CN103338576B - DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp - Google Patents

DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp Download PDF

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CN103338576B
CN103338576B CN201310155872.0A CN201310155872A CN103338576B CN 103338576 B CN103338576 B CN 103338576B CN 201310155872 A CN201310155872 A CN 201310155872A CN 103338576 B CN103338576 B CN 103338576B
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phase
power
push
power supply
resistance
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CN103338576A (en
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阮树成
阮雪芬
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Abstract

The invention relates to the technical field of electric light source lighting, and particularly relates to a DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp which comprises a fluorescent lamp tube, a DC low-voltage power supply, a reference crystal oscillator, a phase dimming chip, a push-pull amplifier, a push-pull oscillator and a power synthesis coupler, wherein output of the phase dimming chip and the voltage controlled oscillator (VCO) is connected to the push-pull amplifier and fed into an adding coupler through a transformer T1 and a transformer T3 of the push-pull oscillator; synthesized power and booster voltage are matched with and turn on the lamp tube; reference crystal oscillator signals are injected to the voltage controlled oscillator (VCO) through a frequency divider to lock the phase; the transformer T1 of the push-pull amplifier and the transformer T3 of the push-pull oscillator carry out power synthesis, cross coupling and injection locking, and frequency pulling is coherent with the push-pull oscillator to lock the phase synchronously; and large-power lighting is acquired, thereby avoiding too high temperature rise of devices, changes in oscillation frequency, unbalance of the power and reduction of the lamplight. The DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp is applied to dimming fluorescent lamp lighting occasions with DC low voltage and large-current power supply.

Description

DC low voltage power supply note lock power combing fluorescent lamp
Technical field
The present invention relates to electric source lighting technical field, specifically a kind of DC low voltage power supply note lock power combing fluorescent lamp.
Background technology
General LC or the RC oscillator of prior art electric ballast is as fluorescent light, the frequency of oscillation produced is poor by temperature change stability, affect the unstable light intensity of power to decline, especially the DC low voltage power supply fluorescent lamp operation of powering is at low-voltage, big current, although this electric ballast, features simple structure, cost is low.Because power electric is forced down, obtain high-power illumination certainly will increased device electric current, and cause the too high frequency of oscillation that causes of hunting power pipe power consumption sharp increase temperature rise to change, result can make light unbalance with frequency change power magnitude.Meanwhile, big current by coil temperature rise high magnetic permeability decline, saturation inductors amount diminish impedance trend zero, light fixture operating time and temperature rise direct ratio, device aging is accelerated in temperature rise, and gently then the unstable brightness of lamp luminescence declines, heavy then burn out device reduction of service life.Authorization Notice No. CN202068649U is two pushes away vibration inverter power synthesis dragging large-power lamp, solves the restriction of device power capacity.But power combing oscillating voltage phase place should be consistent, unbalanced to overcome non-linear intermodulation power.In addition, high power strong optical illumination light is non-adjustable both wasted electric energy, and the impairment work of optic pollution environmental impact eyesight or life.
Summary of the invention
The object of this invention is to provide DC low voltage power supply low-voltage, big current powers, inversion is vibrated the phase locked a kind of DC low voltage power supply note lock power combing fluorescent lamp of high frequency stabilization.
