、この充電回路の充電電圧が
2端子放電ギャップの放電開始電圧を超えると充電回路
の充電電荷が昇圧トランスの一次巻線を通して急速に放
電され、以後充電回路の充電・放電の動作が繰り返され
ることになる。In the configuration of the present invention, the charging circuit is charged with the output current of the DC high voltage generation circuit, and when the charging voltage of the charging circuit exceeds the discharge start voltage of the two-terminal discharge gap, the charged charge of the charging circuit is transferred to the primary of the step-up transformer. It is rapidly discharged through the winding, and thereafter the charging and discharging operations of the charging circuit are repeated.
そして、充電回路の充電電荷が放電される毎に昇圧トラ
ンスの二次巻線に高電圧パルスが発生し、この高電圧パ
ルスがバイパスコンデンサを通して高圧放電ランプに印
加され、高圧放電ランプが始動して点灯に到る。Each time the charge in the charging circuit is discharged, a high voltage pulse is generated in the secondary winding of the step-up transformer, and this high voltage pulse is applied to the high-pressure discharge lamp through the bypass capacitor, and the high-pressure discharge lamp is started. The lights come on.
この際、2端子放電ギャップは、少なくとも一方の電極
を放電による自己発熱に伴って他方の電極との間のギャ
ップ長が徐々に増加する感温変位型導電材で構成してい
るので、電源投入されて放電が始まると、放電による自
己発熱で時間の経過とともに少なくとも一方の電極が温
度上昇して他方の電極との間のギャップ長が徐々に増加
することになる。この結果、2端子放電ギャップの放電
開始電圧が電源投入後時間の経過とともに上昇すること
になり、2端子放電ギャップの放電に伴って昇圧トラン
スの二次S線に生しる高電圧パルスの波高値が徐々に増
大することになる。At this time, the two-terminal discharge gap consists of at least one electrode made of a temperature-sensitive displacement conductive material that gradually increases the gap length between it and the other electrode as it generates self-heating due to discharge. When discharge begins, the temperature of at least one of the electrodes increases over time due to self-heating caused by the discharge, and the gap length between the two electrodes and the other electrode gradually increases. As a result, the discharge starting voltage of the two-terminal discharge gap increases as time passes after the power is turned on, and a wave of high voltage pulses is generated in the secondary S line of the step-up transformer as the two-terminal discharge gap discharges. The high value will gradually increase.
したがって、始動しやすい初期始動時は、電源投入直後
の高電圧パルスの波高値が低い時に高圧放電ランプが始
動して点灯に到る。一方、始動しにくい再始動時は、電
源投入後時間が経過して高電圧パルスの波高値が始動可
能なところまで大きくなった時に高圧放電ランプが始動
して点灯に到る。なお、高電圧パルスの波高値の変化す
る期間は、高圧放電ランプが消灯した後高圧放電ランプ
が冷えるまでの期間に比べてきわめて短いものである。Therefore, at the time of initial starting, when the lamp is easy to start, the high-pressure discharge lamp starts and lights up when the peak value of the high-voltage pulse is low immediately after the power is turned on. On the other hand, when restarting the lamp, which is difficult to start, the high-pressure discharge lamp starts and lights up when the peak value of the high voltage pulse increases to a point where starting is possible after a period of time has passed after the power is turned on. Note that the period during which the peak value of the high-voltage pulse changes is extremely short compared to the period from when the high-pressure discharge lamp is turned off until the high-pressure discharge lamp cools down.
この高圧放電灯用イグナイタにおいては、初期始動時に
は、高電圧パルスの波高値が小さい状態で高圧放電ラン
プを始動・点灯させることができ、初期始動時に高圧放
電ランプの電極に与えるストレスを軽減することができ
、高圧放電ランプの寿命を短くすることはない。しかも
、再始動時には、高電圧パルスの波高値を大きくするこ
とができ、消灯直後に高圧放電ランプを瞬時に再始動す
ることができる。また、この再始動時にも、必要以上に
波高値の大きい高電圧パルスが印加されることはなく、
したがってこのときにも高圧放電ランプに過大なストレ
スが加わることはなく、この点でも高圧放電ランプの寿
命を短くすることはない。This igniter for high-pressure discharge lamps can start and light the high-pressure discharge lamp in a state where the peak value of the high-voltage pulse is small at the time of initial start-up, reducing stress on the electrodes of the high-pressure discharge lamp at the time of initial start-up. This will not shorten the life of the high-pressure discharge lamp. Moreover, when restarting, the peak value of the high-voltage pulse can be increased, and the high-pressure discharge lamp can be instantly restarted immediately after extinguishing. Also, during this restart, a high voltage pulse with an unnecessarily large peak value is not applied.
