CN2899382Y

CN2899382Y - Separated jacketed electronic inductive ballast

Info

Publication number: CN2899382Y
Application number: CN 200620041458
Authority: CN
Inventors: 冉峰; 姜玉稀; 何一卿; 汤为杰; 张齐
Original assignee: Shanghai Jing Tian Electronic Technology Co Ltd; University of Shanghai for Science and Technology
Current assignee: Shanghai Jing Tian Electronic Technology Co Ltd; Shanghai University; University of Shanghai for Science and Technology
Priority date: 2006-04-28
Filing date: 2006-04-28
Publication date: 2007-05-09
Anticipated expiration: 2016-04-28

Abstract

The utility model relates to an electronic inductive ballast of separated-jacket type, comprising an inductive ballast, an electric power converter which can be connected to one end of a T5 fluorescence lamp, a voltage-limiting protector which can be connected to another end of the fluorescence lamp. The two connection terminals of the electric power converter are respectively connected to the two connection terminals of the voltage-limiting protector through the inductive ballast and an over-current protector. The utility model can be used to replace a T8 fluorescence lamp by a T5 fluorescence lamp, and has the advantages of convenient replacement; time, labour and cost saving; energy saving and longer life-span of lamp.

Description

Split socket joint type electronic inductance ballast

Technical field

The utility model relates to a kind of Ballasts Used in Fluorescent Light, the split socket joint type electronic inductance ballast of using when particularly a kind of T8 fluorescent tube with fluorescent lamp changes the T5 fluorescent tube into.

Background technology

The current starting stage that is in novel T5 fluorescent tube replace old type T8 fluorescent tube in the world.Because the T5 fluorescent tube, has many advantages such as high brightness, efficient, energy-conservation, eyeshield, longevity, environmental protection with rare-earth trichromatic luminescent material of new generation.But the T8 fluorescent tubes that still use in a large number at present to be replaced with the T5 fluorescent tube, will abandon the fluorescent lamp corollary equipment of original the whole series, not only take a lot of trouble expensive but also waste multiple resources such as copper, silicon, steel, insulating material.

The utility model content

The purpose of this utility model is to provide a kind of split socket joint type electronic inductance ballast can be applied to the T8 fluorescent tube is replaced with the T5 fluorescent tube, keeps original fluorescent lamp corollary equipment basically, and it is convenient to change, time saving and energy saving province expense.

For achieving the above object, the utility model adopts following technical proposals:

A kind of split socket joint type electronic inductance ballast; comprise an Inductive ballast; it is characterized in that having one and can connect the electronic power converter of T5 fluorescent tube one end, the stop voltage protector that can connect the T5 fluorescent tube other end, two splicing ears of described electronic power converter are connected two splicing ears of described stop voltage protector respectively with an overcurrent protective device by described Inductive ballast.

Above-mentioned electronic power converter is the socket cap with the stop voltage protector and can overlaps to wear and be connected the T5 fluorescent tube: there are two of two jacks and the T5 fluorescent tube one end pin couplings of pegging graft its socket cap the inner, and socket cap outer end have two peg graft pin can with the base coupling that is fixed on the Fluorescent Light and Fixtures.

Have the heat radiation slotted eye on the shell of above-mentioned electronic power converter.

Above-mentioned overcurrent protective device is the small column body, its termination have two peg graft pin can with the starter base inserting.

The utility model has following conspicuous substantive distinguishing features and advantage compared with prior art:

1, changes conveniently: only need change T8 fluorescent tube and starter, need not change original device and circuit, substitute starter, put on the socket cap in the T5 lamp tube ends and just can directly substitute the T8 fluorescent tube with overcurrent protective device; The replacing time only needs 1～2 minute, does not easy and simple to handlely need the professional, and more not needing to stop work has a power failure.

2, low cost: tube stand originally, Inductive ballast, base, starter base and wiring etc. all can intactly make full use of.

3, power and energy saving, ballast efficiency factor height

4, can use the replacement of T5 fluorescent tube 58W, the 36W of 35W, 28W, 21W, 14W, the T8 fluorescent tube of 30W, 18W respectively.Under the prerequisite that brightness of illumination improves, energy-conservationly can reach between 40% to 22% respectively; Under the situation that brightness of illumination equates, energy-conservationly reach as high as 50%.

5, the protection of overcurrent protection and stop voltage is arranged, fail safe is good.

Even 6, filament blows, fluorescent tube still can be lighted, further prolonging lamp tube useful life.

7, the frequency of fluorescent tube two terminal voltages is about 50KHz, the frequency domain of the human energy perception of overflowing far away; No stroboscopic, no AC power frequency noise are a kind of green illuminations.

