CN2673027Y

CN2673027Y - Double frequency electronic trigger

Info

Publication number: CN2673027Y
Application number: CN 200320108331
Authority: CN
Inventors: 顾长生
Original assignee: SHUNYIFANG ELECTRONIC CO Ltd WUXI CITY
Current assignee: SHUNYIFANG ELECTRONIC CO Ltd WUXI CITY
Priority date: 2003-11-25
Filing date: 2003-11-25
Publication date: 2005-01-19
Anticipated expiration: 2013-11-25

Abstract

The utility model relates to a double frequency electronic trigger which is formed by that a level controller, a bidirectional breakdown diode, a pulse transformer, a two-frequency generator and an energy release capacitor are connected together by a circuit. More than three pulse energy whose occurring electric angle approaches 90 DEG is exported when each half-wave is produced by a power source, and each pulse is composed of two subpulses whose voltage amplitudes are similar. Thus, in the process of starting a lamp, the utility model enhances the amplitude of heated electrode in each cycle, which shortens the transient time from glow discharge to arc discharge and reduces the loss level of the material of electrode of the lamp, achieving the effect of extending the life of the actual burning lamp considerably.

Description

The double frequency electronic trigger

Technical field

The utility model belongs to the electric light source technology field, is specifically related to a kind of burning-point starting drive of high intensity discharge light source.

Background technology

High intensity discharge light sources such as high-pressure sodium lamp and metal halide lamp are all adopted in the illumination of large area regions such as airport, road, physical culture place, and burning-point all needs to dispose corresponding starting drive---electronic trigger under conventional line voltage value.The function of electronic trigger just provides an extra instantaneous high pressure at the burning-point initial stage, during the applying of this instantaneous high pressure, produces the puncture of gas, and the pulsed electron stream and the ion flow of its formation heat corresponding two electrodes respectively.Through the effect of pulse current in several voltage cycles, electrode is heated to the thermionic emission temperature, thereby enters normal arc discharge operating state.Studies show that in the glow discharge stage before electrode is not heated to the thermionic emission temperature, the electrode emitting material is because of a large amount of losses of sputter mechanism, final result causes the rapid decline of lamp useful life.Research shows that also the duration length of glow discharge in the lamp start-up course and the output parameter of electronic trigger are closely related.

Summary of the invention

The purpose of this utility model is to propose a kind of electronic trigger that is complementary with the lamp start-up course, thereby shortens the glow discharge time in the start-up course, reduces the loss of the electrode emitting material when at every turn starting, and reaches the effect in the actual burning-point life-span that prolongs lamp.

The electronic trigger of the utility model design discharges electric capacity by level controller, diac, pulse transformer, double frequency generator and energy and connects to form through circuit, as shown in Figure 1.Wherein level controller is by capacitor C ₁And C ₂Be composed in series, and be serially connected between Inductive ballast output and the zero line, adjust different numerical value and ratio between them, can obtain the pulse output of different-energy and different electrical degrees; Capacitor C ₁Primary winding L with diac S, pulse transformer ₁And double frequency generator L ₃Form LC discharge resonant tank.Work as capacitor C ₁On charging voltage value when rising to the puncture voltage of breakdown diode S, capacitor C ₁On electric flux discharge by above-mentioned loop, and in the elementary formation of pulse transformer by capacitor C ₁, primary winding L ₁With double frequency generator L ₃And loop resistance R ₁Etc. the high frequency voltage of parameter decision, again through secondary winding transformer L ₂Coupling form high-frequency and high-voltage and add on the lamp.Adjust primary winding L ₁With secondary winding transformer L ₂Ratio can obtain different output voltage values.Owing to adopted diac S, can both form above-mentioned pulse in the positive-negative half-cycle of supply voltage and produce; By selecting the breakdown voltage value of breakdown diode, i.e. the pulse of the every half cycle of may command produces number, the electrical degree of also adjustable whole pulse output; Double frequency generator L ₃Be an independent inductance,, can make and form two close pulses of voltage amplitude amplitude in each pulse, as shown in Figure 2 by selecting different inductance values.These two subpulses can both produce ionization effectively, can reach the effect of faster heating electrode producing the more pulse current of long duration in the phase weekly thus, thereby reduce the sputtering loss of electrode substance.And the too fast loss of the electrode substance main cause of the lamp lost of life just.

