CN2393302Y

CN2393302Y - Resonance type electronic ballast

Info

Publication number: CN2393302Y
Application number: CN 99214642
Authority: CN
Inventors: 毛新春
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-30
Filing date: 1999-06-30
Publication date: 2000-08-23
Anticipated expiration: 2009-06-30

Abstract

The utility model discloses a resonant-type electronic starter which belongs to the electronic field. The resonant-type electronic starter solves the problems of no capability of one-shot starting, high power supply voltage requirement when started, easy damage, etc., existing in the publicly known starter. An electrolytic capacitor and a rectifying diode are connected in parallel, and simultaneously are connected with a drain resistor in parallel; another electrolytic capacitor and another rectifying diode are connected in parallel, and simultaneously are connected with another drain resistor in parallel; then, after connected in series via a switch type PTC thermistor, the two parts are connected in parallel with another switch type PTC thermistor and a display circuit, and thus a resonant-type electronic starter circuit is formed. The electronic starter using the structure has high starting rate and little pollution caused by the starting process to electric networks, and has a protective action for lamp tubes, ballasts and electronic starters. The utility model can start fluorescent lamps under relatively low voltage, and can start parts of fluorescent lamps which can not be started by other types of starters under the same power supply voltage.

Description

A kind of resonant mode electronic starter

The utility model discloses a kind of resonant mode electronic starter, belong to electronic applications.

Starter is one of annex of fluorescent lamp, is used glow starting fluorescent lamp or other gaseous discharge lamp with inductance type ballast.Present public starter mainly contains the mechanical contact-type starter and (claims to jump bubble again, be a kind of time delay automatic switch) and the all-round electronic starter of fluorescent lamp etc., from their common ground of operation principle is by closing (leading to), open (breaking) and come glow starting fluorescent lamp, in use the problem of Cun Zaiing has: can not a starter; The minimum power supply voltage, of daylight lamp glow starting all more than 150 volts, is higher than the minimum voltage that fluorescent lamp is kept conducting; The preheating of filament is difficult to the degree that reaches desirable; It is shorter that starter disconnects the back electromotive force wave mode time to peak of moment inductance type ballast generation, waveform is sour jujube, sharp wave, start relatively " firmly ", cause the electronic emitting material sputter serious during starter, cause daily lamp two ends blackout, shortened the useful life of fluorescent lamp, sour jujube, sharp wave pollute electrical network simultaneously; The electric ballast that integrates starter, ballast function is arranged in addition, and in use there is electromagnetic radiation pollution in it, influences the operate as normal of part household electrical appliance, and the fragile deficiency that waits can not satisfy actual needs.

It is a kind of simple for production that the purpose of this utility model is to provide, and starter rate height reduces electric network pollution, and self performance is stable, and the life-span is long, fluorescent tube, ballast and starter self is had the resonant mode electronic starter of protective effect.

The purpose of this utility model is achieved in that

An electrolytic capacitor is in parallel with a rectifier diode, bleeder resistance simultaneously in parallel; The another electrolytic capacitor is in parallel with a rectifier diode, bleeder resistance simultaneously in parallel; After then these two parts being connected through a switching mode semistor, in parallel with another switching mode semistor and display circuit again, the circuit of formation resonant mode electronic starter.

Adopted the resonant mode electronic starter of said structure, had the following advantages:

1. can make once success of daylight lamp glow starting.Its reason is that filament has passed through abundant appropriate preheating, and filament is easy to emitting electrons; In the filament pre-heating process, the series resonant circuit that starter and ballast constitute applies voltage oscillation to the fluorescent lamp two ends, helps the fluorescent lamp conducting; When filament pre-heating finished, the resonance potential that starter and ballast produce reached maximum and is higher than supply voltage, finally punctures fluorescent lamp, realized once success of starter.

2. because starter and inductance type ballast produce series resonance; its resonance potential increases with the increase of sine ac power supply absolute value of voltage in each half cycle; under the situation of the abundant preheating of filament; a certain moment glow starting fluorescent lamp in the supply voltage uphill process; starter is " soft " relatively; the protection fluorescent tube, prolonging lamp tube service life has reduced the pollution of start-up course to electrical network.