Therefore, no excessive stress is applied to the high-pressure discharge lamp at this time either, and the life of the high-pressure discharge lamp is not shortened in this respect as well.
また、2端子放電ギャップを高圧放電ランプの近傍に配
置して高圧放電ランプの発熱を受けるようにすれば、初
期始動時は、高圧放電ランプが冷えていて2端子放電ギ
ャップのギャップ長が小さく、放電開始電圧が低い、し
たがって、2端子放電ギャップの放電に伴って昇圧トラ
ンスの二次巻線に生じる高電圧パルスの波高値が小さい
。一方、再始動時は、高圧放電ランプが点灯により発熱
していたので、2端子放電ギャップのギャップ長が大き
くなっており、放電開始電圧が高くなっている。したが
って、2端子放電ギャップの放電に伴って昇圧トランス
の二次巻線に生じる高電圧パルスの波高値が大きい。Furthermore, if the two-terminal discharge gap is placed near the high-pressure discharge lamp to receive the heat generated by the high-pressure discharge lamp, at the time of initial startup, the high-pressure discharge lamp is cold and the gap length of the two-terminal discharge gap is small. The discharge starting voltage is low, and therefore the peak value of the high voltage pulse generated in the secondary winding of the step-up transformer due to discharge in the two-terminal discharge gap is small. On the other hand, at the time of restart, the high-pressure discharge lamp was generating heat due to lighting, so the gap length of the two-terminal discharge gap became large, and the discharge starting voltage became high. Therefore, the peak value of the high voltage pulse generated in the secondary winding of the step-up transformer due to discharge in the two-terminal discharge gap is large.
したがって、始動しやすい初期始動時は、高電圧パルス
の波高値が小さい状態で高圧放電ランプが始動して点灯
に到る。一方、始動しにくい再始動時は、高電圧パルス
の波高値が大きい状態で高圧放電ランプが始動して点灯
に到る。Therefore, at the time of initial starting, where starting is easy, the high-pressure discharge lamp starts and lights up in a state where the peak value of the high-voltage pulse is small. On the other hand, when restarting, which is difficult to start, the high-pressure discharge lamp starts and lights up in a state where the peak value of the high-voltage pulse is large.
この高圧放電灯用イグナイタにおいては、高圧放電ラン
プの再始動時には、はじめから高電圧パルスの波高値が
大きく、高電圧パルスの波高値が大きくなるのを待つこ
とな(、消灯直後に高圧放電ランプを瞬時に再始動する
ことができる。In this igniter for high-pressure discharge lamps, when restarting the high-pressure discharge lamp, the peak value of the high-voltage pulse is large from the beginning, and the high-pressure discharge lamp can be restarted instantly.
この発明の第1の実施例を第1図ないし第4図に基づい
て説明する。すなわち、この高圧放電灯用イグナイタは
、第1図に示すように、例えば商用交流電源からなる電
源(直流電源、高周波電源。A first embodiment of the present invention will be described based on FIGS. 1 to 4. That is, as shown in FIG. 1, this igniter for a high-pressure discharge lamp is powered by, for example, a commercial AC power source (DC power source, high frequency power source, etc.).
矩形波電源も可)1に誘導性安定器2を介して接続した
高圧放電ランプ3に対し始動用の高電圧パルスを加える
ものである。A high-voltage pulse for starting is applied to a high-pressure discharge lamp 3 connected to a rectangular wave power source 1 via an inductive ballast 2.
