CN103338545A - Fluorescent lamp dimming circuit and operating method thereof - Google Patents
Fluorescent lamp dimming circuit and operating method thereof Download PDFInfo
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- CN103338545A CN103338545A CN2013100106092A CN201310010609A CN103338545A CN 103338545 A CN103338545 A CN 103338545A CN 2013100106092 A CN2013100106092 A CN 2013100106092A CN 201310010609 A CN201310010609 A CN 201310010609A CN 103338545 A CN103338545 A CN 103338545A
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Abstract
The invention discloses a fluorescent lamp dimming circuit and an operating method thereof. The dimming circuit comprises a main circuit, an auxiliary power supply module, a singlechip control module and a driving module. An input power supply Vac is connected with input of the auxiliary power supply module, output of the auxiliary power supply module is connected with power input ends of the singlechip control module and the driving module, the singlechip control module samples input voltage of the main circuit, voltage across both ends of a fluorescent lamp and voltage across both ends of a first capacitor, input of the driving module is connected with a driving signal end of the singlechip control module, and output of the driving module is connected with four switching tubes in the main circuit. The operating method is that a singlechip controls on-off of the four switching tubes according to requirements in adjusting the brightness of the fluorescent lamp so as to change the capacitance across both ends of the first capacitor, thereby changing the voltage across both ends of the fluorescent lamp. The fluorescent lamp dimming circuit and the operating method thereof are mainly used for adjusting the fluorescent lamp under the condition that the power is very low so as to enable the fluorescent lamp not to be completely turned off.
Description
Technical field
The present invention relates to the fluorescent lamp light regulating technology, be specifically related to light adjusting circuit and the method for work thereof of fluorescent lamps such as fluorescent lamp, mercury lamp, sodium vapor lamp.
Background technology
Illumination plays crucial effects in the middle of reducing energy consumption and greenhouse gas emission, can utilize new lighting apparatus such as LED lamp to improve illumination efficiency, but, consumption by reducing electric energy effectively (as some occasions by the people not in transfer fluorescent lamp very dark, the people lightens fluorescent lamp when coming and reduces energy consumption), traditional fluorescent lamp aspect energy-conservation still highly significant.
Picture fluorescent lamp, mercury lamp and these fluorescent lamps of sodium vapor lamp are much higher with respect to bulb efficient, control these fluorescent lamps and are faced with some stern challenges.These electric lights of picture fluorescent lamp are whenever opened once, and its life-span approximately reduces one hour, so can not turn on and off frequently.And a lot of electric ballast of present usefulness such as Buck converter all are to regulate fluorescent lamp brightness by opening the shutoff fluorescent lamp fast continually, the life-span of fluorescent lamp is greatly reduced, and this also is the reason that electric ballast does not come into vogue in regulating the 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 that itself consumes, thereby reached purpose of energy saving.
In order to achieve the above object, the technical scheme taked of the present invention is:
The fluorescent lamp light adjusting circuit, it comprises main circuit, accessory power supply module, single chip control module and driver module; The AC+ of input power supply Vac connects the input of accessory power supply module, AC-ground connection; The output Vcc of accessory power supply module is connected with the power input Vcc of single chip control module and driver module respectively, first voltage sensor, 1 sampling both ends of power voltage, second voltage sensor, 2 sampling C1 both end voltage, tertiary voltage transducer 3 sampling fluorescent lamp both end voltage, first voltage sensor 1, second voltage sensor 2 and tertiary voltage transducer 3 outputs connect the voltage sample end of single chip control module; The input of driver module connects the driving signal end of single chip control module, and first of driver module output drives signal, second and drives the gate pole that signal, the 3rd driving signal and the moving signal of 4 wheel driven correspondingly connect first, second, third in the main circuit and the 4th switching tube respectively.
