CN2571121Y - Electronic blast - Google Patents
Electronic blast Download PDFInfo
- Publication number
- CN2571121Y CN2571121Y CN 02272946 CN02272946U CN2571121Y CN 2571121 Y CN2571121 Y CN 2571121Y CN 02272946 CN02272946 CN 02272946 CN 02272946 U CN02272946 U CN 02272946U CN 2571121 Y CN2571121 Y CN 2571121Y
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- CN
- China
- Prior art keywords
- circuit
- filter circuit
- rectifier bridge
- link
- fluorescent tube
- Prior art date
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- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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Abstract
The utility model relates to an electronic ballast, which overcomes the defects that the existing ballast can not meet the technical targets that the wave crest coefficient is less than 1.7 and the power factor is larger than 0.95, and can not meet the requirement that current harmonic reaches or approximates to the L grade of the low distortion level in national standards. The utility model comprises a rectification bridge, a power network filter circuit connected to the input end of the rectification bridge, a high frequency switching circuit connected to a DC output end, lamp tube connecting ends AB connected with the output end of the high frequency switching circuit, and an electronic preheating circuit connected with lamp tube connecting ends C, D, wherein, a filter circuit A and a filter circuit B are arranged between the rectification bridge and the high frequency switching circuit; a diode is arranged between the filter circuit A and the filter circuit B; the lamp tube connecting ends are provided with a high frequency feedback circuit back fed to the input end of rectification bridge and the filter circuit A. Only the high frequency feedback circuit, the filter circuit A, the filter circuit B, and a fast diode are added, the utility model can obtain satisfied effects, can reach the high standard prescribed by the nation, and has high performance-price ratio.
Description
Technical field
The utility model belongs to the ballast technical field, particularly the electric ballast that is made of electronic devices and components.
Background technology
Electric ballast is mainly used in the startup of fluorescent lamp, fluorescent lamp light the back with the electric power loop of fluorescent lamp in form an impedance, give electric current of fluorescent lamp on the one hand, the electric current of restricted passage fluorescent lamp plays the current-limiting protection effect to fluorescent lamp on the other hand.Existing electric ballast includes rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, the electronics preheat circuit that links to each other with fluorescent tube link C, D is provided with a filter circuit between rectifier bridge and high-frequency switch circuit.The electric ballast of this circuit structure can be lighted fluorescent tube not difficult, if require its performance can satisfy the regulation of national standard, as crest factor less than 1.7, power factor is greater than 0.95 technical indicator, and current harmonics reaches or near the low distortion level (L level) of national standard, and more intense reliability is arranged, sufficiently long useful life, price is low, and high cost performance is arranged, and also poor is very far away.
Summary of the invention
The purpose of this utility model is to provide a kind of crest factor little, power factor height, low distortion, simple, the reliable electric ballast of circuit structure.
For realizing the purpose of this utility model, described electric ballast comprises rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, with the electronics preheat circuit that fluorescent tube link C, D link to each other, between described rectifier bridge and high-frequency switch circuit, be provided with filter circuit I and filter circuit II, between filter circuit I and filter circuit II, be provided with diode D
01, be provided with the input that feeds back to rectifier bridge and the high-frequency feedback circuit of filter circuit I at the fluorescent tube link.
For realizing the purpose of this utility model, described electric ballast also can be to comprise rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of its dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, with the electronics preheat circuit that fluorescent tube link C, D link to each other, between described rectifier bridge and high-frequency switch circuit, be provided with filter circuit I and filter circuit II, between filter circuit I and filter circuit II, be provided with diode D
01, be provided with the input that feeds back to rectifier bridge and the high-frequency feedback circuit of filter circuit II at the fluorescent tube link.
For realizing the purpose of this utility model, described electric ballast can also be to comprise rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of its dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, with the electronics preheat circuit that fluorescent tube link C, D link to each other, between described rectifier bridge and high-frequency switch circuit, be provided with filter circuit I and filter circuit II, between filter circuit I and filter circuit II, be provided with diode D
01, be provided with the high-frequency feedback circuit of the input that feeds back to rectifier bridge at the fluorescent tube link.
The utility model has adopted some comparatively easy technical measures, just can reduce the amplitude of harmonic wave, is provided with filter circuit I and filter circuit II between rectifier bridge and high-frequency switch circuit, is provided with diode D between filter circuit I and filter circuit II
01Have additional the input that is connected to rectifier bridge at the fluorescent tube link, the high-frequency feedback circuit of filter circuit, the part energy of high frequency output is fed back to relative section successively, to the shaping of input current ripple, to reduce the distortion of waveform, make crest factor reduce, power factor improves, and filter circuit I, filter circuit II, it is simple that the circuit structure of high-frequency feedback circuit can design, electric ballast is reached or near the requirement of national standard distortion level (L level), and lamp current crest coefficient also reaches or near the requirement of national Specification (≤1.7), improved reliability of products greatly, make that cost is low and performance is good, components and parts are not fragile, long service life.
