CN2475253Y

CN2475253Y - Resonant induction type fluorescent lamp ballast

Info

Publication number: CN2475253Y
Application number: CN 01238494
Authority: CN
Inventors: 翁听生; 周安顺
Original assignee: GUORONG LACQUERED WIRE FACTORY SHANGHAI
Current assignee: GUORONG LACQUERED WIRE FACTORY SHANGHAI
Priority date: 2001-03-27
Filing date: 2001-03-27
Publication date: 2002-01-30
Anticipated expiration: 2011-03-27

Abstract

The utility model provides a fluorescent lamp ballast. Since the provided starting pulse voltage is relatively low, the traditional ballast can not start the energy saving fluorescent lamp tube. The resonance-inductance-type fluorescent lamp ballast of the utility model includes a primary resonance circuit and a secondary resonance circuit. Wherein, the primary resonance circuit includes a first resonance first inductance coil, a first resonance second inductance coil and a first resonance capacitor. The secondary resonance circuit includes a second resonance inductance coil, which is provided with two middle taps, and a second resonance capacitor. The primary and the secondary resonance circuits are connected with each other so as to provide high enough pulse voltage, and thus the energy saving fluorescent lamp ballast can be started which needs high pulse voltage.

Description

Resonant mode inductive type fluorescent lamp ballast

The utility model relates to a kind of ballast, relates in particular to a kind of resonant mode inductive type fluorescent lamp ballast that is used for gaseous discharge lamp.

Ballast is the equipment of a kind of stable discharging arc of adding in circuit, and it can automatically adjust to lamp tube ends voltage, makes electrical discharge arc keep stable.

In fluorescent lamp circuit, when the fluorescent tube preheating, ballast is limited in proper range together with preheating.After lamp was opened a little, it is stable that ballast is then kept arc discharge, makes voltage step-down on the fluorescent tube near its rated value (promptly limit lamp current and play the ballast effect).Simultaneously, ballast should have the favorable linearity feature, when external power voltage produces than great fluctuation process, still can supply with the fluorescent lamp stabling current.For fluorescent lamp is opened a little, adopt preheating cathode usually, make fluorescent tube produce thermionic emission, apply high-voltage pulse simultaneously to help puncture.Fluorescent lamp generally starts by aura formula build-up of luminance and ballast mating reaction, divides by Starting mode, and fluorescent lamp circuit has switching regulator start-up circuit, resonant mode start-up circuit and transformer start-up circuit.The utility model improves on existing resonant circuit basis and develops.

In the resonant mode start-up circuit, preheat curent and pulse voltage required during fluorescent lamp starting use the resonant circuit of inductor and voltage device composition to obtain, and Fig. 1 and Fig. 2 are the circuit structure patterns that present fluorescent lamp circuit comparatively generally uses.Among Fig. 1 and Fig. 2, B is a ballast, and C is a capacitor, and T is the preheating cathode transformer; L10 and L20 are secondary winding.Present inductive type starts ballast fast and is extensive use of sort circuit.The fluorescent lamp ballasting circuit of this not tape starting device, have start fast, power factor is high, fluorescent tube long service life, advantage that the circuit safety performance is good.But along with the appearance of energy-saving fluorescent lamp pipe (being commonly called as tubule), existing resonant mode Inductive ballast shows its fatal defective, and it can't open an energy-saving fluorescent lamp pipe.Because present energy-saving fluorescent lamp is because of its structural reason, its minimum starting impulse voltage is at least 400 volts, and circuit illustrated in figures 1 and 2, the effective value of the starting impulse voltage that it can provide only is about 300 volts.

Therefore, the purpose of this utility model is to provide a kind of resonant mode inductive type fluorescent lamp ballast of novelty, and it can open a little traditional fluorescent tube, can open an energy-saving fluorescent lamp pipe again.

For realizing above-mentioned purpose of the present utility model, the utility model provides a kind of resonant mode inductive type fluorescent lamp ballast, comprise resonant circuit and secondary resonant circuit, wherein, No. one time resonant circuit comprises first resonance, first inductance coil, first resonance, second inductance coil and first resonant capacitor, wherein an end of first resonance, first inductance coil is connected on the end of first resonant capacitor, and an end of first resonance, second inductance coil is connected on the other end of first resonant capacitor; Second resonant circuit comprises having two the tapped second resonant inductance coils and second resonant capacitor, one end of second resonant capacitor links to each other with a tap terminals of the second resonant inductance coil, the other end is connected on the tie point of first resonance, first inductance coil and first resonant capacitor, and the head end of the second resonant inductance coil is connected on the tie point of first resonance, second inductance coil and first resonant capacitor.

