CN2210509Y

CN2210509Y - High frequency power suply for fluorescent lamp

Info

Publication number: CN2210509Y
Application number: CN 94216300
Authority: CN
Inventors: 万如俊
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-30
Filing date: 1994-06-30
Publication date: 1995-10-18
Anticipated expiration: 2004-06-30

Abstract

The utility model relates to a high frequency power supply for fluorescent lamp, relating to a glow starter for fluorescent lamp, comprising an anti-interference circuit, a rectifying filter circuit, a self-excited oscillation circuit, an inverter circuit and a load circuit. Owing to the adoption of the inverter circuit, the high frequency power supply can simultaneously switch on a fluorescent lamp or a plurality of fluorescent lamps; besides, device parameter does not need adjusting. The utility model has the advantages of small size, no flickering phenomenon, no pollution for electric network, low cost, convenient operation, safety, etc. The utility model is very suitable for places which need illumination in large areas such as factories, schools, markets, guesthouses, etc.

Description

The fluorescent lamp high frequency power supply

The utility model relates to a kind of igniter that is used for discharge lamp, especially relates to a kind of fluorescent lamp starter device.

The fluorescent lamp starter device that uses has two kinds at present: inductance type ballast and electric ballast.The inductance type ballast heaviness consumes a large amount of copper material and steel, and power consumption is also big.Existing electric ballast can only drive one or two fluorescent lamps, can not drive many fluorescent lamps, because of the operating frequency and the electric current of every fluorescent lamp all different, existing electric ballast can't be for every fluorescent lamp provides normal separately operating frequency and electric current when driving many fluorescent lamps, thereby can't guarantee that every fluorescent lamp can both normally be gone up and do.

The purpose of this utility model is to provide a kind of can drive one or several fluorescent lamps simultaneously, and needn't adjust the fluorescent lamp high frequency power supply that the power consumption of device parameters is low, save material.

The purpose of this utility model is achieved in that the utility model is made up of anti-jamming circuit, current rectifying and wave filtering circuit, self-maintained circuit, inverter circuit and load circuit, capacitor C 7 in the inverter circuit and capacitor C 8 series connection, the common port of the collector electrode of one termination triode BG1 of capacitor C 7 and the output of diode D3, the input of one terminating diode D4 of capacitor C 8, the public point of capacitor C 7 and capacitor C 8 connect an electrode of the fluorescent lamp in the load circuit.

The utility model then can drive one or several fluorescent lamps simultaneously, and need not to adjust device parameters owing to adopted inverter circuit.The utlity model has no stroboscopic, do not pollute electrical network, volume is little, cost is low, advantage such as esy to use, safe and reliable.

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

The utility model is made up of anti-jamming circuit 1, current rectifying and wave filtering circuit 2, self-maintained circuit 3, inverter circuit 4 and load circuit 5.The alternating current input anti-jamming circuit 1 of 220v, extraneous and the inner Harmonic Interference that produces of filtering, the alternating current of exporting the 220v of stable 50Hz is added to two inputs of filter circuit 2, the output galvanic current is pressed after current rectifying and wave filtering circuit 2 rectifications, filtering, self-maintained circuit 3 produces the wave of oscillation, inverter circuit 4 produces the positive and negative high frequency voltage that replaces, starter fluorescent lamp at the two ends of load circuit 5.

Anti-jamming circuit 1 is made up of two inductance L 1, L2 and two capacitor C 1, C2.The alternating current of the input termination 220v of inductance L 1, L2, capacitor C 1, the C2 of two series connection in parallel between the output of inductance L 1, L2.

Current rectifying and wave filtering circuit 2 is made up of rectifier ZL and capacitor C 3.Capacitor C 3 is a polar capacitor, strobes.Two inputs of rectifier ZL connect the common port of capacitor C 1 and inductance L 1 and the common port of inductance L 2 and capacitor C 2 respectively, the output of rectifier ZL connects the common port of capacitor C 1, C2, and the two ends of capacitor C 3 are connected in parallel between two outputs of rectifier ZL.

