CN202095162U

CN202095162U - Thyristor type driver of energy-saving lamp

Info

Publication number: CN202095162U
Application number: CN2011201247569U
Authority: CN
Inventors: 林文献
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2011-12-28
Anticipated expiration: 2021-04-21

Abstract

The utility model relates to a thyristor type driver of an energy-saving lamp, which is characterized by consisting of a thyristor delay circuit, a power source conversion circuit, a half-bridge inversion circuit and a lamp tube loop, wherein a mains supply sequentially passes through the thyristor delay circuit, the power source conversion circuit, the half-bridge inversion circuit and the lamp tube loop. Impact of surge to a filter capacitor is reduced greatly in the start instant by means of half-wave power supply, and a filament of a lamp tube can be prevented from being impacted by heavy current due to voltage drop in the instant of ignition of the lamp tube, so that main elements can be protected. Full-wave mains supply is realized after the lamp tube is turned on, and thereby brightness of the lamp tube is guaranteed. The driver can be used for the energy-saving lamp, can also be suitable for driving electromagnetic induction EB (electron beam) lamps, and is capable of prolonging the service lives of the lamps.

Description

Thyrister form electricity-saving lamp driver

Technical field:

The utility model belongs to electronic applications, and particularly a kind of thyrister form electricity-saving lamp driver also is applicable to drive electromagnetic induction FB lamp.

Background technology:

Electricity-saving lamp light efficiency coefficient and power consumption all are better than incandescent lamp, but at present the electricity-saving lamp lamp life-span can not show a candle to incandescent lamp, for a long time, electricity-saving lamp is known as for power saving does not save money, thus the generation of discarded enormous amount the new problem of energy-saving lamp electronic refuse pollution.Trace it to its cause, mostly be the defective of design of Driver greatly, light the impact that moment produces big electric current, cause tube filament and major loop filter capacitor to be hit,, just be afraid of frequent switch so existing electricity-saving lamp is fit to long time continuous working.The applicant is at a kind of electric ballast of first to file, patent publication No. CN101754548A, original creation has proposed the utilization of semi-bridge inversion technology in the electricity-saving lamp driver, adopt sliding technology frequently, the square-wave voltage frequency that makes semi-bridge inversion output slides to fluorescent tube high pressure ignition frequency from highest frequency under continuously, until the steady operation frequency, solve the vibration of auto-excitation type single-frequency point and become the continuous frequency conversion mode of oscillation, after realizing that the short circuit of lamp tube ends filament connects in the fluorescent tube loop, even the fracture of wire fluorescent tube still can be lighted by smooth high pressure and be normally luminous, till fluorescent tube lost efficacy, useful life of prolonging lamp tube thus.How to overcome the defective of heavy current impact when starting, promptly become the object of the utility model research.

Summary of the invention:

The purpose of this utility model is that a kind of startup of design is lighted moment and adopted the half-wave power supply, enters the power supply of civil power all-wave automatically subsequently, and the thyrister form electricity-saving lamp driver that cooperates of half-bridge inversion circuit.

Technical solutions of the utility model are achieved in that a kind of thyrister form electricity-saving lamp driver, it is characterized in that civil power is successively through controllable silicon delay circuit, power converting circuit, half-bridge inversion circuit and fluorescent tube loop composition.

Described controllable silicon delay circuit: a, main loop circuit: form by bidirectional triode thyristor BCR1, diode VD4, both and connect after be connected on the mains electricity input end; B, delay circuit: form the delay working power supply by diode VD3, capacitor C 5, resistance R 4, by resistance R 5, R6, R7, capacitor C 6, C7 form delay circuit, and it is extreme that its output is connected to the triggering of controllable silicon BCR1.

Described power converting circuit comprises a bridge rectifier BR and the filter capacitor C1 that is attempted by on the output.

Half-bridge inversion circuit: comprise start-up circuit and inverter circuit two parts, wherein start-up circuit is made up of resistance R 1, capacitor C 2, bidirectional diode VD2; Inverter circuit is made up of annular anamorphoser winding T1a, T1b, T1C, resistance R 2, R3, triode VT1, VT2.

Fluorescent tube loop: form by inductance L 1, capacitor C 3, C4, C5 and filament FL1, FL2.

The utility model starts moment and adopts the half-wave power supply, can significantly reduce to open the moment surge to the impact of filter capacitor, and light the voltage of moment at fluorescent tube and descend, and makes tube filament exempt from heavy current impact, plays the main components and parts effect of protection; Automatically enter the power supply of civil power all-wave after fluorescent tube is lighted, guarantee the brightness of fluorescent tube; This driver both can be used as the electricity-saving lamp driver, also was applicable to the driving of electromagnetic induction EB lamp, can prolong the useful life of light fixture integral body.