Further optimize, main circuit comprises first switching tube, second switch pipe, the 3rd switching tube, the switching tube, first diode, second diode, the 3rd diode, the 4th diode, first electric capacity, fluorescent lamp, first voltage sensor, 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, the 3rd switching tube and the 3rd diode inverse parallel, the 4th switching tube and the 4th diode inverse parallel, the drain electrode of first switching tube is connected with the drain electrode of second switch pipe and is formed brachium pontis, the source series of the 3rd switching tube source electrode and the 4th switching tube forms brachium pontis, and the positive pole of first electric capacity connects the drain electrode of first switching tube, and the negative pole of first electric capacity connects the drain electrode of the 3rd switching tube; The input of first voltage sensor and power input parallel connection, the input of second voltage sensor and the first electric capacity parallel connection, the input of tertiary voltage transducer and fluorescent lamp parallel connection, the output of first voltage sensor, second voltage sensor and tertiary voltage transducer connects the voltage sample end of single chip control module; Fluorescent lamp is connected in the main circuit.
Further optimize, the accessory power supply module comprises rectifier bridge Bridge, second electric capacity, the 3rd electric capacity, the 4th electric capacity, first resistance, second resistance, the 5th diode; The second voltage stabilizing chip 7805 that is used for exporting the first voltage stabilizing chip TL783 of 15V direct voltage and is used for output 5V direct voltage; Rectifier bridge Bridge two ends up and down connects AC+ and the AC-two ends of importing power supply Vac respectively, and two ends join with the second electric capacity two ends respectively; The input Vin of the anodal termination first voltage stabilizing chip of 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 the other end ground connection of second resistance with second resistance, one end; One end of first resistance is connected with an end of second resistance, the output end vo ut of another termination first voltage stabilizing chip; The 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 optimize, driver module comprise not gate, the 3rd resistance, the 4th resistance, the 5th electric capacity, the 6th electric capacity, first and door, second with door, four identical driving buffer circuits one, drive buffer circuit two, drive buffer circuit three, driving buffer circuit four; The driving signal of single chip control module output connect respectively not gate input, the 4th resistance an end and first with door and second and an input; The output of not gate connects an end of the 3rd resistance, another termination first and an end of door and an end of the 5th electric capacity, the other end ground connection of the 5th electric capacity of the 3rd resistance; One end of another termination the 6th electric capacity of the 4th resistance and second and the door another input, the other end of the 6th electric capacity is ground connection also; First and second connect respectively with the output of door and to drive buffer circuit one, drive buffer circuit two.
Further optimize, each drives buffer circuit and all comprises the 5th resistance, the 6th resistance, the 5th switching tube, optical coupling isolator, the 7th resistance, the 8th resistance; Drive buffer circuit, drive the 6th resistance one end link first of buffer circuit and the output of door, drive buffer circuit, drive the 6th resistance one end link second of buffer circuit and the output of door, the other end of the 6th resistance connects the base stage of the 5th switching tube, the 5th source ground that opens the light pipe, the 5th collector electrode that opens the light pipe connects the negative electrode of optical coupling isolator input, the anode of optocoupler driver links to each other with the 5th resistance, and the 5th resistance connects the output of the second voltage stabilizing chip in the accessory power supply module; The source electrode of the output termination main circuit driving switch pipe of optical coupling isolator, another output of optical coupling isolator links to each other with the 7th resistance with the 8th resistance, the output of the first voltage stabilizing chip in another termination accessory power supply module of the 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, change the capacitance at the first electric capacity two ends, thereby change the partial pressure value at the first electric capacity two ends, thereby changed the voltage at fluorescent lamp two ends; Single chip machine controlling circuit in the single chip control module receives input supply voltage, the first electric capacity both end voltage and the fluorescent lamp both end voltage that the main circuit sampling obtains, according to fluorescent lamp brightness regulation needs, the break-make of four switching tubes of control changes the size of the capacitance at the first electric capacity two ends then.
Compared with prior art, the present invention has following advantage and technique effect: the present invention has not only solved electric ballast and has frequently cut-off the problem that fluorescent lamp reduces fluorescent lifetime, and also very low with regard to the energy that itself consumes, thereby has reached purpose of energy saving.Single chip control module receives the signal of first voltage sensor, second voltage sensor, tertiary voltage transducer, select first, second, third, fourth switching tube to open the moment of shutoff, thereby change the capacitance of first electric capacity, make the change in voltage of fluorescent lamp, thereby change the brightness of fluorescent lamp.The wide ranges that this fluorescent lamp regulating circuit is regulated can be regulated fluorescent lamp and be made it reach very dark degree and be unlikely to make fluorescent lamp to turn-off.
