CN202068640U

CN202068640U - Double bridge oscillation power synthesis fluorescent lamp with direct current low voltage power supply

Info

Publication number: CN202068640U
Application number: CN2011201013551U
Authority: CN
Inventors: 张根清; 阮树成
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-03
Filing date: 2011-04-03
Publication date: 2011-12-07
Anticipated expiration: 2021-04-03

Abstract

The utility model relates to the electronic technical field, and relates to a double bridge oscillation power synthesis fluorescent lamp with a direct current low voltage power supply. The double bridge oscillation power synthesis fluorescent lamp with the direct current low voltage power supply consists of two bridge type injection locked oscillators, a summation coupler, a lamp tube circuit, an overload detection protective circuit and the direct current low voltage power supply, wherein after power synthesis, the two bridge type injection locked oscillators are connected with the lamp tube circuit so that high photosynthetic efficiency is generated and when a lamp tube is short-circuit or has a bad contact, the lamp tube is protected by the overload detection protective circuit immediately. The bridge type oscillation fluorescent lamp has specific and high efficient circuits and can be extensively applied to cars, trains and boats and other places without alternating current electric supply or convenient power supply for high power fluorescent lamp illumination.

Description

Dc low voltage power supply doube bridge hunting power is synthesized fluorescent lamp

Technical field

The utility model relates to electronic technology field, specifically is the synthetic fluorescent lamp of a kind of Dc low voltage power supply doube bridge hunting power.

Background technology

Can supply or the open-air inconvenient occasion of leisure power supply of encamping at automobile, train and not have electric main of ship, adopt the fluorescent lamp of storage battery Dc low voltage power supply can produce stronger illumination brightness, photoelectric conversion efficiency is higher, and light is soft pleasant, and is easy to use.Yet fluorescent lamp is that a kind of gas discharge produces light, and ignition trigger voltage just can excite tube wall fluorescent coating mercury to steam usually more than 500V, and the back stable operating voltage that ignites is 40V-110V, and lamp current is at least at hundreds of milliamperes.And, require the vibration power output big, electric current just must increase when operating voltage was low, therefore, big current oscillation triode power consumption temperature rise causes that the pipe electric current and voltage changes, and heavy current warming also makes coil magnetic permeability decline inductance value reduce simultaneously, and serious generation saturation inductors becomes very little, and then influence light tube electric voltage and electric current and change lamp luminescence brightness instability.Even burn out device.Along with lamp load power requirement when bigger, the corresponding increase of drive current, the power device of inverter power consumption sharply increases, and usually, the generator triode radiator can not be done too much, the restriction operate as normal.

Summary of the invention

The purpose of this utility model provides the Dc low voltage power supply power supply, drags the synthetic fluorescent lamp of a kind of Dc low voltage power supply doube bridge hunting power of high-power lamp load.

The utility model technical solution is: by two bridge-type oscillators, the addition coupler, tube circuit, overload detection protective circuit and Dc low voltage power supply are formed, two bridge-type oscillators are divided into bridge-type oscillator 5a and bridge-type oscillator 5b, respectively by ferrimagnetism transformer T1, T2 primary inductance shunt capacitance is a resonant tank, the resonant tank two ends respectively and connect two high-power oscillating tube collector electrodes of PNP and two high-power oscillating tube collector electrodes of NPN, two high-power oscillating tube emitters of PNP connect the Dc low voltage power supply positive pole, two high-power oscillating tube grounded emitters of NPN, complementary series feed power supply, fast recovery diode in parallel between four high-power oscillating tube collector electrodes and the emitter, resonant tank two ends cross-couplings also in parallel is to pipe base resistance quiescent biasing and electric capacity positive feedback are constituted bridge-type oscillator, two high-power oscillating tube base stages of NPN also connect control signal mouthpiece collector electrode, the mouthpiece base stage, collector electrode connects voltage negative feedback biasing resistor, grounded emitter, bridge-type oscillator 5a and bridge-type oscillator 5b power output are synthetic by ferrimagnetism transformer T1 and the anti-phase access addition of T2 secondary inductance coupler secondary inductance power respectively, the addition coupler secondary inductance access tube circuit that boosts, the overload detection protective circuit through magnet ring inductance induced potential diode peak detection, detects voltage access interface management and control system oscillating tube by the lamp load electric current;

Wherein, tube circuit connects addition coupler secondary inductance, at the inductance two ends and connect the capacitance-resistance RC element of series connection, connect fluorescent tube series resonant circuit inductance, electric capacity a end then, thermistor and bidirectional trigger diode that the filament other end also connects pipeline start up by preheating electric capacity and is connected in series to tube filament.

