CN202841665U

CN202841665U - Electronic ballast circuit

Info

Publication number: CN202841665U
Application number: CN 201220444660
Authority: CN
Inventors: 朱晓峰
Original assignee: ANHUI MINGWEI ILLUMINATION EQUIPMENT Co Ltd
Current assignee: ANHUI MINGWEI ILLUMINATION EQUIPMENT Co Ltd
Priority date: 2012-09-03
Filing date: 2012-09-03
Publication date: 2013-03-27
Anticipated expiration: 2022-09-03

Abstract

The utility model discloses a ballast circuit used for an energy-saving lamp. The electronic ballast circuit includes a rectifying circuit, a filtering circuit, a starting circuit, a switching circuit and a resonance circuit. Alternating current of 220V AC is rectified and filtered through the bridge-type rectifying circuit composed of a diode D1, a diode D2, a diode D3 and a diode D4 and the filtering circuit composed of a capacitor C0, an inductor L1 and a capacitor C1 and is turned to direct current. And then the direct current flows through the 30 KHz-40 KHz high frequency switching circuit composed of a VT1, a VT2, an R3, an R4, an R5, an R6 and a magnet ring transformer. The resonance circuit is composed of an inductor L2 and a C5. When amplitude achieves a tube breakdown value, a tube starts to give out light. After the tube is started, the inductor L2 works as a choke element to control the volume of tube current, thereby stabilizing the working of the whole electronic ballast circuit. The electronic ballast circuit provided by the utility model is simple in principle, stable in tube current and reasonable in arrangement. The C0 and the L1 of the electronic ballast circuit realize an effective effect of preventing high frequency interference and the EMC (Electromagnetic Compatibility) is inhibited. A D8 and a D9 are connected to two ends of a filament of the tube, so that power loss of filament current and the electronic ballast circuit can be reduced and the service lifetime of the tube is prolonged effectively.

Description

A kind of circuit of electric ballast

Technical field

This practical CFL lighting field that relates to is specially a kind of circuit of the electric ballast for electricity-saving lamp.

Background technology

Electricity-saving lamp is a kind of of household, commercial general lighting, in the whole nation so ball all have a wide range of applications, it reaches more than 30% than traditional incandescent lamp is energy-conservation, and also before the prematurity, the CFL lighting technology also has the quite long market share in industry in following lighting technology.

Practical content

This practical purpose provides a kind of circuit of the electric ballast for electricity-saving lamp, to reach the luminous effect of power saving fluorescent lamps starter.

For achieving the above object, this practical scheme of technology of taking is:

A kind of circuit of electric ballast, it is characterized in that: include rectification circuit, filter circuit, start-up circuit, switching circuit, resonant circuit, described rectification circuit is the bridge rectifier that diode D1-D4 consists of, described filter circuit includes capacitor C 0 in parallel, C1, be connected with inductance L 1 between two nodes of capacitor C 0 and capacitor C 1, rectification circuit is in parallel with capacitor C 0, start-up circuit includes the resistance R 1 of mutual series connection, resistance R 2, capacitor C 3, Nodes between resistance R 2 and the capacitor C 3 is connected with the end of diac DB3 and the positive pole of diode D5, filter capacitor C1 and the resistance R 1 of mutually connecting, resistance R 2, capacitor C 3 parallel connections, described switching circuit includes the triode VT1 of mutual series connection, resistance R 3, triode VT2, resistance R 4, the base stage of the other end access triode VT2 of diac DB3, the negative pole of diode D5 is connected with the collector electrode of triode VT2, the base stage contact resistance R5 of triode VT1, the other end of resistance R 5 connects the end of the coil Tn1 of magnetic ring transformer T, between the collector electrode and resistance R 3 of the other end access triode VT2 of coil Tn1, the resistance R 5 of series connection, coil Tn1 is also in parallel with diode D6, the base stage contact resistance R6 of triode VT2, the other end of resistance R 6 connects the end of the coil Tn2 of magnetic ring transformer T, the other end of coil Tn2 is connected with the other end of resistance R 4, the resistance R 6 of series connection, coil Tn2 is also in parallel with diode D7, described resonant circuit includes inductance L 2, capacitor C 5, the end connecting coil Tn1 of the coil Tn3 of magnetic ring transformer T, one end connects inductance L 2, the filament of inductance L 2 access fluorescent tube LAMP, the other end of the filament of fluorescent tube LAMP is by the collector electrode of capacitor C 4 access triode VT1, the filament of fluorescent tube LAMP is in parallel with capacitor C 5, the two ends of the filament of fluorescent tube LAMP are parallel with respectively diode D8, diode D9, civil power access rectification circuit and capacitor C 0, inductance L 1, the filter circuit that capacitor C 1 consists of is through rectification, become direct current after the filtering, again through resistance R 1, R2, C3, the start-up circuit that DB3 forms, start-up circuit starts VT1, VT2, R3, R4, R5, R6, the switching circuit that magnetic ring transformer T forms, inductance L 2, C5 forms resonant circuit by tube filament, when amplitude reached the value that punctures fluorescent tube, tube starting was luminous; Behind the tube starting, inductance L 2 is stablized whole circuit working as the size of choke elements control lamp current.

The utility model has the advantages that:

The utility model circuit theory is simple, and lamp current is stable, is easy to produce, and arranges rationally; The C0 of circuit, L1 can play useful effect to High-frequency Interference, have namely suppressed the EMC electromagnetic compatibility; D8, D9 are connected in parallel on the tube filament two ends, can reduce heater current, and reduce the line power loss, effectively protect fluorescent tube, prolonging service life of lamp tube.

