CN2932914Y - Thermal cathode electronic ballast filament control device - Google Patents
Thermal cathode electronic ballast filament control device Download PDFInfo
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- CN2932914Y CN2932914Y CN 200620074967 CN200620074967U CN2932914Y CN 2932914 Y CN2932914 Y CN 2932914Y CN 200620074967 CN200620074967 CN 200620074967 CN 200620074967 U CN200620074967 U CN 200620074967U CN 2932914 Y CN2932914 Y CN 2932914Y
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- filament
- preheating
- switch
- control
- circuit
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Abstract
A thermionic cathode electron ballast filament control device, comprising a tube, a semi-bridge driving circuit and an electron ballast control integrated circuit, wherein an inductance L and a resonance capacity C2 are connected in series between the semi-bridge driving circuit and the tube, the two ends of the resonance capacity C2 are connected in parallel with the one end of a filament of the tube; the other end of the filament of the tube is connected in parallel with a preheating capacity C1; a resonance switch which can control the resonance capacity C2 is connected in series between the resonance capacity C2 and the filament of the tube, a preheating switch which can control the preheating capacity C1 is connected in series between the preheating capacity C1 and the filament of the tube, the switched control circuit is arranged between the electron ballast control integrated circuit and the resonance switch and the preheating switch, and the electron ballast control integrated circuit uses the switched control circuit to control that the tube connects with the preheating capacity and cuts off the resonance capacity at the filament preheating stage, the tube cuts off the preheating capacity and connects with the resonance capacity at the filament working stage, and the preheating switch and the resonance switch shift according to the preheating time, thereby realizing that the tube works normally when the filament is open circuit.
Description
Technical field
The utility model belongs to a kind of circuit of electronic ballast, belongs 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 utility model provides a kind of filament control device for hot-cathode electric ballast and method for designing of filament zero current can realize the luminous work of fluorescent lamp the time.
The technical solution of the utility model 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 further improvement of the utility model, a partiting dc capacitor C3 connects between this half-bridge drive circuit and this inductance L.
As further improvement of the utility model, 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 further improvement of the utility model, the setting-up time that this control switching circuit has this filament pre-heating of control is 0.4s to a 1s scope.
As further improvement of the utility model, this resonant switch and this preheating switch are the gate circuit switch, and this control switching circuit is a gate circuit.
As further improvement of the utility model, this resonant capacitance has this pre-thermal capacitance at least hundred multiple magnitude capacity.
Useful technique effect of the present utility model:
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 utility model.
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:
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, 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, 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 of fluorescent lamp pre-heating control device 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 of fluorescent lamp pre-heating control device 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620074967 CN2932914Y (en) | 2006-07-19 | 2006-07-19 | Thermal cathode electronic ballast filament control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620074967 CN2932914Y (en) | 2006-07-19 | 2006-07-19 | Thermal cathode electronic ballast filament control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932914Y true CN2932914Y (en) | 2007-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620074967 Expired - Fee Related CN2932914Y (en) | 2006-07-19 | 2006-07-19 | Thermal cathode electronic ballast filament control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2932914Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111115B (en) * | 2006-07-19 | 2011-04-13 | 苏州市昆士莱照明科技有限公司 | Filament control device for hot-cathode electric ballast |
| CN102026456A (en) * | 2010-12-23 | 2011-04-20 | 北京熙远兴业科技发展有限公司 | Electronic ballast and power supply unit |
-
2006
- 2006-07-19 CN CN 200620074967 patent/CN2932914Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111115B (en) * | 2006-07-19 | 2011-04-13 | 苏州市昆士莱照明科技有限公司 | Filament control device for hot-cathode electric ballast |
| CN102026456A (en) * | 2010-12-23 | 2011-04-20 | 北京熙远兴业科技发展有限公司 | Electronic ballast and power supply unit |
| CN102026456B (en) * | 2010-12-23 | 2014-01-15 | 北京熙远兴业科技发展有限公司 | Electronic ballast and power supply unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Nicera Electrical Appliance Co., Ltd. Assignor: Suzhou Kunshilai Illumination Technology Co., Ltd. Contract fulfillment period: 2007.12.9 to 2014.12.8 Contract record no.: 2008320000688 Denomination of utility model: Filament control device for hot-cathode electric ballast and design method thereof Granted publication date: 20070808 License type: Exclusive license Record date: 20081009 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.12.9 TO 2014.12.8; CHANGE OF CONTRACT Name of requester: KUNSHAN NISAILA ELECTRON EQUIPMENT CO., LTD. Effective date: 20081009 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Filament control device for hot-cathode electric ballast and design method thereof Effective date of registration: 20101222 Granted publication date: 20070808 Pledgee: Huaxia Bank, Limited by Share Ltd, Suzhou branch Pledgor: Suzhou Kunshilai Illumination Technology Co., Ltd. Registration number: 2010990001021 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20110719 |