CN103338545B - A kind of fluorescent lamp light adjusting circuit and method of work thereof - Google Patents
A kind of fluorescent lamp light adjusting circuit and method of work thereof Download PDFInfo
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- CN103338545B CN103338545B CN201310010609.2A CN201310010609A CN103338545B CN 103338545 B CN103338545 B CN 103338545B CN 201310010609 A CN201310010609 A CN 201310010609A CN 103338545 B CN103338545 B CN 103338545B
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Abstract
The invention discloses a kind of fluorescent lamp light adjusting circuit and method of work thereof, described light adjusting circuit comprises main circuit, auxiliary power module, single chip control module, driver module; Input power Vac connects the input of auxiliary power module, the output of auxiliary power module is connected with the power input of single chip control module and driver module respectively, the voltage at the single chip control module sampling input voltage of main circuit, the voltage at fluorescent lamp two ends and the first electric capacity two ends, the input of driver module connects the drive singal end of single chip control module, and the output of driver module connects four switching tubes in main circuit.Method of work be single-chip microcomputer according to fluorescent lamp brightness regulation needs, control the size that the break-make of four switching tubes changes the capacitance at the first electric capacity two ends, change the voltage at fluorescent lamp two ends.The present invention is mainly used in carrying out adjustment when power is very low to fluorescent lamp makes fluorescent lamp be unlikely to turn off completely.
Description
Technical field
The present invention relates to fluorescent lamp light regulating technology, be specifically related to light adjusting circuit and the method for work thereof of the fluorescent lamps such as fluorescent lamp, mercury lamp, sodium vapor lamp.
Background technology
Illumination plays vital effect in the middle of minimizing energy ezpenditure and greenhouse gas emission, new lighting apparatus can be utilized if LED is to improve illumination efficiency, but, by effectively reduce electric energy consumption (as some occasions by people not in fluorescent lamp is adjusted very dark, people lightens fluorescent lamp to reduce energy ezpenditure when coming), traditional fluorescent lamp in energy-conservation still highly significant.
These fluorescent lamps of picture fluorescent lamp, mercury lamp and sodium vapor lamp are much higher relative to bulb efficiency, control these fluorescent lamps and are faced with some stern challenges.These electric lights of picture fluorescent lamp, often open once, its life-span approximately reduces one hour, so can not turn on and off frequently.And current a lot of electric ballast such as Buck converter is all regulate fluorescent lamp brightness by opening shutoff fluorescent lamp fast continually, the life-span of fluorescent lamp is greatly reduced, and this is also the reason that electric ballast does not come into vogue in adjustment fluorescent lamp field.
Summary of the invention
In view of above background, in order to overcome existing deficiency, the invention provides a kind of fluorescent lamp light adjusting circuit and method of work thereof, not only solve electron rectifier and frequently cut-off the problem that fluorescent lamp reduces fluorescent lifetime, and also very low with regard to the energy itself consumed, thus reach energy-conservation object.
In order to achieve the above object, the technical scheme that the present invention takes is:
Fluorescent lamp light adjusting circuit, it comprises main circuit, auxiliary power module, single chip control module and driver module; The AC+ of input power Vac connects the input of auxiliary power module, AC-ground connection; The output Vcc of auxiliary power module is connected with the power input Vcc of single chip control module and driver module respectively, first voltage sensor 1 is sampled both ends of power voltage, second voltage sensor 2 is sampled C1 both end voltage, tertiary voltage transducer 3 is sampled fluorescent lamp both end voltage, and the first voltage sensor 1, second voltage sensor 2 and tertiary voltage transducer 3 output connect the voltage sample end of single chip control module; The input of driver module connects the drive singal end of single chip control module, and the first drive singal that driver module exports, the second drive singal, the 3rd drive singal and four-wheel drive signal correspondingly connect the gate pole of the first, second, third and fourth switching tube in main circuit respectively.