8, comply with the national standard requirements: fluorescent tube two ends filament pre-heating, prolonging lamp tube useful life; Power factor 〉=0.9, electric current crest factor≤1.7.

Description of drawings

Fig. 1 is the fluorescent lamp system block diagram that the utility model is applied to be replaced with the T5 fluorescent tube.

Fig. 2 is the outline drawing of the electronic power converter among Fig. 1.

Fig. 3 is the outline drawing of the stop voltage protector among Fig. 1.

Fig. 4 is the outline drawing of the overcurrent protective device among Fig. 1.

Fig. 5 is overcurrent protective device and stop voltage protector performance diagram.

Fig. 6 is the circuit theory diagrams of electronic power converter among Fig. 1.

Fig. 7 is the circuit theory diagrams of overcurrent protective device among Fig. 1.

Fig. 8 is the circuit theory diagrams of stop voltage protector among the figure.

Embodiment

Details are as follows in conjunction with the accompanying drawings for a preferred embodiment of the present utility model:

Referring to Fig. 1; this split socket joint type electronic inductance ballast includes an Inductive ballast 1; an electronic power converter that can connect T5 fluorescent tube 4 one ends 3, the stop voltage protector 5 that can connect T5 fluorescent tube 4 other ends are arranged, and two splicing ears of described electronic power converter 3 are connected two splicing ears of described stop voltage protector 5 respectively with an overcurrent protective device 8 by described Inductive ballast 1.

Referring to Fig. 2, Fig. 3 and Fig. 4; above-mentioned electronic power converter 3 is the socket cap with stop voltage protector 5 and can overlaps to wear and be connected T5 fluorescent tube 4: there are two of two jacks and the T5 fluorescent tube one end pin couplings of pegging graft its socket cap the inner, and socket cap outer end have two peg graft pin can with

base

2,6 couplings that are fixed on the Fluorescent Light and Fixtures 9.Have the heat radiation slotted eye on the shell of above-mentioned electronic power converter 3.Above-mentioned overcurrent protective device 8 is the small column body, its termination have two peg graft pin can with the starter base inserting.

The circuit structure of above-mentioned electronic power converter 3, overcurrent protective device 8 and stop voltage protector 5 is respectively as Fig. 6, Fig. 7 and shown in Figure 8.

Operation principle:

1. the electronic power converter 3

Electronic power converter 3 is a kind of voltage of variation, the semi-bridge type inverter of current feedback, sees Fig. 6.Saturable transformer has L1, L2, three windings of L3, and winding forms voltage positive feedback with inscription end (among Fig. 6 with mark) on-position, makes inverter enter the vibration operating mode.The series connection of fluorescent tube one end filament loop inserts the industrial frequency AC input of bridge rectifier, sees Fig. 1, and form Current Negative Three-Point Capacitance and make the input current waveform trend sinusoidal, thus the bring to power factor.

When the electronic power converter of Fig. 6 powers on, the start-up circuit of forming by resistance R 1, capacitor C 3 and bidirectional trigger diode DIAC, when institute's charging voltage reaches the puncture voltage of bidirectional trigger diode DIAC on the capacitor C 3, for half-bridge lower end transistor T 2 base stages provide a positive triggering pulse, make T2 begin conducting.The positive feedback of saturable transformer causes the enough big voltage of L2 winding output to make T2 base stage positively biased, jumps to saturation conduction fast.Institute's charging voltage constitutes loop discharge, start-up circuit end-of-job by diode D5 and T2 on the capacitor C 3.

T2 jumps to saturation conduction fast, and the collector current of T2 makes and produces in capacitor C 4, C5 inductance L 3, the L4 branch road because of electric current rises to excitation, and forming frequency is the series resonance of fo, and resonance is lighted fluorescent tube at the high pressure of C4 and the generation of L4 junction.Because ω L3＜＜ω L4,1/ (ω C5)＜＜1/ (ω C4), frequency of oscillation fo is mainly by L4 and C4 decision.

It is to rise because of generation electric current in capacitor C 4, C5 inductance L 3, the L4 branch road increases in time that the electronic power converter enters steady state condition, so that the saturable transformer magnetic core is gradually saturated, flux value changes gradually and reduces, the induced potential decline that the L2 winding produces.T2 base drive descends thereupon, and the collector current that flows through the L3 winding also descends.Descend, can produce the induced potential of reversed polarity at L1, L2, three windings of L3 because of the inductance prevention collector current of winding.Voltage positive feedback rises to the reversed polarity induced potential, and the L2 winding produces enough big reversed polarity induced potential becomes instead partially the T2 base stage, withdraws from saturated jumping to and ends; The L1 winding produces enough big reversed polarity induced potential makes the T1 base stage become positively biased, withdraws from by jumping to saturated.So go round and begin again, T2 and T1 take turns saturated and end, and form the vibration operating mode.The frequency of oscillation of steady state condition is by comprehensive decision such as saturable transformer magnetic core size, saturation flux density, umber of turn, transistor storage time.

