CN2276239Y - Multifunctional light modulating electronic ballast - Google Patents

Abstract

The utility model discloses a fluorescent lamp ballast, particularly a multifunctional electronic ballast composed of a switch light regulating device, an indication circuit and a protection and ballasting circuit. A simple driving mode is adopted in the ballasting circuit, and a rotating knob 12 can regulate the electrical inductance of an inductor L8 to make the light regulation and the power regulation realized and can drive a switch K to control a power source. When the ballast does not work, the indication circuit can light an indicating lamp 15 and at night the position of the rotary button 12 and the switch can be indicated. Flow chasing and rectification front and back filtration are adopted in the circuit, a unique trigger and protection circuit is adopted and an inductor L6 is added for enhancing the power factor and the reliability and lowering the temperature rise.

Description

Multi-functional light adjusting type electric ballast

The utility model relates to a kind of fluorescent lamp ballast, the multifunction electric sub-ballast of especially a kind of belt switch, stepless dimming, adjusting power, indicator light, protection and ballast.

Present fluorescent lamp ballast has two kinds: the one, and inductance type, the 2nd, electronic type; The advantage of inductance type is a good reliability, and cost is low; Shortcoming is that power factor is low, and temperature rise, difficulty opens brightly when having noise, temperature formula voltage low, and weight is big.The advantage of electronic type be power factor height, noiseless, temperature rise low, do not need starter, open bright fast, can be under voltage in a big way operate as normal, in light weight; Weak point is poor reliability, cost height.They all can not be regulated the brightness and the power of fluorescent lamp, and, also to establish switch in addition.

The purpose of this utility model provides a kind of advantage with inductance type and electronic ballast, integrates the electric ballast of switch, light modulation, adjusting power, indication, protection and ballast again.

For achieving the above object, the technical solution of the utility model is: with current rectifying and wave filtering circuit, circuits for triggering, frequency changer circuit and resonant circuit, make fluorescent lamp open bright and operate as normal; Consider wave circuit with filtering before and after the rectification with by stream, and trigger protection circuit and augment inductance, power factor, reliability, reduction temperature rise improved; Realize entire circuit mains switch, light modulation and adjusting power with a special switch dimmer; Thereby constitute multi-functional light adjusting type electric ballast.

After adopting this structure, change at present the problem of ballast function dullness on the market, the utility model can be in 5～40W scope stepless dimming, adjusting power; Voltage can normally open under the situation of 50～280V is bright, and, simple in structure, the power factor height, good reliability, cost is low.

Below in conjunction with accompanying drawing the utility model execution mode being done is to describe in detail in a step.

Fig. 1 cuts open the shell front view for switch dimmer of the present utility model.

Fig. 2 cuts open the shell vertical view for switch dimmer shown in Figure 1.

Fig. 3 is the circuit theory diagrams of the utility model execution mode.

Fig. 4 is the another kind of circuit theory diagrams of the utility model execution mode.

Fig. 5 is the front view of the utility model execution mode shell.

Fig. 6 is the cutaway view of bowing of execution mode shell shown in Figure 5.

Switch dimmer as depicted in figs. 1 and 2 is made up of E type magnetic core 1, I type magnetic core 4, intersection drive line 2, follower shaft 3, fixed touching plate 5, insulation holder 6, movable contact spring 7, fixed touching plate 8, coil and skeleton 9, drive sprocket axle 10 and knob 12 (as Fig. 5) thereof and shell 11.Knob 12 on the rotation drive sprocket axle 10, follower shaft 3 is made backward rotation by intersecting drive line 2, because rubbing action is moved magnetic core 1 as straight line in coil and skeleton 9, coil and skeleton 9 are motionless, and the relative position of magnetic core 1 and 4 is changed; This part is exactly the controllable impedance L in Fig. 3 circuit theory diagrams ₈After magnetic core 1 moves to magnetic core 4, contacts, to continue to move, holder 6 tops of will insulating make movable contact spring 7 separate with fixed touching plate 8, and connect with indicator light fixed touching plate 5 to power supply input movable contact spring 7.When rotary knob 12, make magnetic core 1 when the direction of leaving magnetic core 4 moves, because the elastic force effect of movable contact spring 7 recovers to connect with fixed touching plate 8, separate with fixed touching plate 5.This contact (contact) part is exactly the K switch in the circuit theory diagrams shown in Figure 3.The parts of whole switch dimmer are contained in the shell 11.

By the course of work of above switch dimmer as can be known: K switch control entire circuit power supply; When the distance of magnetic core 1 and 4 hour, inductance L ₈The inductance value maximum, the electric current of ballast and power minimum are so in the moment of Push And Release, the impulse current minimum can prolong life-span of ballast and fluorescent tube; When its distance big more, inductance L then ₈Inductance value more little, the input and output power of ballast is big more, then fluorescent tube is bright more.

