CN2268354Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
- Publication number
- CN2268354Y CN2268354Y CN 96232456 CN96232456U CN2268354Y CN 2268354 Y CN2268354 Y CN 2268354Y CN 96232456 CN96232456 CN 96232456 CN 96232456 U CN96232456 U CN 96232456U CN 2268354 Y CN2268354 Y CN 2268354Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- push
- resistance
- electronic ballast
- diode
- 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 - Fee Related
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides an electronic ballast with an abnormal state protection circuit. The electronic ballast mainly comprises a bridge rectifier circuit, a filter circuit and a push-pull oscillating circuit. A secondary winding L3 is additionally arranged on a choke coil L2 at the output end of the push-pull oscillating circuit to couple and sample, and reaches the trigger electrode of silicon controlled rectifier SCR through an integrating circuit composed of R7, R8 and a capacitor C6 after the current limitation of a resistor R9 and the rectification of by a diode D9 to control a switch of the oscillating circuit and realize self-protection under abnormal states.
Description
The utility model relates to a kind of electric ballast, particularly a kind of electric ballast that has abnormal state protection circuit.Belong to the improvement of electric ballast.
It is wide that electric ballast has operating voltage range, lights fluorescent tube speed advantage such as determine.But when fluorescent tube breaks down or during wiring error, electric ballast can be subjected to the impact of big electric current and damage.
The purpose of this utility model provides a kind of electric ballast that has abnormal state protection circuit.
Below in conjunction with accompanying drawing technical solution of the present utility model is described.
Fig. 1 is an electrical schematic diagram of the present utility model.
The utility model mainly comprises D as seen from Figure 11-D
4The bridge rectifier that forms, BG1、BG
2And C4、R
5、B
1、C
5、R
6、B
3The push-pull oscillator electricity that forms Road, and filter circuit. Output choke coil L at push-pull oscillator circuit2On add one pair of winding L3The coupling sampling, L3Serial connection current-limiting resistance R9With commutation diode D9Connect by resistance R again7、R
8And capacitor C6The input of the integrating circuit that forms, the trigger electrode of the output termination controllable silicon SCR of integrating circuit, the anode series resistance R of SCR10After, lead up to diode D6Opposite direction connection transistor BG1Base stage, resistance R is passed through on another road2Connect transistor BG1Colelctor electrode, thereby consist of the abnormal state protection circuit of electric ballast.
Operation principle of the present utility model and the course of work are: under normal circumstances pass through R9Electric current very little, integral voltage is less than controllable silicon threshold values 0.7V, not conducting of controllable silicon. When circuit was in abnormality, output current increased, C6When upper charging voltage rose rapidly greater than controllable silicon threshold values 0.7V, the controllable silicon SCR conducting made transistor BG1Base stage is in reverse bias and ends, the oscillating circuit failure of oscillation, and by R2Provide and keep electric current, make The conducting of controllable silicon SCR long term maintenance, ballast is in the failure of oscillation state, no current output, Ballast is in all the time keeps guard mode, thereby circuit is protected; When cutting off electricity The source or fix a breakdown after, C6On voltage by R7、R
8Discharge is turn-offed controllable silicon, Withdraw from guard mode, namely circuit enters again normal condition automatically.
Claims (1)
1, a kind of electric ballast mainly comprises bridge rectifier, filter circuit and push-pull oscillator circuit, it is characterized in that: at the output choke coil L of push-pull oscillator circuit
2On add one pair of winding L
3The coupling sampling, L
3Serial connection current-limiting resistance R
9With rectifier diode D
9, connect by resistance R again
7, R
8And capacitor C
6The input of the integrating circuit of forming, the trigger electrode of the output termination controllable silicon SCR of integrating circuit, the anode series resistance R of SCR
10After, lead up to diode D
6Oppositely connect transistor BG
1Base stage, resistance R is passed through on another road
2Connect transistor BG
1Collector electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96232456 CN2268354Y (en) | 1996-08-02 | 1996-08-02 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96232456 CN2268354Y (en) | 1996-08-02 | 1996-08-02 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2268354Y true CN2268354Y (en) | 1997-11-19 |
Family
ID=33909411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96232456 Expired - Fee Related CN2268354Y (en) | 1996-08-02 | 1996-08-02 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2268354Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838852B (en) * | 2005-03-24 | 2010-09-08 | 厦门通士达照明有限公司 | Protection method and circuit of electronic amperite |
-
1996
- 1996-08-02 CN CN 96232456 patent/CN2268354Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838852B (en) * | 2005-03-24 | 2010-09-08 | 厦门通士达照明有限公司 | Protection method and circuit of electronic amperite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201369674Y (en) | Switch power supply circuit with short-circuit protection | |
| CN105680418B (en) | A kind of load motor protection circuit, fan and air-conditioning | |
| CN2268354Y (en) | Electronic ballast | |
| CN101394135B (en) | Control system and controller power source for electric appliance | |
| CN110148925A (en) | For the guard method of motor ground fault and frequency converter in frequency converter | |
| CN108923388A (en) | A kind of fault detection circuit powering on buffer cell and method | |
| CN106026624A (en) | Stabilized switching power supply circuit system | |
| CN2148456Y (en) | Lamp failure protector for electronic ballast of single or multiple lamps | |
| CN2138381Y (en) | Start failure protector of electronic ballast lamp | |
| CN2891430Y (en) | Full-automatic power mains over-voltage protector | |
| CN203660889U (en) | LED driving power source circuit | |
| CN2206023Y (en) | Neon lamp transformer with full-automatic electronic protector | |
| CN2490756Y (en) | Crystal break pipe AC high-voltage switch | |
| CN2266255Y (en) | Electronic transformer for high-reliable energy-saving neon lamp | |
| CN211785948U (en) | Relay output control detection circuit | |
| CN2235185Y (en) | Electronic ballast with protector at abnormal state | |
| CN2234679Y (en) | Electronic transformer for cold cathode fluorescent lamp for staircase lighting | |
| CN2157616Y (en) | Demagnetisation protection arrangement for electronic ballast | |
| CN2305804Y (en) | Electronic voltage reduction startor | |
| CN2737114Y (en) | Electronic ballast | |
| CN2346140Y (en) | High-efficient energy-saving electronic ballast | |
| CN2181793Y (en) | Multifunctional inverter power supply for neon lamp | |
| CN2231471Y (en) | Over voltage protective electronic ballast | |
| CN2131270Y (en) | Electronic ballast with lamp non-starting protector | |
| CN2314551Y (en) | Electronic transformer for protecting neon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |