CN2471057Y - Preheating typ all-digital electronic ballast - Google Patents

Abstract

The utility model is a preheating full digital electronic rectifier, which consists of a power processing circuit, a fluorescent tube control circuit and a surge circuit, a preheating and detection circuit, and a fluorescent tube protection circuit; an output end of the preheating and a detection circuit is connected to the surge circuit, another output end is connected to a input end and output end of the fluorescent lamp protection circuit; the output end of the fluorescent tube protection circuit connects and controls the power of control circuit of the fluorescent tube. The utility model is high in power factor and will not affect a power grid; the equipment can preheat and start the fluorescent lamp; when the circuit is over-voltage, under-voltage, open circuit, or short circuit, the equipment can automatically cut off the power, protect the fluorescent tube and prolong the life of the fluorescent tube.

Description

Pre-heated All Digital Electronic ballast

The utility model relates to a kind of ballast, particularly a kind of digital and electronic ballast.

Ballast is to make the components and parts of fluorescent lamp operate as normal for fluorescent lamp provides starting voltage, stable operating voltage and electric current.The life-span of its product confrontation fluorescent lamp and the performance of efficient have a significant impact, and be also influential to power network simultaneously.Existing ballast has two classes: a kind of is conventional coil silicon steel chip ballast, and not a kind of is the matching test electric stabilizer.This two classes ballast poor quality, power factor are low, cause: 1, a large amount of power reactive power consumptions; 2, fluorescent lamp can't reach effective emission standards; 3, ballast temperature rise; When 4, electric current changed, the current/voltage shakiness of ballast output caused the brightness fluctuation of fluorescent lamp; 5, reduce the life-span of fluorescent lamp.Require further improvement and regenerate based on these existing these two kinds of ballasts.Increasingly extensive use and the development of technology and the environmental requirement that must meet available resources consumption on the utilization of raising resources effective, the minimizing earth along with fluorescent lamp press for novel ballast.

The purpose of this utility model provides a kind ofly has defencive function, pre-heated All Digital Electronic ballast that power factor is high to fluorescent tube.

The purpose of this utility model is achieved in that pre-heated All Digital Electronic ballast, comprises power supply processing circuit, fluorescent tube control circuit and oscillating circuit, preheating and testing circuit, fluorescent tube protective circuit; It is characterized in that: 1, preheating and testing circuit; An output of this circuit connects triode, and by this triode oscillating circuit of light pipe control circuit day after day, another exports day after day the controlled end of controllable silicon SCR in the light modulation protective circuit, and an input of this circuit links to each other with the output of fluorescent lamp protective circuit; 2, fluorescent tube protective circuit; the output of this circuit connects collector electrode, the transistor base of emitter string on the power line of fluorescent tube control circuit; the main coil string of this circuit inductance coil is on the power line of fluorescent tube, and the controllable silicon SCR two ends are by resistance or the diode power line or the ground of light pipe control circuit day after day.

The utility model power factor height, thereby can not impact electrical network; Because of having fluorescent tube protective circuit and preheat circuit, can carry out pipeline start up by preheating to fluorescent lamp, when overvoltage, low pressure or open circuit, short circuit appear in circuit in addition; can cut off the electricity supply automatically; fluorescent tube is protected, increased the life-span of fluorescent tube, can not cause the waste of resource.

Fig. 1 is the utility model block diagram.

Fig. 2 is the utility model embodiment circuit diagram.

With reference to the accompanying drawings embodiment is described.

