CN101707841B - Electronic ballast and fluorescent lamp device - Google Patents
Electronic ballast and fluorescent lamp device Download PDFInfo
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- CN101707841B CN101707841B CN 200910109986 CN200910109986A CN101707841B CN 101707841 B CN101707841 B CN 101707841B CN 200910109986 CN200910109986 CN 200910109986 CN 200910109986 A CN200910109986 A CN 200910109986A CN 101707841 B CN101707841 B CN 101707841B
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Abstract
The invention is applicable to the field of fluorescent lamps, and provides an electronic ballast and a fluorescent lamp device. The electronic ballast comprises an EMI circuit, an APFC circuit and an oscillating circuit which are connected in sequence, and also comprises a controlling circuit, an output voltage regulating circuit and a protection circuit; before a fluorescent lamp is turned on, the controlling circuit controls the filament of the fluorescent lamp to be preheated; after the preheating, the controlling circuit controls the fluorescent lamp to be turned on; when the fluorescentlamp works normally, the controlling circuit regulates the operating current of the fluorescent lamp to realize light regulating control. The electronic ballast adopts the controlling circuit to control the preheating time, the preheating frequency and the turn-on time of the filament of the fluorescent lamp, prolongs the service life of the fluorescent lamp, and improves the lumen maintain; in addition, the electronic ballast can also perform light regulation control, improves the energy utilization rate, and is energy-saving and environment-friendly.
Description
Technical field
The invention belongs to field of fluorescent lamps, relate in particular to a kind of electric ballast and fluorescent light fittings.
Background technology
Adopt fluorescent lamp that electric ballast drives because the light efficiency height, characteristic such as energy-conserving and environment-protective and being widely used; Yet existing fluorescent lamp generally is to adopt cold start-up, because the filament impedance of fluorescent lamp is extremely low, therefore the immediate current that produces is very big, and very big to the life-span influence of electric ballast and fluorescent lamp tube, lux maintenance is low simultaneously.
Fluorescent lamp of the prior art also has the pre-thermal design of employing, but lacks the Based Intelligent Control to warm-up time and preheat curent, the useful life that equally also can reduce fluorescent lamp tube.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of electric ballast, is intended to solve the problem that existing fluorescent lamp useful life is short, lux maintenance is low.
The embodiment of the invention is achieved in that a kind of electric ballast, comprises the EMI circuit, APFC circuit and the oscillating circuit that connect in turn, and described electric ballast also comprises:
Control circuit, its input is connected to the power end of described APFC circuit, and first output of described control circuit is connected to the control end of described oscillating circuit;
The output regulating circuit, its input is connected to the output of described oscillating circuit, and the output of described output regulating circuit connects fluorescent lamp; And
Protective circuit, its input are connected to second output of described control circuit, and the output of described protective circuit connects fluorescent lamp;
Before described fluorescent lamp lighting, the filament that described control circuit is controlled described fluorescent lamp carries out preheating; After the preheating, described control circuit is controlled described fluorescent lamp and is lighted a fire; When described fluorescent lamp operate as normal, described control circuit is regulated the operating current of described fluorescent lamp, realizes brightness adjustment control.
Further, described control circuit comprises: the frequency modulation module; Setting that first between end 1 and the ground stores up/release the warm-up time that is connected described frequency modulation module can element C3, is used for setting warm-up time; The maximum oscillation frequency that is connected in series in described frequency modulation module is successively set resistance R 3, resistance R 4 and the resistance R 5 of end 2, is used for setting maximum oscillation frequency; Be connected on in-phase input end 7 and the resistance R between the ground 6 and capacitor C 4 of the integrated operational amplifier in the inside of described frequency modulation module successively, described resistance R 6 and the end that is connected in series of capacitor C 4 are connected to the sliding end of adjustable resistance R4; Be connected the resistance R 7 of inverting input 6 with the described fluorescent lamp negative pole of the integrated operational amplifier in the inside of described frequency modulation module; Be connected the capacitor C 5 between the output 5 of the inverting input 6 of the integrated operational amplifier in the inside of described frequency modulation module and operational amplifier; The minimum oscillation frequency that anode is connected to described frequency modulation module by resistance R 2 is set the diode D1 that end 4, negative electrode are connected to the output 5 of the integrated operational amplifier in the inside of described frequency modulation module; Be connected to Fault Control end 9 and the resistance R 8 between the ground and the capacitor C 6 of described frequency modulation module; The frequency of oscillation that is connected described frequency modulation module sets that second between end 3 and the ground stores up/release can element C2, is used for setting frequency of oscillation; Be connected the minimum oscillation frequency setting end 4 of described frequency modulation module and the resistance R 1 between the ground, be used for setting minimum oscillation frequency; And be connected in that first between the positive pole of described fluorescent lamp and the negative pole store up/release in parallel can element C1, be used for cutting off the operating current of described fluorescent lamp.