Self-oscillation electric capacity 3 is by two triode BG1, BG2, three capacitor C 4, C5, C6, and three inductance L 3, L4, L5, six resistance R 1, R2, R3, R4, R5, R6, diode D1 and diac D2 form.Be connected in parallel on the two ends of capacitor C 3 after capacitor C 4, the C5 series connection, the common port of capacitor C 4, C5 connects the input of inductance L 3, connects the output of diode D1 after the output of inductance L 3 is connected with resistance R 2.Also be connected in parallel on the two ends of capacitor C 3 after resistance R 1 and capacitor C 6 series connection, the common port of resistance R 1 and capacitor C 6 connects the input of diode D1 and the end of diac D2.The other end of diac D2 connects the base stage of triode BG2, the base stage of triode BG2 is with after resistance R 4, inductance L 5 are connected, the other end of inductance L 5 connects the emitter of negative terminal triode BG2 of capacitor C 3 with after resistance R 6 is connected, and the other end of resistance R 6 links to each other with the negative terminal of capacitor C 3.The base stage of triode BG1 is with after resistance R 3, inductance L 4 are connected, the output of another terminating diode D1 of inductance L 4, the emitter of triode BG1 is with after resistance R 5 is connected, and its end of public affairs of the collector electrode of the other end of resistance R 5 and triode BG2 and the output of diode D1 link.Three inductance L 1, L2, L3 constitute a feedback transformer on same magnet ring.

Inverter circuit 4 is by two triode BG1, BG2, two capacitor C 7, C8, and two diode D3, D4 form, and wherein two triode BG1, BG2 are that self-maintained circuit 3 and inverter circuit 4 are common.After two diode D3, D4 forwards are connected, the collector electrode of the output termination triode BG1 of diode D3, the negative terminal of the input termination capacitor C 3 of diode D4, the collector electrode of the public termination triode BG2 of diode D3, D4 series connection.Be connected in parallel on after two capacitor C 7, the C8 series connection between the input of the output of diode D3 and diode D4.Two diode D3, D4 shield.

Load circuit 5 is made up of as the branch road that inductance L 6, capacitor C 9 and fluorescent lamp L constitute jointly one or several.One of inductance L 6 terminates on the common port of two diode D3, D4 series connection, every end of fluorescent lamp L has two electrodes, an electrode of the end of another termination fluorescent lamp L of inductance L 6, capacitor C 9 is connected in parallel on each electrode at two ends of fluorescent lamp L, and the surplus next electrode of fluorescent lamp L connects the public point of two capacitor C 7, C8 series connection.

The alternating current of 220v is through the effect of anti-jamming circuit 1, the filtering operating frequency is other harmonic components beyond the 50Hz, the alternating current of exporting a single-frequency and be the 220v of 50Hz is added on two inputs of rectifier ZL, and through rectifier ZL rectification, output one galvanic current is pressed after capacitor C 3 filtering.The resistance R 1 of electric current in self-maintained circuit 3 is to capacitor C 6 chargings, producing a sawtooth pulse is added on the diac D2, when pulse voltage reaches the puncture voltage of diac D2, forming a narrow current impulse is added on the base stage of triode BG2, impel triode BG2 conducting, under the feedback effect of inductance L 1, L2, L3, two triode BG1, BG2 take turns conducting, end, two capacitor C 4, C5 are discharged and recharged in turn, form stable vibration.Owing to the in turn conducting of two triode BG1, BG2, end, electric current also discharges and recharges two capacitor C 7, C8 in turn by load circuit 5, produce the positive and negative high frequency voltage that replaces and be added in the two ends of the capacitor C 9 in the load circuit 5, capacitor C 9 and inductance L 6 have the series resonance effect, supply with the filament pre-heating electric current of fluorescent lamp L, the high pressure at capacitor C 9 two ends is lighted fluorescent lamp L.After fluorescent lamp L lights, inductance L 6, capacitor C 9 off resonances, L6 restraint of labour electric current makes fluorescent lamp L operate as normal.

Claims

1, a kind of fluorescent lamp high frequency power supply, comprise anti-jamming circuit (1), current rectifying and wave filtering circuit (2), self-maintained circuit (3), inverter circuit (4) and load circuit (5), it is characterized in that: the electric capacity (C7) in the inverter circuit (4) is connected with electric capacity (C8), the common port of the collector electrode of one termination triode (BG1) of electric capacity (C7) and the output of diode (D3), the input of one terminating diode (D4) of electric capacity (C8), the public point of electric capacity (C7) and electric capacity (C8) connects an electrode of the fluorescent lamp (L) in the load circuit (5).