CN202076931U

CN202076931U - Non-electrolysis long-life stable-voltage constant current driving power supply

Info

Publication number: CN202076931U
Application number: CN2011201353591U
Authority: CN
Inventors: 蔡吉堂; 杜洪生
Original assignee: FUSHUN NEW HONGSHENG LIGHTING ELECTRONIC Co Ltd
Current assignee: FUSHUN NEW HONGSHENG LIGHTING ELECTRONIC Co Ltd
Priority date: 2011-05-03
Filing date: 2011-05-03
Publication date: 2011-12-14
Anticipated expiration: 2021-05-03

Abstract

The utility model relates to a non-electrolysis long-life stable-voltage constant current driving power supply. Binding posts N and L of commercial power are connected with a rectifier bridge circuit, a filtering capacitor C1, a reactance coil L1, a resistor R1 and a resistor R2 are arranged between an output end of the rectifier bridge circuit and a power factor correction circuit, an output end of the L1 is connected with a first pin of a high-frequency transformer, a resistor R3, a resistor R5 and a VMOS tube V1 are arranged between the power factor correction circuit and a first and a second pin of the T1, a diode D2 and a capacitor C2 are arranged between a fifth and a sixth pin of the T1 and an electronic filter circuit, the electronic filter circuit and a constant current driver circuit are parallelly connected at two ends of the C2, an input end of a voltage stabilizing control circuit is arranged between the electronic filter circuit and the constant current driver circuit, and an output end of the voltage stabilizing control circuit is connected with the power factor correction circuit. The design enables that the driving power supply better matches with usage of a load, and service life of the driving power supply is increased.

Description

A kind of no electrolysis long-life pressure-stabilizing constant flow driving power

Technical field

The utility model relates to a kind of no electrolysis long-life pressure-stabilizing constant flow driving power, particularly a kind of a kind of driving power that adopts circuit of power factor correction, electronic filter circuit and pressure-stabilizing constant flow control circuit.

Background technology

Owing to the application of electrochemical capacitor in the existing Switching Power Supply, had a strong impact on the useful life of Switching Power Supply.The life-span of general electrochemical capacitor is 6000-8000 hour.Phenomenons such as special usually have the electrochemical capacitor explosion at the higher environment of serviceability temperature, and electrolyte is dry make electrochemical capacitor scrap inefficacy in advance.

Such as: employing ordinary tap power supply or constant pressure and flow driving power that the LED electricity-saving lamp that occurs on the market now, major part all adopt the resistance-capacitance depressurization power supply, also have.This LED electricity-saving lamp is in use usually because the heating of power supply self and LED lamp pearl, and the inner electrolyte of electrochemical capacitor is dry and the LED electricity-saving lamp is damaged in the power supply, has shortened the useful life of LED electricity-saving lamp.Use in the past few years proves that general LED electricity-saving lamp also just can use 1-2 years, seldom can use 2-3 years.

In the global design of LED electricity-saving lamp, generally all be that producer designs LED luminous component (aluminium base) and shell voluntarily, power supply mostly adopts the way of outsourcing to solve.This just exists factors such as LED driving power and LED luminous plaque coupling is unreasonable, makes that the LED electricity-saving lamp that occurs on the market is multifarious, various in style, and the life-span differs.And the LED lamp pearl of introducing to the market is also uneven, and better can reaching uses 25000 hours light decays afterwards between 35% to 55%, and the life-span of supporting with it LED power supply is also all in 10,000 hours; And the lamp pearl life-span reach 50000 hours, light decay is between 25% to 35%, the power supply that matches is few, does not have to reach 30000 hours substantially.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of no electrolysis long-life pressure-stabilizing constant flow driving power, and this no electrolysis long-life pressure-stabilizing constant flow driving power is simple in structure, and prolongs the useful life of power supply.

