CN201975999U

CN201975999U - Electronic transformer with eight push-pull oscillators for DC low-voltage power supply

Info

Publication number: CN201975999U
Application number: CN2011201105996U
Authority: CN
Inventors: 阮小青; 阮树成
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-03
Filing date: 2011-04-03
Publication date: 2011-09-14
Anticipated expiration: 2021-04-03

Abstract

The utility model relates to the field of electronic technology, in particular to an electronic transformer with eight push-pull oscillators for a DC low-voltage power supply. The electronic transformer consists of the eight push-pull oscillators, seven additive couplers, a high-power MOS (metal oxide semiconductor) field-effect transistor full-wave rectification circuit, an overload detection protective circuit and a DC low-voltage power supply, wherein the power of the eight push-pull oscillators are synthesized and accessed into the high-power MOS field-effect transistor full-wave rectification circuit for outputting DC voltage to a load. The electronic transformer provided by the utility model has unique circuit and high efficiency, can be widely used for automobiles, trains and ships where AC commercial power is not available, or occasions where power supply is inconvenient, and is suitable for driving high-power LED array lamps for lighting, landscape and advertisements or driving other DC electrical equipment.

Description

Dc low voltage power supply eight push-pull oscillator electronic transformers

Technical field

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

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, adopting Dc low voltage power supply LED light emitting diode matrix lamp can produce bright light penetrates, the photoelectric conversion efficiency height, light is soft pleasant, easy to use, long service life is widely used in view and advertisement.Yet, it is big to drive large-power light-emitting diodes led array lamp inverter current, require vibration output high-power, electric current just must increase when operating voltage was low, and therefore, big current oscillation triode power consumption temperature rise causes that the pipe electric current and voltage changes, heavy current warming also makes coil magnetic permeability decline inductance value reduce simultaneously, serious generation saturation inductors becomes very little, and then influences light tube electric voltage and electric current change, lamp luminescence brightness instability.Very easily burn out device.

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 eight push-pull oscillator electronic transformers of high power load.

The utility model technical solution is: by eight pusb pull oscilators, seven addition couplers, high-power MOS field effect transistor full-wave rectifying circuit, overload detection protective circuit and Dc low voltage power supply are formed, seven addition couplers are divided into the first addition coupler, the second addition coupler, third phase adds coupler, the 4th addition coupler, the 5th addition coupler, the 6th addition coupler, the 7th addition coupler, eight pusb pull oscilators are divided into pusb pull oscilator 5a, pusb pull oscilator 5b, pusb pull oscilator 5c, pusb pull oscilator 5d and pusb pull oscilator 5e, pusb pull oscilator 5f, pusb pull oscilator 5g, pusb pull oscilator 5h, respectively by eight ferrimagnetism transformer T1, T2, T3, T4 and T5, T6, T7, T8 primary inductance shunt capacitance is a resonant tank, the primary inductance centre cap inserts Dc low voltage power supply through high frequency choke inductance and shunt capacitance, 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 is to pipe base resistance quiescent biasing and electric capacity positive feedback are constituted pusb pull oscilator, 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 5a and pusb pull oscilator 5b power output are 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 5c and pusb pull oscilator 5d power output are by ferrimagnetism transformer T3, the anti-phase access second addition coupler primary inductance single order power of T4 secondary inductance is synthetic, pusb pull oscilator 5e and pusb pull oscilator 5f power output are by ferrimagnetism transformer T5, it is synthetic that the anti-phase access third phase of T6 secondary inductance adds coupler primary inductance single order power, pusb pull oscilator 5g and pusb pull oscilator 5h power output are by ferrimagnetism transformer T7, anti-phase access the 4th addition coupler primary inductance single order power of T8 secondary inductance is synthetic, anti-phase access the 5th addition coupler primary inductance second order power of the first addition coupler and the second addition coupler secondary inductance is synthetic, third phase adds coupler and anti-phase access the 6th addition coupler primary inductance second order power of the 4th addition coupler secondary inductance is synthetic, anti-phase access the 7th addition coupler primary inductance of the 5th addition coupler and the 6th addition coupler secondary inductance three rank power are synthetic, secondary inductance inserts high-power MOS field effect transistor full-wave rectifying circuit output dc voltage for load, the overload detection protective circuit penetrates magnet ring by high-power MOS field effect transistor full-wave rectifying circuit load current bus, magnetic ring coil induced potential diode detection access interface management and control system oscillating tube;

Wherein, high-power MOS field effect transistor full-wave rectifying circuit is made of two high-power MOS field effect transistor, switching diode and resistance, two high-power MOS field effect transistor source electrodes connect the two ends of the 7th addition coupler secondary inductance respectively, the 7th addition coupler secondary inductance centre cap ground connection, two high-power MOS field effect transistor gate bias resistance are connected on grid, leak two ends, grid is by the two ends of switching diode parallel resistance intersection access the 7th addition coupler secondary inductance, and two pipe drain electrodes also are connected into the full-wave rectification output dc voltage for load.