Description of drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 is the circuit block diagram of technical scheme 1.
Fig. 2 is the circuit block diagram of technical scheme 2.
Fig. 3 is the circuit block diagram of technical scheme 3.
Fig. 4 is for realizing the physical circuit schematic diagram of Fig. 1.
Fig. 5 has increased the physical circuit schematic diagram of protective circuit III for the another kind of realizing Fig. 1.
Fig. 6 is for realizing the physical circuit schematic diagram of Fig. 2.
Fig. 7 is for realizing the physical circuit schematic diagram of Fig. 3.
Fig. 8 is the high-frequency feedback circuit figure among Fig. 4,5.
Fig. 9 is the high-frequency feedback circuit figure among Fig. 6.
Figure 10 is the high-frequency feedback circuit figure among Fig. 7.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is described further.
As shown in Fig. 1,2,3, the utility model electric ballast comprises rectifier bridge, electrical network filter circuit, high-frequency switch circuit, electronics preheat circuit, filter circuit I, filter circuit II, diode D
01, high-frequency feedback circuit.Fluorescent tube link A, B link to each other with high-frequency switch circuit, and C, D link to each other with the electronics preheat circuit.
As shown in Fig. 4,5,6,7, protective circuit I is by fuse FU, thermistor NTC, piezo-resistance R
V1Constitute.
The electrical network filter circuit is an electromagnetic interface filter, comprises capacitor C
17, C
18, inductance L
8, L
9, as shown in frame of broken lines among the figure.
High-frequency switch circuit is identical in Fig. 4,5,6, by triode T
1, T
2, resistance R
01, R
02, R
03, R
4, R
5, R
6, R
7, R
8, capacitor C
0(or C '
0), C
3, C
7, C
8, C
9, diode D
8, D
9, D
10, D
12, D
13, diac DB
3, be around in the coil L on the same magnetic core
3, L
4, L
5Constitute.Being hard reboot formula circuit, mainly is to contain diac DB
3Capacitor C
0The harmonic wave situation that can improve electric current is set, also can reduce the crest factor of lamp current.
High-frequency switch circuit among Fig. 7 is to make some adjustment, non-resistance R on the above-mentioned basis
01, R
02, R
03And resistance R is arranged
1, R
2, R
16, R
17, no capacitor C
3Diode D
8, diode-less DB
3, high-frequency switch circuit is a soft start formula circuit, triggerless diode DB
3Triode T
1, T
2At coil L
4, L
5Control lower whorl conductance logical, on fluorescent-lamp tube, produce high-frequency alternating voltage.
The electronics preheat circuit is by capacitor C
5, C
6, diode D
02, D
03, thermistor PTC (or capacitor C '
5, C '
6, diode D '
02, D '
03, thermistor PTC ') constitute, lighting previous crops at fluorescent-lamp tube is conductive path, lights the no effect in back, diode D
02, D
03Cancellation also can operate as normal, and its increase can improve useful life.
Filter circuit I is the inductance L that is serially connected in the DC loop
6, be attempted by the capacitor C of rectification bridge output end
1
As shown in Fig. 4,5,6,7, resistance R among the figure
V2Be piezo-resistance, as protective circuit II, in case rectification bridge output end produces pulse voltage and damages device.
Described filter circuit II is the capacitor C that is attempted by on the DC loop
2, high-frequency feedback circuit is connected on the filter circuit I, as shown in Fig. 4,5.
Described filter circuit II is PPFC (Passive Power Factor Correction) (APFC) circuit, and high-frequency feedback circuit is connected on the filter circuit II, as shown in Fig. 6,7.
Protective circuit III is as shown in Fig. 5,6,7, by resistance R
9, R
10, R
11, R
12, R
13, R
14, R
15, capacitor C
11, C
12Diode D
13, triode T
3, voltage-stabiliser tube CW, controllable silicon SCR, inductance coil L '
7, L
7Constitute, when the electric current that passes through in fluorescent tube is excessive, by inductance coil L '
7, L
7, from inductance coil L '
1, L
1Induced signal of last coupling is added in triode T
3Base stage on, make its conducting, make the high-frequency switch circuit failure of oscillations, the protection fluorescent tube burn, mainly play the protection of abnormality.