Further, described frequency modulation module is that model is the frequency modulation chip of L6574.
Further, described protective circuit comprises: resistance R 11, resistance R 12, resistance R 13 and diode D2, the negative electrode of described diode is connected to the Fault Control end 9 of described frequency modulation module, the positive pole that the anode of described diode D2 is connected to described fluorescent lamp by the resistance R 13 that is connected in series successively and resistance R 12; One end of described resistance R 11 is connected to the power voltage terminal 12 of described frequency modulation module, and the other end of described resistance R 11 is connected to the fault detect end 8 of described frequency modulation module.
Further, described oscillating circuit comprises: first switching tube, its control end is connected to the high drive output 15 of described frequency modulation module by resistance R 16, described first control end of switching tube also is connected to the output 14 of described frequency modulation module by resistance R 17, first end of described first switching tube is connected to the output of described APFC circuit; The second switch pipe, its control end is connected to the low drive output 11 of described frequency modulation module by resistance R 14, the control end of described second switch pipe also is connected to second end of described second switch pipe by resistance R 15, second end of described second switch pipe is by resistance R 9 ground connection, and first end of described second switch pipe is connected to second end of described first switching tube; Described first control end of switching tube is controlled first end of described first switching tube and conducting or the disconnection between second end, and the control end of described second switch pipe is controlled first end of described second switch pipe and conducting or the disconnection between second end; The link that first end of described second switch pipe is connected with second end of described first switching tube is connected with the output 14 of described frequency modulation module, and the link that first end of described second switch pipe is connected with second end of described first switching tube also is connected with the input of described output regulating circuit as the output of described oscillating circuit.
Further, described output regulating circuit comprises: inductance L 1, capacitor C 7 and the capacitor C 8 that is connected in parallel with described capacitor C 7; One end of described inductance L 1 is connected to the link that first end of described second switch pipe is connected with second end of described first switching tube, and the other end of described inductance L 1 is connected to the positive pole of described fluorescent lamp by described capacitor C 7.
Another purpose of the embodiment of the invention is to provide a kind of fluorescent light fittings, and it comprises fluorescent lamp and the electric ballast that is connected with described fluorescent lamp, and described electric ballast is above-mentioned electric ballast.
Electric ballast provided by the invention adopts control circuit to controlling warm-up time, pre-heat frequency and the duration of ignition of Filament of fluorescent lamp, has prolonged the useful life of fluorescent lamp, has improved lux maintenance; Can also carry out brightness adjustment control in addition, improve rate of energy, energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the modular structure schematic diagram of the electric ballast that provides of the embodiment of the invention;
Fig. 2 is the circuit diagram of APFC circuit in the electric ballast that provides of the embodiment of the invention;
Fig. 3 is the circuit diagram of control circuit in the electric ballast that provides of the embodiment of the invention;
Fig. 4 is the frequency change waveform schematic diagram of the electric ballast that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
The electric ballast that the embodiment of the invention provides adopts control circuit to controlling warm-up time, pre-heat frequency and the duration of ignition of Filament of fluorescent lamp, has prolonged the useful life of fluorescent lamp, has improved lux maintenance.