Further optimization, main circuit comprises the first switching tube, second switch pipe, the 3rd switching tube, the switching tube, the first diode, the second diode, the 3rd diode, the 4th diode, the first electric capacity, fluorescent lamp, the first voltage sensor, the second voltage sensor and tertiary voltage transducer; First switching tube and the first diode inverse parallel, second switch pipe and the second diode inverse parallel, 3rd switching tube and the 3rd diode inverse parallel, 4th switching tube and the 4th diode inverse parallel, first switching tube drain electrode forms brachium pontis with the drain series of second switch pipe, the source series of the 3rd switching tube source electrode and the 4th switching tube forms brachium pontis, and the positive pole of the first electric capacity connects the drain electrode of the first switching tube, and the negative pole of the first electric capacity connects the drain electrode of the 3rd switching tube; The input of the first voltage sensor and power input parallel connection, the input of the second voltage sensor and the first Capacitance parallel connection, the input of tertiary voltage transducer and fluorescent lamp parallel connection, the output of the first voltage sensor, the second voltage sensor and tertiary voltage transducer connects the voltage sample end of single chip control module; Daylight lamp string is associated in main circuit.
Further optimization, auxiliary power module comprises rectifier bridge Bridge, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first resistance, the second resistance, the 5th diode; For exporting the first voltage stabilizing chip TL783 of 15V direct voltage and the second voltage stabilizing chip 7805 for exporting 5V direct voltage; The upper and lower two ends of rectifier bridge Bridge connect AC+ and the AC-two ends of input power Vac respectively, and two ends connect with the second electric capacity two ends respectively; The input Vin of the positive pole termination first voltage stabilizing chip of the second electric capacity, the output end vo ut of the first voltage stabilizing chip meets the input Vin of the second voltage stabilizing chip, and the output end vo ut of the second voltage stabilizing chip is connected with the input Vcc of one-chip computer module and driver module; The earth terminal of the first voltage stabilizing chip is connected with second resistance one end, the other end ground connection of the second resistance; One end of first resistance is connected with one end of the second resistance, the output end vo ut of another termination first voltage stabilizing chip; 3rd electric capacity connects the input of the second voltage stabilizing chip, other end ground connection; The output of the 4th capacitance cathode termination second voltage stabilizing chip, other end ground connection; The output end vo ut of positive termination second voltage-stabiliser tube of the 5th diode, the input Vin of another termination second voltage stabilizing chip.
Further optimization, driver module comprises not gate, the 3rd resistance, the 4th resistance, the 5th electric capacity, the 6th electric capacity, first and door, second and door, four identical driving isolation circuit one, driving isolation circuit two, driving isolation circuit three, driving isolation circuit four; The drive singal that single chip control module exports connects the input of not gate, one end of the 4th resistance and first and door and second and an input of door respectively; The output of not gate connects one end of the 3rd resistance, another termination first of the 3rd resistance and one end of door and one end of the 5th electric capacity, the other end ground connection of the 5th electric capacity; One end of another termination the 6th electric capacity of the 4th resistance and second and another input of door, the other end also ground connection of the 6th electric capacity; First and second connect driving isolation circuit one, driving isolation circuit two respectively with the output of door.
Further optimization, each driving isolation circuit comprises the 5th resistance, the 6th resistance, the 5th switching tube, optical coupling isolator, the 7th resistance, the 8th resistance; 6th resistance one end link first of driving isolation circuit, driving isolation circuit and the output of door, 6th resistance one end link second of driving isolation circuit, driving isolation circuit and the output of door, the other end of the 6th resistance connects the base stage of the 5th switching tube, 5th source ground opening the light pipe, 5th collector electrode opening the light pipe connects the negative electrode of optical coupling isolator input, the anode of optocoupler driver is connected with the 5th resistance, and the 5th resistance connects the output of the second voltage stabilizing chip in auxiliary power module; The source electrode of the output termination main circuit driving switch pipe of optical coupling isolator, another output of optical coupling isolator is connected with the 7th resistance with the 8th resistance, the output of the first voltage stabilizing chip in another termination auxiliary power module of 7th resistance, the grid of another termination main circuit driving switch pipe of the 8th resistance.