そして、この高圧放電灯用イグナイタは、バイパスコン
デンサ4の両端から端子a、b間に給電される直流高電
圧発生回路5と、この直流高電圧発生回路5の端子c、
d間からの出力電流で充電されるコンデンサ6aお
よび抵抗6bからなる充電回路6と、この充電回路6の
充電電圧が印加される2端子放電ギャップ7と、充電回
路6から2端子放電ギャップ7への通電経路中に一次巻
線n1を直列介挿するとともに電′alから高圧放電ラ
ンプ3への通電経路中に二次巻線n、を直列介挿した昇
圧トランス8と、昇圧トランス8の二次S線n2の誘起
電圧を誘導性安定器2をバイパスして高圧放電ランプ3
の両端間に印加させるバイパスコンデンサ4とを備え、
2端子放電ギャップ7の例えば一方の電極7aを放電に
よる自己発熱に伴って他方の電極7bとの間のギャップ
長が徐々に増加する感温変位型導電材で構成している。This igniter for a high-pressure discharge lamp includes a DC high voltage generation circuit 5 that is supplied with power from both ends of the bypass capacitor 4 between terminals a and b, a terminal c of this DC high voltage generation circuit 5,
A charging circuit 6 consisting of a capacitor 6a and a resistor 6b that are charged with an output current from between d, a two-terminal discharge gap 7 to which the charging voltage of this charging circuit 6 is applied, and a two-terminal discharge gap 7 from the charging circuit 6 to the two-terminal discharge gap 7. A step-up transformer 8 has a primary winding n1 inserted in series in the energization path of Next, the induced voltage of the S line n2 is bypassed by the inductive ballast 2 and the high pressure discharge lamp 3
a bypass capacitor 4 to be applied between both ends of the
For example, one electrode 7a of the two-terminal discharge gap 7 is made of a temperature-sensitive displacement conductive material whose gap length between it and the other electrode 7b gradually increases as self-heating occurs due to discharge.
上記の2端子放電ギャップ7は、具体的には第3図に示
すように、絶縁材からなるベース7cに短冊形の一対の
電極7a、7bを対峙状態に立設した構成であり、電極
7aがバイメタルまたは形状記憶合金等で構成されてい
る。なお、電極7bの方も同様の感温変位型導電材で構
成してもよい。Specifically, as shown in FIG. 3, the two-terminal discharge gap 7 has a structure in which a pair of rectangular electrodes 7a and 7b are erected facing each other on a base 7c made of an insulating material. is made of bimetal or shape memory alloy. Note that the electrode 7b may also be made of a similar temperature-sensitive displacement conductive material.
この高圧放電灯用イグナイタにおいては、高圧放電ラン
プ3の点灯前は、バイパスコンデンサ4の両@電圧がほ
ぼ電源電圧となっており、この電圧が高電圧発生回路5
の端子a、b間に加えられ、端子c、d間に第2図(a
tに示すように直流高電圧VCa+ (>放電開始電
圧VC)が発生する。In this igniter for a high-pressure discharge lamp, before the high-pressure discharge lamp 3 is turned on, both voltages of the bypass capacitor 4 are almost the power supply voltage, and this voltage is the same as that of the high-voltage generating circuit 5.
is applied between terminals a and b, and between terminals c and d in Fig. 2 (a
As shown at t, a DC high voltage VCa+ (>discharge starting voltage VC) is generated.
そして、この直流高電圧発生回路5の出力電流で充電回
路6のコンデンサ6aが抵抗6bを通して充電され、こ
の充電回路6のコンデンサ6aの両端電圧Vcが第2図
(alに示すように徐々に上昇する。上記コンデンサ6
aの両端電圧vcが2端子放電ギャップ7の放電開始電
圧■。を超えると、2端子放電ギャップ7が放電し、コ
ンデンサ6aの充電電荷が昇圧トランス8の一次巻線n
、を通して急速に放電され、昇圧トランス8の二次巻線
n2に第2図tb+に示すような高電圧パルス■、が発
注し、バイパスコンデンサ4を通して高圧放電ランプ3
に印加される。以後、上記の動作が繰り返され、適当な
時点で高圧放電ランプ3が始動して点灯に到る。Then, the capacitor 6a of the charging circuit 6 is charged by the output current of the DC high voltage generating circuit 5 through the resistor 6b, and the voltage Vc across the capacitor 6a of the charging circuit 6 gradually increases as shown in FIG. The above capacitor 6
The voltage VC across a is the discharge starting voltage of the two-terminal discharge gap 7. , the two-terminal discharge gap 7 is discharged, and the charge in the capacitor 6a is transferred to the primary winding n of the step-up transformer 8.
is rapidly discharged through the secondary winding n2 of the step-up transformer 8, and a high voltage pulse (2) as shown in FIG.
is applied to Thereafter, the above operation is repeated, and the high pressure discharge lamp 3 is started and lit at an appropriate time.