The utility model produces good effect: the synthetic high light efficiency of high-power lamp load that obtains of eight pusb pull oscilator three rank power of Dc low voltage power supply power supply, the directly continuous LC frequency-selecting dual-stage amplifier of capacitance-resistance cross-couplings push-pull oscillator output input, it is very strong to vibrate, and eight push away the output of hunting power synthesizing efficient.Not only efficient, even-order harmonic is cancelled out each other, and reduces the inverter power device power consumption, the full-wave rectification of high-power MOS field effect transistor is without electrochemical capacitor, the internal resistance low-response is fast, is widely used in the occasion CD-CD conversion, driving LED light-emitting diode battle array or other dc electric apparatus that do not have electric main 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 eight pushes away the synthetic and overload detection protective circuit circuit of hunting power.

Fig. 4 high-power MOS field effect transistor full-wave rectifying circuit.

Embodiment

With reference to Fig. 1; 2; 3 (Fig. 2 is an example with pusb pull oscilator 5a circuit; all the other pusb pull oscilator circuit are identical); the utility model specific implementation method and embodiment: by eight pusb pull oscilators 5; seven addition couplers 4; high-power MOS field effect transistor full-wave rectifying circuit 3 and overload detection protective circuit 2 are formed; seven addition couplers 4 are divided into the first addition coupler 4a; the second addition coupler 4b; third phase adds coupler 4c; the 4th addition coupler 4d; the 5th addition coupler 4e; the 6th addition coupler 4f; the 7th addition coupler 4g; eight pusb pull oscilators 5 are divided into pusb pull oscilator 5a; pusb pull oscilator 5b; pusb pull oscilator 5c; pusb pull oscilator 5d and pusb pull oscilator 5e; pusb pull oscilator 5f; pusb pull oscilator 5g; pusb pull oscilator 5h; respectively by eight ferrimagnetism transformer T1; T2; T3; T4 and T5; T6; T7; T8 primary inductance L1 shunt capacitance C3 is a resonant tank; primary inductance L1 centre cap inserts Dc low voltage power supply 1 through 2 high frequency choke inductance L 2 and shunt capacitance C4; 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 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; base stage; collector electrode meets voltage negative feedback biasing resistor R4; R5; grounded emitter; pusb pull oscilator 5a and pusb pull oscilator 5b power output are by ferrimagnetism transformer T1; the anti-phase access first addition coupler 4a primary inductance single order power of T2 secondary inductance is synthetic; pusb pull oscilator 5c and pusb pull oscilator 5d power output are by ferrimagnetism transformer T3; the anti-phase access second addition coupler 4b primary inductance single order power of T4 secondary inductance is synthetic; pusb pull oscilator 5e and pusb pull oscilator 5f power output are by ferrimagnetism transformer T5; it is synthetic that the anti-phase access third phase of T6 secondary inductance adds coupler 4c primary inductance single order power; pusb pull oscilator 5g and pusb pull oscilator 5h power output are by ferrimagnetism transformer T7; anti-phase access the 4th addition coupler 4d primary inductance single order power of T8 secondary inductance is synthetic; anti-phase access the 5th addition coupler 4e primary inductance second order power of the first addition coupler 4a and the second addition coupler 4b secondary inductance is synthetic; third phase adds coupler 4c and anti-phase access the 6th addition coupler 4f primary inductance second order power of the 4th addition coupler 4d secondary inductance is synthetic; anti-phase access the 7th addition coupler 4g primary inductance of the 5th addition coupler 4e and the 6th addition coupler 4f secondary inductance three rank power are synthetic, and secondary inductance inserts high-power MOS field effect transistor full-wave rectifying circuit 3 output dc voltage supply loads.

Overload detection protective circuit 2 penetrates magnet ring by high-power MOS field effect transistor full-wave rectifying circuit load current bus; load current is through magnetic ring coil L3 induced potential diode VD3 detection; detect voltage and control oscillating tube Q1, Q through filter capacitor C5 resistance R 18 and current-limiting resistance R7, R8 access interface pipe Q3, Q4; when load short circuits or loose contact produce big electric current; overload detection voltage makes Q3, Q4 saturation conduction; Q1, Q2 play protection by failure of oscillation.Diode VD1, VD2 prevent that high back-pressure from puncturing oscillating tube.

