CN201260264Y

CN201260264Y - Electronic ballast for straight pipe fluorescent lamp

Info

Publication number: CN201260264Y
Application number: CNU2008201467139U
Authority: CN
Inventors: 赵亚红; 何太宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-15
Filing date: 2008-08-15
Publication date: 2009-06-17
Anticipated expiration: 2018-08-15

Abstract

The utility model discloses electronic ballast for a straight-tube fluorescent lamp. The electronic ballast comprises a rectifying circuit, an inverting circuit and a choke output circuit. A plurality of output stages are led out on a choke coil of the choke output circuit; the output power of each output stage corresponds to the starting power of the straight-tube fluorescent lamp of one type; besides, the plurality of output stages are connected onto a matched fluorescent lamp by a corresponding multi-gear switch. The electronic ballast for the straight-tube fluorescent lamp leads the electronic ballast to realize the matching use with DC fluorescent lamps of multiple types, thus achieving the specification improvement from special use to universal use.

Description

Electronic ballast for straight tube fluorescent lamp

Technical field

The utility model relates to the electric ballast field, relates in particular to a kind of electronic ballast for straight tube fluorescent lamp.

Background technology

Fluorescent lamp has just obtained developing rapidly since being born as a kind of energy-efficient light source, and Ying Jing is widely applied in the various lighting fields.And because the high voltage starting characteristic of fluorescent lamp, its corollary apparatus electric ballast also arises at the historic moment.Electric ballast is as a kind of semi-conductor electricity sub-element that direct current or low-frequency ac voltage can be converted to high-frequency ac voltage, be widely used in driving light source works such as low-pressure gaseous discharge lamp, tungsten halogen lamp electronic-controlled installation its most widely used then be electronic ballast for fluoresent lamp.

With reference to figure 1, the electric ballast that is used for straight tube fluorescent lamp of prior art, generally by electromagnetic compatibility (Electro Magnetic Compatibility, EMC) circuit 1, rectification circuit 2, PPFC (Passive Power Factor Correction) (Passive PowerFactor Correction, PPFC) several most of compositions of circuit 3, inverter circuit 4, protective circuit 5 and output choke circuit, and described output choke circuit is a single-stage chokes output circuit 6, that is: power output all has fixing specification, and is supporting with a kind of fluorescent lamp of model; Power output as the corresponding supporting T8 type electric ballast of the starting power of T8 type fluorescent lamp with it; The power output of the T6 type electric ballast that the starting power of T6 type fluorescent lamp is corresponding supporting with it; The power output of the T5 type electric ballast that the starting power of T5 type fluorescent lamp is corresponding supporting with it; The power output of the T4 type electric ballast that the starting power of T4 type fluorescent lamp is corresponding supporting with it etc.

The shortcoming of technique scheme is that the fluorescent lamp of every kind of model all need be equipped with its special-purpose electric ballast.

The utility model content

Technical problem to be solved in the utility model is: a kind of electric ballast is provided, and described electric ballast can be used as a kind of general electronic ballast for straight tube fluorescent lamp, with the supporting use of the fluorescent lamp of multiple model.

For solving the problems of the technologies described above, the utility model adopts following technical scheme:

A kind of electronic ballast for straight tube fluorescent lamp, include rectification circuit, inverter circuit and chokes output circuit, focus on: on the choking-winding of described chokes output circuit, lead to a plurality of output stages, the power output of each output stage is corresponding with a kind of straight tube fluorescent lamp starting power of model, and the multi-position switch of described a plurality of output stage by a correspondence is connected on the supporting fluorescent lamp.

The beneficial effects of the utility model are:

Embodiment of the present utility model is by being provided with multistage chokes output circuit, thereby electric ballast has been realized and the supporting use of the fluorescent lamp of multiple model, finished from the specification special use to general improvement.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is the composition structured flowchart of the electronic ballast for straight tube fluorescent lamp of prior art.

Fig. 2 is the composition structured flowchart of the embodiment of electronic ballast for straight tube fluorescent lamp that provides of the utility model.

Fig. 3 is the circuit theory diagrams of the embodiment of electronic ballast for straight tube fluorescent lamp that provides of the utility model.

Fig. 4 is the enlarged drawing of multistage chokes output circuit part shown in Figure 3.

Embodiment

With reference to figure 2, the composition structured flowchart of the embodiment of electronic ballast for straight tube fluorescent lamp that this figure the utility model provides; As shown in the figure, present embodiment mainly comprises by EMC circuit 1, rectification circuit 2, PPFC circuit 3, inverter circuit 4, protective circuit 5 and multistage output choke circuit 7 and forming.Compared with prior art, the difference of present embodiment mainly is to export the improvement of choke circuit.Please in the lump with reference to figure 3 and Fig. 4, this enforcement improvements over the prior art mainly realize by following means: draw a plurality of

output stages

1,2 on the choking-winding L2 of chokes output circuit, the power output of each output stage is corresponding with a kind of straight tube fluorescent lamp starting power of model, as the starting power of the corresponding T6 model of the power output fluorescent lamp of the starting power of the corresponding T8 model of the power output of output stage 1 fluorescent lamp, output stage 2; And described a plurality of

output stage

1,2 is connected on the supporting fluorescent lamp by the multi-position switch S1 of a correspondence.And during concrete reality, the model of straight tube fluorescent lamp can include at least two kinds arbitrarily among T8, T6, T5, the T4, and the retaining number of described output stage and switch is respectively corresponding at least two.It should be noted that it is an example of two-stage that Fig. 3 and Fig. 4 have listed output stage, in fact, the quantity of its output stage can realize any increase and decrease as the case may be, and these increases and decreases also should be considered as protection range of the present utility model.

The above is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also are considered as protection range of the present utility model.

Claims

1, a kind of electronic ballast for straight tube fluorescent lamp, include rectification circuit, inverter circuit and chokes output circuit, it is characterized in that: on the choking-winding of described chokes output circuit, lead to a plurality of output stages, the power output of each output stage is corresponding with a kind of straight tube fluorescent lamp starting power of model, and the multi-position switch of described a plurality of output stage by a correspondence is connected on the supporting fluorescent lamp.

2, electronic ballast for straight tube fluorescent lamp as claimed in claim 1 is characterized in that, the model of described straight tube fluorescent lamp includes at least two kinds arbitrarily among T8, T6, T5, the T4, and the retaining number of described output stage and switch is respectively corresponding at least two.