Description of drawings:

Below in conjunction with concrete legend the utility model is described further:

Fig. 1 thyrister form electricity-saving lamp driver principles block diagram

Fig. 2 thyrister form electricity-saving lamp drive circuit figure

Fig. 3 half-wave starts electricity-saving lamp driver equivalent circuit diagram

Fig. 4 all-wave electricity-saving lamp driver equivalent circuit diagram

Embodiment:

See figures.1.and.2, thyrister form electricity-saving lamp driver principles block diagram after civil power inserts, is formed through controllable silicon delay circuit, power converting circuit, half-bridge inversion circuit and fluorescent tube loop successively.

Wherein,

The controllable silicon delay circuit; A, main loop circuit: form by bidirectional triode thyristor BCR1, diode VD4; B, delay circuit: form the delay working power supply by diode VD3, capacitor C 5, resistance R 4, by resistance R 5, R6, R7, capacitor C 6, C7 form delay circuit, and the delay time of design is 1-2 second.

Power converting circuit: comprise-bridge rectifier BR and the filter capacitor C1 that is attempted by on the output;

The fluorescent tube loop: be made up of inductance L 1, capacitor C 3, C4, C5 and filament FL1, FL2, filament joint, two ends reason also is equal to the fracture of wire state.

The electrical principle explanation:

1, controllable silicon formula half-wave power supply time-delay is automatically converted to the all-wave power supply:

Civil power is through L, N line, and protective tube Fu adds to diode VD3 halfwave rectifier, and through capacitor C 5 filtering, resistance R 4 output buck of releasing is that 0.45 line voltage is supplied with the required direct voltage of delay circuit.

This direct voltage is formed charge circuit through resistance R 5, capacitor C 6, and time-delay, initial capacitance C6 goes up voltage and equals 0, through charging in 1 second, capacitor C 6 voltages are through the surge absorbing circuit of resistance R 6 current limlitings triggering bidirectional triode thyristor BCR1, resistance R 7, capacitor C 7 composition bidirectional triode thyristor trigger electrodes, and it is reliable to make it working stability.

Through delaying time 1 second, bidirectional triode thyristor BCR1 is triggered and conducting, and then civil power LN powers through bidirectional triode thyristor BCR1 all-wave.

2, the operation principle of half-bridge inversion circuit is technology formerly, omits explanation.

With reference to Fig. 3 and Fig. 4, as follows at the design principle of above-mentioned thyrister form electricity-saving lamp driver:

Electromagnetic induction EB lamp and electricity-saving lamp present the necessary and sufficient condition of high pressure in the time of all need possessing " resonance ", the pipe of could the start-up point lighting a lamp.This paper analysis is example with the electricity-saving lamp.

A: major loop filtering capacitor:

1, civil power (single-phase) half-wave power supply

As Fig. 3:

E: be the power frequency line voltage;

C: electricity-saving lamp major loop filter capacitor;

RL: equivalent electric circuit load resistance;

After powering up, initial capacitance C does not have voltage, through the very short charging that (is called transient process) in a flash, just reaches a new poised state, and at this moment the voltage on the capacitor C fluctuates up and down at UC, and average voltage is UL.

Rectifying tube D is not conducting in whole positive half cycle, and be just conducting when voltage exceeds rectifying tube D forward voltage drop on the Aiternating Current Voltage Ratio capacitor C of input, during rectifying tube D conducting, rectified current is except that sub-fraction supply load resistance R L, major part is charged to capacitor C, charging resistor is very little, and charging current is very big, and charging rate is very fast, charging interval is very short, after rectifying tube D ended, capacitor C was to load RL discharge, and discharging current is exactly a load current at this moment.The charging current of capacitor C is very big, and charging stream is especially big in the initial transition process, for rectifying tube D especially as surge current.This is the single phase half wave rectification filter circuit, at diode halfwave rectifier output-parallel filter capacitor, utilizes its effect that discharges and recharges, and can reduce ripple.Initial city's power supply and diode internal resistance when the diode forward conducting are very little, and diode halfwave rectifier output current provides the electric capacity charging on the one hand, and the circuit internal load is provided on the other hand.Thereby (in fact the diode output voltage almost all is added on the capacitor, voltage equals load voltage on the capacitor) electric capacity is to the inertia of voltage, promptly can not suddenly change to voltage, therefore primary voltage and electric charge that capacitor when charging for the first time occurred are zero, make charging current big especially, we claim that this moment, electric current was the surge current of rectifying tube, except causing the instantaneous heating of rectifying tube thus even burning because of stream pipe allowance is not enough, show that more seriously very big electric current has passed through capacitor on the numerical value, cause capacitor inside to be subjected to the impact and the serious heating of surge current simultaneously.