高圧放電ランプ3が点灯すると、直流高電圧発生回路5
の端子a、b間に印加される電圧は、高圧放電ランプ3
のランプ電圧とほぼ等しくなり、電源電圧に比べてかな
り低下するため、直流高電圧発生回路5の端子c、d間
に生じる直流高電圧が第2図(a)に示すようにVct
t (<放電開始電圧VC)となり、直流高電圧Vc
4zで充電回路6のコンデンサ6aが充電されても、コ
ンデンサ6aの両端電圧■。が放電開始電圧v6を超え
なくなる。したがって、2端子放電ギャップ7の放電が
停止し、高電圧パルスV、の発生が停止する。When the high pressure discharge lamp 3 lights up, the DC high voltage generation circuit 5
The voltage applied between terminals a and b of the high pressure discharge lamp 3 is
Since the lamp voltage is almost equal to the lamp voltage and is considerably lower than the power supply voltage, the DC high voltage generated between terminals c and d of the DC high voltage generating circuit 5 becomes Vct as shown in FIG. 2(a).
t (<discharge starting voltage VC), and the DC high voltage Vc
Even if the capacitor 6a of the charging circuit 6 is charged by 4z, the voltage across the capacitor 6a is ■. does not exceed the discharge starting voltage v6. Therefore, the discharge in the two-terminal discharge gap 7 is stopped, and the generation of the high voltage pulse V is stopped.
この際、2端子放電ギャップ7は、一方の電極7aを放
電による自己発熱に伴って他方の電極7bとの間のギャ
ップ長が徐々に増加する感温変位型導電材で構成してい
るので、電源投入されて放電が始まると、放電による自
己発熱で時間の経過とともに一方の電極7aが温度上昇
して他方の電1i7bとの間のギャップ長が徐々に増加
することになる。すなわち、電極7aが自己発熱により
わん曲し、第3図において矢印Xで示すように、実線の
状態から破線の状態へ徐々に移行し、ギャップ長しが増
加する。この結果、第4図+a+に示すように、2端子
放電ギャップ7の放電開始電圧V6が電源投入後時間の
経過とともに上昇することになり、したがって充電回路
6のコンデンサ6aの両端電圧■。のピーク値が徐々に
高くなってコンデンサ6aに蓄積されるエネルギが増大
し、2端子放電ギャップ7の放電に伴って昇圧トランス
8の二次巻nntに生じる高電圧パルスV、の波高値が
第4図(blに示すように徐々に増大することになる。At this time, the two-terminal discharge gap 7 is made of a temperature-sensitive displacement conductive material in which the gap length between the one electrode 7a and the other electrode 7b gradually increases as self-heating occurs due to discharge. When the power is turned on and discharge begins, the temperature of one electrode 7a rises over time due to self-heating due to discharge, and the gap length between it and the other electrode 1i7b gradually increases. That is, the electrode 7a is bent due to self-heating, and as shown by the arrow X in FIG. 3, the state gradually changes from the state shown by the solid line to the state shown by the broken line, and the gap length increases. As a result, as shown in +a+ in FIG. 4, the discharge start voltage V6 of the two-terminal discharge gap 7 increases as time passes after the power is turned on, and therefore the voltage across the capacitor 6a of the charging circuit 6 increases. As the peak value of V gradually increases, the energy stored in the capacitor 6a increases, and the peak value of the high voltage pulse V, generated in the secondary winding nnt of the step-up transformer 8 due to the discharge of the two-terminal discharge gap 7 increases. It will gradually increase as shown in Figure 4 (bl).
したがって、始動しやすい初期始動時は、電源投入直後
の高電圧パルスの波高値が低い時に高圧放電ランプ3が
始動して点灯に到る。一方、始動しにくい再始動時は、
電源投入後時間が経過して高電圧パルスの波高値が始動
可能なところまで大きくなった時に高圧放電ランプ3が
始動して点灯に到る。なお、高電圧パルスの波高値の変
化する期間は、高圧放電ランプ3が消灯した後高圧放電
ランプ3が冷えるまでの期間に比べてきわめて短いもの
である。Therefore, at the time of initial starting, which is easy to start, the high-pressure discharge lamp 3 starts and lights up when the peak value of the high voltage pulse is low immediately after the power is turned on. On the other hand, when restarting is difficult,
When time passes after the power is turned on and the peak value of the high voltage pulse becomes large enough to start, the high pressure discharge lamp 3 starts and lights up. Note that the period during which the peak value of the high-voltage pulse changes is extremely short compared to the period from when the high-pressure discharge lamp 3 is turned off until the high-pressure discharge lamp 3 cools down.
