CN2157651Y - Electronic ballast - Google Patents

Abstract

The utility model relates to an electronic ballast, comprising a diode voltage doubler rectifier circuit which is composed of a diodes D1 D2 and capacitance C1 C2 and a rectification current limiting circuit which is composed of diodes D1-D4 and inductance L. Fluorescent light can be initiated to work by the double power supply voltage output from voltage-doubler rectifier. The normal work of the fluorescent light is maintained by the rectification current limiting circuit after initiating. The utility model has the advantages of small size, little dissipation of energy, low price, long service life and great versatility, and a starting bulb is not needed. The inductance type ballast of the fluorescent light in the marketplace at present can be used on the inductance L.

Description

Electronic ballast

The utility model belongs to the discharge lamp electric technical field, is a kind of multiplication of voltage straight flow circuit of electronic ballast device specifically.

Existing multiplication of voltage single flow electric ballast, " the fluorescent lamp direct-acting gas combustion pressure regulator " announced such as Chinese patent 9122586.9 needs the big withstand voltage high capacitor of complexion amount, thus cause volume big, the price height." electric ballast " that Chinese patent 92207019.9 is announced is because the employing resistance R is done current limiting element, so it is higher to consume energy.

It is little that the purpose of this utility model provides a kind of volume, and power consumption is few, the electron rectifier that price is low.

The utility model circuit working schematic diagram as shown in Figure 1.It is by diode D ₁D ₂, capacitor C ₁C ₂Form two voltage doubling rectifying circuit, diode D ₁～D ₄Consist of the rectification current-limiting circuit with L, node 1 is for just when the positive half cycle of power supply, and 2 for negative, and power supply passes through diode D ₁To capacitor C ₁Charge to crest voltage, when the power-half cycle, node 1 is for negative, and node 2 is for just, and electric current passes through diode D ₂To capacitor C ₂Charge to crest voltage, output 3,2 times of power supply crest voltages of 4 outputs start fluorescent lamp G at this moment.Start rear because C ₁C ₂Capacity is littler, can not keep high pressure conditions, makes 3,4 terminal voltages be down to lamp works voltage.Power supply circuits are like this work: when 1 for just, 2 when bearing, electric current is by 1 → D ₁→ 3 → G → 4 → D ₄→ L → 2.When 2 for just, 1 when negative, and electric current is by 2 → L → D ₃→ 3 → G → 4 → D ₂→ 1.Because capacitor C ₁C ₂Capacity is little, and impedance can think that greatly the two does not participate in work substantially.Fluorescent tube G is operated in dc state.

The utility model need not joined jump bubble and fluorescent tube long service life, and wiring is simple, because the commercially available fluorescent lamp ballast that inductance L can directly be complementary with existing and fluorescent tube G, thereby have very strong versatility.

Fig. 1 is the circuit of electronic ballast fundamental diagram.

Embodiment:

The utility model comprises D ₁D ₂C ₁C ₂The two voltage doubling rectifying circuit that forms, diode D ₁～D ₄With the rectification current-limiting circuit that L consists of, D ₁～D ₄Be 1N4007 diode 1A, 1000V, C ₁Be 1mf, 400V, C ₂Be 6200pf, 400V, the two is all non-polar condenser.L is an inductance, the also available existing commercially available Inductive ballast of L, and fluorescent lamp G single line respectively is connected to 3,4 ends.Behind power supply 1, the logical civil power of 2 ends, power supply is by diode D ₁D ₂To capacitor C ₁C ₂Charging, making 3,4 terminal voltages is two times of supply voltages, fluorescent lamp G rapidly electricity is bright.Light back 3,4 terminal voltages and drop to lamp works voltage.

Claims (1)

1, a kind of electric ballast, it comprises by diode D ₁D ₂Capacitor C ₁C ₂The two voltage doubling rectifying circuit that consists of is characterized in that having increased diode D on original two voltage doubling rectifying circuit basis ₃D ₄And inductance L, by diode D ₁～D ₄, capacitor C ₁C ₂Consisted of the rectification current-limiting circuit, wherein D ₃Negative electrode link to each other D with node 3 ₃Anode and D ₄Anode connects node 4, inductance L one end and D ₃D ₄Contact 5 link to each other, the other end links to each other with power supply contact 2.

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