The electric ballast 10 that the embodiment of the invention provides is mainly used in the fluorescent light fittings, drives fluorescent lamp 20 work; Wherein, the modular structure of electric ballast 10 for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 1, and details are as follows.
In embodiments of the present invention, before fluorescent lamp 20 was lighted, 10 pairs of filaments of electric ballast carried out pre-thermal control, and warm-up time, pre-heat frequency and preheat curent all are controllable, have prolonged the useful life of Filament of fluorescent lamp widely; Carry out after the preheating " igniting ", electric ballast 10 can be controlled the duration of ignition and initial firing current, had improved the performance of entire equipment; After fluorescent lamp 20 was lighted, electric ballast 10 can be controlled the operating current of fluorescent lamp, has increased dimming effect; And the heater current of fluorescent lamp 20 can be cut off by electric ballast 10, thereby reduced the working temperature of fluorescent lamp 20 and the power loss of entire circuit, improved rate of energy.
Fig. 2 and Fig. 3 show the physical circuit of electric ballast 10 respectively, for convenience of explanation, only show the part relevant with the embodiment of the invention, and details are as follows.
As shown in Figure 2, EMI circuit 101 comprises capacitor C 14, is connected in the two ends that exchange input in parallel; The effect of EMI circuit 101 is filterings by exchanging the various interference signals that input brings, and prevents from forming high frequency and disturbs and scurry.
As shown in Figure 3, control circuit 103 comprises: the frequency modulation module; Setting that first between end and the ground stores up/release the warm-up time that is connected the frequency modulation module can element, is used for setting warm-up time; The maximum oscillation frequency that is connected in series in the frequency modulation module is successively set resistance R 3, resistance R 4 and the resistance R 5 of end, is used for setting maximum oscillation frequency; The frequency of oscillation that is connected the frequency modulation module sets that second between end and the ground stores up/release can element, is used for setting frequency of oscillation; Be connected the minimum oscillation frequency setting end of frequency modulation module and the resistance R 1 between the ground, be used for setting minimum oscillation frequency; Being connected in that first between the positive pole of fluorescent lamp 20 and the negative pole store up/release in parallel can element, is used for cutting off the operating current of fluorescent lamp.
As one embodiment of the present of invention, above-mentioned storage/release and can all can adopt electric capacity by element.
In embodiments of the present invention, can to adopt model be the frequency modulation chip of L6574 to the frequency modulation module; Wherein this chip comprises 16 pins, and the 1st pin CPRE sets end warm-up time, and the 1st pin is by being used for setting capacitor C 3 ground connection of warm-up time; The 2nd pin RPRE is that maximum oscillation frequency is set end, and the 2nd pin is by being used for setting the resistance R that is connected in series successively 3, resistance R 4 and resistance R 5 ground connection of maximum oscillation frequency, and wherein resistance R 4 is adjustable resistance; The 3rd pin CF is that frequency of oscillation is set end, and the 3rd pin is by being used for setting capacitor C 2 ground connection of frequency of oscillation; The 4th pin RIGN is that minimum oscillation frequency is set end, and the 4th pin is by being used for setting resistance R 1 ground connection of minimum oscillation frequency; The 5th pin OPout is the output of the integrated operational amplifier in inside, the 6th pin OPin-is the inverting input of the integrated operational amplifier in inside, the 7th pin OPin+ is the in-phase input end of the integrated operational amplifier in inside, resistance R 6 and capacitor C 4 are connected in series between the 7th pin and the ground successively, and resistance R 6 is held the sliding end that is connected to adjustable resistance R4 with being connected in series of capacitor C 4; The 6th pin is connected to the negative pole of fluorescent lamp 20 by resistance R 7, and the negative electrode of diode D1 is connected to the 5th pin, and the negative electrode of diode D1 also is connected to the 6th pin by capacitor C 5, and the anode of diode D1 is connected to the 4th pin by resistance R 2; The 4th pin, the 5th pin, diode D1 and resistance R 2 have been formed a feedback control loop; The 8th pin EN1 is the fault detect end, and the 9th pin EN2 is " igniting " Fault Control end, and the 9th pin is by resistance R 8 ground connection, also by capacitor C 6 ground connection; The 10th pin GND holds with being, the direct ground connection of the 10th pin; The 11st pin LVG is low drive output, and the 12nd pin VS is power voltage terminal, and the 12nd pin is connected to the 8th pin of L6561 chip; The 13rd pin N.C. is unsettled does not connect (not shown among Fig. 3); The 14th pin OUT is output, the 15th pin HVG is high drive output, the 16th pin VBOOT is the bootstrap power supply voltage end, the 16th pin is connected with an end of capacitor C 9, the other end of capacitor C 9 is connected with an end of capacitor C 10, and the other end of capacitor C 10 is successively by resistance R 18 and diode D4 ground connection; One end of capacitor C 1 is connected to the positive pole of fluorescent lamp 20, and the other end of capacitor C 1 is connected to the negative pole of fluorescent lamp 20.
