CN2203019Y

CN2203019Y - Single tube switch type high-frequency electronic ballast

Info

Publication number: CN2203019Y
Application number: CN 94246183
Authority: CN
Inventors: 杨红俊
Original assignee: LOCKUP KUNMING CITY PUBLIC SECURITY BUREAU
Current assignee: LOCKUP KUNMING CITY PUBLIC SECURITY BUREAU
Priority date: 1994-11-24
Filing date: 1994-11-24
Publication date: 1995-07-05
Anticipated expiration: 2004-11-24

Abstract

The utility model relates to a single tube switch type high-frequency electronic ballast. The utility model is characterized in that a high-frequency interference suppressor circuit is composed of a capacitor C1, an inductor T1 and a capacitor C2. A rectification filtering circuit is composed of D1, D2, D3, D4 and a capacitor C3. An oscillation circuit is composed of a power tube BG1 and a pulse transformer T2, wherein, a positive feedback circuit is composed of R2 and a capacitor C4, a fluorescent lamp startup resonator is composed of a main coil L1 of the pulse transformer T2 and a capacitor C5, a working resonator is composed of the main coil L1 and a capacitor C6, PTC is used for preheating when the electronic ballast is started, and a protective circuit is composed of a triode BG2, D5, a capacitor C7, R4 and R5. The utility model has the advantages of high reliability, stable work, less electromagnetic radiation, long service life, low cost, material saving, electrical energy saving, etc.

Description

Single tube switch type high-frequency electronic ballast

The utility model relates to fluorescent lamp ballast, specifically single tube switching regulator high-frequency electronic ballast.

Fluorescent lamp be to use one of lighting very widely.Ballast is the important accessory of fluorescent lamp, electric ballast has appearred in recent years, all adopt two-tube switch work, realization is powered to fluorescent lamp high frequency, because the two-tube both ends of power that is serially connected in, especially bipolar transistor body itself have " storage effect ", work in magnifying state very easily simultaneously and cause the power tube punch through damage, make product reliability poor, the cost height.The fluorescent lamp electric current is with high-frequency magnetic leakage choking-winding ballast simultaneously, and the high frequency width of cloth is penetrated more serious, and audio-visual equipment is had certain interference.

The purpose of this utility model is to provide a kind of above-mentioned deficiency that can overcome, and realizes the single tube switching regulator high-frequency electronic ballast of the advantage of fluorescent lamp high frequency, single tube work and reserved high-frequency electric ballast.

The utility model is achieved in that on Switching Power Supply principle basis the High-frequency Interference that is made of capacitor C 1, inductance T1, capacitor C 2 suppresses circuit, eliminates the interference of Switching Power Supply to electrical network.D1～D4, C3 constitute current rectifying and wave filtering circuit, to set up operating voltage.Power tube BG1, pulse transformer T2 constitute the vibration road; main vibration is finished by BG1; the weakness of having eliminated " storage effect " easy conducting simultaneously of two-tube electric ballast existence and having damaged; R2 wherein, C4 constitute positive feedback; make BG1 supply with resonant circuit to electric energy as switch; the main winding L1 of T2 and C6 constitute fluorescent lamp starting resonance; fluorescent lamp opens combustion back L1 and C6 constitutes work resonance; when PTC is used to start to the Filament of fluorescent lamp preheating; and assist and open the combustion fluorescent lamp, triode BG2, D5, C7, R4, R5 constitute abnormity protection circuit.To realize the circuit protection of unusual or overvoltage.

The utlity model has the reliability height, working stability, electromagnetic radiation is little, and the life-span is long, and cost is low, saves material, saves advantages such as electric energy.

Fig. 1 is circuit theory diagrams of the present utility model

Fig. 2 is an outline drawing of the present utility model

Embodiment; as shown in Figure 1; constitute High-frequency Interference by capacitor C 1, inductance T1, capacitor C 2 and suppress circuit; D1～D4, C3 constitute current rectifying and wave filtering circuit; power tube BG1, pulse transformer T2 constitute the vibration road; wherein R2, C4 constitute positive feedback; make BG1 supply with resonant circuit to electric energy as switch; the main winding L1 of T2 and C5 constitute fluorescent lamp starting resonance; fluorescent lamp opens combustion back L1 and C6 decision work resonance; to the Filament of fluorescent lamp preheating, and auxiliary open the combustion fluorescent lamp when PTC is used to start, triode BG2, D5, C7, R4, R5 constitute abnormity protection circuit.Its connecting mode is: connect with capacitor C 6 after fluorescent lamp and the PTC parallel connection, again with pulse transformer main winding L1 formation in parallel LC resonant circuit, it one is terminated at the direct current high potential of exporting behind the rectifying and wave-filtering, the collector electrode of another termination power tube BG1, the feedback coil L2 of transformer and main coil L1 induction coupling, supply power pipe BG1 positive feedback makes the BG1 power supply can give resonant tank.C5 is attempted by between the collector electrode and emitter of BG1, is used to absorb high back-pressure electromotive force, and constitutes the resonant capacitance that opens the combustion fluorescent lamp.

Claims

1; a kind of single tube switching regulator high-frequency electronic ballast; it is characterized in that by capacitor C 1; inductance T1; capacitor C 2 constitutes High-frequency Interference and suppresses circuit; D1～D4; C3 constitutes current rectifying and wave filtering circuit; power tube BG1; pulse transformer T2 constitutes the vibration road; R2 wherein; C4 constitutes positive feedback; make BG1 supply with resonant circuit to electric energy as switch; the main winding L1 of T2 and C5 constitute fluorescent lamp starting resonance; fluorescent lamp opens combustion back L1 and C6 constitutes work resonance; when PTC is used to start to the Filament of fluorescent lamp preheating; and the auxiliary combustion fluorescent lamp, triode BG2 of opening; D5; C7; R4; R5 constitutes abnormity protection circuit.

2, by the described electric ballast of claim 1, it is characterized in that connecting with capacitor C 6 after fluorescent lamp and the PTC parallel connection, again with pulse transformer main winding L1 formation in parallel LC resonant circuit, it one is terminated at the direct current high potential of exporting behind the rectifying and wave-filtering, the collector electrode of another termination power tube BG1, the feedback coil L2 of transformer and main coil L1 induction coupling, supply power pipe BG1 positive feedback, C5 is attempted by between the collector electrode and emitter of BG1.