The utility model produces useful good effect: Dc low voltage power supply power supply doube bridge hunting power is synthetic, obtain the high light efficiency of high-power lamp load, capacitance-resistance cross-couplings doube bridge hunting power is synthetic not only efficient, the complementary series feed power supply of oscillating circuit, the high electric current of supply voltage is little, significantly reduces power consumption and increases power output.Opposite three rank of collector current phase place and high-order odd harmonic are zero, and even-order harmonic is cancelled out each other, and is output as pure sine wave, are 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 bridge-type oscillator circuit

Synthetic and the overload detection protective circuit of Fig. 3 doube bridge oscillator power

Fig. 4 tube circuit

Specific implementation method

With reference to Fig. 1; 2; 3 (Fig. 2 is an example with bridge-type oscillator 5a circuit; bridge-type oscillator 5b circuit is identical); the utility model specific implementation method and embodiment: by two bridge-type oscillators 5; addition coupler 4; tube circuit 3; overload detection protective circuit 2 and Dc low voltage power supply are formed; two bridge-type oscillators 5 are divided into bridge-type oscillator 5a and bridge-type oscillator 5b; respectively by ferrimagnetism transformer T1; T2 primary inductance L1 shunt capacitance C0 is a resonant tank; the resonant tank two ends respectively and meet two high-power oscillating tube Q1 of PNP; Q2 collector electrode and two high-power oscillating tube Q3 of NPN; the Q4 collector electrode; two high-power oscillating tube Q1 of PNP; the Q2 emitter connects Dc low voltage power supply 1 positive pole; two high-power oscillating tube Q3 of NPN; the Q4 grounded emitter; complementary series feed power supply; four high-power oscillating tube Q1; Q2 and Q3; fast recovery diode VD1 in parallel between Q4 collector electrode and the emitter; VD2 and VD3; VD4; resonant tank two ends cross-couplings also in parallel arrives pipe base resistance R1; R2 and R3; R4 quiescent biasing and capacitor C 1; C2 and C3; the C4 positive feedback constitutes bridge-type oscillator; two high-power oscillating tube Q3 of NPN; the Q4 base stage also meets control signal mouthpiece Q5; the Q6 collector electrode; mouthpiece Q5; the Q6 base stage; collector electrode meets voltage negative feedback biasing resistor R5; R6; grounded emitter; bridge-type oscillator 5a and bridge-type oscillator 5b power output are synthetic by ferrimagnetism transformer T1 and the anti-phase access addition of T2 secondary inductance L2 coupler 4 primary inductance power respectively; addition coupler 4 secondary inductance are boosted and are inserted tube circuit 3; overload detection protective circuit 2 by the lamp load electric current through magnet ring inductance L 3 induced potential diode VD5 peak detections; detect voltage through capacitor C 6 filtering; current-limiting resistance R7; R8 access interface pipe Q5; Q6 control oscillating tube Q3; Q4 and Q1; Q2; when lamp load short circuit or fluorescent tube loose contact produce big electric current; detect voltage and make Q3; the Q4 saturation conduction; oscillating tube Q3; Q4 and Q1; Q2 shields immediately by failure of oscillation.

Fast recovery diode VD1, VD2 and VD3, VD4 protection oscillating tube are avoided high back-pressure and are punctured.

