CN201174814Y - Dual-purpose type electronic ballast - Google Patents

Abstract

The utility model relates to a compatible-type electronic ballast; a gamma type filter circuit, a bridge type full wave rectifying circuit and a current chasing circuit are connected in a circuit in sequence; an inverting circuit is provided with a passive half-bridge circuit consisting of a capacitor and an active half-bridge circuit consisting of a pilot conducting switch audion and another switch audion 13003; a resistor on the base electrode of the switch audion is 51 omega; a resistor on the emitting electrode of the pilot conducting switch audion is 1.8 omega; a resistor on the emitting electrode of another switch audion is 1.5 omega; a magnetic ring transformer has four circles of a primary winding and two secondary windings respectively on a magnetic ring with a magnetic inductivity of 2300 or has two circuits of the primary winding and two secondary windings respectively on the magnetic ring with the magnetic inductivity of 7000; and the output end of the bridge type full wave rectifying circuit is connected with a high-frequency filter capacitor in parallel. When the active half-bridge circuit is designed, the electronic ballast reasonably selects parameters of elements and can drive the common 36 W and 40 W fluorescent light tubes and a T8 type highly-efficient energy-saving fluorescent light tube of 36W.

Description

A kind of dual-purpose type electric ballast

Technical field

The utility model relates to a kind of 36～40W fluorescent tube electric ballast, particularly a kind of 36～40W fluorescent tube circuit of electric ballast.

Background technology

Fluorescent lamp is a low pressure mercury lamp, two filaments are housed in the fluorescent tube of fluorescent tube, scribble electronic emission material on the filament, under the alternating voltage effect, filament is alternately as negative electrode and anode, in fluorescent tube, form electric field, be filled with argon gas and a spot of mercury of 400Pa-500Pa pressure in the fluorescent tube, tube inner wall scribbles fluorescent material, after the energising, liquid mercury flashes to the mercury vapour that pressure is 0.8Pa, under electric field action, mercury atom constantly is provoked into excitation state from reset condition, and spontaneous transition is to ground state then, and giving off the ultraviolet ray of wavelength 253.7nm, fluorescent material sends visible light after absorbing ultraviolet radiant energy.

The fluorescent material difference is sent the effect difference of light.The fluorescent material of early stage conventional fluorescent lamps pipe is the calcium halophosphate activated by antimony andmanganese powder, calcium halophosphate activated by antimony andmanganese powder low price, but luminous efficiency is not high enough, and the fluorescent material of recent efficient energy-saving fluorescent lamp pipe is the rare earth element three primary colors fluorescent powder, its luminous efficiency height.

Because the voltage-current characteristic of fluorescent tube, fluorescent tube is wanted the adapted ballast in use, and the fluorescent tube of different qualities needs the different ballast of adapted.Ballast has Inductive ballast and electric ballast.

Electric ballast has housing, and circuit board is arranged in the housing, and circuit of electronic ballast is arranged on the circuit board.At " principle of electronic energy-saving lamp and electric ballast and manufacturing " (Chen Chuanyu work, People's Telecon Publishing House's in August, 2004 front page of China) in the book, the principle and the circuit of electric ballast have been told about, filter circuit, rectification circuit and inverter circuit that circuit of electronic ballast can have order to link to each other.For 36～40W fluorescent tube circuit of electronic ballast, the Γ mode filter that filter circuit can be made up of filter inductor and capacitor, rectification circuit can be the full-wave bridge rectifier circuit that current follow-up circuit is arranged, the input of full-wave bridge rectifier circuit has the input contact, inverter circuit can be a half-bridge inversion circuit, half-bridge inversion circuit is by the passive half-bridge of being made up of a capacitor and two active half-bridge circuits that switch triode is formed, active half-bridge circuit also has by resistance, capacitor, circuits for triggering that diac is formed and the freewheeling circuit of forming by resistor-capacitor, the output of circuits for triggering links to each other with the base stage of first conducting switch triode, the mid point of active half-bridge circuit is connected with the ballast inductance coil by the elementary level winding of magnetic ring transformer, the other end of ballast inductance coil and the mid point of passive half-bridge circuit are pair of output, two switch triodes of active half-bridge circuit have the base resistance that matches respectively, emitter resistance and magnetic ring transformer, magnetic ring transformer has elementary winding and two that link to each other with the base resistance of first conducting switch triode and another switch triode respectively utmost point windings, circuit of electronic ballast starts capacitor in addition, and the two ends that start capacitor are that another is to output.

