CN203181392U - Direct-current low-voltage power supply four-push injection-locking power synthesis fluorescent lamp group - Google Patents

Abstract

The utility model relates to the electric light source technical field and specifically discloses a direct-current low-voltage power supply four-push injection-locking power synthesis fluorescent lamp group. A self-sustained oscillation chip A push-pull inverter A' output power transformer T1 and a self-sustained oscillation chip B push-pull inverter B' output power transformer T2 are fed into an addition coupler TB1. A self-sustained oscillation chip C push-pull inverter C' output power transformer T3 and a self-sustained oscillation chip D push-pull inverter D' output power transformer T4 are fed into an addition coupler TB2. The addition coupler TB1 and the addition coupler TB2 are fed into an addition coupler TB3 for power synthesis. The synthesized power further undergoes a voltage boost and is then fed into a lamp tube circuit for turning a fluorescent tube group on. Signals of a reference crystal oscillator are injected into four self-sustained oscillation chips through a frequency divider for phase locking and output power stabilizing. An excessive temperature rise of devices is prevented. Imbalanced oscillation frequency change power is also prevented. Light rays are further prevented from deteriorating. Signals of a lamp tube abnormal current detector are accessed to SD ends of the four self-sustained oscillation chips for power tube protection. The fluorescent lamp group is suitably used in fluorescent lamp illumination occasions where direct-current low-voltage power sources are supplied.

Description

Dc low voltage power supply four is injected the synthetic fluorescent lamp group of lock power

Technical field

The utility model relates to the electric source lighting technical field, specifically is that a kind of Dc low voltage power supply four is injected the synthetic fluorescent lamp group of lock power.

Background technology

Prior art usually with LC or RC oscillator as fluorescent lamp group electric light source, it is stable inadequately that the frequency of oscillation of generation is subjected to the temperature change stability difference to influence power, causes light intensity to descend, though simple in structure, cost is low.But obtain high-power illumination and certainly will increase device current, especially dc low-voltage power supply, increase power output and can only rely on the electric current acting, the too high frequency of oscillation that causes of hunting power pipe power consumption sharp increase temperature rise changes, and the result can make light unbalance with the frequency change power magnitude.Simultaneously, big electric current descends by the high magnetic permeability of coil temperature rise, the little impedance trend zero of saturation inductors quantitative change, 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 descends, and is heavy then burn out device reduction of service life.

Summary of the invention

The purpose of this utility model provides Dc low voltage power supply power supply, and vibrate a kind of Dc low voltage power supply four of high frequency stabilization Phase synchronization high-power illumination of inversion is injected the synthetic fluorescent lamp group of lock power.

The utility model technical solution is: comprise Dc low voltage power supply, fluorescent tube group, benchmark crystal oscillator, frequency divider, self-oscillation chip A, self-oscillation chip B, self-oscillation chip C, self-oscillation chip D, recommend inverter A ', recommend inverter B ', recommend inverter C ', recommend inverter D ', addition coupler TB ₁, addition coupler TB ₂, addition coupler TB ₃Tube circuit, the abnormal condition of lamp tube current detector, wherein, the benchmark crystal oscillator is by quartz-crystal resonator, six inverters and resistance, electric capacity is formed, by an inverter input and output two ends cross-over connection biasing resistor, and connect ground capacity, simultaneously, the quartz-crystal resonator of cross-over connection series connection trimmer, insert benchmark crystal oscillator signal by another inverter, through frequency divider and connect four inverters, the self-oscillation chip includes oscillator, recommend inverse changing driving circuit, lamp failure closing controller SD, output is recommended inverter A ' through recommending the inverse changing driving circuit connection by two high-power MOS field effect transistor formations respectively, recommend inverter B ', recommend inverter C ', recommend inverter D ', self-oscillation chip A recommends inverter A ' output power transformer T ₁Recommend inverter B ' output power transformer T with self-oscillation chip B ₂Feed-in addition coupler TB ₁, self-oscillation chip C recommends inverter C ' output power transformer T ₃Recommend inverter D ' output power transformer T with self-oscillation chip D ₄Feed-in addition coupler TB ₂, addition coupler TB ₁With addition coupler TB ₂Feed-in addition coupler TB ₃Power synthesizes, boosting connects tube circuit coupling fluorescent tube group starter, and benchmark crystal oscillator signal injects four self-oscillation chip C respectively through four inverters _TEnd locking phase, abnormal condition of lamp tube current detector signal insert four self-oscillation chip SD end protection inverter power tube, Dc low voltage power supply insert benchmark crystal oscillator, frequency divider, four self-oscillation chips, four recommend the inverter power supply end;