For overcoming the above problems, concrete technical scheme of the present utility model is as follows: a kind of no electrolysis long-life pressure-stabilizing constant flow driving power, the binding post N that connects civil power links to each other with the input side that exchanges of rectifier circuit with binding post L, the direct current outlet side of rectifier circuit is connected in parallel to filter capacitor C1, the output cathode end of rectifier circuit connects reactance coil L1, the dc output end of reactance coil L1 is connected in series and links to each other with the output negative pole of rectifier circuit after resistance R 1 and the resistance R 2 again, the anodal pin of input that is connected circuit of power factor correction at the tie point of resistance R 1 and resistance R 2, the power cathode of circuit of power factor correction connects the output negative pole end of rectifier circuit, the output cathode of circuit of power factor correction connects resistance R 3, the other end of resistance R 3 connects the dc output end of reactance coil L1, the current sample end of circuit of power factor correction connects the source electrode of resistance R 5 and VMOS pipe V1, the other end of resistance R 5 links to each other with the 4th pin of the output negative pole of rectifier circuit and high frequency transformer T1, the grid of VMOS pipe V1 also is connected with circuit of power factor correction, the drain electrode of VMOS pipe V1 links to each other with second pin of high frequency transformer T1, first pin of high frequency transformer T1 connects the dc output end of reactance coil L1, after the 5th pin of high frequency transformer T1 connects diode D2, again with the 6th pin capacitor C 2 that is connected in parallel, electronic filter circuit and constant-flow driver circuit also are connected in parallel at the two ends of capacitor C 2, the input that connects controlling circuit of voltage regulation between electronic filter circuit and constant-flow driver circuit, its output connect the output cathode and the input negative pole of circuit of power factor correction.

Described circuit of power factor correction is: the 3rd pin chip IC 1(26) is the input positive pole of circuit of power factor correction, the 6th pin is the input negative pole, the 8th pin is an output cathode, the 4th pin is an output negative pole, and the 7th pin is connected the back and links to each other with the grid of VMOS pipe V1 with resistance R 4.

The structure of described electronic filter circuit is: resistance R 9 is connected in series back and resistance R 8 T1 level of the high frequency transformer direct current outlet sides that are attempted by in parallel with capacitor C 3; The tie point of resistance R 9 and capacitor C 3 is connected to the base stage of triode V2, and its collector electrode links to each other with the other end of resistance R 9; Capacitor C 4 is attempted by emitter and T1 level of the high frequency transformer output negative pole of triode V2.

The present invention adopts circuit of power factor correction in design, improves switching frequency, and its purpose is intended to remove the electrochemical capacitor of high direct voltage side; Adopting electronic filter is in order to remove the electrochemical capacitor of secondary output, so that substitute electrochemical capacitor with electrodeless electric capacity; Adopting constant-current driving is in order to satisfy the requirement of relevant load to constant current work, to improve the long-life design of driving power.The purpose of doing like this is exactly that the use of driving power and load is complementary more, increases the service life.

Description of drawings

Fig. 1 is no electrolysis long-life pressure-stabilizing constant flow driving power block diagram.

Fig. 2 is no electrolysis long-life pressure-stabilizing constant flow driving power figure.

Embodiment

As shown in Figure 1, a kind of no electrolysis long-life pressure-stabilizing constant flow driving power, meet the binding post N(7 of civil power) with binding post L(8) link to each other with the input side that exchanges of rectifier circuit (1), the direct current outlet side of rectifier circuit (1) is connected in parallel to filter capacitor C1(9), the output cathode end of rectifier circuit (1) connects reactance coil L1(10), reactance coil L1(10) the dc output end resistance R 1(11 that is connected in series) with resistance R 2(12) after link to each other with the output negative pole of rectifier circuit (1) again, resistance R 1(11) with resistance R 2(12) tie point be connected the anodal pin of input of circuit of power factor correction (2), play effect to voltage sample.The power cathode of circuit of power factor correction (2) connects the output negative pole end of rectifier circuit (1), the output cathode of circuit of power factor correction (2) connects resistance R 3(13), resistance R 3(13) the other end connects reactance coil L1(10) dc output end, resistance R 3(13) play the startup effect.The current sample end of circuit of power factor correction (2) connects resistance R 5(15) and VMOS manage V1(16) source electrode, operating current is sampled.The output negative pole and high frequency transformer T1(17 of other end resistance R 5(15) and rectifier circuit (1)) the 4th pin link to each other, VMOS manages V1(16) grid also be connected with circuit of power factor correction (2), VMOS manages V1(16) drain electrode and high frequency transformer T1(17) second pin link to each other, high frequency transformer T1(17) dc output end first pin connection reactance coil L1(10), high frequency transformer T1(17) the 5th pin connects diode D2(18) after, again with the 6th pin capacitor C 2(19 that is connected in parallel), at capacitor C 2(19) the two ends electronic filter circuit (3) that also is connected in parallel, electronic filter circuit (3) is the active electronic filter, and its effect is to reduce filter capacitor numerical value and dc ripple coefficient.Constant-flow driver circuit (4) is a constant current control chip IC2(33) model is AMP2861, constant-flow driver circuit (4) connects the input of controlling circuit of voltage regulation (5), and controlling circuit of voltage regulation (5) output connects the output cathode and the input negative pole of circuit of power factor correction (2).