The method of work of above-mentioned fluorescent lamp light adjusting circuit: by voltage divider principle, changes the capacitance at the first electric capacity two ends, thus changes the partial pressure value at the first electric capacity two ends, thus changes the voltage at fluorescent lamp two ends; Single chip machine controlling circuit in single chip control module receives main circuit and to sample the input supply voltage, the first electric capacity both end voltage and the fluorescent lamp both end voltage that obtain, then according to fluorescent lamp brightness regulation needs, the break-make controlling four switching tubes changes the size of the capacitance at the first electric capacity two ends.
Compared with prior art, tool of the present invention has the following advantages and technique effect: the present invention not only solves electric ballast and frequently cut-offs the problem that fluorescent lamp reduces fluorescent lifetime, and also very low with regard to the energy itself consumed, thus reaches energy-conservation object.Single chip control module receives the signal of the first voltage sensor, the second voltage sensor, tertiary voltage transducer, first, second, third, fourth switching tube is selected to open the moment of shutoff, thus change the capacitance of the first electric capacity, make the change in voltage of fluorescent lamp, thus change the brightness of fluorescent lamp.The wide ranges that this fluorescent lamp regulating circuit regulates, can regulate fluorescent lamp to make it reach very dark degree and be unlikely to fluorescent lamp is turned off.
Accompanying drawing explanation
Fig. 1 is overall construction drawing of the present invention;
Fig. 2 is the circuit diagram of auxiliary power module of the present invention;
Fig. 3 is the circuit diagram of driver module of the present invention;
Fig. 4 is the driving isolation circuit diagram in driver module of the present invention;
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further, but enforcement of the present invention and protection range are not limited thereto.
Fig. 1 gives the overall construction drawing of the fluorescent lamp light adjusting circuit of example of the present invention, comprising main circuit, and auxiliary power module, single chip control module, driver module.Main circuit comprises the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the first diode D1, the second diode D2, the 3rd diode D1, the 4th diode D2, the first electric capacity C1, fluorescent lamp, the first voltage sensor 1, second voltage sensor 2, tertiary voltage transducer 3.First switching tube and the first diode inverse parallel, second switch pipe and the second diode inverse parallel, 3rd switching tube and the 3rd diode inverse parallel, 4th switching tube and the 4th diode inverse parallel, first switching tube drain electrode forms brachium pontis with the drain series of second switch pipe, the source series of the 3rd switching tube source electrode and the 4th switching tube forms brachium pontis, and the positive pole of the first electric capacity connects the drain electrode of the first switching tube, and the negative pole of the first electric capacity connects the drain electrode of the 3rd switching tube.The input of the first voltage sensor 1 and power input parallel connection, the input of the second voltage sensor 2 and the first Capacitance parallel connection, the input of tertiary voltage transducer 3 and fluorescent lamp parallel connection, the output of the first voltage sensor 1, second voltage sensor 2 and tertiary voltage transducer 3 connects the voltage sample end of single chip control module.Daylight lamp string is associated in main circuit.The alternating voltage of 220V is converted into the direct voltage output of 15V and 5V by auxiliary power module, as the accessory power supply of single chip control module and driver module.Three voltage sensor sampled voltage signals input to single chip control module, and single chip control module output drive signal is to driver module.This road drive singal is divided into two groups of mutually isolated drive singal and goes to drive four each and every one switching tubes in main circuit by driver module, by regulating the turn-on instant of first, second, third, fourth switching tube, thus regulate the capacitance size of the first electric capacity, thus regulate the brightness of fluorescent lamp.
