CN201957316U

CN201957316U - High-pressure sodium lamp with direct-current low-voltage power supply and double push -pull oscillators

Info

Publication number: CN201957316U
Application number: CN2011201101656U
Authority: CN
Inventors: 阮树成
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-03
Filing date: 2011-04-03
Publication date: 2011-08-31
Anticipated expiration: 2021-04-03

Abstract

The utility model relates to the field of electronic techniques, in particular to a high-pressure sodium lamp with a direct-current low-voltage power supply and double push-pull oscillators. The high-pressure sodium lamp comprises a frequency module generator, two push-pull oscillators, phase adding coupler, a lamp tube circuit, an overload detection and protection circuit, a power supply decoupling filter and the direct-current low-voltage power supply. The power of the double push-pull oscillators is combined, frequency is modulated to suppress acoustic-resonance lamp light flash and output power is input to the lamp tube circuit to generate high-efficiency light. The high-pressure sodium lamp has the advantage of unique and high-efficiency circuit and can be widely used for high-pressure sodium lamp illumination in places such as automobiles, trains and ships which have no alternating-current mains supply or to which power is inconvenient to supply.

Description

Dc low voltage power supply double push-pull vibration high-pressure sodium lamp

Technical field

The utility model relates to electronic technology field, specifically is a kind of Dc low voltage power supply double push-pull vibration high-pressure sodium lamp.

Background technology

The high-pressure sodium 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.High-pressure sodium 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 high voltage sodium lamp electronic 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 high-pressure sodium 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, high-pressure sodium lamp high frequency electric source power supply very easily produces " acoustic resonance " light flash, 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 double push-pull vibration high-pressure sodium lamp of high-power lamp load.

The utility model technical solution is: by FM signal generator, pusb pull oscilator 6a, pusb pull oscilator 6b, the addition coupler, tube circuit, the overload detection protective circuit, power supply decoupling filter and Dc low voltage power supply are formed, pusb pull oscilator 6a and pusb pull oscilator 6b are respectively by ferrimagnetism transformer T1, T2 primary inductance shunt capacitance is a resonant tank, its inductance centre cap inserts Dc low voltage power supply through power supply decoupling filter high frequency choke inductance and shunt capacitance, simultaneously, the FM signal generator power end inserts Dc low voltage power supply through the power supply decoupling filter, 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 pipe 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, the FM signal generator output signal inserts pusb pull oscilator 6a, pusb pull oscilator 6b mouthpiece, suppress light flash by oscillating tube interelectrode capacitance modulating oscillation frequency, pusb pull oscilator 6a and pusb pull oscilator 6b power output are synthetic by ferrimagnetism transformer T1 and the anti-phase access addition of T2 secondary inductance coupler primary inductance power respectively, addition coupler secondary inductance power is synthetic, the access tube circuit boosts, 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 astatic multivibrator and active band-pass filter by operational amplifier A 1, A2 and resistance, electric capacity, the A1 biasing resistor is identical with the feedback resistance value, the capacitor charge and discharge time is identical, constitute the astatic multivibrator of symmetry upset, A2 constitutes the negative feedback active band-pass filter by resistance, the single T frequency-selective network of electric capacity RC, the A1 output signal inserts pusb pull oscilator 6a, pusb pull oscilator 6b mouthpiece through the active bandpass filtering of A2, suppresses light flash by oscillating tube interelectrode capacitance modulating oscillation frequency;

Tube circuit inserts addition coupler secondary inductance through the capacitance series fluorescent tube, and connect the bidirectional triode thyristor anode through current-limiting resistance, charging connects bidirectional trigger diode triggering bidirectional triode thyristor gate pole to electric capacity by resistance in addition, bidirectional triode thyristor anode and negative electrode are attempted by the pulse firing transformer of connecting with discharge capacity, the pulse firing secondary coil connects fluorescent tube, and elementary, the secondary tie point of bidirectional triode thyristor negative electrode, charging capacitor and pulse firing coil inserts addition coupler secondary inductance earth terminal.