Description of drawings
Fig. 1 is overall construction drawing of the present invention;
Fig. 2 is the circuit diagram of accessory power supply module of the present invention;
Fig. 3 is the circuit diagram of driver module of the present invention;
Fig. 4 is the driving buffer circuit figure in the 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 has provided the overall construction drawing of the fluorescent lamp light adjusting circuit of example of the present invention, comprising main circuit, and accessory power supply 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, first capacitor C 1, fluorescent lamp, 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, the 3rd switching tube and the 3rd diode inverse parallel, the 4th switching tube and the 4th diode inverse parallel, the drain electrode of first switching tube is connected with the drain electrode of second switch pipe and is formed brachium pontis, the source series of the 3rd switching tube source electrode and the 4th switching tube forms brachium pontis, and the positive pole of first electric capacity connects the drain electrode of first switching tube, and the negative pole of first electric capacity connects the drain electrode of the 3rd switching tube.The input of first voltage sensor 1 and power input parallel connection, the input of second voltage sensor 2 and the first electric capacity parallel connection, the input of tertiary voltage transducer 3 and fluorescent lamp parallel connection, the output of first voltage sensor 1, second voltage sensor 2 and tertiary voltage transducer 3 connects the voltage sample end of single chip control module.Fluorescent lamp is connected in the main circuit.The accessory power supply module is converted into the direct voltage output of 15V and 5V with the alternating voltage of 220V, 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 the single chip control module output drive signal is given driver module.Driver module drives signal with this road and is divided into two groups of driving signals of isolating mutually and removes to drive each and every one switching tube of four in the main circuit, by regulating the conducting moment of first, second, third, fourth switching tube, thereby regulate the capacitance size of first electric capacity, thereby regulate the brightness of fluorescent lamp.
Fig. 2 has provided the circuit diagram of fluorescent lamp light adjusting circuit accessory power supply module, and the accessory power supply module comprises rectifier bridge Bridge, second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the first resistance R 1, second resistance R 2, the 5th diode.The second voltage stabilizing chip 7805 that is used for exporting the first voltage stabilizing chip TL783 of 15V direct voltage and is used for output 5V direct voltage.Rectifier bridge Bridge two ends up and down connects AC+ and the AC-two ends of importing power supply Vac respectively, and two ends join with the second electric capacity two ends respectively.The Vin end of the anodal termination first voltage stabilizing chip of 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 the other end ground connection of second resistance with second resistance, one end.One end of first resistance is connected with an end of second resistance, the output of another termination first voltage stabilizing chip.The 3rd capacitor C 3 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.Rectifier bridge becomes direct voltage with the ac voltage rectifier of 220V, the 4th capacitor C 2 is filter capacitor, the resistance of first resistance and second resistance is regulated the size of TL783 output voltage, and the 3rd capacitor C 3 is the output filter capacitor of the first voltage stabilizing chip TL783 and the input filter capacitor of the second voltage stabilizing chip 7805.The 4th capacitor C 4 is the output filter capacitor of the second voltage stabilizing chip.The 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 comprise not gate U, the 3rd resistance R 3, the 4th resistance R 4, the 5th capacitor C 5, the 6th capacitor C 6, first and door U1, second with door U2, four identical driving buffer circuits one, drive buffer circuit two, drive buffer circuit three, driving buffer circuit four.The driving signal of single chip control module output connect respectively not gate input, the 4th resistance an end and first with door and second and an input.The output of not gate connects an end of the 3rd resistance, another termination first and an end of door and an end of the 5th electric capacity, the other end ground connection of the 5th electric capacity of the 3rd resistance; One end of another termination the 6th electric capacity of the 4th resistance and second and the door another input, the other end of the 6th electric capacity is ground connection also.First and second connect respectively with the output of door and to drive buffer circuit one, drive buffer circuit two.Not gate U carries out the driving signal of single chip control module oppositely, when the high level of not gate U arrives, because the voltage at the 5th capacitor C 5 two ends can not suddenly change, so there is certain delay the time that the rising edge of the first time ratio not gate U output signal that arrives with the rising edge of door U1 output signal arrives, thereby produces Dead Time.Two driving buffer circuit structures are identical, and their effect is that the driving signal is isolated, thereby solved the isolation drive problem of first, second switching tube.Equally for U2, by the constant Dead Time that produces of the 6th capacitor C 6 both end voltage.
