CN2081628U

CN2081628U - Energy-saving electronic ballast of fluorescent lamp

Info

Publication number: CN2081628U
Application number: CN 91215035
Authority: CN
Inventors: 高建勋
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-01-16
Filing date: 1991-01-16
Publication date: 1991-07-24

Abstract

The utility model relates to an energy-saving electronic ballast of fluorescent lamps, which matches with a fluorescent lamp. The AC input end of the energy-saving electronic ballast of fluorescent lamps is connected with an overvoltage protective resistor and a suppressing circuit of higher harmonic interference, and an over-heat protective resistor which can be used for compensation and improvement of the power supply efficiency of the electric network is in coupled connection between the base electrode and the emitting electrode of a triode. When the utility model is used, the light rays are soft, and flicker and noise can not be generated; when the energy-saving electronic ballast of fluorescent lamps works under the condition that the environmental temperature is between 25 DEG Centigrade below zero and 40 DEG Centigrade and the voltage of the mains supply is lower than 220V, the energy-saving electronic ballast of fluorescent lamps can be once started after being preheated for less than two seconds; compared with the traditional inductance type ballast, the power can be saved by 23%.

Description

Energy-saving electronic ballast of fluorescent lamp

The utility model relates to a kind of electronic ballast for fluorescent lamps, particularly has the electric ballast of overvoltage protection, overtemperature protection and inhibition high order harmonic component interfered circuit.

Before the utility model came out, what general family used was traditional inductance type ballast, and its shortcoming is that fluorescent lamp can not normally use when being lower than civil power 220V power supply, and the cost height, consumptive material, power consumption.In recent years; electric ballast goes on the market successively; model is various; circuit-mode is similar, has energy-conservationly, enlarges fluorescent lamp starting voltage scope; prolong advantages such as fluorescent lifetime; but also exist technical barrier solutions not yet in effect such as overvoltage protection, overtemperature protection and inhibition high order harmonic component, produce the fluorescent lighting job insecurity thus, be difficult to problems such as popularization.

The purpose of this utility model is to provide a kind of can substitute inductance type ballast, performance is better than common electric ballast again, and have energy-conservation, material-saving equally and can solve overvoltage, overheated, effectively control the novel electron ballast of the problem that high order harmonic component disturbs.

The purpose of this utility model is achieved in that a kind of energy-saving electronic ballast; it is made up of shell, resistance, electric capacity, diode, triode and coil; be characterized in: ac input end also is connected to overvoltage protection resistance and suppresses the high order harmonic component interfered circuit, and lotus root is connected to overtemperature protection resistance between transistor base and emitter in circuit.

The utility model compared with prior art; have energy-conservation, material-saving, steady performance has especially adopted overvoltage, overcurrent protective device and inhibition high order harmonic component interfered circuit; prolong the useful life of electric ballast greatly, reduced unnecessary trouble existing when using.

Drawing is described as follows:

Fig. 1 is the utility model external form figure, and number in the figure 1 is the output connection hole;

Fig. 2 is the utility model electricity functional-block diagram;

Fig. 3 is the utility model electrical schematic diagram;