この高圧放電灯用イグナイタにおいては、初期始動時に
は、高電圧パルスの波高値が小さい状態で高圧放電ラン
プ3を始動・点灯させることができ、初期始動時に高圧
放電ランプ3の電極に与えるストレスを軽減することが
でき、高圧放電ランプ3の寿命を短くすることはない、
しかも、再始動時には、高電圧パルスの波高値を太き(
することができ、消灯直後に高圧放電ランプ3を瞬時に
再始動することができる。また、この再始動時にも、必
要以上に波高値の大きい高電圧パルスが印加されること
はなく、このときにも高圧放電ランプ3に過大なストレ
スが加わることはなく、したがってこの点でも高圧放電
ランプ3の寿命を短くすることはない。In this igniter for high-pressure discharge lamps, the high-pressure discharge lamp 3 can be started and lit in a state where the peak value of the high-voltage pulse is small at the time of initial start-up, reducing the stress applied to the electrodes of the high-pressure discharge lamp 3 at the time of initial start-up. can be carried out without shortening the life of the high pressure discharge lamp 3.
Moreover, when restarting, the peak value of the high voltage pulse is increased (
Therefore, the high-pressure discharge lamp 3 can be instantly restarted immediately after being turned off. Also, at this time of restarting, a high voltage pulse with an unnecessarily large peak value is not applied, and excessive stress is not applied to the high pressure discharge lamp 3 at this time as well. The life of lamp 3 will not be shortened.
なお、この実施例においては、高電圧パルス■Pの波高
値を太き(すると、高電圧パルスV、の発生間隔が長く
なるが、このときに充電回路6の抵抗6bの抵抗値を時
間の経過とともに小さくしていくことで、高電圧パルス
VPの発生間隔を制御することも可能である。In this embodiment, the peak value of the high voltage pulse P is made thicker (and the interval between occurrences of the high voltage pulse V becomes longer). It is also possible to control the generation interval of the high voltage pulse VP by decreasing it over time.
この発明の第2の実施例を第5図に基づいて説明する。A second embodiment of the invention will be described based on FIG.
この高圧放電灯用イグナイタは、第5図に示すように、
第1図のもめに、充電回路6のコンデンサ6aの両端電
圧Veを分圧する抵抗9゜10を付設するとともに、得
られた分圧電圧が所定値を超えたことを検出する電圧検
出回路11を付設し、電圧検出回路llの出力に応答し
て直流高電圧発生回路5が直流高電圧の発生を停止する
ように構成したものである。This igniter for high-pressure discharge lamp, as shown in Figure 5,
1, a resistor 9.10 is added to divide the voltage Ve across the capacitor 6a of the charging circuit 6, and a voltage detection circuit 11 is added to detect when the obtained divided voltage exceeds a predetermined value. The DC high voltage generating circuit 5 is configured to stop generating the DC high voltage in response to the output of the voltage detection circuit 11.
このように構成すると、高圧放電ランプ3が寿命で点灯
しない場合や無負荷時において、コンデンサ■、の両端
電圧の上昇が制限され、したがって高電圧パルスV、の
波高値の上昇もある値に抑えられることになり、高圧放
電ランプ3の不点灯時や無負荷時の安全性を確保するこ
とができる。With this configuration, when the high-pressure discharge lamp 3 does not light up due to its lifespan or when there is no load, the rise in the voltage across the capacitor (2) is limited, and therefore the rise in the peak value of the high-voltage pulse (V) is also suppressed to a certain value. Therefore, safety can be ensured when the high-pressure discharge lamp 3 is not lit or under no load.
その他は第1の実施例と同様である。The rest is the same as the first embodiment.
なお、第3図に示した2端子放電ギャップ7は、一対の
電極7a、7bの先端ギャップ部分の間隔すなわちギャ
ップ長がある値を超えると、ベース7Cの箇所で一対の
電極7a、7b間に放電が生じて先端ギャップ部分では
放電しなくなるので、ベース7cの箇所での一対の電極
7a、7bの間隔lを適切に設定しておけば、一対のt
掻7a。In addition, in the two-terminal discharge gap 7 shown in FIG. 3, when the distance between the tip gap portions of the pair of electrodes 7a and 7b, that is, the gap length exceeds a certain value, a gap occurs between the pair of electrodes 7a and 7b at the base 7C. Since a discharge occurs and no discharge occurs at the tip gap, if the distance l between the pair of electrodes 7a and 7b at the base 7c is appropriately set, the distance between the pair of electrodes t
Scratch 7a.