Fig. 4 drives the circuit diagram of isolating in the driver module, each drives buffer circuit and all comprises the 5th resistance, the 6th resistance, the 5th switching tube, optical coupling isolator T1, the 7th resistance, the 8th resistance; Drive buffer circuit 1, drive the 6th resistance one end link first of buffer circuit 3 and the output of door, drive buffer circuit 2, drive the 6th resistance one end link second of buffer circuit 4 and the output of door, the other end of the 6th resistance connects the base stage of the 5th switching tube, the 5th source ground that opens the light pipe, the 5th collector electrode that opens the light pipe connects the negative electrode of optical coupling isolator T1 input, the anode of optocoupler driver T1 links to each other with the 5th resistance, and the 5th resistance connects the output of the second voltage stabilizing chip in the accessory power supply 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 links to each other with the 7th resistance with the 8th resistance, the output of the first voltage stabilizing chip in another termination accessory power supply module of the 7th resistance, the grid of another termination main circuit driving switch pipe of the 8th resistance.When the high level that drives signal arrived, the 5th triode was open-minded, the effect of optical coupling isolator T1, and the driving signal is low level, drives the first, the 3rd switching tube conducting.When the low level that drives signal arrived, the 5th triode ended, the effect of optical coupling isolator T1, and the driving signal 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, change the capacitance at first capacitor C, 1 two ends, thereby change the partial pressure value at first capacitor C, 1 two ends, thereby changed the voltage at fluorescent lamp two ends; Single chip machine controlling circuit in the single chip control module receives input supply voltage, first capacitor C, 1 both end voltage and the fluorescent lamp both end voltage that the main circuit sampling obtains, then according to fluorescent lamp brightness regulation needs, conducting by the voltage that records and above-mentioned four switching tubes concerns the high low pulse signal that decides single chip control module output, changes the size of the capacitance at first capacitor C, 1 two ends with this break-make of controlling four switching tubes.
The course of work: single chip control module receives the signal of first voltage sensor 1, second voltage sensor 2, tertiary voltage transducer 3, select first, second, third, fourth switching tube to open the moment of shutoff, thereby change the capacitance of first electric capacity, make the change in voltage of fluorescent lamp, thereby change the brightness of fluorescent lamp.The wide ranges that this fluorescent lamp regulating circuit is regulated can be regulated fluorescent lamp and be made it reach very dark degree and be unlikely to make fluorescent lamp to turn-off.
Claims (6)
1. the fluorescent lamp light adjusting circuit is characterized in that comprising main circuit, accessory power supply module, single chip control module and driver module; The AC+ of input power supply Vac connects the input of accessory power supply module, AC-ground connection; The output Vcc of accessory power supply module is connected with the power input Vcc of single chip control module and driver module respectively, first voltage sensor (1) sampling both ends of power voltage, first electric capacity (C1) both end voltage in second voltage sensor (2) the sampling main circuit, tertiary voltage transducer (3) sampling fluorescent lamp both end voltage, 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 driving signal end of single chip control module, and first of driver module output drives signal, second and drives the gate pole that signal, the 3rd driving signal and the moving signal of 4 wheel driven correspondingly connect first, second, third in the main circuit and the 4th switching tube respectively.