Fig. 2 gives the circuit diagram of fluorescent lamp light adjusting circuit auxiliary power module, and auxiliary power module comprises rectifier bridge Bridge, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the first resistance R1, the second resistance R2, the 5th diode.For exporting the first voltage stabilizing chip TL783 of 15V direct voltage and the second voltage stabilizing chip 7805 for exporting 5V direct voltage.The upper and lower two ends of rectifier bridge Bridge connect AC+ and the AC-two ends of input power Vac respectively, and two ends connect with the second electric capacity two ends respectively.The Vin end of the positive pole termination first voltage stabilizing chip of the second electric capacity, the output end vo ut of the first voltage stabilizing chip meets the input Vin of the second voltage stabilizing chip, and the output end vo ut of the second voltage stabilizing chip is connected with the input Vcc of one-chip computer module and driver module.The earth terminal of the first voltage stabilizing chip is connected with second resistance one end, the other end ground connection of the second resistance.One end of first resistance is connected with one end of the second resistance, the output of another termination first voltage stabilizing chip.3rd electric capacity C3 connects the input of the second voltage stabilizing chip, other end ground connection.The output of the 4th capacitance cathode termination second voltage stabilizing chip, other end ground connection.The output end vo ut of positive termination second voltage-stabiliser tube of the 5th diode, the input Vin of another termination second voltage stabilizing chip.The ac voltage rectifier of 220V is become direct voltage by rectifier bridge, 4th electric capacity C2 is filter capacitor, the resistance of the first resistance and the second resistance regulates the size of TL783 output voltage, and the 3rd electric capacity C3 is the output filter capacitor of the first voltage stabilizing chip TL783 and the input filter capacitor of the second voltage stabilizing chip 7805.4th electric capacity C4 is the output filter capacitor of the second voltage stabilizing chip.5th diode protection voltage stabilizing chip 7805, provides a discharge loop.TL783 and 7805 exports the direct voltage of 15V and 5V respectively, as the power supply of each control circuit of internal system.
Fig. 3 is the circuit diagram of driver module, driver module comprises not gate U, the 3rd resistance R3, the 4th resistance R4, the 5th electric capacity C5, the 6th electric capacity C6, first and door U1, second and door U2, four identical driving isolation circuit one, driving isolation circuit two, driving isolation circuit three, driving isolation circuit four.The drive singal that single chip control module exports connects the input of not gate, one end of the 4th resistance and first and door and second and an input of door respectively.The output of not gate connects one end of the 3rd resistance, another termination first of the 3rd resistance and one end of door and one end of the 5th electric capacity, the other end ground connection of the 5th electric capacity; One end of another termination the 6th electric capacity of the 4th resistance and second and another input of door, the other end also ground connection of the 6th electric capacity.First and second connect driving isolation circuit one, driving isolation circuit two respectively with the output of door.The drive singal of single chip control module carries out oppositely by not gate U, when the high level of not gate U arrives, because the voltage at the 5th electric capacity C5 two ends can not suddenly change, so there is certain delay the time that the time that the first rising edge outputed signal with door U1 arrives arrives than the rising edge that not gate U outputs signal, thus produce Dead Time.Two driving isolation circuit structures are identical, and their effect is isolated by drive singal, thus solve the isolation drive problem of first, second switching tube.Same for U2, produce Dead Time by the 6th electric capacity C6 both end voltage is constant.
Fig. 4 is the circuit diagram of driving isolation in driver module, and each driving isolation circuit comprises the 5th resistance, the 6th resistance, the 5th switching tube, optical coupling isolator T1, the 7th resistance, the 8th resistance; 6th resistance one end link first of driving isolation circuit 1, driving isolation circuit 3 and the output of door, 6th resistance one end link second of driving isolation circuit 2, driving isolation circuit 4 and the output of door, the other end of the 6th resistance connects the base stage of the 5th switching tube, 5th source ground opening the light pipe, 5th collector electrode opening the light pipe connects the negative electrode of optical coupling isolator T1 input, the anode of optocoupler driver T1 is connected with the 5th resistance, and the 5th resistance connects the output of the second voltage stabilizing chip in auxiliary power module; The source electrode of the output termination main circuit driving switch pipe of optical coupling isolator T1, another output of optical coupling isolator T1 is connected with the 7th resistance with the 8th resistance, the output of the first voltage stabilizing chip in another termination auxiliary power module of 7th resistance, the grid of another termination main circuit driving switch pipe of the 8th resistance.When the high level of drive singal arrives, the 5th triode is open-minded, the effect of optical coupling isolator T1, and drive singal is low level, drives the first, the 3rd switching tube conducting.When the low level of drive singal arrives, the 5th triode cut-off, the effect of optical coupling isolator T1, drive singal is high level, drives the second, the 4th switching tube conducting.