The utility model most preferred embodiment; referring to Fig. 3; ac input end also is connected to overvoltage protection resistance R MY; RMY is a piezo-resistance; voltage-controlled voltage 300V～600V; suppress the high order harmonic component interfered circuit by capacitor C 1; C2; coil T1; T2 forms; its input also is connected to resistance R MY two ends; output also is connected to ballasting circuit; capacitor C 1; C2 is 0.01 μ F/500V; coil T1; T2 is 75T; be wound on the same skeleton; capacitor C 3 adopts 10 μ F/400V in the circuit; capacitor C 4 adopts 0.1 μ F/63V; capacitor C 5 adopts 6800PF/400; capacitor C 6 adopts 0.1 μ F/63V; capacitor C 7 adopts 0.047 μ F/400V; capacitor C 8 adopts 0.02 μ F/630V, and resistance R 1 is 680K Ω, and resistance R 2 is 470K Ω; resistance R 3; R4 adopts 5 Ω; resistance R 5; R6 adopts 8.1 Ω, and the ballasting circuit diode is D1; D2; D3; D4, diode D5 adopt the IN4007 pipe; diode D6 adopts two-way triggering DB3 model pipe; puncture voltage 32V, triode BG1 in the circuit; BG2 adopts the TIP50 pipe, and lotus root is connected to resistance R T1 between triode BG1 base stage and emission two ends; lotus root is connected to resistance R T2 between triode BG2 base stage and emitter two ends; resistance R T1; RT2 is 10 Ω, and coil T3 is coiling 6/4/4T on the circular magnet ring, and inductance L 1 is 2mL.When the 220V alternating voltage, through D1, D2, D3, the D4 bridge rectifier, after the C1 filtering, obtain the direct voltage of about 300V, resistance R 1, capacitor C 4, diac D6 forms the startup saw-toothed wave generator, behind the power connection, because triode BG1, BG2 is in zero bias condition, all not conductings, the 300V direct voltage is by 4 chargings of 1 pair of capacitor C of resistance R, when the voltage on the capacitor C 4 reached the puncture voltage of bidirectional trigger diode D6, diode D6 punctured, and capacitor C 4 is discharged to triode BG2 base loop by diode D6, there is a short duration current to flow into triode BG2 base stage, make it conducting, the 300V direct voltage is through capacitor C 7, Filament of fluorescent lamp, capacitor C 8, inductance L 1, the former limit of coil T2, the collector electrode of triode BG2, emitter constitutes the loop, give inductance L 1, the charging of capacitor C 8 series resonant tank by means of the positive feedback effect of T3, guarantees triode BG1, the in turn conducting of BG2 and ending, make series resonant circuit produce free oscillation, give the fluorescent wire preheat curent, and produce the starting resistor of 400V at the fluorescent lamp two ends, fluorescent lamp starts immediately.After the startup, light tube electric voltage is 105V, and the operating current of fluorescent tube is about about 0.35 ampere, can produce the luminous flux greater than 2000 lumens.After the circuit starting of oscillation, because resistance R 1, capacitor C 4 time constants are bigger, and the voltage on the capacitor C 3 is through diode D5, and triode BG2 discharges, and diode D6 also just is provided with trigger voltage, and trigger starting circuit quits work.Resistance R 2 in the circuit, and capacitor C 5 is formed phase-shift network, makes fundamental frequency voltage and the basic homophase of electric current in the output loop.

Being provided with of resistance R MY mainly is to absorb the spike high pressure in the utility model, to prevent that electric ballast from adopting the semi-conductor electricity sub-element, hold the impact of the higher pressure of daring not accept, as overvoltage than macro-energy, then flow through bigger electric current on the RMY and make fusible link BA1 fusing, all can operate as normal in 60～110% the range of nominal tension to guarantee electric ballast.When preventing that defeated eight supply voltages from surpassing 110% rated voltage or because other reasons; temperature of transistor is risen; this electric ballast is on the one hand at the transistor emitter series resistor; play negative feedback; on the other hand at transistor base and emitter two ends and meet thermistor RT1, RT2; like this; resistance R T1 when temperature rises; RT2 reduces; the excitation of triode is reduced, and power output reduces, and the power consumption of triode own reduces; the triode temperature is descended, reach the purpose of overtemperature protection.

The utility model can a Fast starting during less than 130V in starting voltage, flicker free, and can bear overvoltage and impact, be particularly useful for the supporting use of fluorescent lamp.

Claims

1, a kind of energy-saving electronic ballast; it includes shell, resistance, electric capacity, diode, triode and coil and forms; it is characterized in that ac input end and be connected to overvoltage protection resistance and inhibition high order harmonic component interfered circuit, lotus root is connected to overtemperature protection resistance between transistor base and emitter in circuit.

2, electric ballast according to claim 1 is characterized in that: ac input end also is connected to overvoltage protection resistance R MY.

3, electric ballast according to claim 1 is characterized in that: suppress the high order harmonic component interfered circuit and be made up of capacitor C 1, C2, coil T1, T2, its input also is connected to resistance R MY two ends, exports and be connected to ballasting circuit.

4, electric ballast according to claim 1 is characterized in that: lotus root is connected to resistance R T1 between triode BG1 base stage and emitter two ends, and lotus root is connected to resistance R T2 between triode BG2 base stage and emitter two ends.