After entering operate as normal, the stream that at every turn charges need only add to the electric charge that loses owing to capacitor discharge that for the first time charged state is just passable, so charging current is much smaller for the first time for current ratio.

Halfwave rectifier can be considered to electric capacity charging that intermittence carries out; with full-wave rectification the trickle charge state of electric capacity is compared; the former average voltage only is the latter's 1/2; electric capacity is subjected to heavy current impact and causes the degree of electric capacity heating; the former alleviates greatly; therefore begin to adopt the halfwave rectifier charging between 1～2 second, can protect electric capacity effectively and prolong its useful life.

Before energy-saving lamp tube is not lighted, almost can think unloaded output to rectifier output, this voltage is near √ 2E, and after fluorescent tube was lighted, capacitor C was quickened discharge, and output voltage sharply descends, and makes filtering output approach 0.45E.

2, the bridge rectifier of electricity-saving lamp:

As Fig. 4

E: power frequency line voltage

C: electricity-saving lamp major loop filter capacitor

ZL: electricity-saving lamp bridge rectifier

RL: equivalent electric circuit load resistance

3, the initial voltage of filter capacitor C is relatively:

Power moment at half-wave and all-wave from Fig. 3 and the shown electricity-saving lamp of Fig. 4, there is so big difference in the added magnitude of voltage of filter capacitor C, as seen, adopt half-wave moment power supply, can exempt " surge current " very big threat fully, visible in number mean value 0.9E＞0.45E to filter capacitor C.

B: tube filament:

1, start instantaneous high pressure:

As can be known from Fig. 3, filter capacitor C is in the transient process charging during power supply of civil power half-wave, the rectifier output voltage is near √ 2E, resonance when rising to the LC natural frequency in fluorescent tube loop, electricity-saving lamp internal drive frequency takes place, filtering output was as broad as long when voltage was " zero load " voltage and normal civil power all-wave power supply here, therefore, the high pressure that " resonance " state presents is enough to start fluorescent tube, the power supply of civil power half-wave increases owing to the energy-saving lamp tube load immediately through the rectifier output voltage in short time after fluorescent tube is lighted, filter capacitor C quickens discharge, output voltage sharply descends, make the filtering output voltage approach 0.45E, exactly because this moment, voltage instantaneous descended, and made tube filament exempt from heavy current impact.

2, enter the all-wave power supply automatically:

The design's circuit can recover " all-wave " automatically from the mains-supplied state by " half-wave " time-delay, has guaranteed that electricity-saving lamp normally moves.

3, the half-wave power supply stage, electricity-saving lamp operates in little current phase, make the magnetic saturation process of (toroidal transformer) winding in the switching tube base loop slow down slowly, make voltage square wave frequency that two switching tube alternate conduction are exported by low gradually toward High variation, just because of there is this frequency to change continuously, be frequency sweep, could light fluorescent tube smoothly.

Claims

1. a thyrister form electricity-saving lamp driver is characterized in that civil power is successively through controllable silicon delay circuit, power converting circuit, half-bridge inversion circuit and fluorescent tube loop composition.

2. thyrister form electricity-saving lamp driver according to claim 1 is characterized in that the controllable silicon delay circuit is: a, main loop circuit: form by bidirectional triode thyristor BCR1, diode VD4, both and connect after be connected on the mains electricity input end; B, delay circuit: form the delay working power supply by diode VD3, capacitor C 5, resistance R 4, by resistance R 5, R6, R7, capacitor C 6, C7 form delay circuit, and it is extreme that its output is connected to the triggering of controllable silicon BCR1.

3. thyrister form electricity-saving lamp driver according to claim 1 is characterized in that power converting circuit comprises a bridge rectifier BR and the filter capacitor C1 that is attempted by on the output.

4. thyrister form electricity-saving lamp driver according to claim 1 is characterized in that half-bridge inversion circuit: comprise start-up circuit and inverter circuit two parts, wherein start-up circuit is made up of resistance R 1, capacitor C 2, bidirectional diode VD2; Inverter circuit is made up of annular anamorphoser winding T1a, T1b, T1C, resistance R 2, R3, triode VT1, VT2.

5. thyrister form electricity-saving lamp driver according to claim 1 is characterized in that the fluorescent tube loop: be made up of inductance L 1, capacitor C 3, C4, C5 and filament FL1, FL2.