In embodiments of the present invention, oscillating circuit 104 comprises: first switching tube, second switch pipe, resistance R 9, resistance R 14, resistance R 15, resistance R 16 and resistance R 17, wherein first control end of switching tube is connected to the 15th pin of L6574 chip by resistance R 16, first control end of switching tube also is connected to the 14th pin of L6574 chip by resistance R 17, first end of first switching tube is connected to the output of APFC circuit; The control end of second switch pipe is connected to the 11st pin of L6574 chip by resistance R 14, the control end of second switch pipe also is connected to second end of second switch pipe by resistance R 15, second end of second switch pipe is by resistance R 9 ground connection, and first end of second switch pipe is connected to second end of first switching tube; First control end of switching tube is controlled first end of first switching tube and conducting or the disconnection between second end, first end of the control end control second switch pipe of second switch pipe and conducting or the disconnection between second end; The link that first end of second switch pipe is connected with second end of first switching tube is connected with the 14th pin of L6574 chip, and the link that first end of second switch pipe is connected with second end of first switching tube also is connected with the input of output regulating circuit 105 as the output of oscillating circuit 104.
As one embodiment of the present of invention, first switching tube can adopt metal-oxide-semiconductor Q1, and the second switch pipe can adopt metal-oxide-semiconductor Q2, also can adopt the components and parts of other any on-off action.
In embodiments of the present invention, the output regulating circuit comprises: inductance L 1, capacitor C 7 and capacitor C 8; One end of inductance L 1 is connected to the link that first end of second switch pipe is connected with second end of first switching tube, and the other end of inductance L 1 is connected to the positive pole of fluorescent lamp 20 by capacitor C 7, and capacitor C 8 is connected in parallel with capacitor C 7.
In embodiments of the present invention, protective circuit 106 comprises: resistance R 11, resistance R 12, resistance R 13 and diode D2, the negative electrode of diode D2 is connected to the 9th pin of L6574 chip, the positive pole that the anode of diode D2 is connected to fluorescent lamp 20 by the resistance R 13 that is connected in series successively and resistance R 12; One end of resistance R 11 is connected to the 12nd pin of L6574 chip, and the other end of resistance R 11 is connected to the 8th pin of L6574 chip.
In order to illustrate further the electron rectifier that the embodiment of the invention provides, existing in conjunction with Fig. 2 and Fig. 3 in detail its operation principle to be described in detail as follows:
The alternating current input is through EMI circuit 101, rectification unit, IC1 chip and peripheral cell are formed APFC circuit 102 and are arrived control circuit 103 again, in order to make electric ballast 10 reliable operations, the fluorescent tube of fluorescent lamp 20 is guaranteed useful life, and the operating frequency of electric ballast 10 rule over time should meet variation relation shown in Figure 4; Shown in Fig. 4 is exactly the pre-heat frequency fmax of fluorescent lamp 20, this pre-heat frequency fmax should keep when electric ballast 10 is started working a period of time (CA warm-up time of fluorescent lamp 20), begin to drop to the normal working frequency fmin of fluorescent lamp 20 then, be exactly the duration of ignition of fluorescent lamp 20 transit time (AB).