Description of drawings

Fig. 1 is electrical schematic diagram of the present utility model.

Embodiment

As shown in Figure 1: a kind of circuit of electric ballast, include rectification circuit, filter circuit, start-up circuit, switching circuit, resonant circuit, described rectification circuit is the bridge rectifier that diode D1-D4 consists of, described filter circuit includes capacitor C 0 in parallel, C1, be connected with inductance L 1 between two nodes of capacitor C 0 and capacitor C 1, rectification circuit is in parallel with capacitor C 0, start-up circuit includes the resistance R 1 of mutual series connection, resistance R 2, capacitor C 3, Nodes between resistance R 2 and the capacitor C 3 is connected with the end of diac DB3 and the positive pole of diode D5, filter capacitor C1 and the resistance R 1 of mutually connecting, resistance R 2, capacitor C 3 parallel connections, described switching circuit includes the triode VT1 of mutual series connection, resistance R 3, triode VT2, resistance R 4, the base stage of the other end access triode VT2 of diac DB3, the negative pole of diode D5 is connected with the collector electrode of triode VT2, the base stage contact resistance R5 of triode VT1, the other end of resistance R 5 connects the end of the coil Tn1 of magnetic ring transformer T, between the collector electrode and resistance R 3 of the other end access triode VT2 of coil Tn1, the resistance R 5 of series connection, coil Tn1 is also in parallel with diode D6, the base stage contact resistance R6 of triode VT2, the other end of resistance R 6 connects the end of the coil Tn2 of magnetic ring transformer T, the other end of coil Tn2 is connected with the other end of resistance R 4, the resistance R 6 of series connection, coil Tn2 is also in parallel with diode D7, described resonant circuit includes inductance L 2, capacitor C 5, the end connecting coil Tn1 of the coil Tn3 of magnetic ring transformer T, one end connects inductance L 2, the filament of inductance L 2 access fluorescent tube LAMP, the other end of the filament of fluorescent tube LAMP is by the collector electrode of capacitor C 4 access triode VT1, the filament of fluorescent tube LAMP is in parallel with capacitor C 5, the two ends of the filament of fluorescent tube LAMP are parallel with respectively diode D8, diode D9, civil power access rectification circuit and capacitor C 0, inductance L 1, the filter circuit that capacitor C 1 consists of is through rectification, become direct current after the filtering, again through resistance R 1, R2, C3, the start-up circuit that DB3 forms, start-up circuit starts VT1, VT2, R3, R4, R5, R6, the switching circuit that magnetic ring transformer T forms, inductance L 2, C5 forms resonant circuit by tube filament, when amplitude reached the value that punctures fluorescent tube, tube starting was luminous; Behind the tube starting, inductance L 2 is stablized whole circuit working as the size of choke elements control lamp current.

Claims

1. the circuit of an electric ballast, it is characterized in that: include rectification circuit, filter circuit, start-up circuit, switching circuit, resonant circuit, described rectification circuit is the bridge rectifier that diode D1-D4 consists of, described filter circuit includes capacitor C 0 in parallel, C1, be connected with inductance L 1 between two nodes of capacitor C 0 and capacitor C 1, rectification circuit is in parallel with capacitor C 0, start-up circuit includes the resistance R 1 of mutual series connection, resistance R 2, capacitor C 3, Nodes between resistance R 2 and the capacitor C 3 is connected with the end of diac DB3 and the positive pole of diode D5, filter capacitor C1 and the resistance R 1 of mutually connecting, resistance R 2, capacitor C 3 parallel connections, described switching circuit includes the triode VT1 of mutual series connection, resistance R 3, triode VT2, resistance R 4, the base stage of the other end access triode VT2 of diac DB3, the negative pole of diode D5 is connected with the collector electrode of triode VT2, the base stage contact resistance R5 of triode VT1, the other end of resistance R 5 connects the end of the coil Tn1 of magnetic ring transformer T, between the collector electrode and resistance R 3 of the other end access triode VT2 of coil Tn1, the resistance R 5 of series connection, coil Tn1 is also in parallel with diode D6, the base stage contact resistance R6 of triode VT2, the other end of resistance R 6 connects the end of the coil Tn2 of magnetic ring transformer T, the other end of coil Tn2 is connected with the other end of resistance R 4, the resistance R 6 of series connection, coil Tn2 is also in parallel with diode D7, described resonant circuit includes inductance L 2, capacitor C 5, the end connecting coil Tn1 of the coil Tn3 of magnetic ring transformer T, one end connects inductance L 2, the filament of inductance L 2 access fluorescent tube LAMP, the other end of the filament of fluorescent tube LAMP is by the collector electrode of capacitor C 4 access triode VT1, the filament of fluorescent tube LAMP is in parallel with capacitor C 5, the two ends of the filament of fluorescent tube LAMP are parallel with respectively diode D8, diode D9, civil power access rectification circuit and capacitor C 0, inductance L 1, the filter circuit that capacitor C 1 consists of is through rectification, become direct current after the filtering, again through resistance R 1, R2, C3, the start-up circuit that DB3 forms, start-up circuit starts VT1, VT2, R3, R4, R5, R6, the switching circuit that magnetic ring transformer T forms, inductance L 2, C5 forms resonant circuit by tube filament, when amplitude reached the value that punctures fluorescent tube, tube starting was luminous.