Circuit of electronic ballast as the driving fluorescent lamp pipe, not only want energy-saving effect obvious, electromagnetic interference to other electric equipment is little, anti-electromagnetic interference is good, energy-saving safety, prerequisite characteristics such as long service life also need to adapt to the characteristic of the fluorescent tube that it drives, accomplish that drive circuit and load circuit are complementary, promptly a kind of fluorescent tube wants adapted to have circuit of electronic ballast special and that this fluorescent tube is complementary.36W, 40W conventional fluorescent lamps pipe and T8 type 36W efficient energy-saving fluorescent lamp pipe are the more fluorescent tubes of present consumption.36W, 40W conventional fluorescent lamps pipe need be used different electric ballasts with T8 type 36W efficient energy-saving fluorescent lamp pipe, the switch triode of active half-bridge two arms of different electric ballasts, the base resistance of switch triode circuit, emitter resistance, magnetic ring transformer, passive half-bridge capacitor, startup capacitor have different parameters with the ballast inductance coil.In the prior art, there is not the electric ballast of 36W, 40W conventional fluorescent lamps pipe and T8 type 36W efficient energy-saving fluorescent lamp pipe dual-purpose.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned deficiency, to propose a kind of 36W, 40W conventional fluorescent lamps pipe and T8 type 36W efficient energy-saving fluorescent lamp pipe dual-purpose type electric ballast.

The utility model is realized with the following method.

The dual-purpose type electric ballast has housing, circuit board is arranged in the housing, circuit of electronic ballast is arranged on the circuit board, the filter circuit that circuit of electronic ballast has order to link to each other, rectification circuit and inverter circuit, the Γ mode filter that filter circuit is made up of filter inductor and capacitor, rectification circuit has full-wave bridge rectifier circuit and current follow-up circuit, the input of full-wave bridge rectifier circuit has the input contact, inverter circuit has half-bridge inversion circuit, passive half-bridge and two active half-bridge circuits that switch triode is formed that half-bridge inversion circuit is made up of the capacitor that is 8N2J/630V by a capacitance, active half-bridge circuit has circuits for triggering and freewheeling circuit, the output of circuits for triggering links to each other with the base stage of first conducting switch triode, two switch triodes of active half-bridge circuit have the base resistance that matches respectively, emitter resistance and magnetic ring transformer, magnetic ring transformer has elementary winding and two that link to each other with the base resistance of first conducting switch triode and another switch triode respectively utmost point windings, the mid point of active half-bridge circuit is connected with the ballast inductance coil that inductance value is 1.6～1.8mH by the elementary winding of magnetic ring transformer, the other end of ballast inductance coil and the mid point of passive half-bridge circuit are pair of output, it is the startup capacitor of 5N6J/1500V that circuit of electronic ballast also has capacitance, the two ends that start capacitor are that another is to output, above-mentioned first conducting switch triode and another switch triode are 13003 switch triodes, the base resistance of two switch triodes all is 51 Ω, the emitter resistance of elder generation's conducting switch triode is 1.8 Ω, the emitter resistance of another switch triode is 1.5 Ω, magnetic ring transformer be elementary winding on the magnet ring of permeability 2300 and two secondary winding magnetic ring transformer that is respectively four circles or on the magnet ring of permeability 7000 elementary winding and two magnetic ring transformers that secondary winding is respectively two circles, be parallel with HF filtering capacitor at the output of full-wave bridge rectifier circuit.

During use, the input contact is linked to each other with civil power, a pair of output contact is extremely linked to each other with one of fluorescent tube two ends filament respectively, another is extremely linked to each other with another of fluorescent tube two ends filament respectively to output contact.

Input circuit of the present utility model adopts the Γ mode filter, add current follow-up circuit behind the full-wave rectifying circuit of rectification circuit, the output of rectification circuit adds the high frequency filtering capacitor, active half-bridge circuit has freewheeling circuit, during use, can filter the high order harmonic component that half-bridge circuit produces, eliminate the interference of the utility model to electrical network, also can filter higher Harmonics in Electric Power Network, eliminate higher Harmonics in Electric Power Network, improve the power factor of circuit interference of the present utility model; Passive half-bridge adopts the mutation form, replace the effect of two arm capacitors with a capacitor, simultaneously the capacitor that saves is connected in parallel on the output of rectification circuit, high order harmonic component, the power factor energy of raising circuit, the saving energy that leaches in the circuit is had obvious effects; The utility model is when the active half-bridge circuit of design, take into account coupling to 36W, 40W conventional fluorescent lamps pipe and T8 type 36W efficient energy-saving fluorescent lamp pipe, reasonably the parameter of selector switch triode and base resistance thereof, emitter resistance and magnetic ring transformer makes the utility model not only can drive 36W, 40W conventional fluorescent lamps pipe but also can drive T8 type 36W efficient energy-saving fluorescent lamp pipe.

The utility model power savings is obvious, and is little to the electromagnetic interference of other electric equipment, and anti-electromagnetic interference is good, and is safe in utilization, long service life.

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

Description of drawings

Fig. 1 cuts open schematic diagram according to the three-dimensional office of a kind of dual-purpose type electric ballast of invention scheme proposition of the present utility model;

Fig. 2 is the electrical schematic diagram of circuit diagram on the circuit board among Fig. 1.