Circuit theory diagrams shown in Figure 3, by rectification filter circuit, indicating circuit, triggering and protective circuit thereof, frequency changer circuit, resonant circuit and switch are formed.

Current rectifying and wave filtering circuit is by inductance L ₁And L ₂, diode D ₁～D ₇Sheng, capacitor C ₁～C ₇Constitute.Diode D ₁～D ₄And capacitor C ₁, C ₂And C ₃Constitute general bridge rectifier filter circuit, for entire circuit provides DC power supply.On the live wire of rectification circuit input, be serially connected with inductance L ₁Contact 7 and 8 with K switch is serially connected with inductance L on zero line ₂, inductance L ₁And L ₂Equal turn numbers, around on the contrary.By resistance R ₁And R ₂, and light-emitting diode DF, i.e. 15 among Fig. 5, the indicating circuit that is concatenated into, the zero line of termination rectification input, the contact 5 of another termination K switch.Diode D ₅～D ₇After the both positive and negative polarity serial connection, the negative terminal of positive termination power, negative terminal connects the anode of power supply.Electrochemical capacitor C ₄Positive pole connects power positive end, and negative pole meets diode D ₆And D ₇Tie point.Electrochemical capacitor C ₅Positive pole meets diode D ₅And D ₆Tie point, negative pole connects the negative terminal of power supply.Capacitor C ₆And C ₇Be connected to the two ends of power supply after the serial connection, wherein capacitor C ₆A termination power positive pole.Resistance R ₃One end and power cathode join, the other end and capacitor C ₈And resistance R ₄Join capacitor C ₈And resistance R ₄And the other end that connects and positive source join.Wherein, the inductance L before the rectification ₁And L ₂And capacitor C ₁Play a part anti-interference, filtering and the restriction high order harmonic component enters electrical network; By diode D ₅～D ₇And capacitor C ₄, C ₅What constitute considers wave circuit by stream, can improve power factor (PF), reduces higher-order wave content.

Triggering and protective circuit are by triode T ₁And T ₂, diode D ₈And D ₉, resistance R ₉, inductance L ₇, capacitor C ₁₃And C ₁₄Constitute.Triode T ₁Collector electrode connect capacitor C ₆And C ₇Interface point, emitter meets triode BG ₂Base stage.Triode T ₂Collector connecting transistor BG ₂Base stage, base stage connecting resistance R ₉An end, emitter connects power cathode.Resistance R ₉Another terminating diode D ₉Negative pole, diode D ₉Another termination inductance L ₇, inductance L ₇Another termination power cathode.Capacitor C ₁₃The diode D that connects of positive pole ₉Negative pole, negative pole connects the negative terminal of power supply.Anti-interference capacitor C ₁₄Positive pole meets triode T ₂Base stage, another termination power cathode.Protection diode D ₈Negative pole meets triode T ₁Collector electrode, positive pole connects power supply negative terminal.The operation principle of this circuit is: when energising, in capacitor C ₆, C ₇Two ends set up the direct voltage of about 300V, capacitor C ₇Charge to and make transistor T ₁Puncture conducting, trigger triode BG ₂Conducting and enter work; Capacitor C ₇To triode T ₁After the discharge, voltage reduces, triode T ₁End, no longer to triode BG ₂Trigger current is provided, and is every connection primary power source, only to triode T ₁And BG ₂Provide trigger current one time, to open bright fluorescent tube.When fault causes overcurrent, because of inductance L ₇With L ₆Coexist on the magnetic core inductance L ₆Induced current is arranged, inductance L ₇On induced current is also arranged, through diode D ₉, capacitor C ₁₃And C ₁₄, resistance R ₉Rectification, filtering and current limliting after, make triode T ₂Saturation conduction, then triode BG ₂Base potential is reduced to and is made it to end, and quits work, and frequency conversion and resonant circuit also quit work, thus entire circuit all quit work, thereby play a protective role.

Another execution mode of trigger protection circuit as shown in Figure 4, is compared with Fig. 3, and it has saved triode T ₂And affiliated element, increased overcurrent relay J, filter capacitor CA and CB, simplified circuit.Its operation principle is: when breaking down, the electric current of the relay of flowing through increases, and to making the relay J adhesive, its contact J closure makes triode BG ₂Base stage ends it to the zero line short circuit, quits work, thereby plays a protective role.