Wherein, tube circuit is by fluorescent tube DG _1～nOne end is through resonant inductance LB _1～n, capacitor C B _1～nInsert addition coupler TB ₃Inductance TB3L ₂, the other end passes lamp current and detects mutual inductance magnet ring ground connection, and lamp tube ends also meets coupling starting capacitor CU _1～n, inductance L S ₁Meet diode VD ₁Detection, capacitor C ₈, resistance R ₁₃Filtering is through resistance R ₈, R ₉Dividing potential drop, field effect transistor Q3 trigger four self-oscillation chip lamp failure protection control end SD, and failure of oscillation turn-offs and recommends the inverter power metal-oxide-semiconductor field effect transistor fast;

The utility model produces good effect: solving dc low-voltage power supply four, to push away the inversion high frequency stabilization Phase synchronization power that vibrates synthetic, reach single self-oscillation chip and recommend the high-power illumination that inversion is difficult to obtain, avoid device temperature rise frequency of oscillation to change power imbalances, improve the lamp lighting quality, steady light increases the service life, and saves the light fixture expense.

Description of drawings

Fig. 1 technical solutions of the utility model theory diagram

Fig. 2 benchmark crystal oscillating circuit

Fig. 3 self-oscillation push-pull inverter circuit

Fig. 4 Dc low voltage power supply four is injected the synthetic fluorescent lamp group circuit of lock power

Embodiment

(it is example that Fig. 3 recommends inverter A ' circuit with self-oscillation chip A with reference to Fig. 1,2,3,4, remaining circuit is identical), the utility model embodiment and embodiment: comprise Dc low voltage power supply 12, fluorescent tube group 9, benchmark crystal oscillator 11, frequency divider 10, self-oscillation chip A1, self-oscillation chip B2, self-oscillation chip C3, self-oscillation chip D4, recommend inverter A ', recommend inverter B ', recommend inverter C ', recommend inverter D ', addition coupler TB ₁5, addition coupler TB ₂6, addition coupler TB ₃7, tube circuit 8, abnormal condition of lamp tube current detector 13, wherein, benchmark crystal oscillator 11 is made up of quartz-crystal resonator JT, six inverters and resistance, electric capacity, by an inverter ic _1-1Input and output two ends cross-over connection biasing resistor R ₁, and meet ground capacity C ₁, C ₂, simultaneously, cross-over connection series connection trimming capacitor C ₀Quartz-crystal resonator JT, by another inverter ic _1-2Insert benchmark crystal oscillator 11 signals, through frequency divider 10 frequency division ÷ N and connect four inverter ics _1-3, IC _1-4, IC _1-5, IC _1-6, the self-oscillation chip IC ₃IR2156 includes oscillator, recommends inverse changing driving circuit, lamp failure closing controller SD, and output connects by two high-power MOS field effect transistor Q through recommending inverse changing driving circuit respectively ₁, Q ₂Formation is recommended inverter A ', recommends inverter B ', recommends inverter C ', is recommended inverter D ', and self-oscillation chip A1 recommends inverter A ' output power transformer T ₁Recommend inverter B ' output power transformer T with self-oscillation chip B2 ₂Feed-in addition coupler TB ₁5, self-oscillation chip C3 recommends inverter C ' output power transformer T ₃Recommend inverter D ' output power transformer T with self-oscillation chip D4 ₄Feed-in addition coupler TB ₂6, addition coupler TB ₁5 with addition coupler TB ₂6 feed-in addition coupler TB ₃7 power synthesize, boosting connects tube circuit 8 coupling fluorescent tube groups 9 starters, inserts the frequency divider 10 of benchmark crystal oscillator 11 signals and four inverter output signal f that connect _0-1, f _0-2, f _0-3, f _0-4Inject the C of four self-oscillation chip A1, B2, C3, D4 _TThe end locking phase, abnormal condition of lamp tube current detector 13 signals connect the SD end of four self-oscillation chip A1, B2, C3, D4, fast failure of oscillation turn-offs and recommends the inverter power metal-oxide-semiconductor field effect transistor, and Dc low voltage power supply 12 inserts benchmark crystal oscillators 11, frequency divider 10, four self-oscillation chip A1, B2, C3, D4 and four and recommends inverter A ', B ', C ', D ' power end.