As shown in Figure 2, soft switch drive power supply of no electrolysis long-life as claimed in claim 1, circuit of power factor correction (2) is: chip IC 1(26) model is that its 3rd pin of L6561-6591 is the input positive pole of circuit of power factor correction (2), the 6th pin is the input negative pole, the 8th pin chip power supply positive pole, the 4th pin is an output negative pole, the 7th pin and resistance R 4(20) be connected the back and manage V1(16 with VMOS) grid link to each other.

As shown in Figure 2, the structure of described electronic filter circuit (3) is: resistance R 9(22) with capacitor C 3(23) be connected in series back and resistance R 8(21) the high frequency transformer T1(17 that is attempted by in parallel) secondary direct current outlet side; Resistance R 9(22) with capacitor C 3(23) tie point be connected to triode V2(24) base stage, its collector electrode and resistance R 9(22) the other end link to each other; Capacitor C 4(25) be attempted by emitter and the high frequency transformer T1(17 of triode V2) secondary output negative pole.This electronic filter circuit (3) is finished elementary power filter effect.

Its operation principle is: civil power is through terminal N(7) and terminal L(8), protective tube FU1(30), negative tempperature coefficient thermistor NTC1(31) connect and rectifier bridge BD1(32), at the ac input end of rectifier bridge BD1 and meet a piezo-resistance RV1(33) form rectifier circuit (1), impact to avoid transient overvoltage.At rectifier bridge BD1(32) dc output end and connect with filter capacitor C1(9), in order to the alternating component in the filter out power.Rectifier bridge BD1(32) direct-flow positive pole end is through reactance inductance coil L1(10), high frequency transformer T1(17) elementary winding L 1 and VMOS pipe V1(16) drain electrode be connected, VMOS manages V1(16) source electrode through resistance R 5(15) connect and rectifier bridge BD1(32) and negative pole end.VMOS manages V1(16) grid through resistance R 4(20) connect and chip IC 1(26) and signal output part the 7th pin, feeder ear the 8th pin of chip IC 1 is through starting resistance R3(13) connect and reactance inductance L 1(10) with the elementary tie point of high frequency transformer on.Rectifier bridge BD1(32) main flow high pressure is through resistance R 1, resistance R 2(11,12) connect and chip IC 1(26 after the dividing potential drop) voltage detecting end the 3rd pin, VMOS manages V1(16) source electrode and chip IC 1(26) current sample end the 4th pin be connected.

During work, through starting resistance R3(13) to chip IC 1(26) starting resistor is provided, make chip IC 1 get electric work.Chip IC 1(26) after the work, its pulse signal is through coupling resistance R4(20) promotion VMOS pipe V1(16) make circuit enter operating state, secondary winding L2 and the 3rd pin by high frequency transformer generates alternating voltage then, through diode D(14) give chip IC 1(26 after the rectification again) operating voltage is provided.Chip IC 1(26) coherent signal of sending here through voltage detecting and current detecting end, carry out computing by the multiplier of inside after, make voltage and electric current keep basic synchronization, control also improves the power factor and the conversion efficiency of power supply.

The output L3 of high frequency transformer is through diode D2(18) filtering, electronic filter triode V2(24), the constant current voltage that constant-current controller (4) output is stable.Filter capacitor C2(19) connect and diode D2(18) direct current output two ends after the rectification, and and meet dummy resistance R8(21).Resistance R 9(22) with capacitor C 3(23) be attempted by resistance R 8 two ends after connecting.Resistance R 9(22) with capacitor C 3(23) the electricity that is connected connect and triode V2(24) base stage, capacitor C 4 one terminates on the emitter of triode V2, the other end is connected on the output negative pole, finishes electronic filter circuit.Triode V2(24) base stage is because capacitor C 3(23) filter action, voltage is more stable, therefore by triode V2(24) voltage of emitter output is also more stable.The capacity of capacitor C 3 is 1/ β (β is the multiplication factor of triode) of original circuit filtering capacitance values.Therefore reached the purpose that replaces electrochemical capacitor with electrodeless electric capacity very easily with this circuit.Constant current control chip IC2(33) it is connected to capacitor C 4 two ends, resistance R 14(34) one terminate on the output cathode, the other end is connected on constant current control chip IC2(33) on, resistance R 14(34) size of resistance, determined the size of continuous current.