Frequency changer circuit is by triode BG ₁And BG ₂, inductance L ₃, L ₄, L ₅, capacitor C ₉, C ₁₀, resistance R ₇, R ₈Constitute.Triode BG ₁Collector electrode connects positive source, base stage connecting resistance R ₅, emitter connecting resistance R ₇Inductance L ₄Terminating resistor R ₃And R ₄Intersection point, other end connecting resistance R ₅The other end.Resistance R ₇Other end connecting resistance R ₃And R ₄Intersection point.Anti-interference capacitor C ₉One termination transistor base, other end connecting resistance R ₃And R ₄Intersection point.Triode BG ₂And affiliated element constitutes and triode BG ₂, just its base stage meets triode T ₁Emitter, collector electrode connecting resistance R ₃And R ₄Intersection point, inductance L ₅, capacitor C ₁₀And resistance R ₈The other end be connected to power supply negative terminal.Inductance L ₃One terminating resistor R ₃And R ₇Interface point, another termination capacitor C ₁₁The operation principle of this circuit is triode BG ₂Be triggered after the conducting, electric current is from inductance L ₆Flow through fluorescent tube, capacitor C ₁₂, inductance L ₈, capacitor C ₁₁, inductance L ₃, triode BG ₂And resistance R ₈, form the loop.When producing above-mentioned electric current, because inductance L ₃, L ₄, L ₅With tying on a magnetic core its inductive current direction, inductance L ₄And L ₅Opposite, work as inductance L ₃The lower end be timing, inductance L ₄The upper end is for bearing inductance L ₅The upper end is for just: triode BG then ₁Be reverse biased and end triode BG ₂Be the forward bias saturation conduction; Because capacitor C ₁₁The effect that discharges and recharges, triode BG ₂In the time of saturated, capacitor C ₁₁Also being made electric current by full charge is zero, so triode BG ₂End, at this moment inductance L ₃Induce the current potential opposite, even triode BG with former direction ₁Conducting, triode BG ₂End; And be triode BG ₂Conducting, triode BG ₁End, so move in circles, fluorescent tube just obtains high-frequency current and opens bright.

Humorous connection circuit is by capacitor C ₁₂, inductance L ₆And L ₈Constitute.Capacitor C ₁₂Bipod connects an exit of lamp tube ends respectively.Augment inductance L ₆One termination power positive pole, an exit of a termination fluorescent tube.Inductance L ₈One end and capacitor C ₁₁An end join, the remaining exit of the other end and fluorescent tube joins.Because of capacitor C ₁₁The Capacity Ratio capacitor C ₁₂Much bigger, little to the frequency influence of institute's resonance.Inductance L ₈Be adjustable, when regulating, frequency also changes, its inductance value hour, resonance frequency is the highest, the power maximum, lamp is the brightest; Otherwise, resonance frequency maximum, power minimum.

Circuit shown in Figure 3 is work like this, connects the contact 7 and 8 of ballast K switch, and the 220V civil power is after pre-filtering, and rectifying and wave-filtering provides the galvanic current source, capacitor C ₆And C ₇Charging is to making triode T ₁Puncture conducting, triode BG ₂Be triggered, conducting enters work, by triode BG ₁And BG ₂And the oscillation inverter circuit that subsidiary component constitutes opens bright fluorescent tube, and resonant circuit makes it to vibrate on certain frequency, working stability, and brightness realizes by adjusting knob 12.

As Fig. 5 and Fig. 6, the entire circuit element is contained on the wiring board 14 among the switch dimmer is contained in shell 13, constitutes a complete multi-functional dimming electronic ballast.

Claims (7)

1, a kind of electric ballast is made up of switch dimmer and electronic circuit, it is characterized in that: switch, light modulation, adjusting power, indication, protection and ballast are integrated in one.

2, electric ballast as claimed in claim 1, it is characterized in that: switch is transferred Guan Qizhong, be provided with in coil and skeleton (9) magnetic core (1) and (4) that can move as straight line, they move as straight line by intersecting drive line (2), drive sprocket axle (10) and knob (12), follower shaft (3).

3, switch as claimed in claim 2 is transferred and closed device, it is characterized in that: the transmission mechanism that magnetic core (1) and (4) are moved can be the transmission of line wheel, also can be gear and friction pulley transmission.

4, electric ballast as claimed in claim 1 is characterized in that: between the fixed touching plate (5) and input zero line of K switch, also be connected to one by resistance R ₁, R ₂Be connected in series the indicating circuit that forms with light-emitting diode DF.

5, electric ballast as claimed in claim 1 is characterized in that: adopt triode T ₁Collector electrode be connected to capacitor C ₆, C ₇Interface point, emitter meets triode GB ₂Base stage; Capacitor C ₇Disposable charging in DC circuit makes triode T ₁Puncture conducting, trigger other circuit working, every connection primary power source only provides trigger current one time to circuits for triggering.

6, electric ballast as claimed in claim 1 is characterized in that: trigger protection circuit triode T ₂Collector and emitter control triode BG ₂Base stage, make its conducting or end, and triode T ₂Base circuit make sample circuit.

7, trigger protection circuit as claimed in claim 6 is characterized in that: make control triode BG with relay J and contact thereof ₂The protective circuit of base stage, form are more simple.

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