CN2132379Y - Light-adjusting sine wave electronic rectifier - Google Patents

Abstract

The utility model discloses a light-adjusting sine wave electronic rectifier, which can replace all the other rectifiers, and is widely applicable for florescent lamps and other lamp fittings. The utility model is characterized in that a charge storage time automatic equalization circuit and a higher-order harmonics absorption circuit are adopted, which enables the electronic rectifier to have the function of outputting sine voltage and the performance of pressure regulation and light regulation. The dimmer circuit adopts a soft-magnetic ferrite high frequency filter circuit, which enables the thyristor dimmer circuit to adjust to capacitive loads. The light-adjusting sine wave electronic rectifier changes the limitation that pressure regulation and light regulation can not be carried out in florescent lamps. The light-adjusting sine wave electronic rectifier has the advantages of high efficiency, energy saving, stability, reliability, mature technology and low cost, and thus, is an ideal product in the present lighting industry.

Description

Light-adjusting sine wave electronic rectifier

The utility model relates to a kind of fluorescent lamp electric ballast.Its sine wave output voltage, energy conversion efficiency is high.Except that possessing functions such as general electric ballast startup, current limliting, also possesses the performance of pressure regulation, light modulation.Fluorescent lamp can be realized the purpose of dimming energy-saving.This circuit of electronic ballast is reasonable in design, mature production technology.Can replace all other ballasts, be widely used on fluorescent lamp and the light fixture thereof.

Nowadays each state is all at active research, production high-efficiency and energy-saving type electric ballast.Just, there is the fluorescent light fixture of electric ballast in fluorescent lamp electron rectifier of selling in the market and generation, all exist common defective: the one, this electric ballast is because the limitation in the design, should not be operated in under-voltage operating state, otherwise can damage transistor in the circuit greatly because of mains ripple.The 2nd, sort circuit is in when work, the permeability of its frequency of oscillation major decision high-frequency pulse transformer magnet ring.Because the permeability discreteness of magnet ring is bigger, the consistency of its operating frequency of electric ballast that identical components and parts are produced also departs from bigger, so under the situation of fixing series connection current-limiting inductance, can produce following two kinds of results: when 1. owing power consumption, the luminous deficiency of fluorescent lamp, its useful life is longer.When 2. crossing power consumption, can cause life-span of fluorescent lamp to shorten greatly or electric ballast burns because of overheated.The 3rd, fluorescent lamp can not can be made dimming lamp as incandescent lamp, to satisfy the demand of people's life, work, study.The 4th, in generation, have the fluorescent lamp of electric ballast to be operated in pulse condition, and its harmonic wave composition is bigger, and forms an interference source.Though the electric ballast power savings is remarkable thus, still fail so far extensively to be generalized among the civilian and industrial illumination.

The purpose of this utility model has overcome the drawback that above-mentioned electric ballast exists and a kind of Light modulating type sine wave electronic ballast that designs just.With regard to the stable and security reliability of energy-conservation effect, performance etc., the utility model has been done following consideration: 1. in order to improve the luminous efficiency of fluorescent lamp, about existing operating frequency doubled.2. taked the measure of transistor charge storage time automatic equalization in circuit, electric ballast has possessed constant current and has become the resistance feature, and fluorescent lamp can be realized the function of voltage-control dimming.3. in order to give full play to the physical characteristic of fluorescent lamp itself, select fluorescent lamp to be operated in pure resistance service area.4. increase the high order harmonic component absorption circuit, make and flow through the fluorescent lamp electric current and be sinusoidal wave, its distortion factor＜5%.5. set up negative-feedback circuit, further improve the stability of circuit working.6. the series connection current-limiting inductance is made adjustable element, guarantee sine wave electronic ballast consistency of product.7. product adopts the perfusion of iron-clad encapsulation (magnetic cup is worn-out) pitch, improves its safety and reliability.

Combine with circuit theory with regard to the purpose of this utility model realization below and illustrated.(Fig. 1) provided frame principle figure for the sine wave electronic ballast of light adjusting circuit.(1) separation filter, (2) controllable silicon light modulation circuit, (3) high frequency filter, (4) bridge rectifier, (5) polarity identification circuit, (6) circuits for triggering among the figure; (7), (8) electronic switch, (9), (10) charge storage time automatic equalization circuit, (11) current-limiting inductance, (12) fluorescent lamp.W1 is the phase modulation potentiometer in the circuit, and it and K switch are formed one.R1 is a DC channel resistance, C1 filter capacitor, C2 capacitance, B1 high-frequency pulse transformer.

