CN101111115B - Filament control device for hot-cathode electric ballast - Google Patents
Filament control device for hot-cathode electric ballast Download PDFInfo
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- CN101111115B CN101111115B CN2006100860130A CN200610086013A CN101111115B CN 101111115 B CN101111115 B CN 101111115B CN 2006100860130 A CN2006100860130 A CN 2006100860130A CN 200610086013 A CN200610086013 A CN 200610086013A CN 101111115 B CN101111115 B CN 101111115B
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- filament
- preheating
- switch
- resonant
- control
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The present invention relates to a hot cathode electronic ballast filament control device, which comprises a lamp tube, a half-bridge drive circuit and an electronic ballast control integrated circuit, wherein an inductor L and a resonant capacitor C2 are connected in series between the half-bridge drive circuit and the lamp tube, and both ends of the resonant capacitor C2 are connected at one end of the filament of both ends of the lamp tube in parallel; the other end of the filament of both ends of the lamp tube is connected with a preheating capacitor C1 in parallel; a resonant switch for controlling the resonant capacitor C2 is connected between the resonant capacitor C2 and the filament of the lamp tube in series, a preheating switch for controlling the preheating capacitor C1 is connected between the preheating capacitor C1 and the filament of the lamp tube in series, a switching control circuit is arranged among the electronic ballast control integrated circuit, the resonant switch and the preheating switch, the electronic ballast control integrated circuit controls the lamp tube to be accessed to the preheating capacitor in the preheating process of the filament through the switching control circuit and simultaneously the resonant capacitor is turned off, during the operating process of the filament, the preheating capacitor is turned off and the resonant capacitor is accessed simultaneously, the switching and access of the preheating switch and the resonant switch is controlled according to the preheating time set, the lamp tube can work normally, and the filament is opened at the same time.
Description
Technical field
The invention belongs to a kind of circuit of electronic ballast, belong to a kind of fluorescent lamp hot-cathode electric ballast filament control circuit and method for designing thereof especially.
Background technology
It is luminous that fluorescent lamp triggering startup needs preheating to start then, but in the prior art, after fluorescent lamp triggered, filament still was in conducting state, when having powered with common electric ballast since the T5 fluorescent lamp emerges especially at present, find the defective of its heater current greater than lamp current.Though taked many improvement, also can only accomplish little electric current, owing to determine, bring into play its high light efficiency, feature of long life as the physical dimension and the physical characteristic of T5 fluorescent lamp, must do new improvement at the power pack of electric ballast.
Summary of the invention
In order to remedy above deficiency, the invention provides a kind of filament control device for hot-cathode electric ballast and method for designing thereof of filament zero current can realize the luminous work of fluorescent lamp the time.
Technical scheme of the present invention is achieved in that a kind of filament control device for hot-cathode electric ballast, comprises fluorescent tube, starts the half-bridge drive circuit of this fluorescent tube, also comprises:
1) controls the electronic ballast control integrated circuit that this half-bridge drive circuit starts;
2) be composed in series the inductance L and the resonance capacitor C 2 of resonant tank between this half-bridge drive circuit and the fluorescent tube successively, the two ends of this resonant capacitance C2 are parallel to a utmost point of this lamp tube ends filament simultaneously;
3) another of this lamp tube ends filament preheating capacitor C 1 extremely in parallel;
4) preheating switch that this preheating capacitor C 1 of a may command of also connecting between the resonant switch that this resonant capacitance of may command C2 inserts or disconnect of connecting between this resonant capacitance C2 and the tube filament, this preheating capacitor C 1 and tube filament inserts or disconnects.
5) be provided with a control switching circuit (9) between this electronic ballast control integrated circuit and this resonant switch and the preheating switch, this control switching circuit has the signal controlling input of this electronic ballast control integrated circuit, and the resonance output with this resonant switch access of control or disconnection inserts with this preheating switch of control or the pre-hot output terminal of disconnection, being convenient to control this fluorescent tube inserts this pre-thermal capacitance and disconnects this resonant capacitance simultaneously at this filament pre-heating during the stage, and when the filament working stage, disconnect this pre-thermal capacitance and insert this resonant capacitance simultaneously, filament is opened a way when realizing this fluorescent tube by pre-thermal conversion operate as normal.
As a further improvement on the present invention, the partiting dc capacitor C3 that connects between this half-bridge drive circuit and this inductance L.
As a further improvement on the present invention, this electronic ballast control integrated circuit is according to the filament preheating time of setting, and the conversion of controlling this preheating switch and resonance switch room by this control switching circuit inserts.
As a further improvement on the present invention, this control switching circuit have control this filament pre-heating setting-up time be 0.4s to 1s scope.
As a further improvement on the present invention, this resonant switch and this preheating switch are the gate circuit switch, and this control switching circuit is a gate circuit.
As a further improvement on the present invention, this resonant capacitance has this pre-thermal capacitance at least hundred multiple magnitude capacity.
A kind of method for designing of making above-mentioned filament control device for hot-cathode electric ballast may further comprise the steps:
1) this half-bridge drive circuit output signal frequency is set in the resonance high-frequency range that belongs to this inductance L and resonance capacitor C 2 composition resonant tanks, and this resonant capacitance C2 has this preheating capacitor C 1 at least hundred multiple magnitude capacity;
2) circuit diagram is deformed into equivalent circuit diagram, in the filament pre-heating stage, this resonant switch disconnects and the preheating switch closure is provided with equivalent circuit parameter:
Ik is for importing cathode current
Is is a heater current
Ic is the resonant capacitance electric current
This half-bridge drive circuit output signal frequency is away from the high-frequency range of this inductance and preheating electric capacity composition resonant tank, and the voltage of this half-bridge drive circuit output signal is very low, and deficiency is so that fluorescent tube is lighted a fire, and equivalent electric circuit is equivalent to this fluorescent tube open circuit,
Promptly have: | ik| ≈ | is|, and | id| ≈ 0;
3) at the filament working stage, this resonant switch closure and preheating switch disconnect, this half-bridge drive circuit output signal frequency becomes in the resonance high-frequency range of resonant tank between this inductance with the resonance capacitance group, the voltage of this half-bridge drive circuit output signal is very high, be enough to make this fluorescent tube ionization conducting, equivalent electric circuit is equivalent to this fluorescent tube short circuit
Promptly have: | ik| ≈ | id|, | ic| ≈ 0;
The setting-up time that this control switching circuit has this filament pre-heating of control is 0.4s to a 1s scope.
Useful technique effect of the present invention:
The output signal frequency of this half-bridge drive circuit is set at by this inductance with in the resonance capacitance group becomes the high-frequency range of resonant tank, and the capacity of this resonant capacitance and this pre-thermal capacitance differs hundred multiple magnitudes.
At this fluorescent tube warm-up phase, this this pre-thermal capacitance closure of control switching circuit control, and this resonant capacitance disconnects, the output signal frequency of this half-bridge drive circuit is away from the frequency of being made of resonant tank this inductance and this preheating electric capacity, so the voltage of the output signal of this half-bridge drive circuit is very low, not enough so that this fluorescent tube ionization conducting is equivalent to this fluorescent tube open circuit, this half-bridge drive circuit offers this filament pre-heating electric current by this inductance and pre-thermal capacitance;
In this lamp works stage, this this pre-thermal capacitance of control switching circuit control disconnects, and this resonant capacitance closure, the output signal frequency of this half-bridge drive circuit is positioned at the high frequency frequency range of being made of resonant tank this inductance and this resonant capacitance, so the voltage of the output signal of this half-bridge drive circuit is very high, be enough to make this fluorescent tube ionization conducting, be equivalent to this fluorescent tube short circuit;
This electronic ballast control integrated circuit is according to the heater current warm-up time of setting: 0.4s to 1s scope, control that this preheating switch disconnects and this resonant switch inserts by this control switching circuit, and realize that this fluorescent tube is converted to working stage by warm-up phase.