Because resonant mode inductive type fluorescent lamp ballast of the present utility model has adopted secondary resonance, thereby can provide enough starting impulse voltage, the open circuit voltage effective value of this inductive type ballast through secondary resonance can reach the 420-440 volt, provides reliable assurance for opening an energy-saving fluorescent lamp pipe like this.

Describe specific embodiment of the utility model in detail below in conjunction with accompanying drawing.

In the accompanying drawing:

Fig. 1 and Fig. 2 are the circuit structures of the resonant mode ballast that uses of traditional fluorescent lamp circuit;

Fig. 3 is the circuit structure of resonant mode inductive type fluorescent lamp ballast of the present utility model;

Fig. 4 is the structural representation of resonant mode inductive type fluorescent lamp ballast of the present utility model.

For the open circuit voltage effective value of resonant mode inductive type ballast is provided, the utility model has adopted the circuit structure of secondary resonance.As shown in Figure 3, ballast of the present utility model is made up of two resonant circuits: first resonant circuit (being made up of inductance coil L1A, L1B and capacitor C1) and second resonant circuit (being made up of inductance coil L2 and capacitor C2).First resonant circuit comprises that first resonance, the first inductance coil L1A, first resonance, the second inductance coil L1B and the first resonant capacitor C1 form, wherein, the end of first resonance, the first inductance coil L1A is connected on the end of the first resonant capacitor C1, and the end of first resonance, the second inductance coil L1B is connected on the other end of the first resonant capacitor C1.First resonant circuit is a series resonant circuit.

Second resonant circuit has the tapped second resonant inductance coil L2 by one and the second resonant capacitor C2 forms, the end of the second resonant capacitor C2 links to each other with the tap terminals of the second resonant inductance coil L2, and the other end is connected on the tie point of first resonance, the first inductance coil L1A and the first resonant capacitor C1.The head end of the second resonant inductance coil L2 is connected on the tie point of first resonance, the second inductance coil L1B and the first resonant capacitor C1.

This resonant mode inductive type ballast is connected as shown in Figure 3 with energy-saving fluorescent lamp and power supply, that is, the other end of first resonance, first inductance coil (promptly not link) is connected with an end of the electrode of fluorescent tube L.The other end of first resonance, second inductance coil (promptly not link) links to each other with AC power, and the other end of AC power is connected on the other end of an electrode of fluorescent tube L.The end of the second resonant inductance coil is connected with the two ends of another electrode of fluorescent tube L with another centre tap end.

The operation principle of the circuit of Fig. 3 is to adopt the secondary resonant circuit, and first resonant circuit produces a resonance, and second resonant circuit produces secondary resonance.The electrode of inductance coil L1A, L1B and L2 preheating fluorescent tube simultaneously, after fluorescent tube opens a little, plays metering function, makes the lamp operate as normal.Capacitor C1 in the circuit and C2 play the effect of correcting power factors simultaneously.

For the ease of making and using, capacitor C1 in Fig. 3 circuit and C2 can be made the capacitor of a special use, promptly the end of its capacitor C1 and C2 links together, and forms a three-terminal capacitor; First resonance, first inductance coil L1A and first resonance, the second inductance coil L1B are installed in the same housing, form a four-terminal device L1; The second resonant inductance coil L2 is installed in the same housing, forms one four end inductance coil device.Inductance coil L1, L2 and dedicated capacitor are connected by circuit relation shown in Figure 3, form resonant mode inductive type ballast of the present utility model shown in Figure 4.

Claims

1, a kind of resonant mode inductive type fluorescent lamp ballast, it is characterized in that, comprise resonant circuit and secondary resonant circuit, wherein, No. one time resonant circuit comprises first resonance, first inductance coil, first resonance, second inductance coil and first resonant capacitor, wherein an end of first resonance, first inductance coil is connected on the end of first resonant capacitor, and an end of first resonance, second inductance coil is connected on the other end of first resonant capacitor; Second resonant circuit comprises having two the tapped second resonant inductance coils and second resonant capacitor, one end of second resonant capacitor links to each other with a tap terminals of the second resonant inductance coil, the other end is connected on the tie point of first resonance, first inductance coil and first resonant capacitor, and the head end of the second resonant inductance coil is connected on the tie point of first resonance, second inductance coil and first resonant capacitor.

2, resonant mode inductive type fluorescent lamp ballast as claimed in claim 1 is characterized in that, an end of first resonant capacitor and second resonant capacitor links to each other, and constitutes a three-terminal capacitor.