CN2031593U - Electronic ballast for fluorescent lamp - Google Patents

Abstract

The utility model discloses an electron ballast for daylight lamps, which belongs to the circuit element device in illumination devices. The utility model provides an electron line ballast with high efficiency, power saving, small size, light weight, successful primary starting, high luminous efficiency, without flickering phenomenon, without alternating current buzz and good starting performance under the conditions of low temperature and low voltage. The electron ballast for daylight lamps comprises a rectifier, an inductance type pulse-oscillating circuit, a resonating circuit and an absorbing circuit. The electron ballast for daylight lamps starts the daylight lamp through the high voltage pulse generated when the power supply is switched on, and then utilizes small current to maintain the normal work of the daylight lamp; the service life of the daylight lamp tube can be prolonged for 2-3 times; one electron ballast can be connected with a plurality of daylight lamps.

Description

Electronic ballast for fluorescent lamp

The utility model is the circuit element setting in the lighting device.

The ballast of using on the fluorescent lamp mostly is to adopt inductance type ballast at present, owing to adopt big choking-winding and go here and there in circuit consume electric power when fluorescent lamp is worked always.Volume is big, and heaviness exist to exchange hum, under the situation of or brownout low in room temperature, is difficult for lighting, and influences the life-span of fluorescent lamp, and luminous efficiency is low.

Task of the present utility model provides that a kind of efficient, economize on electricity, volume are little, in light weight, a starter success and luminous efficiency height, and the flicker free phenomenon does not have the hum of interchange, the good electric ballast of starting performance under the low temperature low voltage condition.

Design philosophy of the present utility model is to adopt electronic circuit to produce the high pressure light pulse to start fluorescent lamp work, keeps fluorescent lamp work with little electric current then.

Solution of the present utility model can further describe with accompanying drawing 1: rectifier among the figure (1) is a diode bridge rectifier circuit, supplies with the DC power supply of electronic circuit.Oscillating circuit (2) adopts 2 NPN pliotrons to form the inductance type pulse oscillators, when power connection moment, and BG ₂Be in cut-off state, power supply is through R ₆To C ₅Charging is when the b point voltage is raised to diac D ₆During conducting, offer BG ₂Forward bias voltage of base stage, BG ₂By by the end of conducting, BG ₂By load L ₃, C ₄, L ₄, C ₆R ₇To high-voltage pulse of fluorescent lamp output, fluorescent lamp just can be lighted.BG ₂BG during conducting ₁Be in cut-off state, because BG ₂Conducting make a point voltage anxious according to decline, in addition because L ₁, L ₂And L ₃On same magnet ring, L ₃On voltage induced to L ₁Go up to BG ₁Base stage provides a forward bias voltage, makes BG ₁By by the end of conducting, this moment, the decline of a point voltage made b point also descend thereupon, arrived D ₆BG when ending ₂End by being conducting to, so repeatedly, BG ₂And BG ₁In turn conducting make BG ₂Be output as a rectangular pulse.Require BG during design circuit ₂The pulse duty factor of output greater than 5:1 to reach economize on electricity and to prolong life-span of fluorescent tube.

C in the circuit ₄Be partiting dc capacitor and and L ₄Constitute pulse resonance circuit (3) and guaranteed that pulse amplitude is enough to start fluorescent lamp work.

C ₆, R ₇Be a resistance capaciting absorpting circuit (4), play the effect of protection fluorescent lamp.

Diac D in the circuit ₆Adopt N413.

The starting resistor of the utility model output is the higher 600V that reaches of rectangle spike and amplitude, thereby improved the reliability that starts fluorescent lamp, the time from power connection to a fluorescent lamp of can accomplishing was less than 3 seconds, and it is luminous even, the build-up of luminance characteristic is good under low-temp low-pressure, the flicker free phenomenon does not have the hum of interchange.

The utility model compared with prior art has the luminous efficiency height, saves electric energy, and starting performance is good under low temperature (more than 25 °) low pressure (more than the 130V) situation, can prolong fluorescent tube 2-3 in useful life doubly.

Exemplary embodiments of the present utility model adopts following components and parts:

D ₁－D ₅： 1N4006 1A／800V

D ₆N413 25V±10％

R ₁－R ₂220KΩ

R ₃，R ₅，R ₉2－5Ω

R ₈510K

R ₄R ₆8－10Ω

C ₁，C ₂10μf

C ₃，C ₅3300pf－4700pf

C ₄0.033μf

C ₆0.047μf

L ₁L ₂With L ₃The number of turns than for 2:5

The utilization condition: 1. voltage is 130V-242V 50HZ

2. fluorescent tube 15W-40W

3. room temperature-25 is °-45 ℃

Can reach technical indicator: 1. luminous efficiency＞50 lumens/W

2. power factor 〉=0.9

3. start-up time＜3 second, one-shot point fluorescent lamp

The utility model is a kind ofly can energy-conservationly can improve luminous efficiency again in a word, the build-up of luminance performance is good in the low-temp low-pressure situation, can also overcome compare with the inductance type ballast that uses at present in scintillation and the service life that exchanges noise and extended day light lamp tube in light weight, volume is little, price is low, can connect many fluorescent lamps with an electric ballast simultaneously, be present comparatively ideal ballast.

Claims (3)

1, a kind of electronic ballast for fluorescent lamp comprises rectifier (1), oscillating circuit (2), resonant circuit (3), absorbs circuit (4), it is characterized in that:

1. oscillating circuit (2) adopts 2 NPN pliotron BG ₁, BG ₂Form an inductance type oscillator, by diac D ₆Trigger and by by the end of conducting BG ₂The output pulse by load L ₃, C ₄L ₄, C ₆R ₇Light BG to fluorescent lamp ₁, BG ₂Conducting is to keep fluorescent lamp work in turn;

2. resonant tank (3) is by C ₄, L ₄Be composed in series, effect is to improve pulse amplitude, C ₄Also play the stopping direct current effect;

3. absorb circuit (4) by R ₇C ₆Form, fluorescent lamp is shielded.

2, electronic ballast for fluorescent lamp as claimed in claim 1 is characterized in that: L in the described oscillator (3) ₁, L ₂, L ₃Be on same magnet ring, to guarantee BG ₂With BG ₁Conducting in turn, L ₁L ₂With L ₃Winding ratio be 2:5.

3, electronic ballast for fluorescent lamp as claimed in claim 1 is characterized in that said diac D ₆Adopt N413.

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