Therefore be implemented in the lamp tube starting normal operating phase with filament-switching, resonant tank electric capacity and capacity thereof and disconnect, realize the work of fluorescent tube zero current.
Description of drawings
Fig. 1 is the circuit theory schematic diagram of filament control device for hot-cathode electric ballast described in the present invention.
Embodiment
Start fluorescent lamp tube and light work, must satisfy following requirement:
1) fluorescent tube warm-up phase on the one hand need provide filament enough preheat curents, and the voltage of lamp tube ends should be enough low on the other hand, guarantees fluorescent tube not conducting substantially, and cathode fluorescent tube can cold shock not be sent out and filament is suffered damage;
2) the bright working stage of fluorescent tube electricity, the voltage of lamp tube ends should be enough high, impels fluorescent tube to start rapidly, and behind the while fluorescent lamp starting, tube filament should not conducting, prolongs burn-out life like this.
Be further described below contrast Fig. 1:
A kind of filament control device for hot-cathode electric ballast comprises fluorescent tube 1, starts the half-bridge drive circuit 2 of this fluorescent tube, also comprises:
1) controls the electronic ballast control integrated circuit 3 that this half-bridge drive circuit 2 starts;
2) be composed in series the inductance L and the resonance capacitor C 2 of resonant tank between this half-bridge drive circuit 2 and the fluorescent tube 1 successively, the two ends of this resonant capacitance C2 are parallel to a utmost point of this fluorescent tube 1 two ends filament simultaneously;
3) another preheating capacitor C 1 extremely in parallel of this fluorescent tube 1 two ends filament;
4) preheating switch 8 that this preheating capacitor C 1 of a may command of also connecting between the resonant switch 7 that this resonant capacitance of may command C2 inserts or disconnect of connecting between this resonant capacitance C2 and the tube filament, this preheating capacitor C 1 and tube filament inserts or disconnects.
5) be provided with a control switching circuit 9 between this electronic ballast control integrated circuit 3 and this resonant switch 7 and the preheating switch 8, this control switching circuit has the signal controlling input of this electronic ballast control integrated circuit, and the resonance output with this resonant switch access of control or disconnection inserts with this preheating switch of control or the pre-hot output terminal of disconnection, being convenient to control this fluorescent tube inserts this pre-thermal capacitance and disconnects this resonant capacitance simultaneously at this filament pre-heating during the stage, and when the filament working stage, disconnect this pre-thermal capacitance and insert this resonant capacitance simultaneously, filament is opened a way when realizing this fluorescent tube by pre-thermal conversion operate as normal.
A partiting dc capacitor C3 connects between this half-bridge drive circuit 2 and this inductance L.This resonant switch and this preheating switch are the gate circuit switch, and this control switching circuit is a gate circuit.
This electronic ballast control integrated circuit 3 is according to filament preheating time 0.4s to the 1s scope of setting, by the conversion access of these control switching circuit 9 these preheating switch of control and resonance switch room.This resonant capacitance has this pre-thermal capacitance at least hundred multiple magnitude capacity.
The circuit theory of above-mentioned filament control device for hot-cathode electric ballast is design like this, and design procedure comprises:
1) this half-bridge drive circuit output signal frequency is set in the resonance high-frequency range that belongs to this inductance L and resonance capacitor C 2 composition resonant tanks, and this resonant capacitance C2 has this preheating capacitor C 1 at least hundred multiple magnitude capacity;
2) circuit diagram is deformed into equivalent circuit diagram, in the filament pre-heating stage, this resonant switch 7 disconnects and preheating switch 8 closures are provided with equivalent circuit parameter:
Ik is for importing cathode current
Is is a heater current
Ic is the resonant capacitance electric current
This half-bridge drive circuit output signal frequency is away from the high-frequency range of this inductance and preheating electric capacity composition resonant tank, and the voltage of this half-bridge drive circuit output signal is very low, and deficiency is so that fluorescent tube is lighted a fire, and equivalent electric circuit is equivalent to this fluorescent tube open circuit,
Promptly have: | ik| ≈ | is|, and | id| ≈ 0;
3) at the filament working stage, this resonant switch closure and preheating switch disconnect, this half-bridge drive circuit output signal frequency becomes in the resonance high-frequency range of resonant tank between this inductance with the resonance capacitance group, the voltage of this half-bridge drive circuit output signal is very high, be enough to make this fluorescent tube ionization conducting, equivalent electric circuit is equivalent to this fluorescent tube short circuit
Promptly have: | ik| ≈ | id|, | ic| ≈ 0;
4) this control switching circuit (9) have control this filament pre-heating setting-up time be 0.4s to 1s scope, meet the GB15143 standard.This electronic ballast control integrated circuit is according to this filament preheating time of setting, and the conversion of controlling this preheating switch and resonance switch room by this control switching circuit inserts, and is transformed into working stage from the fluorescent tube warm-up phase.
