CN202111917U

CN202111917U - Relay-type driver of energy-saving lamp

Info

Publication number: CN202111917U
Application number: CN2011201247855U
Authority: CN
Inventors: 林文献
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2012-01-11
Anticipated expiration: 2021-04-21

Abstract

The utility model relates to a relay-type driver of an energy-saving lamp. The relay-type driver of an energy-saving lamp is characterized by comprising a relay time-delay circuit, a power supply transformation circuit, a half-bridge inversion circuit and a tube loop, wherein commercial power successively passes through the relay time-delay circuit, the power supply transformation circuit, the half-bridge inversion circuit and the tube loop. Half-wave power supply is utilized the moment the relay-type driver of the utility model starts, thereby greatly minimizing the impact of surge on a filtering capacitor during the instant starting of the driver. And the voltage during the instant lighting of a tube is lowered, so that the filament of the tube is prevented from impact by heavy current so as to protect main components. After the tube is lighted, commercial power full-wave power supply is automatically provided, thereby guaranteeing brightness of the tube. The driver of the utility model can be used as the driver of an energy-saving lamp, is suitable for driving an electromagnetic induction EB lamp, and enables the service life of a whole light fixture to be prolonged.

Description

Relay-type electricity-saving lamp driver

Technical field:

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

Background technology:

Electricity-saving lamp light efficiency coefficient and power consumption all are superior to 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.Tracing it to its cause, is the defective of design of Driver mostly, lights the impact that moment produces big electric current, causes tube filament and major loop filter capacitor to be hit, so existing electricity-saving lamp is fit to long time continuous working, just is afraid of frequent switch.The applicant is at a kind of electric ballast of first to file, and patent publication No. CN101754548A creates having proposed the utilization of semi-bridge inversion technology in the electricity-saving lamp driver; Adopt sliding technology frequently; Make the square-wave voltage frequency of semi-bridge inversion output slide to fluorescent tube high pressure ignition frequency down continuously,, solve auto-excitation type single-frequency point and vibrate and become the continuous frequency conversion mode of oscillation until the steady operation frequency from highest frequency; 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 and normally luminous by smooth high pressure, 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 the utility model is that a kind of startup of design is lighted moment and adopted the half-wave power supply, gets into the power supply of civil power all-wave automatically subsequently, and the relay-type electricity-saving lamp driver that cooperates of half-bridge inversion circuit.

The utility model technical scheme is achieved in that a kind of relay-type electricity-saving lamp driver, it is characterized in that civil power is successively through relay delay circuit, power converting circuit, half-bridge inversion circuit and fluorescent tube loop composition.

Said relay delay circuit is: a, main loop circuit: by diode VD3, the normally open contact J of relay J forms, both and connect after be connected on the mains electricity input end; B, delay circuit: by resistance R 4, R5, regulation pipe DW1, resistance R 6, diode VD4, resistance R 7, capacitor C 6, triode VT3, relay J, diode VD5 form.

Said power converting circuit comprises a bridge rectifier BR and is attempted by the filter capacitor C1 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; Fluorescent tube is lighted the back and is got into the power supply of civil power all-wave automatically, guarantees 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 further specified:

Fig. 1 relay-type electricity-saving lamp driver principles block diagram

Fig. 2 relay-type 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, relay-type electricity-saving lamp driver principles block diagram after civil power inserts, is formed through relay delay circuit, power converting circuit, half-bridge inversion circuit and fluorescent tube loop successively.

Wherein:

Relay delay circuit: a, main loop circuit: by diode VD3, often the opening of relay J touched and lost J and form, both and connect after be connected on the mains electricity input end; B, delay circuit: by resistance R 4, R5, regulation pipe DW1, resistance R 6, diode VD4, resistance R 7, capacitor C 6, triode VT3, relay J, diode VD5 form; The delay time of design is 1-2 second, and relay J is closed, and short circuit diode VD5 forms the all-wave power supply.

