CN202077255U

CN202077255U - Direct-current low-voltage power supply four-push-pull oscillation metal halogen lamp

Info

Publication number: CN202077255U
Application number: CN201120110312XU
Authority: CN
Inventors: 阮树成; 梅玉刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-03
Filing date: 2011-04-03
Publication date: 2011-12-14
Anticipated expiration: 2021-04-03

Abstract

The utility model relates to the field of the electronic technology, in particular to a direct-current low-voltage power supply four-push-pull oscillation metal halogen lamp. The direct-current low-voltage power supply four-push-pull oscillation metal halogen lamp consists of a frequency-modulation signal generator, four push-pull oscillators, three phase-adding couplers, a lamp tube circuit and an overload detecting protection circuit direct-current low-voltage power supply; a four-push-pull oscillation power synthesizes frequency modulation to inhibit 'acoustic resonance' flashing light; and an output power is accessed into the lamp tube circuit to generate high light efficiency. The direct-current low-voltage power supply four-push-pull oscillation metal halogen lamp has unique and efficient circuit and can be widely used for illumination of high-power metal halogen lamps in occasions without alternating-current mains supply or with inconvenient power supply in automobiles, trains and ships.

Description

Dc low voltage power supply four push-pull oscillator Metal halogen lamps

Technical field

The utility model relates to electronic technology field, specifically is a kind of Dc low voltage power supply four push-pull oscillator Metal halogen lamps.

Background technology

The Metal halogen lamp HID of automobile, train, the power supply of ship DC low-voltage power supply, the photoelectric conversion efficiency height can produce floodlighting, is suitable for the inside and outside illumination of car and boat, throws light on as automobile headlamp.Metal halogen lamp is that a kind of high intensity discharge is luminous, and operating voltage is at hundreds of volts, and ignition trigger voltage just can ignite more than 3KV usually.DC low-voltage power supply power supply metal halogen lamp electric core is a DC-AC inverter.Lamp load power adopts large power triode or metal-oxide-semiconductor field effect transistor push-pull oscillator mode to work when the 25W left and right sides, obtains effect preferably.But Metal halogen lamp power is all bigger, and drive current is corresponding bigger, and at this moment the power device of inverter power consumption sharply increases, because the car and boat inner space is limit the radiator volume can not do the very high meeting of big heating up and burnt out components and parts, cisco unity malfunction.In addition, Metal halogen lamp high frequency electric source power supply very easily produces " acoustic resonance " light and dodges and tremble, and the wave impulse of fluorescent tube internal pressure forms standing wave from the tube wall reflection when identical with the high-frequency current harmonic phase, and the unstable light flash of guiding discharge electric arc is dizzy to the human eye generation.

Summary of the invention

The purpose of this utility model provides the Dc low voltage power supply power supply, drags a kind of Dc low voltage power supply four push-pull oscillator Metal halogen lamps of high-power lamp load.

The utility model technical solution is: by FM signal generator, four pusb pull oscilators, three addition couplers, tube circuit, overload detection protective circuit and Dc low voltage power supply are formed, three addition couplers are divided into the first addition coupler, the second addition coupler and third phase add coupler, four pusb pull oscilators are divided into pusb pull oscilator 6a, pusb pull oscilator 6b, pusb pull oscilator 6c and pusb pull oscilator 6d, respectively by ferrimagnetism transformer T1, T2 and T3, T4 primary inductance shunt capacitance is a resonant tank, its inductance centre cap inserts Dc low voltage power supply through high frequency choke inductance and shunt capacitance, simultaneously, the FM signal generator power end inserts Dc low voltage power supply, the resonant tank two ends respectively and connect two high-power oscillating tube collector electrodes, emitter series resistance ground connection, resonant tank two ends cross-couplings also in parallel constitutes pusb pull oscilator to managing base resistance quiescent biasing and electric capacity positive feedback, two high-power oscillating tube base stages are also taken over a year detection signal mouthpiece collector electrode, the mouthpiece base stage, collector electrode connects voltage negative feedback biasing resistor, grounded emitter, pusb pull oscilator 6a and pusb pull oscilator 6b power output are respectively by ferrimagnetism transformer T1, the anti-phase access first addition coupler primary inductance single order power of T2 secondary inductance is synthetic, pusb pull oscilator 6c and pusb pull oscilator 6d power output are respectively by ferrimagnetism transformer T3, the anti-phase access second addition coupler primary inductance single order power of T4 secondary inductance is synthetic, it is synthetic that the first addition coupler and the anti-phase access third phase of the second addition coupler secondary inductance add coupler primary inductance second order power, third phase adds the coupler secondary inductance access tube circuit that boosts, FM signal generator output inserts pusb pull oscilator 6d mouthpiece, suppress light flash by oscillating tube interelectrode capacitance modulating oscillation frequency, the overload detection protective circuit through magnet ring inductance induced potential diode detection, detects voltage access interface management and control system oscillating tube by the lamp load electric current;

Wherein, FM signal generator constitutes low-frequency oscillator by integrated circuit and resistance, electric capacity, and output signal inserts pusb pull oscilator 6d FM signal mouthpiece through Darlington triode emitter following, suppresses light flash by oscillating tube interelectrode capacitance modulating oscillation frequency;

Tube circuit adds coupler secondary inductance one end ground connection at third phase, the other end inserts the tie point of pulse firing coil primary and secondary through electric capacity, this contact is in addition through the capacitances in series earth resistance, and on the contact of capacitance resistance series connection, join with bidirectional trigger diode, bidirectional trigger diode series connection pulse firing primary coil, the Metal halogen lamp pipe of pulse firing secondary coil and ground connection joins.