Controlling circuit of voltage regulation (5) is a photoelectrical coupler, and model is generally PC817.The link of it and electronic filter circuit (3) is the voltage sample end, and when output voltage raise, its inner light-emitting diode luminance increased, and causes the phototriode internal resistance of optocoupler inside to diminish.Controlling circuit of voltage regulation (5) is connected with circuit of power factor correction (2) again, circuit of power factor correction (2) feedback voltage can raise when the phototriode internal resistance of optocoupler inside diminishes, and then reduced pulse duration, reduced output voltage, otherwise the phototriode internal resistance of optocoupler inside can reduce circuit of power factor correction (2) feedback voltage when increasing, and then having increased pulse duration, the output voltage that raise has reached the purpose of regulated output voltage.The circuit numbers of optocoupler is U1.Entire circuit has been finished voltage stabilizing, and constant current must act on.Because cancelled electrochemical capacitor, avoided reducing the influence in Switching Power Supply life-span because of electrochemical capacitor loses efficacy, prolonged the useful life of Switching Power Supply.

Claims

1. A non-electrolytic long-life regulated constant-current drive power supply, characterized in that: the terminal N (7) and the terminal L (8) connected to the mains are connected to the AC input side of the rectifier bridge circuit (1), rectifying The DC output side of the bridge circuit (1) is connected in parallel with a filter capacitor C1 (9), the output positive terminal of the rectifier bridge circuit (1) is connected to a reactance coil L1 (10), and the DC output terminal of the reactance coil L1 (10) is connected in series to a resistor R1 (11) and resistor R2 (12) are then connected to the negative output of the rectifier bridge circuit (1), and the positive input of the power factor correction circuit (2) is connected to the connection point of the resistor R1 (11) and the resistor R2 (12) Pin, the negative pole of the power supply of the power factor correction circuit (2) is connected to the negative output terminal of the rectifier bridge circuit (1), the positive pole of the output of the power factor correction circuit (2) is connected to the resistor R3 (13), and the other end of the resistor R3 (13) Connect the DC output end of the reactance coil L1 (10), connect the current sampling end of the power factor correction circuit (2) to the source of the resistor R5 (15) and the VMOS transistor V1 (16), and connect the other end of the resistor R5 (15) to the rectifier The negative output of the bridge circuit (1) is connected to the fourth pin of the high-frequency transformer T1 (17), the gate of the VMOS transistor V1 (16) is also connected to the power factor correction circuit (2), and the gate of the VMOS transistor V1 (16) The drain is connected to the second pin of the high-frequency transformer T1 (17), the first pin of the high-frequency transformer T1 (17) is connected to the DC output terminal of the reactance coil L1 (10), and the first pin of the high-frequency transformer T1 (17) After the fifth pin is connected to the diode D2 (18), the capacitor C2 (19) is connected in parallel with the sixth pin, and the electronic filter circuit (3) and the constant current driver circuit ( 4), connect the input terminal of the voltage stabilization control circuit (5) between the electronic filter circuit (3) and the constant current driver circuit (4), and connect the output terminal of the power factor correction circuit (2) to the output positive pole and input negative pole .

2. The non-electrolytic long-life regulated constant-current driving power supply according to claim 1, characterized in that the power factor correction circuit (2) is: the third pin of the chip IC1 (26) is a power factor correction circuit (2) The input positive pole, the sixth pin is the input negative pole, the eighth pin is the output positive pole, the fourth pin is the output negative pole, the seventh pin is connected with the resistor R4 (20) and connected with the VMOS tube V1 (16) connected to the grid.

3. The non-electrolytic long-life regulated constant-current driving power supply according to claim 1, characterized in that the structure of the electronic filter circuit (3) is: resistor R9 (22) is connected in series with capacitor C3 (23) Afterwards, it is connected in parallel with the resistor R8 (21) and connected to the secondary DC output side of the high-frequency transformer T1 (17); the connection point of the resistor R9 (22) and the capacitor C3 (23) is connected to the base of the triode V2 (24). The collector is connected to the other end of the resistor R9 (22); the capacitor C4 (25) is connected in parallel to the emitter of the triode V2 and the negative secondary output of the high-frequency transformer T1 (17).