Embodiment

Fig. 1, among Fig. 2, the dual-purpose type electric ballast has housing 1, circuit board 2 is arranged in the housing, circuit of electronic ballast is arranged on the circuit board, circuit of electronic ballast has input contact I and output contact O1, O2, the filter circuit LB that has order to link to each other between the input contact I of circuit of electronic ballast and the output contact O1, rectification circuit ZL and inverter circuit NB, the Γ type filter circuit that filter circuit is made up of inductance coil L1 and capacitor C8, rectification circuit has by four diode D1, D2, D3, the full-wave bridge rectifier circuit that D4 forms and by capacitor C1, D5, D6, D10, the current follow-up circuit that D11 and C2 are connected to form, the input of full-wave bridge rectifier circuit has input contact I, inverter circuit has half-bridge inversion circuit, half-bridge inversion circuit is by the capacitor C3 that is 8N2J/630V by a capacitance passive half-bridge of forming and the active half-bridge circuit that two switch triode Q1 and Q2 are arranged, active half-bridge circuit has by resistance R 1, capacitor C4, circuits for triggering that diode D7 and diac D12 form and by resistance R 2, the freewheeling circuit that capacitor C5 forms, the output of circuits for triggering links to each other with the base stage of first conducting switch triode Q2, the first conducting switch triode of active half-bridge circuit and another switch triode have the base resistance R4 that matches respectively, R3, emitter resistance R6, R5 and magnetic ring transformer T, magnetic ring transformer has elementary winding HL2 and two that link to each other with the base resistance of first conducting switch triode and another switch triode respectively utmost point winding HL3, HL1, between the base stage of elder generation's conducting switch triode and another switch triode and the emitter clamping diode D9 is arranged respectively, D8, the mid point M1 of active half-bridge circuit is connected with the ballast inductance coil L2 that inductance value is 1.6～1.8mH by the elementary winding HL2 of magnetic ring transformer, the mid point M2 of the other end of inductance coil and passive half-bridge circuit is pair of output O1, it is the startup capacitor C6 of 5N6J/1 500V that circuit of electronic ballast also has capacitance, the two ends that start capacitor are that another is to output O2, elder generation's conducting switch triode and another switch triode are 13003 switch triodes, the base resistance R4 of two switch triodes, R3 is 51 Ω, the emitter resistance R6 of elder generation's conducting switch triode is 1.8 Ω, the emitter resistance R5 of another switch triode is 1.5 Ω, magnetic ring transformer be elementary winding on the magnet ring of permeability 2300 and two secondary winding magnetic ring transformer that is respectively four circles or on the magnet ring of permeability 7000 elementary winding and two magnetic ring transformers that secondary winding is respectively two circles, be parallel with the HF filtering capacitor C7 that capacitor parameters is 4N7J/630V at the output of full-wave bridge rectifier circuit.

The model or the parameter of the relevant elements of above-mentioned circuit of electronic ballast are respectively:

L1:5mH, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11:4007, D12:DB3, C1, C2:10 μ F/250V, C4:22NJ/100V, C5:1N0J/1000V, C8:104J/400V, R1, R2:820K, permeability is 2300 magnet ring: RH8 * 5 * 3, permeability is 7000 magnet ring: RH10 * 6 * 5.

Claims (1)

1. dual-purpose type electric ballast, housing is arranged, circuit board is arranged in the housing, circuit of electronic ballast is arranged on the circuit board, the filter circuit that circuit of electronic ballast has order to link to each other, rectification circuit and inverter circuit, the Γ mode filter that filter circuit is made up of filter inductor and capacitor, rectification circuit has full-wave bridge rectifier circuit and current follow-up circuit, the input of full-wave bridge rectifier circuit has the input contact, inverter circuit has half-bridge inversion circuit, half-bridge inversion circuit is by the passive half-bridge of being made up of a capacitor and two active half-bridge circuits that switch triode is formed, active half-bridge circuit has circuits for triggering and freewheeling circuit, the output of circuits for triggering links to each other with the base stage of first conducting switch triode, two switch triodes of active half-bridge circuit have the base resistance that matches respectively, emitter resistance and magnetic ring transformer, magnetic ring transformer has elementary winding and two that link to each other with the base resistance of first conducting switch triode and another switch triode respectively utmost point windings, the mid point of active half-bridge circuit is connected with the ballast inductance coil by the elementary winding of magnetic ring transformer, the other end of ballast inductance coil and the mid point of passive half-bridge circuit are pair of output, circuit of electronic ballast starts capacitor in addition, the two ends that start capacitor are that another is to output, it is characterized in that: a capacitor parameters of passive half-bridge is 8N2J/630V, the ballast inductance coil is that inductance value is 1.6～1.8mH, starting capacitor parameters is 5N6J/1500V, elder generation's conducting switch triode and another switch triode are 13003 switch triodes, the base resistance of two switch triodes all is 51 Ω, the emitter resistance of elder generation's conducting switch triode is 1.8 Ω, the emitter resistance of another switch triode is 1.5 Ω, magnetic ring transformer be elementary winding on the magnet ring of permeability 2300 and two secondary winding magnetic ring transformer that is respectively four circles or on the magnet ring of permeability 7000 elementary winding and two magnetic ring transformers that secondary winding is respectively two circles, be parallel with the HF filtering capacitor that capacitor parameters is 4N7J/630V at the output of full-wave bridge rectifier circuit.

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