The 1st pin of IC2 chip, the 2nd pin, the 3rd pin and the 4th pin are used for determining pre-heat frequency, warm-up time, spark rate, the duration of ignition and the normal working frequency of fluorescent lamp 20; The oscillating circuit 104 and the charge and discharge capacitance that form by IC2 chip internal and external circuit decide frequency and time parameter; The capacitor C 3 that is connected the 1st pin of IC2 chip is used for setting warm-up time, and the discharging current that is connected to the capacitor C 2 of the 3rd pin can determine the driving signal frequency of external half-bridge power transistor Q1, Q2; Between warming up period, the charging current of the capacitor C 2 that the 3rd pin of IC2 chip connects is determined by the electric current of the 4th pin of the 2nd pin that flows into, flows out the IC2 chip and IC2 chip.When the voltage of the 2nd pin of IC2 chip, the 4th pin is 2V, flows out the 2nd pin of IC2 chip and the electric current of the 4th pin and be inversely proportional to their external resistance values.Can artificially select different resistance values, capacitance can obtain circuitry needed operating frequency and needed time as required.The 8th pin EN1 of IC2 chip and the 9th pin EN2 are the pins for electric ballast 10 error protections, and effective control level of the 8th pin EN1 and the 9th pin EN2 is high level; When the 9th pin EN2 be input as high level signal the time, force circuit to be started working by the circulation of preheating again, igniting, work, when the 8th pin EN1 is high level, then turn-off the IC2 chip.The 9th pin EN2 of IC2 chip is used for " igniting " Fault Control of fluorescent lamp 20, and the circuit for lamp error protection that the 8th pin EN1 of IC2 chip can/replacing fluorescent tube not in place for detection of lamp.There is a circuit for lamp operating state to detect at the IC2 chip internal and uses operational amplifier, it can be used for the closed-loop control of circuit for lamp, can add a reference voltage its in-phase input end of this operational amplifier (being the 7th pin of IC2 chip), and the signal that and lamp current are directly proportional is added to its inverting input (being the 6th pin of IC2 chip), by diode D1 and resistance R 2 the 4th, 5 pins of IC2 chip are connected to form feedback control loop; Like this, if when the electric current of lamp load change to surpass the reference voltage value that in-phase end sets, output is incorporated into the feedback of the 6th pin of IC2 chip by resistance R 7; Diode D1 conducting this moment, the electric current that flows out IC2 chip the 4th pin has strengthened a part again, cause the charging current of the capacitor C 2 of IC2 chip the 3rd pin to strengthen, namely the frequency of the half-bridge drive circuit of being made up of metal-oxide-semiconductor Q1 and Q2 rises, because the effect of ballast inductance L1 makes the electric current of lamp load descend; Therefore, can change the operating current of fluorescent lamp by the reference voltage value that changes IC2 chip the 7th pin, thereby reach the purpose of light modulation.
After energising, the filament of fluorescent lamp 20 begins preheating, and this moment, operating frequency and the operating current of fluorescent lamp 20 were the highest; Obtain high starting resistor from the capacitor C 1 that is connected fluorescent lamp 20 two ends, the fluorescent tube of fluorescent lamp 20 is started, in the start-up course, operating current and the frequency of fluorescent lamp 20 reduce gradually, start fully up to fluorescent lamp 20 fluorescent tubes, reach stable operating current and operating frequency, the capacitor C 1 that can be connected in series by the lamp tube ends at fluorescent lamp 20 disconnects heater current fully, make the filament of fluorescent lamp 20 be in lower working temperature, thereby prolonged the useful life of fluorescent lamp 20 fluorescent tubes; Owing to increased the failure protection function of entire circuit, improved the reliability of circuit simultaneously.Concrete, compared with prior art, the electric ballast that the embodiment of the invention provides can be brought up to the useful life of fluorescent lamp tube more than 20000 hours, and 16000 hours lux maintenance can be increased near 90% by traditional 50%; Entire circuit is simple in structure in addition, and energy-conserving and environment-protective can reduce the about 3W of power of fluorescent tube, and system power dissipation reduces about 5-7%.
