CN2240227Y

CN2240227Y - Multi-functional electronic ballast

Info

Publication number: CN2240227Y
Application number: CN 95206895
Authority: CN
Inventors: 周建华
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-31
Filing date: 1995-03-31
Publication date: 1996-11-13
Anticipated expiration: 2005-03-31

Abstract

The utility model relates to a multi-functional electronic ballast, comprising a a rectifying circuit, a high-frequency oscillating circuit, a light adjusting resonating circuit, a protection circuit and an antijamming circuit. The utility model can make the fluorescent tube light after a lamp filament is broken. The utility model has the advantages of multi-stage light adjusting, reliable operation and long service life.

Description

The multifunction electric sub-ballast

The utility model relates to the daylight ballast for lamp, particularly a kind of multifunction electric sub-ballast.

Existing various ballast all has only a single ballast function; can not realize light modulation, increase the service life and the function of protective circuit; therefore use inconvenient; a kind of novel electronic ballast for fluorescent lamp is disclosed in CN2092844U; though it has prolonging lamp tube useful life, make the fracture of wire fluorescent tube continue advantages such as uses, owing to new, old (fracture of wire) fluorescent tube is to use in same circuit; influence the useful life of new fluorescent tube, therefore do not reach the purpose of real life-saving.

The purpose of this utility model is that design is a kind of simple in structure, easy to use, can realize light modulation, lengthens the life, multi-functional electric ballasts such as protection and ballast.

The purpose of this utility model realizes by following structure: the multifunction electric sub-ballast, include rectification circuit, high-frequency oscillating circuits, light modulation resonant circuit, electronic protection circuit and anti-jamming circuit, its main feature is: the light modulation resonant circuit is to constitute the light modulation tap that has several to cooperate with dimmer switch K1 by the resonance coil B2 that is connected on fluorescent tube one end with K switch 2, C6, R6 that coil B2 forms resonant tank on coil B2 primary coil; Electronic protection circuit includes sample resistance R12 that is connected on B2 time grade and the 555NE integrated package that joins with R12, is connected to the controller of control high-frequency oscillating circuits at the output of NE integrated package; The utility model in use, light modulation realizes with the closure of the different taps of B2 coil by control switch K1, prolonging lamp tube then is that K2 closes when the lamp tube ends filament is disconnected useful life, resonant circuit is intended into resonant tank by the primary coil of C5, B7 with K7, C6, R9, make the fluorescent tube endure, realize the purpose that increases the service life.

The utility model compared with prior art has following advantage:

1. the multistage light modulation of energy adapts to various workplaces;

2. can make fluorescent tube luminous at the filament back endure that broken; And make new pipe and useless pipe be in oneself optimum Working respectively by K2, do not influence the useful life of new pipe.

3. because the work of protective circuit control main vibration circuit is arranged, the reliability height of circuit, useful life is longer.

Description of drawings of the present utility model is as follows:

Fig. 1 is the novel circuit diagram of this reality;

Among the figure: 1, rectification circuit, 2, high-frequency oscillating circuits, 3, the light modulation resonant circuit, 4, electronic protection circuit, 5, anti-jamming circuit.

Below in conjunction with accompanying drawing and enforcement side structure of the present utility model and operation principle are further described:

As shown in Figure 1: the utility model includes rectification circuit 1, high-frequency oscillating circuits 2, light modulation resonant circuit 3, electronic protection circuit 4 and anti-jamming circuit 5, its principal character is: the light modulation resonant circuit is to form the K switch 2 of resonant tank by the resonance coil B2 that is connected on fluorescent tube one end with coil B2, C6, R6 constitutes, the light modulation tap that on coil B2 primary coil, has several to cooperate with dimmer switch K1, electronic protection circuit includes sample resistance R12 that is connected on B2 time grade and the 555NE integrated package that joins with R12, is connected to the controller of control high-frequency oscillating circuits at the output of NE integrated package; Controller can constitute by the BG4 that is connected on the NE chip output and by the BG3 of BG4 Control work; The output of BG3 is connected on the n4 level of B1 coil; In order to show that ballast whether can operate as normal, on the base stage of BG3, be connected to indicator light LED.Operation principle of the present utility model is as described below:

1. light modulation part operation principle:

C5 is a block isolating circuit, and high-frequency current is by C5, and the elementary tapped coil of 1 couple of B2n of K switch carries out the selectivity closure, and the output electric current that n limited is used for the fluorescent tube illumination.(example: 1 pair of n3 coil tap of K switch closure, at this moment lamp works is under the power consumption state of 40W.K1 is to the coil tap closure of n2, and lamp works is under the power consumption of 30W.K1 is to n1 coil tap closure, and lamp works is under the power consumption of 20W, and their employed fluorescent tubes are the fluorescent tubes of a 40W).Such light-dimming method, the effect of having accomplished one tube multipurpose.

K2 disconnects when the fluorescent tube that uses is new fluorescent tube (being that the two ends filament is intact), and resonant circuit is by the primary coil of C5, B2, and the filament of lamp tube ends and CT form resonant tank, and the starting voltage of fluorescent tube is obtained from the C7 two ends.

(the two ends lamp is according to disconnected) K2 closure when the fluorescent tube that uses is useless pipe, resonant circuit forms the attainments loop that shakes by the primary coil of C5, B2 and K2, C6, R9, and the starting voltage of fluorescent tube is obtained from the C6 two ends.

Their advantage is: newly manage and useless pipe is in oneself optimum state separately, avoided the use that mixes of new pipe and useless pipe, help prolonging the useful life of new pipe.

2. electronic protection circuit operation principle:

N4 is the secondary coil of B2, and signal obtains from n4 induction, and through R12, D8, the C10 time-delay of charging, when being charged to certain voltage, the input of 555NE becomes high level by low level, and output becomes low level by high level, and BG4 does not have bias current and ends; The bias current of BG3 is supplied with from R10, LED, and BG3 has bias current and conducting.Because BG3 has enough bias currents and conducting.Internal resistance between the BG3 collector and emitter is very little, and the secondary coil n4 of B1 and D7BG3 form the loop of approximate short circuit, and primary coil n1, the n2 of B1 do not have the high frequency positive feedback and the failure of oscillations.Since C5 every straight effect, the fluorescent tube non-transformer is supplied with and is quit work.

Its advantage is the work that the secondary coil n4 of B1 controls main vibration circuit.Control partly directly is not connected in the main vibration circuit.The reliability height of electricity, advantages such as life-span length.

Claims

1, a kind of multifunction electric sub-ballast, include rectification circuit (1), high-frequency oscillating circuits (2), light modulation resonant circuit (3), electronic protection circuit (4) and resist in disturbing circuit (5), it is characterized in that: the light modulation resonant circuit is to constitute the light modulation tap that has several to cooperate with dimmer switch K1 by the resonance coil B2 that is connected on fluorescent tube one end with K switch 2, C6, R6 that coil B2 forms resonant tank on coil B2 primary coil; Electronic protection circuit includes sample resistance R17 that is connected on B2 time grade and the 555NE integrated package that joins with R17, is connected to the controller of control high-frequency oscillating circuits at the output of NE integrated package.

2, multifunction electric as claimed in claim 1 sub-ballast, its special giving birth to is: controller is to constitute by the BG4 that is connected on the NE chip output and by the BG3 of BG4 Control work, and the output of BG3 is connected on the n4 level of B1 coil.

3, multifunction electric as claimed in claim 2 sub-ballast is characterized in that: be connected to indicator light LED on the base stage of BG3.