2. fluorescent lamp light adjusting circuit according to claim 1 is characterized in that main circuit comprises first switching tube (Q1), second switch pipe (Q2), the 3rd switching tube (Q3), the switching tube (Q4), first diode (D1), second diode (D2), the 3rd diode (D1), the 4th diode (D2), first electric capacity (C1), fluorescent lamp, first voltage sensor (1), second voltage sensor (2) and tertiary voltage transducer (3); First switching tube and the first diode inverse parallel, second switch pipe and the second diode inverse parallel, the 3rd switching tube and the 3rd diode inverse parallel, the 4th switching tube and the 4th diode inverse parallel, the drain electrode of first switching tube is connected with the drain electrode of second switch pipe and is formed brachium pontis, the source series of the 3rd switching tube source electrode and the 4th switching tube forms brachium pontis, and the positive pole of first electric capacity connects the drain electrode of first switching tube, and the negative pole of first electric capacity connects the drain electrode of the 3rd switching tube; The input of first voltage sensor (1) and power input parallel connection, the input of second voltage sensor (2) and the first electric capacity parallel connection, input and the fluorescent lamp parallel connection of tertiary voltage transducer (3), the output of first voltage sensor (1), second voltage sensor (2) and tertiary voltage transducer (3) connects the voltage sample end of single chip control module; Fluorescent lamp is connected in the main circuit.
3. fluorescent lamp light adjusting circuit according to claim 1, it is characterized in that the accessory power supply module comprises rectifier bridge Bridge, second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), first resistance (R1), second resistance (R2), the 5th diode; The second voltage stabilizing chip 7805 that is used for exporting the first voltage stabilizing chip TL783 of 15V direct voltage and is used for output 5V direct voltage; Rectifier bridge Bridge two ends up and down connects AC+ and the AC-two ends of importing power supply Vac respectively, and two ends join with the second electric capacity two ends respectively; The input Vin of the anodal termination first voltage stabilizing chip of 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 the other end ground connection of second resistance with second resistance, one end; One end of first resistance is connected with an end of second resistance, the output end vo ut of another termination first voltage stabilizing chip; The 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.
4. fluorescent lamp light adjusting circuit according to claim 1, it is characterized in that driver module comprise 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 with door (U2), four identical driving buffer circuits one, drive buffer circuit two, drive buffer circuit three, driving buffer circuit four; The driving signal of single chip control module output connect respectively not gate input, the 4th resistance an end and first with door and second and an input; The output of not gate connects an end of the 3rd resistance, another termination first and an end of door and an end of the 5th electric capacity, the other end ground connection of the 5th electric capacity of the 3rd resistance; One end of another termination the 6th electric capacity of the 4th resistance and second and the door another input, the other end of the 6th electric capacity is ground connection also; First and second connect respectively with the output of door and to drive buffer circuit one, drive buffer circuit two.
5. fluorescent lamp light adjusting circuit according to claim 1 is characterized in that each drives buffer circuit and all comprises the 5th resistance, the 6th resistance, the 5th switching tube, optical coupling isolator (T1), the 7th resistance, the 8th resistance; Drive buffer circuit (1), drive the 6th resistance one end link first of buffer circuit (3) and the output of door, drive buffer circuit (2), drive the 6th resistance one end link second of buffer circuit (4) and the output of door, the other end of the 6th resistance connects the base stage of the 5th switching tube, the 5th source ground that opens the light pipe, the 5th collector electrode that opens the light pipe connects the negative electrode of optical coupling isolator (T1) input, the anode of optocoupler driver (T1) links to each other with the 5th resistance, and the 5th resistance connects the output of the second voltage stabilizing chip in the accessory power supply 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) links to each other with the 7th resistance with the 8th resistance, the output of the first voltage stabilizing chip in another termination accessory power supply module of the 7th resistance, the grid of another termination main circuit driving switch pipe of the 8th resistance.
6. the method for work of fluorescent lamp light adjusting circuit is characterized in that: by voltage divider principle, change the capacitance at first electric capacity (C1) two ends, thereby change the partial pressure value at first electric capacity (C1) two ends, thereby changed the voltage at fluorescent lamp two ends; Single chip machine controlling circuit in the single chip control module receives input supply voltage, first electric capacity (C1) both end voltage and the fluorescent lamp both end voltage that the main circuit sampling obtains, according to fluorescent lamp brightness regulation needs, the break-make of four switching tubes of control changes the size of the capacitance at first electric capacity (C1) two ends then.
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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 CN103338545B (en) | 2016-03-02 |
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| WO2017031880A1 (en) * | 2015-08-27 | 2017-03-02 | 无锡伊佩克科技有限公司 | Method for controlling optically-coupled isolation vehicle-mounted power supply photovoltaic inverter |
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