The electric ballast that the embodiment of the invention provides adopts control circuit to controlling warm-up time, pre-heat frequency and the duration of ignition of Filament of fluorescent lamp, has prolonged the useful life of fluorescent lamp, has improved lux maintenance; Can also carry out brightness adjustment control in addition, improve rate of energy, energy-conserving and environment-protective.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. an electric ballast comprises the EMI circuit, APFC circuit and the oscillating circuit that connect in turn, it is characterized in that described electric ballast also comprises:
Control circuit, its input is connected to the power end of described APFC circuit, and first output of described control circuit is connected to the control end of described oscillating circuit;
The output regulating circuit, its input is connected to the output of described oscillating circuit, and the output of described output regulating circuit connects fluorescent lamp; And
Protective circuit, its input are connected to second output of described control circuit, and the output of described protective circuit connects fluorescent lamp;
Before described fluorescent lamp lighting, the filament that described control circuit is controlled described fluorescent lamp carries out preheating; After the preheating, described control circuit is controlled described fluorescent lamp and is lighted a fire; When described fluorescent lamp operate as normal, described control circuit is regulated the operating current of described fluorescent lamp, realizes brightness adjustment control;
Described control circuit comprises:
Frequency modulation module, described frequency modulation module are that model is the frequency modulation chip of L6574;
Setting warm-up time that is connected described frequency modulation module holds first between (1) and the ground to store up/release energy element (C3), is used for setting warm-up time;
The maximum oscillation frequency that is connected in series in described frequency modulation module is successively set resistance R 3, resistance R 4 and the resistance R 5 of end (2), be used for setting maximum oscillation frequency, wherein resistance R 4 is adjustable resistance, the sliding end of resistance R 4 connects the operational amplifier in-phase input end of described frequency modulation inside modules, and this sliding end is also by capacitor C 4 ground connection;
Be connected on in-phase input end (7) and the resistance R between the ground 6 and capacitor C 4 of the integrated operational amplifier in the inside of described frequency modulation module successively, described resistance R 6 and the end that is connected in series of capacitor C 4 are connected to the sliding end of adjustable resistance R4;
Be connected the resistance R 7 of inverting input (6) with the described fluorescent lamp negative pole of the integrated operational amplifier in the inside of described frequency modulation module;
Be connected the capacitor C 5 between the output (5) of the inverting input (6) of the integrated operational amplifier in the inside of described frequency modulation module and operational amplifier;
The minimum oscillation frequency that anode is connected to described frequency modulation module by resistance R 2 is set the diode D1 that end (4), negative electrode are connected to the output (5) of the integrated operational amplifier in the inside of described frequency modulation module;
Be connected to the Fault Control end (9) of described frequency modulation module and resistance R 8 and the capacitor C 6 between the ground;
The frequency of oscillation setting that is connected described frequency modulation module holds second between (3) and the ground to store up/release energy element (C2), is used for setting frequency of oscillation;
The minimum oscillation frequency that is connected described frequency modulation module is set the resistance R 1 of holding between (4) and the ground, is used for setting minimum oscillation frequency; And
Being connected in that first between the positive pole of described fluorescent lamp and the negative pole store up/release in parallel can element (C1), is used to described fluorescent lamp that high starting voltage is provided.
2. electric ballast as claimed in claim 1 is characterized in that, described protective circuit comprises:
Resistance R 11, resistance R 12, resistance R 13 and diode D2,
The negative electrode of described diode is connected to the Fault Control end (9) of described frequency modulation module, the positive pole that the anode of described diode D2 is connected to described fluorescent lamp by the resistance R 13 that is connected in series successively and resistance R 12;
One end of described resistance R 11 is connected to the power voltage terminal (12) of described frequency modulation module, and the other end of described resistance R 11 is connected to the fault detect end (8) of described frequency modulation module.