The utility model is by the voltage-control dimming circuit: (1), (2), (3), W1, K and sine wave electronic ballast (4), (5), (6), (7), (8), (9), (10), (11), C1, C2, R1, B1 form.They be both capable of being combined also can independently to exist.According to circuit theory, outside the phase modulation potentiometer W1 of deblooming lamp (12) and belt switch K, be installed on the printed substrate.The connecting line of power supply, fluorescent lamp and potentiometer with switch can directly be welded on the corresponding position of printed substrate, perhaps at the printed substrate interconnecting devices of burn-oning, is linked to be a complete circuit by interconnecting devices and power supply, fluorescent lamp, potentiometer with switch.The utility model also can be with the circuit separated into two parts---be voltage-control dimming circuit and sine wave electronic ballast, respectively be welded in independently on the printed substrate that the line between them directly connects with lead equally or links up by interconnecting devices.

The voltage-control dimming circuit is selected common bidirectional triode thyristor light adjusting circuit for use.The time constant of the size adjustment trigger network of potentiometer W1, the angle of flow of control bidirectional triode thyristor goes to realize the brilliance control to lamp.General controllable silicon light modulation circuit only is suitable for pure resistance load.And electric ballast belongs to capacitive load for the controllable silicon light modulation circuit, so impulse waveform can cause the stroboscopic of fluorescent lamp, can't be accepted by the people.In order to address this problem, inserted high frequency filter (3) in the circuit.High-frequency inductor and shunt capacitance that it does the magnetic core coiling by the soft magnetic ferrite magnetic material are formed.(Fig. 2) show its physical circuit schematic diagram.What it was different with general light adjusting circuit is to have increased separation filter L201 at input, in case high order harmonic component seals in the power supply network.Inserted the high-frequency filter circuit of forming by L202, C202 at output, to adapt to capacitive load.

The operation principle of sine wave electronic ballast is to be based upon pulse generator and to be made up of the series resonance load of current-limiting inductance (11) and fluorescent lamp (12) formation.Circuit requires the natural mode shape of pulse generator and the series resonance frequency of load to match when operate as normal, impedance phase coupling therebetween, and load could absorb electric energy in maximal efficiency ground.Therefore in circuit in the past, just by simple test, change up and down under the little condition in rated voltage, the component parameter value in the configuration circuit is to satisfy the demand of circuit working.So the natural mode shape of pulse generator and differ bigger by the series resonance frequency that load is formed, the voltage that is added in the fluorescent lamp two ends contains more harmonic wave composition.When changing applied voltage, especially reduce under the supply power voltage situation, can cause circuit frequency and impedance mismatching in certain zone even more serious.Automatically regulate frequency of oscillation and the utility model is provided with balanced compensation circuit in circuit, normally work with holding circuit.Have as electronic switch (7), (8), they are alternately conductings and end, and guarantee that these two electronic switches in the friendship time more, the phenomenon of conducting simultaneously can not take place again, also require to be provided with in the circuit to guarantee that two pipes possess elder generation and close the measure of afterwards opening.Collecting above-mentioned requirement, is the place that the utility model adds charge storage time automatic equalization circuit (9), (10).(Fig. 3) provided charge storage time automatic equalization circuit schematic diagram.

In order further to reduce the current harmonics composition that flows through fluorescent lamp, electric capacity in parallel absorbs high order harmonic component at current-limiting inductance (11) two ends, improves distortion factor.Current-limiting inductance employing enamelled wire is inserted with on the plastic skeleton of high frequency screw core in the middle of being wound on I shape.How much deciding of the number of turns on the size of fluorescent lamp wattage.The line of enamelled wire is directly selected thick as far as possible, to reduce owing to kelvin effect causes extra energy consumption.Current-limiting inductance is made adjustable element, has overcome the characteristic that can't unify electric ballast because of the error of component parameter.

(Fig. 4) provided sine wave electronic ballast circuit schematic diagram.About the operation principle of electric ballast, relevant article all has introduction, here no longer narration.This paper has only done to illustrate to circuit theory different understanding and circuit difference.The electron rectifier circuit is also uncomplicated, but it is many to influence the circuit working factor, and simple anything but plagiarism and imitation can prove effective.Carry out the work of this respect, remove circuit theory is done deep understanding, also to solve the physical characteristic of fluorescent lamp in the circuit design itself: as the relation between modulating voltage and the lamp current, the relation of operating frequency and luminous efficiency, the relation of operating current and lamp impedance, and extraneous power supply is when changing, the frequency between pulse generator and the load, the relation of impedance matching, or the like these all need a large amount of experiments that foundation is provided.

Its specification of fluorescent lamp itself is various in style, from 40W～5W not following tens kinds, its physical characteristic of fluorescent tube of different wattage different tube diameters has nothing in common with each other, select the supplemental characteristic of different operating frequency circuit also to be not quite similar, so can not simply describe with a kind of data parameters, so this paper only tells about the structure and the essential characteristic thereof of circuit, (table 1) shows the typical constant current of 40W fluorescent lamp---become the resistance characteristic.