Bridge-type oscillator PNP, the push-pull oscillator of two symmetrical capacitance-resistance cross-couplings of complementation of NPN triode intercouples and forms, the push-pull oscillator of capacitance-resistance cross-couplings is actual to be the two-stage LC frequency selective amplifier that the output input directly links to each other, high-power oscillating tube Q1, Q2 and Q3, the Q4 angle of flow is 90 degree alternations, output current is half cosine wave pulse, it is very strong to vibrate, through resonant tank decay harmonic wave, opposite three rank of collector current phase place and high-order odd harmonic are zero, even-order harmonic is cancelled out each other, and makes lamp load be output as pure sine wave, and is not only efficient, complementary series feed power supply, the supply voltage height, electric current is little, significantly reduces power consumption and increases power output.

Fig. 3, general large power triode constitutes the bridge vibration, fluorescent tube about power output coupling 60W, when requiring more high-power output for example to mate the 120W lamp load, only several the direct parallel operations of device can not be satisfactory, and the synthetic stack of doube bridge hunting power power output effect is remarkable, by addition coupler 4 with the doube bridge mutual anti-phase excitation of power output of vibrating, two output current conversion double summation and deliver to lamp load, balance resistance R11 no power waste when two electric currents equate.

Fig. 4, tube circuit are two tubes and connect, and synthesize the output high pressure and connect the pulse of Resistor-Capacitor Unit R1, C1 absorption negative peak at addition coupler 4 power, suppress the level and smooth lamplight brightness of noise radiation.Fluorescent tube series resonant circuit L1, C2 and L2, C4 are connected to fluorescent tube G1, G2, resonance frequency is the highest near doube bridge frequency of oscillation fluorescent tube light efficiency, fluorescent tube also meets startup capacitor C 3, C5 and thermistor RT1, RT2 series connection bidirectional trigger diode VD1, VD2, the very high bidirectional trigger diode conducting of light tube electric voltage during starter, electric current through thermistor to the filament preheating of switching on, lamp starter back light tube voltage reduces two-way trigger tube to be ended, and makes it not have the consumption preheating.

Present embodiment Dc low voltage power supply voltage 60V, doube bridge oscillator frequency 76KHZ, two power 56W fluorescent tubes of output coupling, inversion efficiency 85%, oscillating tube radiator temperature are limited in and are lower than 40 ℃.

Claims

1. a Dc low voltage power supply doube bridge hunting power is synthesized fluorescent lamp; it is characterized in that: by two bridge-type oscillators; the addition coupler; tube circuit; overload detection protective circuit and Dc low voltage power supply are formed; two bridge-type oscillators are divided into bridge-type oscillator (5a) and bridge-type oscillator (5b); respectively by ferrimagnetism transformer (T1); (T2) the primary inductance shunt capacitance is a resonant tank; the resonant tank two ends respectively and connect two high-power oscillating tube collector electrodes of PNP and two high-power oscillating tube collector electrodes of NPN; two high-power oscillating tube emitters of PNP connect the Dc low voltage power supply positive pole; two high-power oscillating tube grounded emitters of NPN; complementary series feed power supply; fast recovery diode in parallel between four high-power oscillating tube collector electrodes and the emitter; resonant tank two ends cross-couplings also in parallel is to pipe base resistance quiescent biasing and electric capacity positive feedback are constituted bridge-type oscillator; two high-power oscillating tube base stages of NPN also connect control signal mouthpiece collector electrode; the mouthpiece base stage; collector electrode connects voltage negative feedback biasing resistor; grounded emitter; the anti-phase access addition of secondary inductance coupler primary inductance power is synthetic by ferrimagnetism transformer (T1) with (T2) respectively with bridge-type oscillator (5b) power output for bridge-type oscillator (5a); the addition coupler secondary inductance access tube circuit that boosts; the overload detection protective circuit through magnet ring inductance induced potential diode peak detection, detects voltage access interface management and control system oscillating tube by the lamp load electric current.

2. Dc low voltage power supply doube bridge hunting power according to claim 1 is synthesized fluorescent lamp, it is characterized in that: tube circuit connects addition coupler secondary inductance, at the inductance two ends and connect the capacitance-resistance RC element of series connection, connect fluorescent tube series resonant circuit inductance, electric capacity a end then, thermistor and bidirectional trigger diode that the filament other end also connects pipeline start up by preheating electric capacity and is connected in series to tube filament.