3. electric ballast as claimed in claim 1 is characterized in that, described oscillating circuit comprises:
First switching tube, its control end is connected to the high drive output (15) of described frequency modulation module by resistance R 16, described first control end of switching tube also is connected to the output (14) of described frequency modulation module by resistance R 17, first end of described first switching tube is connected to the output of described APFC circuit;
The second switch pipe, its control end is connected to the low drive output (11) of described frequency modulation module by resistance R 14, the control end of described second switch pipe also is connected to second end of described second switch pipe by resistance R 15, second end of described second switch pipe is by resistance R 9 ground connection, and first end of described second switch pipe is connected to second end of described first switching tube;
Described first control end of switching tube is controlled first end of described first switching tube and conducting or the disconnection between second end, and the control end of described second switch pipe is controlled first end of described second switch pipe and conducting or the disconnection between second end;
The link that first end of described second switch pipe is connected with second end of described first switching tube is connected with the output (14) of described frequency modulation module, and the link that first end of described second switch pipe is connected with second end of described first switching tube also is connected with the input of described output regulating circuit as the output of described oscillating circuit.
4. electric ballast as claimed in claim 3 is characterized in that, described output regulating circuit comprises:
Inductance L 1, capacitor C 7 and the capacitor C 8 that is connected in parallel with described capacitor C 7;
One end of described inductance L 1 is connected to the link that first end of described second switch pipe is connected with second end of described first switching tube, and the other end of described inductance L 1 is connected to the positive pole of described fluorescent lamp by described capacitor C 7.
5. fluorescent light fittings, it comprises fluorescent lamp and the electric ballast that is connected with described fluorescent lamp, it is characterized in that, described electric ballast is each described electric ballast of claim 1-4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910109986 CN101707841B (en) | 2009-11-03 | 2009-11-03 | Electronic ballast and fluorescent lamp device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910109986 CN101707841B (en) | 2009-11-03 | 2009-11-03 | Electronic ballast and fluorescent lamp device |
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| CN101707841A CN101707841A (en) | 2010-05-12 |
| CN101707841B true CN101707841B (en) | 2013-09-04 |
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| CN 200910109986 Expired - Fee Related CN101707841B (en) | 2009-11-03 | 2009-11-03 | Electronic ballast and fluorescent lamp device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101848587B (en) * | 2010-06-30 | 2015-02-25 | 浙江大邦科技有限公司 | Electronic ballast as well as ignition control device and ignition method thereof |
| CN102497713B (en) * | 2011-11-16 | 2014-06-11 | 上海浪腾电子科技有限公司 | Electrodeless lamp dimming circuit and method |
| CN102752949B (en) * | 2012-06-26 | 2014-08-20 | 日银Imp微电子有限公司 | Pre-heating type electronic ballast control chip |
| CN104244543A (en) * | 2014-09-17 | 2014-12-24 | 安徽亮亮电子科技有限公司 | Light adjusting and illuminating system based on electronic ballast controller |
| CN105657948A (en) * | 2014-11-13 | 2016-06-08 | 广东雪莱特光电科技股份有限公司 | Electronic energy saving lamp driving circuit and electronic energy saving lamp |
| CN105792490A (en) * | 2014-12-26 | 2016-07-20 | 江苏豪迈照明科技有限公司 | Electronic ballast and driving method therefor, and metal halogen lamp system |
| CN107332451A (en) * | 2017-07-26 | 2017-11-07 | 浙江佩洁尔医疗科技有限公司 | A kind of Switching Power Supply of plasma reactor |
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| CN201114946Y (en) * | 2007-05-25 | 2008-09-10 | 宏景电子(芜湖)有限公司 | Dual vertical tube electronic ballast |
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| CN2636585Y (en) * | 2003-06-13 | 2004-08-25 | 龙裕斌 | High performance fully digital controlled dimming electron ballast |
| CN2845392Y (en) * | 2005-10-29 | 2006-12-06 | 阮树成 | Electronic fluorescent ballast with frequency converting pre-heating, re-starting and abnormal protecting |
| CN201018703Y (en) * | 2007-03-13 | 2008-02-06 | 李江淮 | Improved electronic ballast for power factor correcting circuit |
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