(seeing accompanying drawing 2) power line N is by behind the protective tube F1, connect shell by capacitor C Y3 on the one hand, 4 ends that connect transformer FL1 on the one hand, power line L connects shell by capacitor C Y2,1 end that directly connects transformer LF1 on the other hand, connect capacitor C X1 between 2,3 ends of FL1,2 ends of transformer FL1 connect shell by capacitor C Y1,3 ends of transformer FL1 connect inductance L 1, between 2 ends of the other end of inductance L 1 and transformer FL1 adjustable resistance W is arranged, diode D1, D2, D3, D4 are connected into bridge rectifier, and W is in parallel with adjustable resistance.Output 1 end of bridge rectifier divides three the tunnel, the one tunnel through power supply process chip L6560 and adjunct circuit thereof, forms the power supply of fluorescent tube; One the tunnel forms the power supply of preheating and testing circuit, fluorescent tube control circuit, fluorescent tube protective circuit through transformer T1; Another road constitutes preheating and detects feedback signal through diode D5, D14, resistance R 13, R14, R17, capacitor C 11.Concrete connection is: capacitor C B is connected between output 1 and the ground, resistance R 1, the series circuit of R2 is connected between 3 pin of output 1 end and chip L6560, resistance R 3, the parallel circuits of capacitor C 2 is connected between 3 pin and ground of chip L6560, capacitor C 3 is connected in 1 pin of chip L6560, between 2 pin, 4 pin of chip L6560 connect ground by capacitor C 5 on the one hand, 1 pin that connects field effect transistor Q1 on the other hand by resistance R 7, simultaneously by resistance R 7, R8 connects ground, the parallel circuits that voltage-stabiliser tube ZD1 and capacitor C 4 are arranged between 8 pin of chip L6560 and the ground, 8 pin of chip L6560 are by resistance R 4B, output 1 end of R4A series circuit crossover formula rectification circuit is by resistance R 6A, diode D6 connects 3 pin of transformer T1.7 pin of chip L6560 connect 2 pin of field effect transistor Q1 by resistance R 6, the series arm of resistance R 25 and diode DA is parallel to the two ends of resistance R 6,6 pin of chip L6560 connect ground, 5 pin of chip L6560 connect 3 ends of transformer T1 by resistance R 5,1 output of the 1 end crossover formula rectification circuit of transformer T1,3 pin of the 2 end continuous show effect pipe Q1 of transformer T1 and the anode of diode D7, capacitor C 9 is connected between the negative electrode of 1 end of transformer T1 and diode D7, resistance R 39, the R40 series connection, resistance R 9, R11, the R10 series connection, these two series arms and capacitor C 1 common formation parallel circuits, this parallel circuits is connected between the negative electrode and ground of diode D7.The common port of resistance R 10 and R11 links to each other with 1 pin of chip L6560.More than constitute the power supply processing circuit of present embodiment.The output of this circuit is the negative electrode of diode D7, the negative electrode of D7 links to each other with 3 pin of field effect transistor Q2,1 pin of field effect transistor Q2,3 pin of field effect transistor Q3 link to each other, also link to each other simultaneously with 1 end of transformer T2 and 1 end of transformer T3,2 pin of field effect transistor Q2 connect 7 pin of chip L6569 by resistance R 21,1 pin of field effect transistor Q3 connects ground, and 2 pin of field effect transistor Q3 connect 5 pin of chip L6569 by resistance R 22.6 pin of chip L6569 connect 1 pin of field effect transistor Q2,8 pin that connect chip L6569 simultaneously by capacitor C 17,1 pin of chip L6569, be connected with diode D16 (anode of diode D16 connects 1 pin of chip L6569) between 8 pin, voltage stabilizing didoe ZD3, capacitor C 13, C14 constitutes parallel branch and is connected between 1 pin and ground of chip L6569,2 pin of chip L6569 connect the collector electrode (3 pin) of triode Q4 on the one hand, on the one hand by resistance R 32, the series arm of variable resistor VR1 connects 3 pin of chip L6569, capacitor C 16 is connected between 3 pin and ground of chip L6569, and 2 pin of triode Q4 connect 3 pin of chip L6569 by resistance R 26.Resistance R 32, variable resistor VR1, capacitor C 16, resistance R 26, constitute the oscillating circuit of chip L6569 jointly, 4 pin of chip L6569 connect ground.4 ends of transformer T1 connect the anode of diode D15, the parallel circuits that capacitor C 15, C6 are arranged between the negative electrode of D15 and the ground, diode D15 and capacitor C 15, C6 have constituted the power filter rectification circuit of preheating and testing circuit, resistance R 36 is connected between the negative electrode of 11 ends of operational amplifier 4 and diode D15, between 11 ends of operational amplifier 4 and the ground voltage-stabiliser tube ZD2 is arranged.Resistance R 23, diode D10 constitute parallel circuits, and this parallel circuits one end connects the negative electrode of diode D15, and the other end connects 10 ends of operational amplifier 4,6 ends of operational amplifier 2 and the anode (negative electrode of capacitor C 7 connects ground) of capacitor C 7 simultaneously.Resistance R 31, voltage-stabiliser tube ZD4 constitutes series arm, be connected between the negative electrode and ground of diode D15,7 ends of the common port of resistance R 31 and voltage-stabiliser tube ZD4 and operational amplifier 2,9 ends of operational amplifier 3,4 ends of operational amplifier 1 link to each other, between 1 end of resistance R 24 concatenation operation amplifiers 2 and the negative electrode of diode D15,1 end of operational amplifier 2 links to each other with the base stage of triode Q4,14 ends of operational amplifier 3 connect the negative electrode of diode D15 by resistance R 29, the common port that connects diode D13 and resistance R 41 and triode Q9 collector electrode by diode D12,2 ends of operational amplifier 1 connect the negative electrode of diode D15 by resistance R 35, the collector electrode and the diode D13 that connect triode Q9 on the other hand by diode D11, the common port of resistance R 41, resistance R 41, another common port of diode D13 connects the controlled end of controllable silicon SCR.5 ends of operational amplifier 1 connect ground by resistance R 30, on the other hand 8 ends by resistance R 42 concatenation operation amplifiers 3 and resistance R 16, capacitor C 26 (another pin of capacitor C 26 connects ground).3 ends of operational amplifier 1 connect the negative electrode of diode D15.The emitter of triode Q9 connects ground, and base stage connects ground by the resistance R 27 even negative electrode of diode D15 by resistance R 28, also links to each other with 13 ends of operational amplifier 4 simultaneously.The anode of diode D5 connects bridge rectifier 1 end, negative electrode connects resistance R 13 by resistance R 17 on the one hand, the back links to each other with the common port of resistance R 14, capacitor C 11, diode D14 (other end of resistance R 14, capacitor C 11 connects ground), connects 8 ends of operational amplifier 3 on the other hand by the series circuit of resistance R 15, R16.The negative electrode of diode D14 connects the emitter of triode Q6 on the one hand, the base stage that connects triode Q6 on the other hand by resistance R 38, the collector electrode of triode Q3 also connects the base stage of triode Q8 simultaneously by diode D23, connect the collector electrode of triode Q8 by resistance R 18.The collector electrode of triode Q8 is to link to each other with the negative electrode of diode D15.The emitter of triode Q8 connects 1 pin of chip L6569.The collector electrode of triode Q6 links to each other with the base stage of triode Q7.The base stage of Q7 connects ground by resistance R 20, capacitor C 25 parallel circuitss, connects the common port of resistance R 19, capacitor C 28, diode D20, D21 by resistance R 34.The emitter of triode Q7 connects ground, and the other end of resistance R 19 connects the emitter of triode Q8 by diode D17.Capacitor C 28 other ends connect ground, and the anode of diode D20, D24 connects 4 ends of induction coil T2.The anode of diode D21, D25 connects 4 ends of induction coil T3.The common port of diode D25, D24 connects ground by the parallel circuits of capacitor C 27 and resistance R 44, the parallel circuits that connects resistance R 33 and capacitor C 30 by resistance R 17, the other end of this parallel circuits connects ground, capacitor C 31, resistance R 45 parallel connections, one end links to each other with the controlled end of controllable silicon SCR, the other end connects ground, and voltage-stabiliser tube ZD5 is connected between the control end of resistance R 17 and controllable silicon SCR.The anode of controllable silicon SCR is by resistance R 46 even 1 pin of chip L6569, and the negative electrode of controllable silicon SCR connects ground by diode D26.2 ends of induction coil T2 connect a termination of fluorescent tube lamp sockets by capacitor C 21, and capacitor C 23 is connected between the termination of two lamp sockets of fluorescent tube.2 ends of induction coil T3 connect a termination of fluorescent tube lamp sockets by capacitor C 22, and capacitor C 24 is connected between the termination of two lamp sockets of fluorescent tube.

