JPH03124592U - - Google Patents
Info
- Publication number
- JPH03124592U JPH03124592U JP3283090U JP3283090U JPH03124592U JP H03124592 U JPH03124592 U JP H03124592U JP 3283090 U JP3283090 U JP 3283090U JP 3283090 U JP3283090 U JP 3283090U JP H03124592 U JPH03124592 U JP H03124592U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- discharge lamp
- switching element
- chopper
- lighting
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Description
第１図は本考案の交流放電ランプ点灯装置の概
略回路図であり、第２図はチヨツパー制御駆動回
路および電圧検出回路を詳細に示した図である。
第３図はリツプル含有率を説明するための図であ
り、第４図は第１のスイツチング素子であるＭＯ
ＳＦＥＴのオン−オフの状態を示す図である。
図中、１……放電ランプ、２……極性切替回路
、３……チヨツパー回路、４……チヨツパー制御
駆動回路、５……電流検出器、３１……第１のス
イツチング素子、３２……転流ダイオード、１３
……インダクタンス要素、１５……コンデンサ、
２１，２２，２３，２４……第２のスイツチング
素子、８……電圧検出器。
FIG. 1 is a schematic circuit diagram of the AC discharge lamp lighting device of the present invention, and FIG. 2 is a diagram showing details of a chopper control drive circuit and a voltage detection circuit.
FIG. 3 is a diagram for explaining the ripple content rate, and FIG. 4 is a diagram for explaining the ripple content rate, and FIG.
It is a figure which shows the on-off state of SFET. In the figure, 1... Discharge lamp, 2... Polarity switching circuit, 3... Chopper circuit, 4... Chopper control drive circuit, 5... Current detector, 31... First switching element, 32... Switching circuit. current diode, 13
...Inductance element, 15...Capacitor,
21, 22, 23, 24... second switching element, 8... voltage detector.
Claims (1)
を有するチヨツパー回路と、このチヨツパー回路
の出力側に接続され直流を出力する平滑回路と、
この平滑回路の出力に接続され第２のスイツチン
グ素子がフルブリツジ型に構成され低周波を出力
する極性切替回路と、この極性切替回路の出力に
接続された放電ランプと、該第１のスイツチング
素子に流れる電流を検出する電流検出器と、この
電流検出器の信号に基づき該第１のスイツチング
素子を高周波でオン−オン制御するチヨツパー駆
動制御回路と、該放電ランプの点灯電圧を検出す
る電圧検出回路を有する交流放電ランプ点灯装置
において、 前記電圧検出回路は、点灯初期時における前記
放電ランプの過小電圧状態を検出するとともに、
前記チヨツパー駆動制御回路によつて第１のスイ
ツチング素子をオフし、点灯初期におけるランプ
電流を制限する手段を具備したことを特徴とする
交流放電ランプ点灯装置。[Claims for Utility Model Registration] A chopper circuit having a first switching element connected to a DC power source; a smoothing circuit connected to the output side of the chopper circuit and outputting DC;
A polarity switching circuit that is connected to the output of this smoothing circuit and has a second switching element configured as a full bridge type and outputs a low frequency; a discharge lamp that is connected to the output of this polarity switching circuit; A current detector that detects the flowing current, a chopper drive control circuit that controls the first switching element on-on at high frequency based on the signal of the current detector, and a voltage detection circuit that detects the lighting voltage of the discharge lamp. In the AC discharge lamp lighting device, the voltage detection circuit detects an undervoltage state of the discharge lamp at the initial stage of lighting, and
An AC discharge lamp lighting device comprising means for turning off the first switching element by the chopper drive control circuit to limit lamp current at an initial stage of lighting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3283090U JPH03124592U (en) | 1990-03-30 | 1990-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3283090U JPH03124592U (en) | 1990-03-30 | 1990-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03124592U true JPH03124592U (en) | 1991-12-17 |
Family
ID=31536034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3283090U Pending JPH03124592U (en) | 1990-03-30 | 1990-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03124592U (en) |
-
1990
- 1990-03-30 JP JP3283090U patent/JPH03124592U/ja active Pending
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