The technology of the present invention solution is: comprise DC low voltage power supply, fluorescent tube, benchmark crystal oscillator, frequency divider, model is the phase dimming chip of IR21592, push-pull amplifier, pusb pull oscilator, be added coupler, abnormal condition of lamp tube detector, wherein, benchmark crystal oscillator is by quartz-crystal resonator, two inverters and resistance capacitance composition, first inverter constrained input two ends cross-over connection resistance is biased, and difference earth electric capacity, simultaneously, the also quartz-crystal resonator of cross-over connection series connection trimmer, benchmark crystal oscillator output signal is through second inverter shaping buffering access frequency divider, phase dimming chip, chip includes voltage controlled oscillator VCO, phase discriminator, recommend amplification driving circuit, detect lamp load current phase circuit CS, phase dimming interface, lamp load exception control SD, power end V dDby resistance step-down, capacitor filtering access DC low voltage power supply, VCO external capacitor produces vibration, lamp load current phase circuit CS is detected in fluorescent tube sampling access in fluorescent tube ballast inductance, capacitor resonance point phase place, by chip internal to phase discriminator one end, light modulation direct voltage connects phase dimming interface DIM, the phase discriminator other end is accessed through phase dimming interface by chip internal voltage controlled oscillator VCO, phase discriminator exports and meets VCO through constant-current source, VCO exports to connect and recommends amplification driving circuit, drive output HO, LO connect push-pull amplifier, and power output is through transformer T 1with pusb pull oscilator output transformer T 3feed-in is added coupler power synthesis, boosting coupling fluorescent tube starter, benchmark crystal oscillator injects phase dimming chip VCO locking phase through the reference signal capacitance partial pressure of frequency divider frequency division, synthesized mutual coupling by push-pull amplifier and pusb pull oscilator and note and lock frequency pulling coherent synchronization locking phase, two high-power MOS field effect transistor Q of pusb pull oscilator being added coupler power 3, Q 4drain electrode connection transformer T 3resonant inductance L 4two ends, grid meets transformer T 2feedback inductance L 8two ends, inductance L 8central point connects the field effect transistor Q of source ground simultaneously 5drain electrode and resistance R 7, R 8one end, two high-power MOS field effect transistor Q 3, Q 4source electrode is through earth resistance R 9voltage drop, by resistance R 11current sampling and abnormal condition of lamp tube detector signal are by resistance R 12access field effect transistor Q 5grid, controls pusb pull oscilator two high-power MOS field effect transistor Q during abnormal condition of lamp tube 3, Q 4cut-off, quick failure of oscillation makes it be protected, inductance L 7series resistance R 10with transformer T 3inductance L 5closed, inductance L 4central point series inductance L 9rear access DC low voltage power supply, inductance L 9the one end be connected with DC low voltage power supply is also connected to shunt capacitance C 9, shunt capacitance C 9other end ground connection, abnormal condition of lamp tube detector signal is through resistance access phase dimming chip lamp load exception control SD, abnormal condition of lamp tube detector signal connects pusb pull oscilator fet gate through resistance, DC low voltage power supply access benchmark crystal oscillator, frequency divider, push-pull amplifier, pusb pull oscilator power end.
The present invention produces good effect: solve DC low voltage power supply low pressure, big current powers self-excitation and it swashs and twoly pushes away vibration injection phase-locking height frequency stabilization Phase synchronization power combing, reach single push-pull oscillator or recommend amplification and be difficult to obtain high-power dimming fluorescent lighting, avoid device temperature rise frequency of oscillation to change power imbalances, steady light increases the service life.
