CN2109687U

CN2109687U - Module high frequency electron ballast

Info

Publication number: CN2109687U
Application number: CN 91232407
Authority: CN
Inventors: 王洪乐
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-21
Filing date: 1991-12-21
Publication date: 1992-07-08

Abstract

The utility model belongs to a working part in a lighting circuit. The scheme provides a novel module type high-frequency electronic ballast which is composed of an electronic oscillation circuit, parts of elements are compressed and molded into a module, and the oscillation circuit of the utility model is composed of a bridge rectifier and a triode multivibrator connected with the bridge rectifier in series. A divider circuit is arranged between a triode emitting electrode and a collector, oscillation elements of capacitance, resistance and induction are arranged between the emitting electrode and a base electrode, and two tandem connection points of a triode are connected with an L 3 filament and a C 4 circuit in series. Except the triode and a smoothing capacitor, the other elements of the scheme are compressed and molded in the module, and the utility model has the advantages of easy starting, stable operation, energy saving and long service life.

Description

Module high frequency electron ballast

The utility model belongs to the workpiece on a kind of lighting circuit, and it relates to a kind of structure of electric ballast.

As everyone knows, the fluorescent lamp polygamy that uses is with the Inductive ballast of common low frequency 50HZ, because its coil turn is many, iron core is big at present, the resistance heating of coil during its work, the eddy-current heating of iron core, it is bigger to form this kind ballast energy loss, and general loss is 4～8 watts.It is equivalent to 20% of 40W fluorescent tube consumed power, will account for 67% concerning the fluorescent tube of 6W.Adopt high-frequency electronic ballast point fluorescent lamp to have remarkable energy saving effect in order to reduce loss.Existing electric ballast includes magnet ring pulse transformer and bidirectional diode circuits for triggering, it has easy startup, no stroboscopic, advantage such as in light weight, but also has the deficiency of the shock effect lamp tube service life that produces high-frequency harmonic interference signal and peak pulse electric current.

The purpose of this utility model is to provide a kind of novel high-frequency electronic ballast device, it removes magnet ring pulse transformer and the bidirectional diode circuits for triggering that electric ballast contains in the prior art, but the capacitor charge and discharge in the employing multi-resonant oscillating circuit provides high-frequency ac current to fluorescent tube, and it has the advantage of easy startup, working stability and fluorescent tube long service life.

By as above design, the feature of the high-frequency electronic ballast that is applicable to the modular on the fluorescent tube that this programme provided is: it is made up of the high-frequency electronic oscillating circuit and subelement is injection molded into a module.Its high-frequency electronic oscillating circuit includes rectifying part and multivibrator part.Its rectifying part adopts bridge rectifier D3～D6 and has filter capacitor C1 and resistance R.Its multivibrator is made up of the triode and the peripheral cell of two series connection, its utmost point of each pipe all be connected to one by collector electrode to the voltage divider the emitter, this voltage divider all also has the diode of a Control current direction.Two voltage dividers are respectively R1R3D1 and R5R4D2, all go here and there the oscillating element L1R2C2 and the L2R6C3 of resistance, inductance, electric capacity between the emitter of each pipe and the base stage, collector electrode termination rectification output cathode after two or three utmost point pipe collector and the emitter series connection, and emitter termination rectification output negative pole, the serial connection point of two triodes and rectification output negative pole shunt capacitance C5 are with the L3 filament Cx filament and the C4 that is connected in series anodal in parallel of rectification output.

Compression moulding module in this programme is to adopt resin dosing equipment, and the subelement in the module has comprised rapid wear not, the element that caloric value is little, and other all elements all within it the electric capacity except that between two triodes, filter capacitor and two filaments.

Adopt this programme can embody following superiority: 1. this programme employing be in the multi-harmonic-oscillations electric capacity discharge and recharge the startup fluorescent tube, no peak pulse rush of current helps lamp tube service life and extends; 2. its is intuitively gone up and starts slowly (about 1 second), but working stability, no stroboscopic, noiseless, state no interference signal; 3. this programme has reduced the energy loss of inductive part, and remarkable energy saving effect is arranged; 4. ballast makes modular form and can avoid the influence of vibration factor to work quality, can prolong the life-span of whole device; 5. it is simple in structure, in light weight, cost is low, is easy to make and promote.

Fig. 1 is the schematic diagram of the electronic oscillating circuit of this programme modular high-frequency electric ballast.

Fig. 2 is the circuit diagram of inside modules.

Fig. 3 is the complete machine assembly drawing.

Operation principle below in conjunction with description of drawings this programme.The electric main of 220V becomes the pulsating direct current of 100HZ behind D3～D6 bridge rectifier, again by being output as 300V direct current stably after the C1 filtering.This direct current the moment of energized make electric current through positive source through C4, filament, Cx, filament, L3, R5, C3, R6, L2 to power cathode, C3 is charged, BG2 base potential Ub2 increases, and BG2 conducting when Ub2 reaches certain value makes C4 be full of electric charge (left side is positive right negative).After the BG2 conducting, C3 begins discharge, and Ub2 descends, and makes BG2 withdraw from saturated and ends.Because L1 is opposite with the L2 phase place, along with the decline of Ub2 is risen Ub1, make BG1 enter the saturation condition of conducting very soon, the positive charge of C4 left end is got back to the right-hand member of C4 through BG1, L3, filament at this moment.The Ub2 of Ub1 decline meanwhile rises, and work returns to initial state, forms a period of oscillation, and after this vibration goes down the alternating current of high frequency then is provided for fluorescent tube again and again.

Have only 3～4 elements outside the module of this programme, adopt modular form can improve the stability and the reliability of product, between 8W～40W fluorescent tube, adopt unified circuit, only change a little the number of turn of L3.Wherein triode to adopt DU406, C4 be that 6700P(is if fluorescent tube is that electricity-saving lamp then can save), C2, C3, be 2 μ F, C5, CX are 1000PF, D1, D2 are 1N4007.The fluorescent lamp range estimation brightness of this programme assembling is identical with common ballast brightness, but obvious power savings is arranged.Total energy consumption was 48W when the 40W fluorescent tube was adorned common ballast, and this programme energy consumption is 39.2W, can economize on electricity 22%.

Claims

1, a kind of high-frequency electronic ballast that is applicable to the modular of fluorescent tube, it is characterized in that it is made up of the high-frequency electronic oscillating circuit and part is compression molded into a module, its high-frequency electronic oscillating circuit includes rectifying part and multivibrator part, its rectifying part adopts bridge rectifier D3～D6, and has filter capacitor C1 and resistance R; Its multivibrator is made up of the triode and the peripheral cell of two series connection, the base stage of each pipe all be connected to one between collector and emitter and have voltage divider R1R3D1 and a R5R4D2 that the diode of Control current direction is formed, all go here and there the oscillating element L1R2C2 and the L2R6C3 of resistance inductance capacitance between the emitter of each pipe and the base stage, collector electrode termination rectification output cathode after two or three utmost point pipe collector and the emitter series connection, emitter termination rectification output negative pole, shunt capacitance C5 between the serial connection point of two triodes and rectification output negative pole L3 filament CX filament and the C4 that is connected in series with the positive interpolar parallel connection of rectification output.

2, according to the described high-frequency electronic ballast of claim 1, it is to irritate in the aforementioned structure whole elements the electric capacity except that between filter capacitor, two triodes and tube filament with the resin envelope that the part that it is characterized in that it makes the compression moulding module.