In the method for work of fluorescent lamp light adjusting circuit, the method for work of above-mentioned fluorescent lamp light adjusting circuit: by voltage divider principle, changes the capacitance at the first electric capacity C1 two ends, thus changes the partial pressure value at the first electric capacity C1 two ends, thus changes the voltage at fluorescent lamp two ends; Single chip machine controlling circuit in single chip control module receives main circuit and to sample the input supply voltage, the first electric capacity C1 both end voltage and the fluorescent lamp both end voltage that obtain, then according to fluorescent lamp brightness regulation needs, decide by the conducting relation of the voltage recorded and above-mentioned four switching tubes the high low pulse signal that single chip control module exports, the break-make controlling four switching tubes with this changes the size of the capacitance at the first electric capacity C1 two ends.
The course of work: single chip control module receives the signal of the first voltage sensor 1, second voltage sensor 2, tertiary voltage transducer 3, first, second, third, fourth switching tube is selected to open the moment of shutoff, thus change the capacitance of the first electric capacity, make the change in voltage of fluorescent lamp, thus change the brightness of fluorescent lamp.The wide ranges that this fluorescent lamp regulating circuit regulates, can regulate fluorescent lamp to make it reach very dark degree and be unlikely to fluorescent lamp is turned off.
Claims (1)
1. a fluorescent lamp light adjusting circuit, is characterized in that comprising main circuit, auxiliary power module, single chip control module and driver module; The AC-of input power Vac connects auxiliary power module, the first voltage sensor, tertiary voltage transducer, and AC+ connects one end of the rectifier bridge in auxiliary power module; The output Vcc of auxiliary power module is connected with the power input Vcc of single chip control module and driver module respectively, first voltage sensor sampling both ends of power voltage, first electric capacity (C1) both end voltage in second voltage sensor sampling main circuit, tertiary voltage sensor sample fluorescent lamp both end voltage; The input of driver module connects the drive singal end of single chip control module, and the first drive singal that driver module exports, the second drive singal, the 3rd drive singal and four-wheel drive signal correspondingly connect the grid of the first, second, third and fourth switching tube in main circuit respectively; Main circuit comprises the first switching tube (Q1), second switch pipe (Q2), the 3rd switching tube (Q3), the 4th switching tube (Q4), the first diode (D1), the second diode (D2), the 3rd diode (D3), the 4th diode (D4), the first electric capacity (C1), fluorescent lamp, the first voltage sensor, the second voltage sensor and tertiary voltage transducer; First switching tube and the first diode inverse parallel, second switch pipe and the second diode inverse parallel, 3rd switching tube and the 3rd diode inverse parallel, 4th switching tube and the 4th diode inverse parallel, first switching tube drain electrode forms brachium pontis with the drain series of second switch pipe, the source series of the 3rd switching tube source electrode and the 4th switching tube forms brachium pontis, and the positive pole of the first electric capacity connects the drain electrode of the first switching tube, and the negative pole of the first electric capacity connects the source electrode of the 3rd switching tube; First voltage sensor and power sources in parallel, second voltage sensor and the first Capacitance parallel connection, tertiary voltage transducer and fluorescent lamp parallel connection, the output of the first voltage sensor, the second voltage sensor and tertiary voltage transducer connects the voltage sample end of single chip control module; Daylight lamp string is associated in main circuit; Auxiliary power module comprises rectifier bridge Bridge, the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the first resistance (R1), the second resistance (R2), the 5th diode; For exporting the first voltage stabilizing chip TL783 of 15V direct voltage and the second voltage stabilizing chip 7805 for exporting 5V direct voltage; The upper and lower two ends of rectifier bridge Bridge connect AC+ and the AC-two ends of input power Vac respectively, and output connects with the second electric capacity two ends respectively; The input Vin of the positive pole termination first voltage stabilizing chip of the second electric capacity, the output end vo ut of the first voltage stabilizing chip meets the input Vin of the second voltage stabilizing chip, and the output end vo ut of the second voltage stabilizing chip is connected with the