The utility model produces good effect: Dc low voltage power supply power supply double push-pull hunting power is synthetic, frequency modulation suppresses light flash, obtain the high light efficiency of high-power lamp load, capacitance-resistance cross-couplings double push-pull vibration is 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

The two synthetic and overload detection protective circuits of hunting power that push away of Fig. 2

Fig. 3 FM signal generator

Fig. 4 tube circuit

Specific implementation method

With reference to Fig. 1; 2 (Fig. 2 is an example with pusb pull oscilator 6a circuit; pusb pull oscilator 6b circuit is identical); the utility model specific implementation method and embodiment: by FM signal generator 2; double push-pull oscillator 6; addition coupler 5; tube circuit 4; overload detection protective circuit 3; power supply decoupling filter and Dc low voltage power supply 1 are formed; double push-pull oscillator 6 is divided into pusb pull oscilator 6a and pusb pull oscilator 6b; respectively by ferrimagnetism transformer T1; T2 primary inductance L0 shunt capacitance C4 is a resonant tank; its inductance centre cap inserts Dc low voltage power supply 1 through power supply decoupling filter high frequency choke inductance L 2 and shunt capacitance C6; simultaneously; FM signal generator 2 power ends insert Dc low voltage power supply 1 through the power supply decoupling filter; pusb pull oscilator 6a and pusb pull oscilator 6b resonant tank two ends are 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 arrives pipe base resistance R1; R2 quiescent biasing and capacitor C 1; the C2 positive feedback constitutes pusb pull oscilator; two high-power oscillating tube 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; FM signal generator 2 output signals insert pusb pull oscilator 6a; pusb pull oscilator 6b mouthpiece Q3; Q4; by oscillating tube Q1; Q2 interelectrode capacitance modulating oscillation frequency suppresses light flash; pusb pull oscilator 6a and pusb pull oscilator 6b power output are synthetic by ferrimagnetism transformer T1 and the anti-phase access addition of T2 secondary inductance coupler 5 primary inductance power respectively, and addition coupler 5 secondary inductance power are synthetic; boost and insert tube circuit 4.

Overload detection protective circuit 3 by the lamp load electric current through the 1 induced potential diode VD3 detection of magnet ring inductance L; detect voltage through capacitor C 3 filtering; resistance R 8, R9 access interface pipe Q3, Q4 control oscillating tube Q1, Q2; when fluorescent tube loose contact or lamp load short circuit produce big electric current; detect voltage and make Q3, Q4 saturation conduction; oscillating tube Q1, Q2 shield 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, opposite three rank of collector current phase place and high-order odd harmonic are zero, not only efficient, and have even-order harmonic and cancel out each other, reduce the inverter power device power consumption, lowlyer be suppressed at resonant inductance centre cap feedback and connect power supply and seal in high frequency choke inductance and shunt capacitance, make lamp load be output as pure sine wave.

General large power triode constitutes push-pull oscillator power output coupling 25W left and right sides fluorescent tube, when requiring more high-power output for example to mate the 50W lamp load, only several the direct parallel operations of device can not be satisfactory, the synthetic stack of double push-pull hunting power power output effect is remarkable, to two push away the mutual anti-phase excitation of vibration power output by addition coupler 5, two output current conversion double summation and deliver to lamp load, balance resistance R11 no power waste when two electric currents equate.

Fig. 3, FM signal generator is a multivibrator by operational amplifier A 1, biasing resistor R12, R13 and negative feedback R14, the R15 value is identical, capacitor C 7 is filled, discharge time is identical, the output symmetrical square wave, through operational amplifier A 2 and resistance R 16, R17, R18 and capacitor C 8, C9 forms the single T frequency-selective network of negative feedback RC active band-pass filter filtering high order harmonic component, the sinusoidal wave pusb pull oscilator 6a that inserts of output low frequency, pusb pull oscilator 6d mouthpiece Q3, Q4, by oscillating tube Q1, Q2 interelectrode capacitance modulating oscillation frequency, low-frequency sine constantly changes around the oscillation center frequency, lamp electric arc can't form the standing wave resonance point, avoids " acoustic resonance " light flash.