The electronic trigger of the utility model design can prolong effective burning-point life-span of high-intensity gas discharge lamp significantly, has played the effect of green illumination.

The electronic trigger of the utility model design is applicable to the ceramic gold-halogen lamp of 20W～400W, also is applicable to quartz metal halide lamp and the high-pressure sodium lamp of 50W～400W.

Description of drawings

Fig. 1 is a structure principle chart of the present utility model.

Fig. 2 is the double frequency waveform after each pulse of the utility model electronic trigger is amplified.

Fig. 3 is the discharge forming process with the utility model electronic trigger burning-point 400W quartz metal halide lamp.

Fig. 4 is the discharge forming process of conventional electrical trigger burning-point 400W quartz metal halide lamp.

The light decay curve of Fig. 5 for adopting 150 watts of quartz metal halide lamps of the utility model electronic trigger burning-point to measure.

Embodiment

In the utility model, when the breakdown voltage value of diac is chosen between 170V～190V, every half cycle has three main pulse outputs, and the amplitude of its high voltage pulse is adjustable between 1KV～4.5KV, and the Pulse Electric angle is between 80 °～90 ° and 260 °～270 °.Under this output parameter, get C ₁Value between 0.1 μ f～0.3 μ f, C ₂Value is between 0.15 μ f～0.47 μ f; R ₁Be protective resistance, value between 5K Ω～100K Ω, L ₃Between 50 μ H～500 μ H, L ₁/ L ₂Ratio then between 5～20.At the electronic trigger that above-mentioned parameter scope is formed, can well satisfy the requirement of the high-intensity gas discharge lamp burning-point startup of different capacity.

Further describe the utility model below by an embodiment, but be not limited to this embodiment.

Embodiment: the double frequency electronic trigger that is combined to form by following parameters: capacitor C ₁=0.104 μ f, capacitor C ₂=0.224 μ f, L ₁/ L ₂=15, diplex generator L ₃=300 μ H, the puncture voltage of breakdown diode S is 190V, connects by the circuit that carries out shown in Figure 1, promptly obtains a kind of double frequency electronic trigger.Can start the 400W quartz metal halide lamp by this trigger, the forming process of its discharge is seen Fig. 3.Be about 0.8 second the discharge time of its aura as seen from the figure, and adopt the aura duration of the same lamp of universal electronic trigger burning-point to be about 2 seconds, see shown in Figure 4.

Each startup of lamp all causes the deposition of electrode substance to the bubble wall because of the existence in glow discharge stage.The loss of electrode substance accumulation constantly descends the startability of electrode, finally can not burning-point under supply voltage and end-of-life.Electrode substance also causes the decay of light output in the continuous deposition of bubble wall.With the double frequency electronic trigger burning-point 150W Metal halogen lamp of parameter in the present embodiment, its light decay changes sees Fig. 5.Show that obviously the double frequency electronic trigger has the benefit that prolongs the lamp life-span.

Claims

1, a kind of double frequency electronic trigger is characterized in that by level controller, pulse transformer, and the double frequency breakdown diode, energy discharges electric capacity and pulse double frequency generator connects to form through circuit, and wherein, level controller is by capacitor C ₁And C ₂Be composed in series, and be serially connected between Inductive ballast output and the zero line; Capacitor C ₁, diac S, pulse transformer primary winding L ₁With double frequency generator L ₃Form LC discharge resonant tank; The secondary winding transformer L of pulse transformer ₂Be connected with lamp.

2, double frequency electronic trigger according to claim 1 is characterized in that the capacitor C of level controller ₁Value is 0.1 μ f～0.3 μ f, capacitor C ₂Value is 0.15 μ f～0.47 μ f.

3, double frequency electronic trigger according to claim 1 is characterized in that pulse transformer turn ratio L ₁/ L ₂Value between 5～20.

4, double frequency electronic trigger according to claim 1 is characterized in that L ₃Value is 50 μ H～500 μ H.

5, double frequency electronic trigger according to claim 1, when it is characterized in that puncture voltage when diac is 170V～190V, all there is the output pulse more than 3 per half period.