7bの先端ギャップ部分の間隔がいくら広がっ°ζも、
放電開始電圧■。が間隔lで決まることになる。したが
って、高圧放電ランプ3の不点灯時や無負荷時において
も、高電圧パルスvPが異常に高くなることはなく、上
記と同様に高圧放電ランプ3の不点灯時や無負荷時の安
全性を確保することができる。No matter how wide the distance between the tip gap parts of 7b becomes,
Discharge starting voltage■. is determined by the interval l. Therefore, even when the high-pressure discharge lamp 3 is not lit or under no load, the high voltage pulse vP does not become abnormally high, and as mentioned above, safety is maintained when the high-pressure discharge lamp 3 is not lit or under no load. can be secured.
この発明の第3の実施例を説明する。この高圧放電灯用
イグナイタは、第1図および第3図に示した2端子放電
ギャップ7を高圧放電ランプ3の近傍に配置して高圧放
電ランプ3の発熱を受けるようにしたもので、その他の
構成は第1図および第3図に示したものと同様である。A third embodiment of this invention will be described. This igniter for a high pressure discharge lamp has the two-terminal discharge gap 7 shown in FIGS. 1 and 3 placed near the high pressure discharge lamp 3 to receive heat from the high pressure discharge lamp 3, and The configuration is similar to that shown in FIGS. 1 and 3.
このように構成すると、放電による自己発熱で2端子放
電ギャップ7の一方の電極7aがわん曲するだけでなく
、高圧放電ランプ30発熱に伴う温度上昇でも2端子放
電ギャップ7の一方の電極7aがわん曲することになる
。With this configuration, not only one electrode 7a of the two-terminal discharge gap 7 is bent due to self-heating due to discharge, but also one electrode 7a of the two-terminal discharge gap 7 is bent due to temperature rise due to heat generation of the high-pressure discharge lamp 30. It will take a turn.
この実施例の場合は、2端子放電ギセツプ7を高圧放電
ランプ3の近傍に配置して高圧放電ランプ3の発熱を受
けるようにしているので、初期始動時は、高圧放電ラン
プ3が冷えていて2端子放電ギャップ7のギャップ長が
小さく、放電開始電圧V6が低い。したがって、2端子
放電ギャップ7の放電に伴って昇圧トランス8の二次巻
線n。In the case of this embodiment, the two-terminal discharge fixture 7 is arranged near the high-pressure discharge lamp 3 to receive the heat generated by the high-pressure discharge lamp 3, so that the high-pressure discharge lamp 3 is cool at the time of initial startup. The gap length of the two-terminal discharge gap 7 is small, and the discharge starting voltage V6 is low. Therefore, as the two-terminal discharge gap 7 discharges, the secondary winding n of the step-up transformer 8.
に生じる高電圧パルスの波高値が小さい。一方、再始動
時は、高圧放電ランプ3が点灯により発熱していたので
、2端子放電ギャップ7のギャップ長が大きくなってお
り、放電開始電圧V6が高くなっている。したがって、
2端子放電ギャップ7の放電に伴って昇圧トランス8の
二次巻線n、に生じる高電圧パルスの波高値が大きくな
る。The peak value of the high voltage pulse generated is small. On the other hand, at the time of restart, the high-pressure discharge lamp 3 was generating heat due to lighting, so the gap length of the two-terminal discharge gap 7 was increased, and the discharge starting voltage V6 was increased. therefore,
As the two-terminal discharge gap 7 discharges, the peak value of the high voltage pulse generated in the secondary winding n of the step-up transformer 8 increases.
したがって、始動しやすい初期始動時は、高電圧パルス
の波高値が小さい状態で高圧放電ランプが始動して点灯
に到る。一方、始動しにくい再始動時は、高電圧パルス
の波高値が大きい状態で高圧放電ランプが始動して点灯
に到る。Therefore, at the time of initial starting, where starting is easy, the high-pressure discharge lamp starts and lights up in a state where the peak value of the high-voltage pulse is small. On the other hand, when restarting, which is difficult to start, the high-pressure discharge lamp starts and lights up in a state where the peak value of the high-voltage pulse is large.
