JPH0214699U - - Google Patents
Info
- Publication number
- JPH0214699U JPH0214699U JP8997688U JP8997688U JPH0214699U JP H0214699 U JPH0214699 U JP H0214699U JP 8997688 U JP8997688 U JP 8997688U JP 8997688 U JP8997688 U JP 8997688U JP H0214699 U JPH0214699 U JP H0214699U
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- circuit
- transformer
- smoothing circuit
- output side
- 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
- 238000009499 grossing Methods 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000004804 winding Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の半導体スイツチング方式を採用した放
電灯点灯装置の回路図、第３図ａは第２図の回路
の各素子の電圧、電流のタイムチヤート、同図ｂ
は安定点灯中に突然放電灯電圧が上昇した状態を
説明する波形図である。
図中、４：平滑回路、５：起動器、６：放電灯
、７：立消え防止用定電流回路、８：電流制御回
路、９：ドライブ回路、１０：インバータ、１１
：高電圧重畳回路、１２：整流平滑回路、Ｄ１：
整流器、Ｄ３：ダイオード、Ｃ１，Ｃ２，Ｃ３：
コンデンサ、Ｔ１：トランス、ＴＲ１，ＴＲ２：
半導体スイツチング素子、ＴＲ３，ＴＲ４：トラ
ンジスタ、ｏｐ：オペアンプ、Ｒ１，Ｒ２，Ｒ３
，Ｒ４，Ｒ５，Ｒ６，Ｒ７：抵抗。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram of a discharge lamp lighting device that uses a conventional semiconductor switching method. Figure 3a is a time chart of the voltage and current of each element of the circuit in Figure 2, and figure b
is a waveform diagram illustrating a state in which the discharge lamp voltage suddenly increases during stable lighting. In the figure, 4: smoothing circuit, 5: starter, 6: discharge lamp, 7: constant current circuit for preventing extinguishing, 8: current control circuit, 9: drive circuit, 10: inverter, 11
: High voltage superimposition circuit, 12: Rectification and smoothing circuit, D 1 :
Rectifier, D 3 : Diode, C 1 , C 2 , C 3 :
Capacitor, T 1 : Transformer, TR 1 , TR 2 :
Semiconductor switching element, TR 3 , TR 4 : transistor, op: operational amplifier, R 1 , R 2 , R 3
, R 4 , R 5 , R 6 , R 7 : resistance.
Claims (1)
インバータ回路と、トランスの２次側の一方の巻
線に順次接続された整流回路と、平滑回路と、前
記トランスの２次側の別巻線に一方が接続され、
他方が平滑回路の出力側に接続された高電圧重畳
回路とからなる放電灯点灯装置において、前記平
滑回路の出力側と、放電灯との間に放電灯電圧検
出部と、この検出部の結果に基づいて放電灯に電
流を供給する手段とを備えた立消え防止用電流供
給回路を具備したことを特徴とする放電灯点灯装
置。 an inverter circuit having a semiconductor switching element and a transformer, a rectifier circuit connected in sequence to one winding on the secondary side of the transformer, a smoothing circuit, one of which is connected to another winding on the secondary side of the transformer,
In a discharge lamp lighting device comprising a high voltage superimposing circuit, the other of which is connected to the output side of a smoothing circuit, a discharge lamp voltage detection section is provided between the output side of the smoothing circuit and the discharge lamp, and a voltage detection section is provided between the output side of the smoothing circuit and the discharge lamp; What is claimed is: 1. A discharge lamp lighting device comprising: a current supply circuit for preventing extinguishment, comprising means for supplying current to a discharge lamp based on the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8997688U JPH0214699U (en) | 1988-07-08 | 1988-07-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8997688U JPH0214699U (en) | 1988-07-08 | 1988-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0214699U true JPH0214699U (en) | 1990-01-30 |
Family
ID=31314513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8997688U Pending JPH0214699U (en) | 1988-07-08 | 1988-07-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214699U (en) |
-
1988
- 1988-07-08 JP JP8997688U patent/JPH0214699U/ja active Pending
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