3. finish the starter process; because of brownout; fluorescent tube or ballast former thereby can not glow starting fluorescent lamp time the, starter internal circuit can automatic disconnections (the low more required time of voltage is long more) in 0.5～5 second, thus protection fluorescent tube, ballast and electronic starter self.

4. can keep the minimum voltage of conducting with reference to the fluorescent tube of different capacity, the lower limit of the operating voltage range of design starter, realize daylight lamp glow starting success under the relatively low pressure, the partial sun light lamp that other type starter of starter can not starter under same voltage (comprising normal voltage and the relatively low pressure) condition.

Below in conjunction with accompanying drawing the utility model is described further.

Fig. 1 is the circuit diagram of resonant mode electronic starter;

Fig. 2 is the connecting circuit figure of the utility model and fluorescent lamp, inductance type ballast.

Wherein: PTC, PTC '-semistor (switching mode)

C1-capacitor (current limliting)

C2, C3-electrolytic capacitor

R1-resistance (current limliting)

R2, R3-resistance (releasing)

D1, D3, D4, D5-rectifier diode

D2-light-emitting diode (redness)

The K-switch

The L-inductance type ballast

The R-fluorescent tube

The S-filament

Referring to Fig. 1, electrolytic capacitor C2 is in parallel with rectifier diode D4, bleeder resistance R2 simultaneously in parallel; Electrolytic capacitor C3 is in parallel with rectifier diode D5, bleeder resistance R3 simultaneously in parallel; Then these two parts are together in series through a switching mode semistor PTC, in parallel with another switching mode semistor PTC ' and display circuit again, the circuit of formation resonant mode electronic starter; All elements are welded in to be fixed in internal diameter behind the circuit board be 20mm, external diameter is 21mm, is in the cylinder engineering plastics shell of 35～50mm deeply, constitutes electronic starter, inserts in the starter socket and uses.Wherein capacitor C1 and diode D1, D2, D3 and resistance R 1 constitute the display circuit of starter, and its effect is:

1. indicator light is bright and fluorescent lamp is not worked, and deenergization is answered in prompting;

2. from being preheating to starter, indicator light is by secretly getting brighter;

3. the energized rear indicator light does not work, and fluorescent lamp does not also have the starter sign, the prompting open filament.

Referring to Fig. 2, the starter process of resonant mode electronic starter is divided into warm-up phase and ignition stage.

1. warm-up phase: inductance type ballast L, switching mode semistor PTC ' and filament S constitute preheat circuit, Closing Switch K, energized, filament S preheating, through 1～2 second, PTC ' reaches Curie point, PTC ' open circuit, preheat circuit quits work.(PTC ' this moment resistance reach tens of megaohms, can regard open circuit as)

2. ignition stage: inductance type ballast L, capacitor C2, C3 and switching mode semistor PTC constitute starting circuit, change along with preheat circuit PTC ' resistance, starting circuit is started working, inductance type ballast L and capacitor C2, C3 produce series resonance, apply voltage oscillation to lamp tube ends, and final the generation is higher than the two ends that power source voltage puts on fluorescent tube R, thereby glow starting fluorescent lamp, through 0.5～1 second, PTC reached Curie point, the fluorescent lamp steady operation.

The technical solution of the utility model also can be used for other starter with the gaseous discharge lamp of inductance type ballast current limliting.

Claims

1. resonant mode electronic starter is characterized in that: an electrolytic capacitor (C2) is in parallel with a rectifier diode (D4), and a bleeder resistance (R2) simultaneously in parallel; Another capacitor (C3) is in parallel with a rectifier diode (D5), a bleeder resistance (R3) simultaneously in parallel; Then with these two parts through after a semistor (PTC) series connection, in parallel with another semistor (PTC ') and display circuit again, constitute the circuit of resonant mode electronic starter.

2. a resonant mode electronic starter as claimed in claim 1 is characterized in that: the display circuit of capacitor (C1) and diode (D1), (D2), (D3) and resistance (R1) formation starter.