Accompanying drawing explanation
Fig. 1 technical solution of the present invention theory diagram
Fig. 2 benchmark crystal oscillating circuit
Fig. 3 DC low voltage power supply note lock power combing fluorescent lamp circuit
Embodiment
With reference to Fig. 1,2,3, the specific embodiment of the invention and embodiment: comprise DC low voltage power supply 1, fluorescent tube 8, benchmark crystal oscillator 2, frequency divider 3, model are the phase dimming chip 4 of IR21592, push-pull amplifier 5, pusb pull oscilator 6, be added coupler 7, abnormal condition of lamp tube detector 9, wherein, benchmark crystal oscillator 2 is by quartz-crystal resonator JT, two inverter ics 1, IC 2and resistance R 1, electric capacity C 0, C 1, C 2composition, first inverter ic 1constrained input two ends cross-over connection resistance R 1biased, and difference earth electric capacity C 1, C 2, meanwhile, also cross-over connection series connection trimming capacitor C 0quartz-crystal resonator JT, benchmark crystal oscillator 2 outputs signal through second inverter ic 2shaping buffering access frequency divider 3, phase dimming chip 4, i.e. chip IC 4model IR21592, includes voltage controlled oscillator VCO, phase discriminator, recommends amplification driving circuit, detects lamp load current phase circuit CS, phase dimming interface, lamp load exception control SD, power end V dDby resistance R 19step-down, electric capacity C 8filtering access DC low voltage power supply, VCO external capacitor C 4produce vibration, fluorescent tube 8 ballast inductance L 12, electric capacity C 11resonance point phase place detects lamp load current phase circuit CS in fluorescent tube sampling access, by chip internal to phase discriminator one end, light modulation direct voltage 1-5V connects phase dimming interface DIM, the phase discriminator other end is accessed through phase dimming interface by chip internal voltage controlled oscillator VCO, phase discriminator exports and meets VCO through constant-current source, VCO exports to connect and recommends amplification driving circuit, and drive output HO, LO connect push-pull amplifier 5, and power output is through transformer T 1with pusb pull oscilator 6 output transformer T 3feed-in is added coupler 7 power combing, and boosting coupling fluorescent tube 8 starter, benchmark crystal oscillator 2 is through the reference signal fo electric capacity C of frequency divider 3 frequency division ÷ N 3, C 5dividing potential drop injects phase dimming chip 4 voltage controlled oscillator VCO locking phase, is noted by push-pull amplifier 5 and pusb pull oscilator 6 and locks frequency pulling coherent synchronization locking phase, two high-power MOS field effect transistor Q of pusb pull oscilator 6 being added the mutual coupling of coupler 7 power combing 3, Q 4drain electrode connection transformer T 3resonant inductance L 4two ends, grid meets transformer T 2feedback inductance L 8two ends, inductance L 8central point connects the field effect transistor Q of source ground simultaneously 5drain electrode and resistance R 7, R 8one end, two high-power MOS field effect transistor Q 3, Q 4source electrode is through earth resistance R 9voltage drop, by resistance R 11current sampling and abnormal condition of lamp tube detector signal are by resistance R 12access field effect transistor Q 5grid, controls pusb pull oscilator two high-power MOS field effect transistor Q during abnormal condition of lamp tube 3, Q 4cut-off, quick failure of oscillation makes it be protected, inductance L 7series resistance R 10with transformer T 3inductance L 5closed, inductance L 4central point series inductance L 9rear access DC low voltage power supply, inductance L 9the one end be connected with DC low voltage power supply is also connected to shunt capacitance C 9, shunt capacitance C 9other end ground connection, abnormal condition of lamp tube detector signal is through resistance access phase dimming chip lamp load exception control SD, and abnormal condition of lamp tube detector 9 signal is through resistance R 12meet pusb pull oscilator 6 field effect transistor Q 5grid, DC low voltage power supply 1 accesses benchmark crystal oscillator 2, frequency divider 3, push-pull amplifier 5, pusb pull oscilator 6 power end+V.
IC 4pin mark function: V dDpower end, VCO voltage controlled oscillator, DIM phase dimming interface, HO drives Q 1, LO drives Q 2, CS detects lamp load current phase information, SD lamp load exception control, COM ground connection.
Push-pull amplifier drives Q by phase dimming chip external excited oscillation 1, Q 2, conducting in turn, cut-off half cycle; Pusb pull oscilator self-oscillation Q 3, Q 4conducting in turn, cut-off half cycle, two power output that pushes away drags large-power lamp through being added coupler superposition synthesis, and dilatation is reliable, but requires that two oscillating voltage phase places are consistent, to eliminate the stable power output of the unbalanced acquisition of non-linear intermodulation power.For this reason, introduce injection phase-locking and solve power combing Phase synchronization technology.