Resistance R 2 provides initial DC channel for the collector current of T2, easily produces gain so that the T2 working point enters the linear amplification district, lights fluorescent tube thereby make the easy starting of oscillation of inverter enter operating mode.The R2 resistance should rationally be chosen, and its resistance is too big, and the inverter difficult oscillation starting can not be worked; Its resistance too low power consumption is big, and the electronic power transducer effciency descends.

Fluorescent tube one end filament pre-heating is the effect of the industrial frequency AC input starting current of bridge rectifier.Fluorescent tube other end filament pre-heating voltage is that above-mentioned series resonance electric current dividing potential drop on inductance L 4 produces.By the selected parameter of design, guarantee that the voltage magnitude preheating of dividing potential drop generation appropriately and not can be burnt filament.

2. the stop voltage protector 5

Stop voltage protector 5 is carried out voltage-limiting protection with applying voltage on the fluorescent tube one end filament, guarantees that this end filament can not burn because of overtension.Its voltage-limiting protection function is contributed by the bi-directional voltage stabilizing pipe, and characteristic curve is seen Fig. 2, and circuit theory diagrams are seen Fig. 8.

3. overcurrent protector 8

For than the high-power fluorescent lamp electric ballast; when fluorescent tube has been broken or do not have fluorescent tube; resonant circuit does not have damping; and that circuit will produce will be very high-power; have bigger source current this moment; overheated for preventing that overcurrent from producing, even damage components and parts, it is very necessary taking the overcurrent protection measure.

The characteristic curve of overcurrent protector is seen Fig. 2, and electrical schematic diagram is seen Fig. 7.Its operation principle is:

Diode D1～D4 constitutes rectifier bridge, and the AC rectification of importing is become direct current.Polarity as shown in Figure 7.During operate as normal, positive voltage is given triggering signal of bidirectional thyristor TRIAC, the bidirectional thyristor TRIAC conducting of main channel through resistance R 2.The ballast electric current constitutes the loop through rectifier bridge to TRIAC, R1.Because the R1 resistance is very little, makes the pressure drop on the R1 very low, causes U _C1Lower, so diode D5 and triode T end.Because voltage-stabiliser tube VS does not puncture, so this branch road is obstructed, LED does not work among this moment another subaisle branch road R5-LED-VS.When overcurrent, the pressure drop of big electric current on R1 raises, and makes U _C1Voltage and then raise, cause diode D5 and triode T conducting.The collector voltage of triode T reduces, and the bidirectional thyristor TRIAC of main channel is ended, and this moment, LED was bright, sends over-current signal because voltage-stabiliser tube VS punctures, and the ballast electric current circulates in above-mentioned another subaisle branch road R5-LED-VS.Because the bidirectional thyristor TRIAC of main channel ends, and subaisle light-emitting diode current in loop is placed restrictions in very little value by resistance R 5, so played overcurrent protection.

Claims

1. split socket joint type electronic inductance ballast; comprise an Inductive ballast (1); it is characterized in that having one and can connect the electronic power converter (3) of T5 fluorescent tube (4) one ends, the stop voltage protector (5) that can connect T5 fluorescent tube (4) other end, two splicing ears of described electronic power converter (3) are connected two splicing ears of described stop voltage protector (5) respectively with an overcurrent protective device (8) by described Inductive ballast (1).

2. split socket joint type electronic inductance ballast according to claim 1; it is characterized in that described electronic power converter (3) to be the socket cap with stop voltage protector (5) and can overlap to wear and be connected T5 fluorescent tube (4): there are two of two jacks and the T5 fluorescent tube one end pin couplings of pegging graft its socket cap the inner, and socket cap outer end have two peg graft pin can with base (2, the 6) coupling that is fixed on the Fluorescent Light and Fixtures (9).

3. split socket joint type electronic inductance ballast according to claim 2 is characterized in that having the heat radiation slotted eye on the shell of described electronic power converter (3).

4. split socket joint type electronic inductance ballast according to claim 2 is characterized in that described overcurrent protective device (8) is the small column body, its termination have two peg graft pin can with the starter base inserting.