The utility model produces good effect: the Dc low voltage power supply four push-pull oscillator power of powering are synthetic, frequency modulation suppresses light flash, obtain the high light efficiency of high-power lamp load, capacitance-resistance cross-couplings four push-pull oscillator power are synthetic not only efficient, it is very strong to vibrate, even-order harmonic is cancelled out each other, and reduces the inverter power device power consumption, is widely used in the occasion illumination that does not have AC power or power supply inconvenience.

Description of drawings

Fig. 1 technical solutions of the utility model functional-block diagram

Fig. 2 pusb pull oscilator circuit

Fig. 3 four pushes away the synthetic and overload detection protective circuit of hunting power

Fig. 4 FM signal generator circuit

Fig. 5 tube circuit

Specific implementation method

With reference to Fig. 1; 2; 3 (Fig. 2 is an example with pusb pull oscilator 6a circuit; all the other pusb pull oscilator circuit are all identical); the utility model specific implementation method and embodiment 1: by FM signal generator 2; four pusb pull oscilators 6; three addition couplers 5; tube circuit 4; overload detection protective circuit 3 and Dc low voltage power supply are formed; three addition couplers 5 are divided into the first addition coupler 5a; the second addition coupler 5b and third phase add coupler 5c; four pusb pull oscilators 6 are divided into pusb pull oscilator 6a; pusb pull oscilator 6b and pusb pull oscilator 6c; pusb pull oscilator 6d; respectively by ferrimagnetism transformer T1; T2 and T3; T4 primary inductance L1 shunt capacitance C3 is a resonant tank; its inductance centre cap inserts Dc low voltage power supply 1 through high frequency choke inductance L 2 and shunt capacitance C4; simultaneously; FM signal generator 2 power ends insert Dc low voltage power supply 1; the resonant tank two ends respectively and meet two high-power oscillating tube Q1; the Q2 collector electrode; emitter series resistance R3; R6 ground connection; resonant tank two ends cross-couplings also in parallel is to managing base resistance R1; R2 quiescent biasing and capacitor C 1; the C2 positive feedback constitutes pusb pull oscilator; Q1; the Q2 base stage also meets control signal mouthpiece Q3; the Q4 collector electrode; mouthpiece Q3; the Q4 base stage; collector electrode meets voltage negative feedback biasing resistor R4; R5; grounded emitter; pusb pull oscilator 6a and pusb pull oscilator 6b power output are respectively by ferrimagnetism transformer T1; the anti-phase access first addition coupler 5a primary inductance single order power of T2 secondary inductance is synthetic; pusb pull oscilator 6c and pusb pull oscilator 6d power output are respectively by ferrimagnetism transformer T3; the anti-phase access second addition coupler 5b primary inductance single order power of T4 secondary inductance is synthetic; it is synthetic that the first addition coupler 5a and the anti-phase access third phase of the second addition coupler 5b secondary inductance add coupler 5c primary inductance second order power; third phase adds coupler 5c secondary inductance and boosts and insert tube circuit 4; FM signal generator 2 outputs insert pusb pull oscilator 6d mouthpiece, by oscillating tube Q1; Q2 interelectrode capacitance modulating oscillation frequency suppresses light flash.

Through the 3 induced potential diode VD3 detections of magnet ring inductance L, capacitor C 6, resistance R 11 filtering voltages are through resistance R 8, R9 access interface pipe Q3, Q4 control oscillating tube Q1, Q2 by the lamp load electric current for overload detection protective circuit 3.When fluorescent tube loose contact or lamp load short circuit produce big electric current, overload detection voltage makes Q3, Q4 saturation conduction, and oscillating tube Q1, Q2 play protection immediately by failure of oscillation.Diode VD1, VD2 protection oscillating tube is avoided high back-pressure and is punctured.

Capacitance-resistance cross-couplings pusb pull oscilator is actual to be to export the LC frequency-selecting dual-stage amplifier of directly linking input, two high-power oscillating tube Q1, Q2 be in turn saturated with end, with zero quiescent current half period conducting, it is very strong to vibrate, the above odd harmonic in opposite three rank of collector current phase place is zero, not only efficient, and have even-order harmonic and cancel out each other, reduce inverter power device heat power consumption, for this reason, lower be suppressed at the feedback of resonant inductance centre cap and connect power supply and seal in high frequency choke inductance and shunt capacitance, be output as pure sine wave.