Fig. 4, tube circuit is at moment addition coupler 5 secondary inductance high pressure that startup is turned on light, make bidirectional trigger diode VD4 conducting by capacitor C 10,11 chargings of 19 pairs of capacitor C of resistance R, and then triggering bidirectional triode thyristor VS1 gate pole makes its conducting, electric current is through current-limiting resistance R20, discharge capacity C12 and pulse firing primary coil L4, sense secondary coil L5 and boost into high-voltage pulse, igniting triggers high-pressure sodium lamp G gas breakdown conducting, makes the high-pressure sodium lamp startup ignite luminous.

Present embodiment dc low-voltage voltage 24V, double push-pull oscillator 65KHZ, low frequency signal 150HZ, frequency modulation deviation range 2.5KHZ suppresses light flash, and output mesh power 60W high-pressure sodium fluorescent tube twoly pushes away the temperature rise of oscillating tube radiator and is limited in below 30 ℃, inversion efficiency 83%, light is stable not to be dodged.

Claims

1. Dc low voltage power supply double push-pull vibration high-pressure sodium lamp; it is characterized in that: by FM signal generator; pusb pull oscilator (6a); pusb pull oscilator (6b); the addition coupler; tube circuit; the overload detection protective circuit; power supply decoupling filter and Dc low voltage power supply are formed; pusb pull oscilator (6a) and pusb pull oscilator (6b) are respectively by ferrimagnetism transformer (T1); (T2) the primary inductance shunt capacitance is a resonant tank; its inductance centre cap inserts Dc low voltage power supply through power supply decoupling filter high frequency choke inductance and shunt capacitance; simultaneously; the FM signal generator power end inserts Dc low voltage power supply through the power supply decoupling filter; 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 pipe 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; FM signal generator output inserts pusb pull oscilator (6a); pusb pull oscilator (6b) mouthpiece; suppress light flash by oscillating tube interelectrode capacitance modulating oscillation frequency; the anti-phase access addition of secondary inductance coupler primary inductance power is synthetic by ferrimagnetism transformer (T1) with (T2) respectively with pusb pull oscilator (6b) power output for pusb pull oscilator (6a); addition coupler secondary inductance power is synthetic; the access tube circuit boosts; 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 double push-pull vibration high-pressure sodium lamp according to claim 1, it is characterized in that: FM signal generator is by operational amplifier A 1, A2 and resistance, electric capacity constitutes astatic multivibrator and active band-pass filter, the A1 biasing resistor is identical with the feedback resistance value, the capacitor charge and discharge time is identical, constitute the astatic multivibrator of symmetry upset, A2 is by resistance, the single T frequency-selective network of electric capacity RC constitutes the negative feedback active band-pass filter, the A1 output signal inserts pusb pull oscilator (6a) through the active bandpass filtering of A2, pusb pull oscilator (6b) mouthpiece suppresses light flash by oscillating tube interelectrode capacitance modulating oscillation frequency.

3. Dc low voltage power supply double push-pull vibration high-pressure sodium lamp according to claim 1, it is characterized in that: tube circuit inserts addition coupler secondary inductance through the capacitance series fluorescent tube, and connect the bidirectional triode thyristor anode through current-limiting resistance, charging connects bidirectional trigger diode triggering bidirectional triode thyristor gate pole to electric capacity by resistance in addition, bidirectional triode thyristor anode and negative electrode are attempted by the pulse firing transformer of connecting with discharge capacity, the pulse firing secondary coil connects fluorescent tube, the bidirectional triode thyristor negative electrode, charging capacitor and pulse firing coil are elementary, secondary tie point inserts addition coupler secondary inductance earth terminal.