この高圧放電灯用イグナイタにおいては、初期始動時に
は、高電圧パルスの波高値を小さくして高電圧パルスの
発生密度を低くしているので、高圧放電ランプの電極に
与えるストレスを軽減することができ、高圧放電ランプ
の寿命を短くすることはない、しかも、高圧放電ランプ
の再始動時には、はじめから高電圧パルスvPの波高値
が大きく、高電圧パルス■、の波高値が大きくなるのを
待つことなく、消灯直後に高圧放電ランプ3を瞬時に再
始動することができる。This igniter for high-pressure discharge lamps reduces the peak value of high-voltage pulses during initial startup to lower the density of high-voltage pulse generation, reducing stress on the electrodes of the high-pressure discharge lamp. , does not shorten the life of the high-pressure discharge lamp.Moreover, when restarting the high-pressure discharge lamp, the peak value of the high-voltage pulse vP is large from the beginning, and the peak value of the high-voltage pulse ■, should be waited for to become large. Therefore, the high-pressure discharge lamp 3 can be instantly restarted immediately after being turned off.
なお、初期始動時であっても、高圧放電ランプ3が寿命
末期となって始動しにくくなったときは、11a投人後
の放電による自己発熱で第1の実施例と同様にギャップ
長が増大して高電圧パルスの波高値が高くなるので、寿
命末期などにおいても、高圧放電ランプを確実に始動さ
せることができる。Note that even at the initial start-up, when the high-pressure discharge lamp 3 reaches the end of its life and becomes difficult to start, the gap length increases due to self-heating due to the discharge after 11a is turned on, as in the first embodiment. As a result, the peak value of the high-voltage pulse becomes high, so that the high-pressure discharge lamp can be reliably started even at the end of its life.
この発明の高圧放電灯用イグナイタによれば、2@子放
電ギャップの少なくとも一方の電極を放電による自己発
熱に伴って他方の電極との間のギャップ長が徐々に増加
する怒温変位型導電材で構成したので、初期始動時には
、高電圧パルスの波高値が小さい状態で高圧放電ランプ
を始動・点灯させること≠(でき、初期始動時に高圧放
電ランプの電極に与えるストレスを軽減することができ
、高圧放電ランプの寿命を短くすることはない、しかも
、再始動時には、高電圧パルスの波高値を大きくするこ
とができ、消灯直後に高圧放電ランプを瞬時に再始動す
ることができる。また、この再始動時にも、必要以上に
波高値の大きい高電圧パルスが印加されることはなく、
このときにも高圧放電ランプに過大なストレスが加わる
ことはなく、したがってこの点でも高圧放電ランプの寿
命を短くすることはない。According to the igniter for a high-pressure discharge lamp of the present invention, at least one electrode of the two-discharge gap is made of an extreme temperature displacement conductive material that gradually increases the gap length between it and the other electrode as self-heating occurs due to discharge. Because of this structure, at the time of initial startup, it is possible to start and light the high pressure discharge lamp in a state where the peak value of the high voltage pulse is small. It does not shorten the life of the high-pressure discharge lamp, and moreover, when restarting, the peak value of the high-voltage pulse can be increased, and the high-pressure discharge lamp can be instantly restarted immediately after extinguishing. Even when restarting, high voltage pulses with larger peak values than necessary are not applied, and
At this time, too, no excessive stress is applied to the high-pressure discharge lamp, and therefore, the life of the high-pressure discharge lamp is not shortened in this respect as well.
また、2端子放電ギャップを高圧放電ランプの近傍に配
置して高圧放電ランプの発熱を受けるようにすれば、高
圧放電ランプの再始動時には、はじめから高電圧パルス
の波高値が大きく、高電圧パルスの波高値が大きくなる
のを待つことなく、消灯直後に高圧放電ランプを瞬時に
再始動することができる。In addition, if the two-terminal discharge gap is placed near the high-pressure discharge lamp to receive heat from the high-pressure discharge lamp, the peak value of the high-voltage pulse will be large from the beginning when the high-pressure discharge lamp is restarted, and the high-voltage pulse The high-pressure discharge lamp can be instantly restarted immediately after extinguishing without having to wait for the peak value of the lamp to become large.
第1図はこの発明の第1の実施例の構成を示す回路図、
第2図は第1図の回路の基本的動作を示すタイムチャー
ト、第3図は2端子放電ギャップの具体構成を示す正面
図、第4図は実施例の主要動作を示すタイムチャート、
第5図はこの発明の第2の実施例の構成を示す回路図で
ある。
1・・・電源、2・・・誘導性安定器、3・・・高圧放
電ランプ、4・・・バイパスコンデンサ、5・・・直流
高電圧発生回路、6・・・充電回路、7・・・2端子放
電ギャップ、8・・・昇圧トランス−
2−訪導・ヒ官宅器
3− 高圧放電ランプ
4−バイパスコンデンサ
7・−2塙−)放電rヤ・ツブ
8−J圧トランス
第1図
第2図
/C
第3図FIG. 1 is a circuit diagram showing the configuration of a first embodiment of the present invention;
FIG. 2 is a time chart showing the basic operation of the circuit in FIG. 1, FIG. 3 is a front view showing the specific configuration of the two-terminal discharge gap, and FIG. 4 is a time chart showing the main operations of the embodiment.