Fluorescent tube is at working stage, the output signal frequency of this half-bridge drive circuit 2 is positioned at the high-frequency range of being made of resonant tank this inductance L and resonance capacitor C 2, therefore this lamp tube ends has high voltage, be enough to make fluorescent tube ionization conducting, equivalent electric circuit is the fluorescent tube short circuit, this tube filament is in open-circuit condition because of the disconnection of preheating switch, so tube filament is in zero current work, has prolonged burn-out life.
Claims (6)
1. filament control device for hot-cathode electric ballast comprises fluorescent tube (1), starts the half-bridge drive circuit (2) of this fluorescent tube, it is characterized in that, also comprises:
1) controls the electronic ballast control integrated circuit (3) that this half-bridge drive circuit (2) starts;
2) be composed in series the inductance L and the resonance capacitor C 2 of resonant tank between this half-bridge drive circuit (2) and the fluorescent tube (1) successively, the two ends of this resonant capacitance C2 are parallel to a utmost point of this fluorescent tube (1) two ends filament simultaneously;
3) another preheating capacitor C 1 extremely in parallel of this fluorescent tube (1) two ends filament;
4) preheating switch (8) that this preheating capacitor C 1 of a may command of also connecting between the resonant switch (7) that this resonant capacitance of may command C2 inserts or disconnect of connecting between this resonant capacitance C2 and the tube filament, this preheating capacitor C 1 and tube filament inserts or disconnects;
5) be provided with a control switching circuit (9) between this electronic ballast control integrated circuit (3) and this resonant switch (7) and the preheating switch (8), this control switching circuit has the signal controlling input of this electronic ballast control integrated circuit, and the resonance output with this resonant switch access of control or disconnection inserts with this preheating switch of control or the pre-hot output terminal of disconnection, being convenient to control this fluorescent tube inserts this pre-thermal capacitance and disconnects this resonant capacitance simultaneously at this filament pre-heating during the stage, and when the filament working stage, disconnect this pre-thermal capacitance and insert this resonant capacitance simultaneously, filament is opened a way when realizing this fluorescent tube by pre-thermal conversion operate as normal.
2. a kind of filament control device for hot-cathode electric ballast as claimed in claim 1 is characterized in that, a partiting dc capacitor C3 connects between this half-bridge drive circuit (2) and this inductance L.
3. a kind of filament control device for hot-cathode electric ballast as claimed in claim 1, it is characterized in that, this electronic ballast control integrated circuit (3) is according to the filament preheating time of setting, and the conversion of controlling this preheating switch and resonance switch room by this control switching circuit (9) inserts.
4. a kind of filament control device for hot-cathode electric ballast as claimed in claim 3 is characterized in that, the setting-up time that this control switching circuit (9) has this filament pre-heating of control is 0.4s to a 1s scope.
5. a kind of filament control device for hot-cathode electric ballast as claimed in claim 1 is characterized in that, this resonant switch and this preheating switch are the gate circuit switch, and this control switching circuit is a gate circuit.
