CN2305029Y

CN2305029Y - Composite ballast for fluorescent light

Info

Publication number: CN2305029Y
Application number: CN 96222011
Authority: CN
Inventors: 孟星德
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-18
Filing date: 1996-10-18
Publication date: 1999-01-20
Anticipated expiration: 2006-10-18

Abstract

The utility model relates to an electric element, particularly a composite ballast for fluorescent lamps. The main technical characteristic is that a time delay control circuit composed of an IC circuit and a relay J is arranged in the element; a starting circuit composed of a normally closed contact of the relay and an RC is controlled by the time delay circuit to obtain the action of starting lamp tubes in a plurality of circuits. The utility model has the advantages of simple structure, low producing cost, low-voltage start, long service life of the lamp tubes, reliable performance, etc.

Description

A kind of fluorescent lamp combined type ballast

The utility model relates to a kind of electric elements, especially a kind of fluorescence combined type ballast.

At present, at home and abroad the fluorescent-lamp-use rectifier of extensively supplying on the market mostly is inductance type ballast and high-frequency electronic ballast, but this ballast has the production cost height, unreliable and the fluorescent tube of performance is easily aging, and easy shortcoming such as breaking out of fire causes the difficulty of working and learning to the user.

The purpose of this utility model is to provide a kind of energy low-voltage starter, power frequency work, long service life, the fluorescent lamp combined type ballast of dependable performance.

The technical solution of the utility model is that the circuit design of ballast is as follows:

1,, and is connected to piezo-resistance R at power input AB termination π type filter circuit; Be used for anti-interferencely, improve power factor (PF);

2, being used to control fluorescent tube at DC termination one delay control circuit starts;

3, in CD end serial connection one inductance L;

4, be provided with one with the tube starting circuit.

As long as fluorescent tube connects, circuit can connect the stream power supply automatically during use; And delay control circuit when energising, relay J work, starter after working the effect of electrical equipment L under in the starter control circuit outage fluorescent tube that relay J normally opened contact and RC form this moment.

This circuit working principle is:

Input AC 50HZ voltage Vab is through shunt capacitance Co (raising Power Recovery), through parallel resistance (the anti-pulsation of piezo-resistance effect is disturbed) R _oAfter the output, with shunt capacitance C _r, serial connection L _IL _IIIWith shunt capacitance C _IIThe filter circuit of forming (further improving Power Recovery simultaneously).C _IIThe upper end electric current flows to that circuit is V behind fluorescent tube one end _C, at this moment, fluorescent tube connects just can produce voltage Vcd.

Vcd voltage divides two the tunnel to walk:

The first via: among the Vcd one the tunnel, Vcd is through bleeder circuit C ₁, R ₃After, give current-limiting resistance R ₂Output voltage is VAB behind four diode rectifications.After VAB voltage is given the C filter capacitor, through voltage-stabiliser tube D ₁DC power supply voltage is delivered to IC integrated package power end V after the voltage stabilizing _EfThis moment C _IC, R _ICThe delay circuit of forming is started working, and setting-up time produces V after the several seconds _GeVoltage output.The engage relay coil becomes former relay OA normally-closed contact into open circuit.

The second the tunnel: another road among the V through normally-closed contact OA, enters the C of one of starting circuit ₃The electric capacity parallel connection, R ₄, R ₅In parallel make lamp tube ends produce voltage, treat the OA normally-closed contact instant igniting fluorescent tube afterwards of opening a way with after L connect.

Also can be through two C of brilliant circuit ₄, C ₅Parallel connection, R ₆Series connection back makes lamp tube ends give constant current control and starts with after the L coil connect, treats that OA normally-closed contact open circuit back moment puts the change fluorescent tube.

The utlity model has simple in structure, dependable performance, low-voltage is held brightness, prolonging lamp tube useful life, is difficult for advantage such as breaking out of fire.

Fig. 1: be line map of the present utility model

Fig. 2: be starter line map of the present utility model

Set forth the best thin example of implementing of the present utility model below in conjunction with accompanying drawing:

As shown in the figure: shell (1) is set, in shell (1), connects the wiring board of following line construction:

A, at power supply input ab termination π type filter circuit, and at power supply input ab end and meet piezo-resistance R

B, at dc termination delay control circuit, this circuit power connects fluorescent tube heater strip one end, and the leakage resistance R of series bridge rectifier and bridge rectifier serial connection ₂And R in parallel ₃, C ₁Between reduction voltage circuit bridge rectifier output ab and connect capacitor C ₂Voltage stabilizing didoe D ₁, and and connect and have integration module IC, the indirect relay J coil of the output ec of IC.

C, in the line a control relay circuit is set, this circuit can be that the normal contact connection of relay J is by R ₆Capacitor C with parallel connection ₄, C ₅The circuit of forming, this circuit can be that the normal contact of relay J joins by C ₃, R ₄, R ₅Circuit in parallel.

Establish delay control circuit at the dc end, this circuit is provided with the current-limiting resistance R of series bridge rectifier and bridge rectifier serial connection ₂And R in parallel ₃C ₁Between bridge rectifier output terminals A B and connect capacitor C ₂, voltage stabilizing didoe D ₁, and and meet integration module IC, the indirect relay J of the output of IC; The input of IC is connected to C _ICAnd and C _ICThe R of series connection _IC

Claims

1, a kind of combined type fluorescent lamp ballast by shell (1), place the circuit (2) in the shell (1) to form, is characterized in that the line construction of wiring board (2) is:

A, at electric current input ab termination type filter circuit, and at power supply input ab end and meet piezo-resistance R;

B, at dc termination one delay control circuit;

C, in cd end serial connection one inductance L;

D, the starter circuit in parallel with fluorescent tube.

2, a kind of fluorescent lamp combined type ballast according to claim 1 is characterized in that the starter circuit is: the normally-closed contact OA series connection C of relay J ₃R ₄R ₅Parallel line.

3, fluorescent lamp combined type ballast according to claim 1 is characterized in that the starter circuit can be: the normal idle contact OA series connection of relay is by R ₆Capacitor C with parallel connection ₄C ₅The circuit of forming.

4, the compound ballast of a kind of fluorescent lamp according to claim 1, its feature is established delay control circuit at the dc end, and this circuit structure is: the current-limiting resistance R of series bridge rectifier and bridge rectifier serial connection between dc ₂And R in parallel ₃C ₁Between bridge rectifier output terminals A B and meet filter capacitor C ₂, voltage stabilizing didoe D ₁, and and meet integration module IC, the indirect relay J of output eg of IC, the input of IC is connected to C _ICAnd and C _ICThe R of serial connection _IC