The course of work of the utility model embodiment is as follows: after 220V voltage enters ballast, through preventing pulse, EMI suppression, elimination EMC, rectifier power source, through IC6560 220V voltage being adjusted again, when fluctuation appears in voltage, output is compensated, the output voltage electric current is remained unchanged, and the power factor adjustment is remained on more than 0.99, make whole ballast be operated in stable state.The effect of preheating and testing circuit is a preheating filament when starting, and makes it reach temperature when lighting a lamp; Light a lamp finish after, then enter the variation that detects output; When fluorescent tube occurs out, short circuit or when aging, start protective circuit, cut off the electricity supply.The effect of oscillating circuit is: keep the frequency of oscillation of 48KHZ to make the IC6569 lamp tube control circuit that the smooth sudden strain of a muscle frequency of fluorescent tube high frequency state normally is provided.

Claims (1)

1. hot type All Digital Electronic ballast comprises power supply processing circuit, fluorescent tube control circuit and oscillating circuit, preheating and testing circuit, fluorescent tube protective circuit; It is characterized in that: 1, preheating and testing circuit; An output of this circuit connects triode, and by this triode oscillating circuit of light pipe control circuit day after day, another exports day after day the controlled end of controllable silicon SCR in the light pipe protective circuit, and an input of this circuit links to each other with the output of fluorescent tube protective circuit; 2, fluorescent tube protective circuit; the output of this circuit connects collector electrode, the transistor base of emitter string on the power line of fluorescent tube control circuit; the main coil string of this circuit inductance coil is on the power line of fluorescent tube, and the controllable silicon SCR two ends are by resistance or the diode power line or the ground of light pipe control circuit day after day.

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