FIG. 5 is a circuit diagram showing the configuration of a second embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Power source, 2...Inductive ballast, 3...High pressure discharge lamp, 4...Bypass capacitor, 5...DC high voltage generation circuit, 6...Charging circuit, 7...・2-terminal discharge gap, 8...Step-up transformer- 2-Visit/hi government equipment 3-High-pressure discharge lamp 4-Bypass capacitor 7-2-2) Discharger tube 8-J pressure transformer 1st Figure 2/C Figure 3
Claims (2)
ンプに対し始動用の高電圧パルスを加える高圧放電灯用
イグナイタであって、 直流高電圧発生回路と、この直流高電圧発生回路の出力
電流で充電される充電回路と、この充電回路の充電電圧
が印加される2端子放電ギャップと、前記充電回路から
前記2端子放電ギャップへの通電経路中に一次巻線を直
列介挿するとともに前記電源から前記高圧放電ランプへ
の通電経路中に二次巻線を直列介挿した昇圧トランスと
、前記昇圧トランスの二次巻線の誘起電圧を前記誘導性
安定器をバイパスして前記高圧放電ランプの両端間に印
加させるバイパスコンデンサとを備え、前記2端子放電
ギャップの少なくとも一方の電極を放電による自己発熱
に伴って他方の電極との間のギャップ長が徐々に増加す
る感温変位型導電材で構成した高圧放電灯用イグナイタ
。(1) An igniter for a high-pressure discharge lamp that applies a high-voltage pulse for starting a high-pressure discharge lamp connected to a power source via an inductive ballast, which includes a DC high-voltage generation circuit and a DC high-voltage generation circuit. A charging circuit that is charged with an output current, a two-terminal discharge gap to which a charging voltage of the charging circuit is applied, and a primary winding inserted in series in a current-carrying path from the charging circuit to the two-terminal discharge gap. A step-up transformer has a secondary winding interposed in series in the energization path from the power supply to the high-pressure discharge lamp, and the induced voltage in the secondary winding of the step-up transformer bypasses the inductive ballast to discharge the high-pressure discharge. and a bypass capacitor applied between both ends of the lamp, and a temperature-sensitive displacement type conductor in which the gap length between at least one electrode of the two-terminal discharge gap and the other electrode gradually increases as self-heating occurs due to discharge. An igniter for high pressure discharge lamps made of wood.
近傍に配置して前記高圧放電ランプの発熱を受けるよう
にした高圧放電灯用イグナイタ。(2) An igniter for a high-pressure discharge lamp, wherein the two-terminal discharge gap is arranged near the high-pressure discharge lamp to receive heat from the high-pressure discharge lamp.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13076488A JPH01298687A (en) | 1988-05-26 | 1988-05-26 | Ignitor for high-voltage electric-discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13076488A JPH01298687A (en) | 1988-05-26 | 1988-05-26 | Ignitor for high-voltage electric-discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01298687A true JPH01298687A (en) | 1989-12-01 |
Family
ID=15042100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13076488A Pending JPH01298687A (en) | 1988-05-26 | 1988-05-26 | Ignitor for high-voltage electric-discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01298687A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002028150A1 (en) * | 2000-09-26 | 2002-04-04 | Iwasaki Electric Co., Ltd. | Circuit for lighting hid lamp |
US6791286B2 (en) | 2000-09-26 | 2004-09-14 | Iwasaki Electric Co., Ltd. | Hid lamp operating circuit |
-
1988
- 1988-05-26 JP JP13076488A patent/JPH01298687A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002028150A1 (en) * | 2000-09-26 | 2002-04-04 | Iwasaki Electric Co., Ltd. | Circuit for lighting hid lamp |
US6791286B2 (en) | 2000-09-26 | 2004-09-14 | Iwasaki Electric Co., Ltd. | Hid lamp operating circuit |
US6836078B2 (en) | 2000-09-26 | 2004-12-28 | Iwasaki Electric Co., Ltd. | Circuit for lighting HID lamp |
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