IC ₃Pin mark function: V _CCPower end, C _TMeet oscillator timing capacitor C ₄, R _TMeet oscillator timing resistor R ₂, HO drives Q ₁, LO drives Q ₂, the CS current detecting, the SD lamp failure is closed vibration protection control, COM ground connection.

The self-oscillation chip IC ₃By resistance R ₇Step-down, capacitor C ₇Filtering supply power end V _CCProduce vibration, drive through HO, LO and recommend inverter, high-power MOS tube Q ₁, Q ₂In turn conducting, by half cycle, transformer T ₁Mid point is through inductance L F ₁Capacitor C ₆Decoupling filtering meets Dc low voltage power supply+V.By transformer T ₁Power output is through the synthetic feed-in lamp load of second order addition coupler power.

Addition coupler TB ₁, TB ₂Recommend power output stack, addition coupler TB with two respectively ₃Recommend power output two overlapping of order summations with four and deliver to lamp load, four to recommend inverter input voltage, frequency, phase place and load identical, equalizing resistance R ₁₀, R ₁₁, R ₁₂No power consumption.Do not have power output when certain inverter breaks down, the corresponding circuits equalizing resistance absorbs the pairing inverter power, though whole lamp power reduces but still can keep illumination, improves reliability.

The synthetic large-power lamp that drags of power, dilatation flexibly, reliably still, requires self-oscillation chip oscillate voltage-phase unanimity, and is unbalanced to eliminate non-linear intermodulation power, obtains stable power output.For this reason, introduce injection phase-locking and solve power synthesis phase simultaneous techniques.Injection phase-locking is need not be voltage-controlled tuning, phase discriminator, loop filter, and circuit structure is simple, superior performance, and fringe cost is low.Injection phase-locking there is not difference with looped phase locking in essence, and it is synchronous to be suitable for the synthetic large-power lamp stable oscillation stationary vibration frequency plot of power, and stable power output is avoided the too high power imbalances of device temperature rise, and steady light increases the service life.

Benchmark crystal oscillator quartz resonator quality factor height, frequency is subjected to variations in temperature minimum, and it is highly stable that to make benchmark accurate.Reference signal is injected self-oscillation chip C through frequency division _TThe end locking phase.Do not inject reference signal self-oscillation chip RC oscillator and produce free oscillation frequency, it is synthetic to inject reference signal RC oscillating voltage and its vector, by self-oscillation chip additive mixing locking phase, oscillator signal and injection reference signal only have a fixing phase difference.Synchronization bandwidth and injecting power direct ratio, with RC oscillator loaded Q inverse ratio, because reference signal is injected the input of RC oscillator, gain is high, the small-power locking.

Be the integral multiple of locking frequency of oscillation owing to inject reference frequency, or frequency of oscillation is the integral multiple of reference frequency, the reference signal frequency division injects the high wen-frequency characteristics quartz resonator of apolegamy upper frequency, is easy to lock tens of to hundreds of kilo hertzs of LC or RC oscillator.Frequency divider IC ₂Binary system or decimal system counting frequency division.