input Vcc of single chip control module and driver module; The earth terminal of the first voltage stabilizing chip is connected with second resistance one end, the other end ground connection of the second resistance; One end of first resistance is connected to the tie point of the second resistance and the first voltage stabilizing chip TL783 earth terminal, the output end vo ut of another termination first voltage stabilizing chip; 3rd electric capacity (C3) connects the input of the second voltage stabilizing chip, other end ground connection; The output of the 4th capacitance cathode termination second voltage stabilizing chip, other end ground connection; The output end vo ut of the positive termination second voltage stabilizing chip of the 5th diode, the input Vin of another termination second voltage stabilizing chip; Driver module comprises not gate (S1), the 3rd resistance (R3), the 4th resistance (R4), the 5th electric capacity (C5), the 6th electric capacity (C6), first and door (U1), second and door (U2), four identical driving isolation circuit one, driving isolation circuit two, driving isolation circuit three, driving isolation circuit four; The drive singal that single chip control module exports connects the input of not gate, one end of the 4th resistance and first and door and second and an input of door respectively; The output of not gate connects one end of the 3rd resistance, another termination first of the 3rd resistance and another input of door and one end of the 5th electric capacity, the other end ground connection of the 5th electric capacity; One end of another termination the 6th electric capacity of the 4th resistance and second and another input of door, the other end also ground connection of the 6th electric capacity; First and second connect driving isolation circuit one, driving isolation circuit two respectively with the output of door; Each driving isolation circuit comprises the 5th resistance, the 6th resistance, the 5th switching tube, optical coupling isolator (T1), the 7th resistance, the 8th resistance; The 6th resistance one end of driving isolation circuit one, driving isolation circuit three connects the output of first and door, the 6th resistance one end of driving isolation circuit two, driving isolation circuit four connects the output of second and door, the other end of the 6th resistance connects the base stage of the 5th switching tube, the grounded emitter of the 5th switching tube, the collector electrode of the 5th switching tube connects the negative electrode of optical coupling isolator (T1) input, the anode of optical coupling isolator (T1) is connected with the 5th resistance, and the 5th resistance connects the output of the second voltage stabilizing chip in auxiliary power module; The source electrode of the output termination main circuit driving switch pipe of optical coupling isolator (T1), another output of optical coupling isolator (T1) is connected with the 7th resistance with the 8th resistance, the output of the first voltage stabilizing chip in another termination auxiliary power module of 7th resistance, the grid of another termination main circuit driving switch pipe of the 8th resistance; By changing the capacitance at the first electric capacity (C1) two ends, thus change the partial pressure value at the first electric capacity (C1) two ends, thus change the voltage at fluorescent lamp two ends; Single chip machine controlling circuit in single chip control module receives main circuit and to sample the input supply voltage, the first electric capacity (C1) both end voltage and the fluorescent lamp both end voltage that obtain, then according to fluorescent lamp brightness regulation needs, the break-make controlling four switching tubes changes the size of the capacitance at the first electric capacity (C1) two ends.
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| CN201310010609.2A CN103338545B (en) | 2013-01-12 | 2013-01-12 | A kind of fluorescent lamp light adjusting circuit and method of work thereof |
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| CN201310010609.2A CN103338545B (en) | 2013-01-12 | 2013-01-12 | A kind of fluorescent lamp light adjusting circuit and method of work thereof |
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| CN103338545B true CN103338545B (en) | 2016-03-02 |
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| CN104837269A (en) * | 2015-05-15 | 2015-08-12 | 重庆星联云科科技发展有限公司 | LED drive power supply with auxiliary power supply |
| CN105119513A (en) * | 2015-08-27 | 2015-12-02 | 无锡伊佩克科技有限公司 | Control method for optically-coupled isolation vehicle power supply photovoltaic inverter |
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| JP2009218000A (en) * | 2008-03-07 | 2009-09-24 | Omron Corp | Illuminating lamp control apparatus |
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