Benchmark crystal oscillator quartz resonator frequency is minimum, highly stable by variations in temperature.Reference signal injects phase dimming chip voltage controlled oscillator VCO locking phase through frequency divider.Do not inject reference signal VCO and produce free oscillation frequency, inject reference signal VCO oscillating voltage and its Vector modulation, by VCO non-linear frequency mixing locking phase, oscillator signal and injection reference signal only have a fixing phase difference.Synchronization bandwidth and injecting power direct ratio, with VCO loaded Q inverse ratio, because reference signal injects VCO input, gain is high, and small-power locks.Reference signal frequency division injects apolegamy HF Quartz Resonantor, is easy to locking tens of to hundreds of kilo hertzs of LC or RC oscillators.Frequency divider IC 3binary system or decade counter frequency division.
Injection phase-locking is without the need to voltage-controlled tuning, phase demodulation, loop filtering, and circuit structure is simple, and superior performance, fringe cost is low.Be added the two power output that pushes away of coupler superposition to synthesize, " closely bundling " mutual coupling note lock effect push-pull amplifier traction pusb pull oscilator frequency coherence genlocing phase place.Injection phase-locking there is not difference with looped phase locking in essence, and be applicable to large-power lamp stable oscillation stationary vibration frequency plot synchronous, avoid the too high power imbalances of device temperature rise, steady light increases the service life.
Be added coupler T 4inductance L 10output power transformer T is recommended by two 1, T 3inductance L 2, L 6anti-phase exciting current superposition, phase difference 180 ° of low-order harmonics are cancelled out each other, and output current conversion doubles summation and delivers to lamp load, balance resistance R when two electric currents are equal 14no power waste.
Phase dimming takes from fluorescent tube ballast inductance L 12, electric capacity C 11resonance point, lamp load current phase compares with injection reference signal fo phase place phase demodulation, and higher than resonance point lamp current leading voltage, lower than resonance point lamp current lagging voltage, current/voltage phase difference is little, and power is large, light is strong, and vice versa.Control phase dimming interface direct voltage DC 1-5V changes voltage controlled oscillator VCO phase deviation, makes push-pull amplifier and pusb pull oscilator voltage-phase simultaneous bias, regulates RP 1voltage changes lamplight brightness, realizes high-power lamp light modulation.
Pusb pull oscilator T 2, T 3dual transformer vibrates, T 3can not be saturated, effect is high.Resonance frequency adjusts L 4, oscillatory feedback adjusts resistance R 10or inductance L 5, do not involve mutually.
Lamp abnormal current magnet ring inductance L 13voltage diode VD 1detection, resistance R 15, electric capacity C 14filtering is through resistance R 12, electric capacity C 10make Q 5conducting, pusb pull oscilator power tube Q 3, Q 4cut-off; Vibration driving chip lamp failure controller SD controls failure of oscillation, protection push-pull amplifier Q 1, Q 2.Meanwhile, lamp abnormal current resistance R 6pressure drop is through resistance R 4, electric capacity C 6open vibration driving chip current detecting CS, protection Q 1, Q 2; Lamp abnormal current resistance R 9pressure drop is through resistance R 11, electric capacity C 10and then make Q 5conducting, duplicate protection Q 3, Q 4.
Resistance R 17, electric capacity C 12absorb and suppress the level and smooth light of spike, electric capacity C 13coupling tube starting, resistance R 16adding direct current (DC) bias prevents fluorescent tube two from turning black.
Embodiment DC low voltage power supply 30V, twoly pushes away electric current 2.3A, and ignite 56W fluorescent tube G, and light modulation is agreeable, efficiency 81%, and illumination of turning on light round the clock, power MOS pipe temperature rise, in permissible value, increases the service life.