Facts have proved, the utility model and common electric ballast relatively, only many simple high-frequency feedback circuits, simple filter circuit I, a filter circuit II and a fast diode D
01, in high-frequency switch circuit, set up a capacitor C
0Compare with simple Active Power Factor Correction (APFC) circuit, really be simple many, but but can obtain very satisfied effect, can reach the high standard of national regulation, and low distortion (L) grade standard, power factor reaches more than 0.95, lamp current crest coefficient drops to about 1.7, the cost performance height.
Claims (9)
1. electric ballast, comprise rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of its dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, with the electronics preheat circuit that fluorescent tube link C, D link to each other, it is characterized in that between described rectifier bridge and high-frequency switch circuit, being provided with filter circuit I and filter circuit II, between filter circuit I and filter circuit II, be provided with diode D
01, be provided with the input that feeds back to rectifier bridge and the high-frequency feedback circuit of filter circuit I at the fluorescent tube link.
2. electric ballast according to claim 1 is characterized in that described filter circuit I is the inductance L that is serially connected in the DC loop
6, be attempted by the capacitor C of rectification bridge output end
1
3. electric ballast according to claim 1 and 2 is characterized in that described filter circuit II is a C type filter circuit, and high-frequency feedback circuit is connected on the filter circuit I.
4. electric ballast, comprise rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of its dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, with the electronics preheat circuit that fluorescent tube link C, D link to each other, it is characterized in that between described rectifier bridge and high-frequency switch circuit, being provided with filter circuit I and filter circuit II, between filter circuit I and filter circuit II, be provided with diode D
01, be provided with the input that feeds back to rectifier bridge and the high-frequency feedback circuit of filter circuit II at the fluorescent tube link.
5. electric ballast according to claim 4 is characterized in that described filter circuit I is the inductance L that is serially connected in the DC loop
6, be attempted by the capacitor C of rectification bridge output end
1
6. according to claim 4 or 5 described electric ballasts, it is characterized in that described filter circuit II is the passive power factor correcting circuit that is attempted by on the DC loop.
7. electric ballast, comprise rectifier bridge, be connected to the electrical network filter circuit of rectifier bridge input, be connected to the high-frequency switch circuit of its dc output end, the fluorescent tube link A, the B that link to each other with the high-frequency switch circuit output, with the electronics preheat circuit that fluorescent tube link C, D link to each other, it is characterized in that between described rectifier bridge and high-frequency switch circuit, being provided with filter circuit I and filter circuit II, between filter circuit I and filter circuit II, be provided with diode D
01, be provided with the high-frequency feedback circuit of the input that feeds back to rectifier bridge at the fluorescent tube link.
8. electric ballast according to claim 7 is characterized in that described filter circuit I is the inductance L that is serially connected in the DC loop
6, be attempted by the capacitor C of rectification bridge output end
1
9. according to claim 4 or 5 described electric ballasts, it is characterized in that described filter circuit II is a passive power factor correcting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272946 CN2571121Y (en) | 2002-09-03 | 2002-09-03 | Electronic blast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02272946 CN2571121Y (en) | 2002-09-03 | 2002-09-03 | Electronic blast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2571121Y true CN2571121Y (en) | 2003-09-03 |
Family
ID=33737544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02272946 Expired - Fee Related CN2571121Y (en) | 2002-09-03 | 2002-09-03 | Electronic blast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2571121Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103582270A (en) * | 2012-08-06 | 2014-02-12 | 广州市索卡科技电子有限公司 | Second arc photoelectric energy conservation electronic ballast |
| CN104981064A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | Simple and practical harmonic wave improved LED drive circuit |
-
2002
- 2002-09-03 CN CN 02272946 patent/CN2571121Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103582270A (en) * | 2012-08-06 | 2014-02-12 | 广州市索卡科技电子有限公司 | Second arc photoelectric energy conservation electronic ballast |
| CN104981064A (en) * | 2015-06-23 | 2015-10-14 | 成都亿信标准认证集团有限公司 | Simple and practical harmonic wave improved LED drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ROOM 802, ), A9, (, NO. 18, JINLIJUJINLI STREET, D Free format text: FORMER NAME OR ADDRESS: 301, NO. 46, XISHENG STREET, TONGXIN ROAD, GUANGZHOU CITY, GUANGDONG PROVINCE, 510091 |
|
| CP03 | Change of name, title or address |
Patentee address after: 510288 Guangdong city of Guangzhou province Haizhuqu District Dongxiao road Jinli in Jinli Street No. 18 Room 802 (A9) Patentee address before: Tongxin Road Xisheng street Guangzhou city Guangdong province 510091 No. 46 301 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030903 Termination date: 20110903 |