JPS61184299U - - Google Patents
Info
- Publication number
- JPS61184299U JPS61184299U JP6870785U JP6870785U JPS61184299U JP S61184299 U JPS61184299 U JP S61184299U JP 6870785 U JP6870785 U JP 6870785U JP 6870785 U JP6870785 U JP 6870785U JP S61184299 U JPS61184299 U JP S61184299U
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- voltage
- lighting device
- switching element
- control 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims description 5
- 238000009499 grossing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
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
図は動作説明用の波形図、第３図は従来例を示す
回路図、第４図及び第５図は動作説明用の波形図
である。
Ｌ……放電灯、ＣＨ１……チヨークコイル、ａ
１……一次巻線、ａ２……二次巻線、ＣＨ２……
補助チヨークコイル、ＴＲＩ……トライアツク（
スイツチング素子）、Ｑ１……トリガ回路、Ｑ２
……第一制御回路、Ｑ３……第二制御回路、ＺＤ
……ツエナダイオード（定電圧素子）。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a waveform diagram for explaining the operation, FIG. 3 is a circuit diagram showing a conventional example, and FIGS. 4 and 5 are waveform diagrams for explaining the operation. L...discharge lamp, CH 1 ...chiyoke coil, a
1 ...Primary winding, a2 ...Secondary winding, CH2 ...
Auxiliary choke coil, TRI...Triack (
switching element), Q 1 ... trigger circuit, Q 2
...First control circuit, Q3 ...Second control circuit, ZD
...Zena diode (constant voltage element).
Claims (1)
１の一次巻線ａ１と補助チヨークコイルＣＨ２を
介装すると共に、補助チヨークコイルＣＨ２にス
イツチング素子ＴＲＩを並列接続し、電源電圧に
より設定した基準電圧と放電灯電圧により設定し
た直流レベルとの比較により放電灯電圧が一定に
なるように前記スイツチング素子ＴＲＩのトリガ
回路Ｑ１のパルス発生時期を制御する第一制御回
路Ｑ２を設け、前記チヨークコイルＣＨ１の二次
巻線ａ２により放電灯電流の変化を検出して放電
灯電流が一定になるように前記スイツチング素子
ＴＲＩのトリガ回路Ｑ１のパルス発生時期を制御
する第二制御回路Ｑ３を設けた放電灯点灯装置に
おいて、前記チヨークコイルＣＨ１の二次巻線電
圧が一定電圧以上になつたとき前記放電灯電圧に
より設定した直流レベルを抑制するように、チヨ
ークコイルＣＨ１の二次巻線電圧を整流平滑した
信号を、定電圧素子ＺＤを介して第一制御回路Ｑ
２に印加するようにしたことを特徴とする放電灯
点灯装置。 Between the power supply and the discharge lamp L, there is a chiyoke coil CH.
The primary winding A1 of 1 and the auxiliary choke coil CH2 are interposed, and the switching element TRI is connected in parallel to the auxiliary choke coil CH2 , and the reference voltage set by the power supply voltage is compared with the DC level set by the discharge lamp voltage. A first control circuit Q2 is provided to control the pulse generation timing of the trigger circuit Q1 of the switching element TRI so that the discharge lamp voltage is constant. In the discharge lamp lighting device, the discharge lamp lighting device is provided with a second control circuit Q3 that controls the pulse generation timing of the trigger circuit Q1 of the switching element TRI so that the discharge lamp current becomes constant by detecting a change in the discharge lamp current. When the secondary winding voltage of CH1 exceeds a certain voltage, a signal obtained by rectifying and smoothing the secondary winding voltage of CH1 is sent to the constant voltage element ZD so as to suppress the DC level set by the discharge lamp voltage. Through the first control circuit Q
2. A discharge lamp lighting device characterized in that a voltage is applied to the discharge lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6870785U JPH049758Y2 (en) | 1985-05-08 | 1985-05-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6870785U JPH049758Y2 (en) | 1985-05-08 | 1985-05-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61184299U true JPS61184299U (en) | 1986-11-17 |
| JPH049758Y2 JPH049758Y2 (en) | 1992-03-11 |
Family
ID=30603700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6870785U Expired JPH049758Y2 (en) | 1985-05-08 | 1985-05-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH049758Y2 (en) |
-
1985
- 1985-05-08 JP JP6870785U patent/JPH049758Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH049758Y2 (en) | 1992-03-11 |