General large power triode constitutes the push-pull oscillator power output, fluorescent tube about coupling 30W, require bigger power output, when for example mating the 120W lamp load, only several the direct parallel operations of device can not be satisfactory, adopt four push-pull oscillator power synthetic effects obvious, the power output stack can be satisfied specification requirement, it is synthetic to push away the mutual anti-phase exciting power of vibration power output with four respectively by two addition couplers, again the conversion of two addition coupler output currents being doubled summation, to deliver to the 3rd addition coupler power synthetic, and the high-power fluorescent tube that ignites of boosting is luminous.When three balance resistance R12, R13 and R14 equate at two synthetic electric currents of power, no power waste.

Fig. 4, FM signal generator integrated circuit (IC) 1 adopts LM567, produce the 260HZ low-frequency square-wave through 8 chargings of 15 pairs of capacitor C of resistance R, by resistance R 16, R17 and capacitor C 9 integrations is that triangular wave is through the impedance conversion of Darlington triode Q5 emitter-base bandgap grading, connect pusb pull oscilator 6b mouthpiece Q3, Q4 in resistance R 18, by oscillating tube Q1, Q2 interelectrode capacitance modulating oscillation frequency, the centre frequency that makes low frequency signal center on the reference signal locking constantly changes, lamp electric arc can't form the standing wave resonance point, avoids Metal halogen lamp " acoustic resonance " color break-up.Capacitor C 7 bypass over the ground.

Fig. 5, tube circuit 4 adds the synthetic high pressure of coupler 5c power and makes bidirectional trigger diode VD4 conducting through capacitor C 10, C11, resistance R 19, R20 at turn on light moment third phase of startup, electric current is through the elementary L4 of pulse firing coil, the inductive secondary L5 generation high-voltage pulse that boosts, igniting triggers Metal halogen lamp G gas breakdown conducting, and the fluorescent tube startup is ignited luminous.

Embodiment Dc low voltage power supply voltage 30V, four push-pull oscillator frequency 56KHZ, low frequency signal 260HZ, frequency modulation deviation range 2.2KHZ, power output coupling 100W Metal halogen lamp, inversion efficiency 83%, the temperature rise of oscillating tube radiator is below 30 ℃.

Claims

1. Dc low voltage power supply four push-pull oscillator Metal halogen lamps; it is characterized in that: by FM signal generator; four pusb pull oscilators; three addition couplers; tube circuit; overload detection protective circuit and Dc low voltage power supply are formed; three addition couplers are divided into the first addition coupler; the second addition coupler and third phase add coupler; four pusb pull oscilators are divided into pusb pull oscilator (6a); pusb pull oscilator (6b) and pusb pull oscilator (6c); pusb pull oscilator (6d); respectively by ferrimagnetism transformer (T1); (T2) and (T3); (T4) the primary inductance shunt capacitance is a resonant tank; its inductance centre cap inserts Dc low voltage power supply through high frequency choke inductance and shunt capacitance; simultaneously; the FM signal generator power end inserts Dc low voltage power supply; the resonant tank two ends respectively and connect two high-power oscillating tube collector electrodes; emitter series resistance ground connection; resonant tank two ends cross-couplings also in parallel constitutes pusb pull oscilator to managing base resistance quiescent biasing and electric capacity positive feedback; two high-power oscillating tube base stages also connect control signal mouthpiece collector electrode; the mouthpiece base stage; collector electrode connects voltage negative feedback biasing resistor; grounded emitter; pusb pull oscilator (6a) and pusb pull oscilator (6b) power output are respectively by ferrimagnetism transformer (T1); (T2) the anti-phase access first addition coupler primary inductance single order power of secondary inductance is synthetic; pusb pull oscilator (6c) and pusb pull oscilator (6d) power output are respectively by ferrimagnetism transformer (T3); (T4) the anti-phase access second addition coupler primary inductance single order power of secondary inductance is synthetic; it is synthetic that the first addition coupler and the anti-phase access third phase of the second addition coupler secondary inductance add coupler primary inductance second order power; third phase adds the coupler secondary inductance access tube circuit that boosts; the FM signal generator output signal inserts pusb pull oscilator (6d) mouthpiece; suppress light flash by oscillating tube interelectrode capacitance modulating oscillation frequency; the overload detection protective circuit through magnet ring inductance induced potential diode detection, detects voltage access interface management and control system oscillating tube by the lamp load electric current.

2. Dc low voltage power supply four push-pull oscillator Metal halogen lamps according to claim 1, it is characterized in that: FM signal generator constitutes low-frequency oscillator by integrated circuit and resistance, electric capacity, output signal inserts pusb pull oscilator (6d) mouthpiece through Darlington triode emitter following, suppresses light flash by oscillating tube interelectrode capacitance modulating oscillation frequency.

3. Dc low voltage power supply four push-pull oscillator Metal halogen lamps according to claim 1, it is characterized in that: tube circuit adds coupler secondary inductance one end ground connection at third phase, the other end inserts the tie point of pulse firing coil primary and secondary through electric capacity, this contact is in addition through the capacitances in series earth resistance, and on the contact of capacitance resistance series connection, join with bidirectional trigger diode, bidirectional trigger diode series connection pulse firing primary coil, the Metal halogen lamp pipe of pulse firing secondary coil and ground connection joins.