Power converting circuit: comprise-bridge rectifier BR be attempted by the filter capacitor C1 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, relay system half-wave power supply time-delay is automatically converted to the all-wave power supply:

Civil power through L, N through diode VD3, bridge rectifier BR rectification; Voltage average out to 0.45 line voltage value is produced in capacitor C 1 filtering; One the tunnel directly supplies with semi-bridge type inverter work; Another road is through the operating voltage of resistance R 4, R, series connection dividing potential drop voltage-stabiliser tube voltage stabilizing output low-voltage dc voltage supply delay circuit, and to capacitor C 2 chargings, warp was delayed time 1 second through resistance R 6 in voltage stabilizing; Voltage on the capacitor C 2 adds to triode VT3 base stage through resistance R 7 current limlitings, and the normally opened contact J of triode VT3 turn-on relay J attracting electric relay presents closed and short circuit diode VD3.

Civil power L, N add to bridge rectifier BR, capacitor C1 through circuit-closing contacts J all-wave at this moment, and 310 volts of voltages of filtering output supply half bridge inverter circuit work.Thereby accomplished from civil power half-wave power supply time-delay and be automatically converted to the power supply of civil power all-wave after 1 second.

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

With reference to Fig. 3 and Fig. 4, following to the design principle of above-mentioned relay-type 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

Like 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 is 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, and most to the capacitor C charging, charging resistor is very little; Charging current is very big, and charging rate is very fast, and the 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 like 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 inside circuit 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, primary voltage and electric charge that capacitor when charging for the first time therefore 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, more serious is to show that very big electric current has passed through capacitor on the numerical value, causes capacitor inside to receive the impact and the serious heating of surge current simultaneously.

After getting into operate as normal, each charging stream need only add to the electric charge that loses owing to capacitor discharge that charged state is just passable for the first time, so the current ratio charging current first time is much little.

Halfwave rectifier can be considered to electric capacity charging that intermittence carries out; With full-wave rectification to the trickle charge compared of electric capacity; The former average voltage is merely the latter's 1/2, and electric capacity receives heavy current impact and causes the degree of electric capacity heating, and 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:

Like 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:

Supply power moment at half-wave and all-wave from the electricity-saving lamp that Fig. 3 and Fig. 4 showed; There is so big difference in the added magnitude of voltage of filter capacitor C; It is thus clear that; Adopt half-wave moment power supply, can exempt " surge current " very big threat fully, visible in number mean value 0.9E＞0.45E filter capacitor C.

B: tube filament:

1, start instantaneous high pressure:

From Fig. 3, can know; Filter capacitor C is in the transient process charging during power supply of civil power half-wave; The rectifier output voltage is near

E; Resonance, electricity-saving lamp internal drive frequency takes place when rising to the LC natural frequency in fluorescent tube loop; Filtering output was as broad as long when voltage was " zero load " voltage and normal civil power all-wave power supply here, and therefore, the high pressure that " resonance " state demonstrates is enough to start fluorescent tube; The power supply of civil power half-wave increases owing to the energy-saving lamp tube load through the rectifier output voltage immediately in short time after fluorescent tube is lighted; Filter capacitor C quickens discharge, and output voltage sharply descends, and makes the filtering output voltage approach 0.45E; Exactly because this moment, voltage instantaneous descended, and made tube filament exempt from heavy current impact.

2, get into the all-wave power supply automatically:

The design's circuit can recover " all-wave " from the mains-supplied state by " half-wave " time-delay automatically, 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 relay-type electricity-saving lamp driver is characterized in that civil power is successively through relay delay circuit, power converting circuit, half-bridge inversion circuit and fluorescent tube loop composition.

2. relay-type electricity-saving lamp driver according to claim 1 is characterized in that the relay delay circuit is:

A, main loop circuit: by diode VD3, the normally open contact J of relay J forms, both and connect after be connected on the mains electricity input end; B, delay circuit: by resistance R 4, R5, regulation pipe DW1, resistance R 6, diode VD4, resistance R 7, capacitor C 6, triode VT3, relay J, diode VD5 form.

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

4. relay-type 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. relay-type 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.