Claims (1)

1. a DC low voltage power supply note lock power combing fluorescent lamp, comprise DC low voltage power supply, fluorescent tube, it is characterized in that: also comprise benchmark crystal oscillator, frequency divider, model is the phase dimming chip of IR21592, push-pull amplifier, pusb pull oscilator, be added coupler, abnormal condition of lamp tube detector, wherein, benchmark crystal oscillator is by quartz-crystal resonator, two inverters and resistance capacitance composition, first inverter constrained input two ends cross-over connection resistance is biased, and difference earth electric capacity, simultaneously, the also quartz-crystal resonator of cross-over connection series connection trimmer, benchmark crystal oscillator output signal is through second inverter shaping buffering access frequency divider, phase dimming chip, chip includes voltage controlled oscillator VCO, phase discriminator, recommend amplification driving circuit, detect lamp load current phase circuit CS, phase dimming interface, lamp load exception control SD, power end V dDby resistance step-down, capacitor filtering access DC low voltage power supply, VCO external capacitor produces vibration, lamp load current phase circuit CS is detected in fluorescent tube sampling access in fluorescent tube ballast inductance, capacitor resonance point phase place, by chip internal to phase discriminator one end, light modulation direct voltage connects phase dimming interface DIM, the phase discriminator other end is accessed through phase dimming interface by chip internal voltage controlled oscillator VCO, phase discriminator exports and meets VCO through constant-current source, VCO exports to connect and recommends amplification driving circuit, drive output HO, LO connect push-pull amplifier, and power output is through transformer T 1with pusb pull oscilator output transformer T 3feed-in is added coupler power synthesis, boosting coupling fluorescent tube starter, benchmark crystal oscillator injects phase dimming chip VCO locking phase through the reference signal capacitance partial pressure of frequency divider frequency division, synthesized mutual coupling by push-pull amplifier and pusb pull oscilator and note and lock frequency pulling coherent synchronization locking phase, two high-power MOS field effect transistor Q of pusb pull oscilator being added coupler power 3, Q 4drain electrode connection transformer T 3resonant inductance L 4two ends, grid meets transformer T 2feedback inductance L 8two ends, inductance L 8central point connects the field effect transistor Q of source ground simultaneously 5drain electrode and resistance R 7, R 8one end, two high-power MOS field effect transistor Q 3, Q 4source electrode is through earth resistance R 9voltage drop, by resistance R 11current sampling and abnormal condition of lamp tube detector signal are by resistance R 12access field effect transistor Q 5grid, controls pusb pull oscilator two high-power MOS field effect transistor Q during abnormal condition of lamp tube 3, Q 4cut-off, quick failure of oscillation makes it be protected, inductance L 7series resistance R 10with transformer T 3inductance L 5closed, inductance L 4central point series inductance L 9rear access DC low voltage power supply, inductance L 9the one end be connected with DC low voltage power supply is also connected to shunt capacitance C 9, shunt capacitance C 9other end ground connection, abnormal condition of lamp tube detector signal is through resistance access phase dimming chip lamp load exception control SD, abnormal condition of lamp tube detector signal connects pusb pull oscilator fet gate through resistance, DC low voltage power supply access benchmark crystal oscillator, frequency divider, push-pull amplifier, pusb pull oscilator power end.
CN201310155872.0A 2013-04-15 2013-04-15 DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp Expired - Fee Related CN103338576B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2175660A1 (en) * 2007-08-02 2010-04-14 Sony Corporation Image processor
CN202050584U (en) * 2011-04-03 2011-11-23 阮树成 Four-bridge oscillation high-voltage sodium lamp utilizing solar power
CN203181388U (en) * 2013-04-15 2013-09-04 阮雪芬 Direct-current low-voltage power supply injection-locking power synthesis light-modulation fluorescent lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2175660A1 (en) * 2007-08-02 2010-04-14 Sony Corporation Image processor
CN202050584U (en) * 2011-04-03 2011-11-23 阮树成 Four-bridge oscillation high-voltage sodium lamp utilizing solar power
CN203181388U (en) * 2013-04-15 2013-09-04 阮雪芬 Direct-current low-voltage power supply injection-locking power synthesis light-modulation fluorescent lamp

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