The lamp abnormality detection is by lamp current mutual inductance magnet ring inductance L S ₁Induced potential diode VD ₁Detection, capacitor C ₈, resistance R ₁₃Filtering is by SD ' resistance R ₈, R ₉Dividing potential drop, field effect transistor Q3 triggers self-oscillation chip SD end, and when the trigger voltage high level signal, failure of oscillation turn-offs fast and recommends the inverter power pipe rapidly, in order to avoid impaired.The unusual power tube large-current electric resistance of lamp R ₆Pressure drop is through resistance R ₄, capacitor C ₅Open the self-oscillation chip current and detect CS end duplicate protection inverter power tube.

Embodiment Dc low voltage power supply 36V, four recommend inverter current 6A, drive 5 36W fluorescent lamp group pipe DG _1～n, efficient 83%, inverter current is little, and device power consumption is low, need not the device radiation device, long-time houselights is stable.Be applicable to the fluorescent lighting occasion of dc low-voltage power supply.

Claims (2)

1. a Dc low voltage power supply four is injected the synthetic fluorescent lamp group of lock power, comprise Dc low voltage power supply, fluorescent tube group, it is characterized in that: also comprise benchmark crystal oscillator, frequency divider, self-oscillation chip A, self-oscillation chip B, self-oscillation chip C, self-oscillation chip D, recommend inverter A ', recommend inverter B ', recommend inverter C ', recommend inverter D ', addition coupler TB ₁, addition coupler TB ₂, addition coupler TB ₃Tube circuit, the abnormal condition of lamp tube current detector, wherein, the benchmark crystal oscillator is by quartz-crystal resonator, six inverters and resistance, electric capacity is formed, by an inverter input and output two ends cross-over connection biasing resistor, and connect ground capacity, simultaneously, the quartz-crystal resonator of cross-over connection series connection trimmer, insert benchmark crystal oscillator signal by another inverter, through frequency divider and connect four inverters, the self-oscillation chip includes oscillator, recommend inverse changing driving circuit, lamp failure closing controller SD, output is recommended inverter A ' through recommending the inverse changing driving circuit connection by two high-power MOS field effect transistor formations respectively, recommend inverter B ', recommend inverter C ', recommend inverter D ', self-oscillation chip A recommends inverter A ' output power transformer T ₁Recommend inverter B ' output power transformer T with self-oscillation chip B ₂Feed-in addition coupler TB ₁, self-oscillation chip C recommends inverter C ' output power transformer T ₃Recommend inverter D ' output power transformer T with self-oscillation chip D ₄Feed-in addition coupler TB ₂, addition coupler TB ₁With addition coupler TB ₂Feed-in addition coupler TB ₃Power synthesizes, boosting connects tube circuit coupling fluorescent tube group starter, and benchmark crystal oscillator signal injects four self-oscillation chip C respectively through four inverters _TEnd locking phase, abnormal condition of lamp tube current detector signal insert four self-oscillation chip SD end protection inverter power tube, and Dc low voltage power supply inserts benchmark crystal oscillator, frequency divider, four self-oscillation chips, four power ends of recommending inverter.

2. Dc low voltage power supply four according to claim 1 is injected the synthetic fluorescent lamp group of lock power, and it is characterized in that: tube circuit is by fluorescent tube DG _1～nOne end is through resonant inductance LB _1～n, capacitor C B _1～nInsert addition coupler TB ₃Inductance TB3L ₂, the other end passes lamp current and detects mutual inductance magnet ring ground connection, and lamp tube ends also meets coupling starting capacitor CU _1～n, inductance L S ₁Meet diode VD ₁Detection, capacitor C ₈, resistance R ₁₃Filtering is through resistance R ₈, R ₉Dividing potential drop, field effect transistor Q ₃Trigger two self-oscillation chip lamp failure protection control end SD, failure of oscillation turn-offs and recommends the inverter power metal-oxide-semiconductor field effect transistor fast.

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