The utility model is the sine wave electronic ballast for light adjusting circuit, it is applicable to the light fixture that the compact fluorescent lamp is formed, as desk lamp, wall lamp, floor-lamp or with the lighting apparatus of other household electrical appliance combination, the utility model also can be with light adjusting circuit and circuit of electronic ballast separated into two parts, forms tunable optical type and lighting that can not Light modulating type two kinds respectively.Do not form by (4), (6), (7), (8), (9), (10), (11), C1, C2, R1, B1 for the electric ballast of light adjusting circuit.The civil power of 220V, 50Hz directly inserts the input (seeing figure-AA ') of bridge rectifier (4).It is applicable to various model fluorescent lamps, the electric ballast of tunable optical type is with the circuit separated into two parts, respectively the light modulation power circuit of forming by (1), (2), (3), (4), W1, K and by: the sine wave electronic ballast circuit (seeing figure-BB ') that (5), (6), (7), (8), (9), (10), (11), C1, C2, R1, B1 form, it is applicable to the various straight tube fluorescent lamps of 18W～40W, ceiling light etc.The light modulation power circuit can be contained in the wall-board switch place, is controlling the brightness regulation of connection, shutoff and the lamp of fluorescent lamp power supply.The sine wave electronic ballast circuit directly is contained in the top in room with lamp composition one.Because what the light modulation power circuit sent is DC power supply, thus in the sine wave electronic rectifier circuit adjunction polarity identification circuit (5).(in Fig. 1, dotting).Can prevent that the stop polarity wrong burns electric ballast.Circuit polarities connects right, fluorescent lamp work.The circuit polarities wrong, circuit is obstructed and do not work.A rectification diode is the simplest polarity identification circuit.

The utility model adopts the metal shell encapsulation according to the requirement of International Power meeting IEC, and the pitch perfusion was both safe and reliable, possesses the worn-out antimagnetic characteristics of screen again.

Claims (5)

1, a kind of Light modulating type sine wave electronic ballast, it comprises separation filter (1), controllable silicon light modulation circuit (2), high frequency filter (3), bridge rectifier (4), polarity identification circuit (5), circuits for triggering (6), electronic switch (7) (8), charge storage time automatic equalization circuit (9) (10), current-limiting circuit (11), potentiometer W1 for switch, DC channel resistance R 1, filter capacitor C1, capacitance C2 and high-frequency pulse transformer B1 form, it is characterized in that: high frequency filter (3), charge storage time automatic equalization circuit (9) (10), the connection of current-limiting circuit (11).

2, Light modulating type sine wave electronic ballast according to claim 1, it is characterized in that to form tunable optical type and can not two kinds of circuit of Light modulating type respectively, sine wave electronic ballast that can not Light modulating type is by (4), (6), (7), (8), (9), (10), (11), C1, C2, R1, the B1 circuit is formed, 220V, the civil power of 50Hz directly inserts the input of bridge rectifier (4), it is applicable to various model fluorescent lamps, the electric ballast of tunable optical type is with the circuit separated into two parts, be by (1), (2), (3), (4), W1, the light modulation power circuit that K constitutes and by (5), (6), (7), (8), (9), (10), (11), C1, C2, R1, the sine wave electronic ballast circuit that B1 forms, it is applicable to various straight tube fluorescent lamps, ceiling light etc., the light modulation power circuit can be contained in the wall-board switch place, controlling the connection shutoff of fluorescent lamp power supply and the adjusting of fluorescent lamp brightness, the sine wave electronic ballast circuit can be formed one with lamp, is contained in the top in room.

3, Light modulating type sine wave electronic ballast according to claim 1 is characterized in that high frequency filter (3), at high-frequency bypass capacitor of the back of High frequency filter inductance cross-over connection.

4, Light modulating type sine wave electronic ballast according to claim 1, its feature is a charge storage time automatic equalization circuit (9), (10), they are resistance-capacitance circuits, resistance R 404, R405 and capacitor C 404 are in series, at the two ends of resistance R 405 shunt capacitance C405, capacitor C404 two terminates at switching tube ed knot place, be connected to R405, the parallel connected end of C405 is connected across an end of the secondary winding of high-frequency pulse transformer B1, and the charge storage time automatic equalization circuit structure of cross-over connection is same as described above fully between secondary another winding of another switching tube and high-frequency pulse transformer B1.

5, Light modulating type sine wave electronic ballast according to claim 1: it is characterized in that current-limiting inductance (11), system adopts enamelled wire to be wound on the middle coil that is inserted with the tunable high-frequency screw core of I shape plastic skeleton, the two ends of coil capacitor in parallel, to absorb high order harmonic component, proofread and correct sinusoidal wave.

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