Capacitance-resistance cross-couplings pusb pull oscilator is actual to be to export the LC frequency-selecting dual-stage amplifier of directly linking input, it is very strong to vibrate, two high-power oscillating tube Q1, Q2 be in turn saturated with end, with zero quiescent current half period conducting, 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 inverter power device heat power consumption, for this reason, lowlyer be suppressed at resonant inductance centre cap feedback 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 load about push-pull oscillator power output coupling 30W, when requiring more heavy load power, when for example mating the 200W load, only several the direct parallel operations of device can not be satisfactory, adopt eight push-pull oscillator power synthetic effects remarkable, its 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 eight respectively by seven addition couplers.When balance resistance R11, R12, R13, R14, R15 and R16, R17 equate at two synthetic electric currents of power, no power waste.

Fig. 4, high-power MOS field effect transistor full-wave rectifying circuit, by two high-power MOS field effect transistor Q5, Q6 full-wave rectification, source electrode inserts the two ends of the 7th addition coupler 4g secondary inductance respectively, inductance centre cap ground connection, grid inserts the two ends of addition coupler 4g secondary inductance through switching diode VD4, VD5 parallel resistance R20, R22 intersection, and constitute gate bias with resistance R 19, R21, drain electrode also is connected into full-wave rectification output dc voltage supply load RL, rectification circuit is without electrochemical capacitor filtering, and the internal resistance low-response is fast.This electronic transformer output dc voltage, power by eight push away vibration and the primary and secondary inductance ratio of addition coupler and supply voltage, electric current is determined.Be suitable for driving large-power light-emitting diodes led array lamp and drive other dc electric apparatus.

Embodiment Dc low voltage power supply voltage 28V, eight push-pull oscillator operating current 8A, frequency of oscillation 47KHZ, output voltage 12V, electric current 15A, coupling 200W LED array lamp, inversion efficiency 82%, the temperature rise of oscillating tube radiator is lower than 30 ℃.

Claims

1. Dc low voltage power supply eight push-pull oscillator electronic transformers; it is characterized in that: by eight pusb pull oscilators; seven addition couplers; high-power MOS field effect transistor full-wave rectifying circuit; overload detection protective circuit and Dc low voltage power supply are formed; seven addition couplers are divided into the first addition coupler; the second addition coupler; third phase adds coupler; the 4th addition coupler; the 5th addition coupler; the 6th addition coupler; the 7th addition coupler; eight pusb pull oscilators are divided into pusb pull oscilator (5a); pusb pull oscilator (5b); pusb pull oscilator (5c); pusb pull oscilator (5d) and pusb pull oscilator (5e); pusb pull oscilator (5f); pusb pull oscilator (5g); pusb pull oscilator (5h); respectively by eight ferrimagnetism transformers (T1); (T2); (T3); (T4) and (T5); (T6); (T7); (T8) the primary inductance shunt capacitance is a resonant tank; the primary inductance centre cap inserts Dc low voltage power supply through high frequency choke inductance and shunt capacitance; 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 is to pipe base resistance quiescent biasing and electric capacity positive feedback are constituted pusb pull oscilator; 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 (5a) and pusb pull oscilator (5b) power output are 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 (5c) and pusb pull oscilator (5d) power output are by ferrimagnetism transformer (T3); (T4) the anti-phase access second addition coupler primary inductance single order power of secondary inductance is synthetic; pusb pull oscilator (5e) and pusb pull oscilator (5f) power output are by ferrimagnetism transformer (T5); (T6) it is synthetic that the anti-phase access third phase of secondary inductance adds coupler primary inductance single order power; pusb pull oscilator (5g) and pusb pull oscilator (5h) power output are by ferrimagnetism transformer (T7); (T8) anti-phase access the 4th addition coupler primary inductance single order power of secondary inductance is synthetic; anti-phase access the 5th addition coupler primary inductance second order power of the first addition coupler and the second addition coupler secondary inductance is synthetic; third phase adds coupler and anti-phase access the 6th addition coupler primary inductance second order power of the 4th addition coupler secondary inductance is synthetic; anti-phase access the 7th addition coupler primary inductance of the 5th addition coupler and the 6th addition coupler secondary inductance three rank power are synthetic; secondary inductance inserts high-power MOS field effect transistor full-wave rectifying circuit output dc voltage for load; the overload detection protective circuit penetrates magnet ring by high-power MOS field effect transistor full-wave rectifying circuit load current bus, magnetic ring coil induced potential diode detection access interface management and control system oscillating tube.

2. Dc low voltage power supply eight push-pull oscillator electronic transformers according to claim 1, it is characterized in that: high-power MOS field effect transistor full-wave rectifying circuit is by two high-power MOS field effect transistor, switching diode and resistance constitute, two high-power MOS field effect transistor source electrodes connect the two ends of the 7th addition coupler secondary inductance respectively, the 7th addition coupler secondary inductance centre cap ground connection, two high-power MOS field effect transistor gate bias resistance are connected on grid, leak two ends, grid is by the two ends of switching diode parallel resistance intersection access the 7th addition coupler secondary inductance, and two pipe drain electrodes also are connected into the full-wave rectification output dc voltage for load.