6. a kind of filament control device for hot-cathode electric ballast as claimed in claim 1 is characterized in that, this resonant capacitance has this pre-thermal capacitance at least hundred multiple magnitude capacity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100860130A CN101111115B (en) | 2006-07-19 | 2006-07-19 | Filament control device for hot-cathode electric ballast |
| PCT/CN2007/002002 WO2008011794A1 (en) | 2006-07-19 | 2007-06-27 | A hot cathode electronic ballast filament control device and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100860130A CN101111115B (en) | 2006-07-19 | 2006-07-19 | Filament control device for hot-cathode electric ballast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101111115A CN101111115A (en) | 2008-01-23 |
| CN101111115B true CN101111115B (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100860130A Expired - Fee Related CN101111115B (en) | 2006-07-19 | 2006-07-19 | Filament control device for hot-cathode electric ballast |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101111115B (en) |
| WO (1) | WO2008011794A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652014B (en) * | 2009-09-17 | 2013-06-19 | 来献达 | Electronic ballast |
| WO2013075276A1 (en) * | 2011-11-21 | 2013-05-30 | General Electric Company | Device to preheat filaments in a lighting device |
| CN103298226A (en) * | 2013-06-24 | 2013-09-11 | 蒋祖忠 | Intelligent electronic preheating cutoff ballast |
| CN103763844B (en) * | 2014-01-20 | 2016-03-30 | 李丽群 | Energy-saving fluorescent lamp is lengthened the life and is started module and energy-saving fluorescent lamp |
| CN109982494A (en) * | 2019-04-19 | 2019-07-05 | 深圳市朗文科技实业有限公司 | A kind of electric ballast of sigle-stage AC circuit structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002141183A (en) * | 2000-11-02 | 2002-05-17 | Hitachi Ltd | Fluorescent lamp lighting device |
| CN1630452A (en) * | 2003-12-15 | 2005-06-22 | 上海贝岭股份有限公司 | A fluorescent lamp filament preheating startup apparatus based on frequency conversion technique and design method thereof |
| CN2932914Y (en) * | 2006-07-19 | 2007-08-08 | 苏州市昆士莱照明科技有限公司 | Thermal cathode electronic ballast filament control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR940009513B1 (en) * | 1992-04-22 | 1994-10-14 | 고선웅 | Circuit for igniting fluorescent lamp |
| JPH09260080A (en) * | 1996-03-15 | 1997-10-03 | Matsushita Electric Works Ltd | Discharging lamp lighting device |
-
2006
- 2006-07-19 CN CN2006100860130A patent/CN101111115B/en not_active Expired - Fee Related
-
2007
- 2007-06-27 WO PCT/CN2007/002002 patent/WO2008011794A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002141183A (en) * | 2000-11-02 | 2002-05-17 | Hitachi Ltd | Fluorescent lamp lighting device |
| CN1630452A (en) * | 2003-12-15 | 2005-06-22 | 上海贝岭股份有限公司 | A fluorescent lamp filament preheating startup apparatus based on frequency conversion technique and design method thereof |
| CN2932914Y (en) * | 2006-07-19 | 2007-08-08 | 苏州市昆士莱照明科技有限公司 | Thermal cathode electronic ballast filament control device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008011794A1 (en) | 2008-01-31 |
| CN101111115A (en) | 2008-01-23 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Filament control device for hot-cathode electric ballast and design method thereof Effective date of registration: 20111110 Granted publication date: 20110413 Pledgee: CITIC Bank Limited by Share Ltd Kunshan economic and Technological Development Zone sub branch Pledgor: Suzhou Kunshilai Illumination Technology Co., Ltd. Registration number: 2011990000425 |
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Date of cancellation: 20121019 Granted publication date: 20110413 Pledgee: CITIC Bank Limited by Share Ltd Kunshan economic and Technological Development Zone sub branch Pledgor: Suzhou Kunshilai Illumination Technology Co., Ltd. Registration number: 2011990000425 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Filament control device for hot-cathode electric ballast and design method thereof Effective date of registration: 20121019 Granted publication date: 20110413 Pledgee: CITIC Bank Limited by Share Ltd Kunshan economic and Technological Development Zone sub branch Pledgor: Suzhou Kunshilai Illumination Technology Co., Ltd. Registration number: 2012990000613 |
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