CN2205092Y - Electionic ballast for high voltage sodium lamp - Google Patents

Abstract

The utility model belongs to an electronic ballast for a high voltage sodium lamp. The utility model also adopts a general high frequency electronic ballast, the utility model is characterized in that a power supply L C power factor raising circuit and a high voltage pulse current generating and triggering self control circuit are adopted by the utility model. The utility model has a small volume and light weight, the power factor of the utility model can be more than 0.99, the utilization ratio of electrical energy is high, the electricity can be saved by 10% to 30%, and the cost of the utility model is lower than an induction ballast.

Description

Electionic ballast for high voltage sodium lamp

The utility model relates to a kind of lighting source ballast, especially high-voltage sodium lamp ballast.

Gaseous discharge lamp, the especially ballast of high-pressure sodium lamp adapted all are inductance type ballasts at present.And the electric ballast of fluorescent lamp adapted, output must not be opened a way and short circuit, otherwise promptly burns out ballast in the duration of short circuit.These two kinds of ballasts exist following weak point:

1, the inductance type ballast volume is big, weight is big, power factor is low, have only about 0.44, thereby utilization rate of electrical is low, and industrial frequency noise is big, and illumination has tangible stroboscopic effect.

2, electronic ballast for fluorescent lamp power factor lifting circuit element is many, and relative failure frequency is also high, and the 2-3 that overall cost is an Inductive ballast doubly.

The purpose of this utility model is to overcome above-mentioned weak point, and a kind of novel electron ballast of high-pressure sodium lamp adapted is provided.

To achieve these goals, the utility model is realized by following measure: except that adopting general high-frequency electronic ballast, the design core that is different from prior art is to adopt by power supply L.C power factor to promote and the high-voltage pulse generation, triggers from controlling circuit.Electronic ballast of high voltage sodium lamp, it comprises parts such as rectification, filtering, the higher-order of oscillation, a termination input terminal 1 that it is characterized in that inductance L 1, the input of another termination rectifier bridge D1-4 is formed L, C series resonance power factor lift portion with rectifier bridge D1-4, capacitor C 1, C2; Resistance R 6, the output of the termination rectifier bridge D1-4 of R7, capacitor C 4, C5, the controllable silicon SCR negative electrode is connected with rectifier bridge D1-4 output mutually and after connecing, resistance R 6 lower ends, an end of the winding L 5 of termination high pressure ballast transformer B2 on the capacitor C 4, another termination controllable silicon SCR anode of L5, winding L 4 one termination lead-out terminals 1, the other end is connected with the winding L 3 of feedback transformer B1, resistance R 7 lower ends, capacitor C 5 upper ends, the upper end of diode D9 and diac D10 interconnects, termination controllable silicon SCR trigger electrode under the diac D10, diode D9 negative pole connects winding L 3, has formed high-voltage pulse and has produced and trigger the automatic control part.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is circuit theory diagrams of the present utility model.

Referring to Fig. 1, parts such as rectification, filtering, the higher-order of oscillation have been formed by rectifier bridge D1-4, capacitor C 1, C2, C3, resistance R 1, R2, R3, R4, R5, diode D5, D6, D7, D8, triode T1, T2 etc.By inductance L 1, high frequency ballast transformer B2, controllable silicon SCR, capacitor C 4, C5, resistance R 6, R7 feedback transformer B1, diode D9, D10 etc. form the power factor lifting and high-voltage pulse power source produces, and trigger automatic control circuit.By input 1-2 two termination 220V, 50HZ single-phase alternating current, inductance L 1 plays the harmonic filtration effect, and simultaneously with rectifier bridge D1-4, capacitor C 1, C2 form the L.C series resonance, make it reach the resistive load characteristic, play the effect that improves power factor.The AC rectification of rectifier bridge D1-4 to passing through divided voltage-type filtering equally by what capacitor C 1, C2 formed.Triode T1, T2, capacitor C 1, C2 have formed the semibridge system high-frequency generator.Capacitor C 4 is through resistance R 5 charging, and capacitor C 5 is through resistance R 7 chargings, and when capacitor C 5 charging both end voltage reach 30V when above, diac D10 conducting triggers controllable silicon SCR and leads energy.This moment, capacitor C 4 was discharged by the L5 winding of high-voltage pulse ballast transformer B2, and voltage can reach more than the 250V, produced the 4000V high voltage simultaneously at L4 winding two ends, triggered through lead-out terminal 1 and lighted high-pressure sodium lamp.Behind the high-pressure sodium lamp ignition, produce lower ends for negative in feedback transformer B1 winding L 2, the upper end is positive voltage, makes triode T2 conducting, when the B1 magnetic flux is full close after T2 end.Produce simultaneously the upper end at L1 winding two ends for just, the lower end is a negative voltage, makes triode T1 conducting, and magnetic flux is full once more closes T1 and end for B1 simultaneously, magnetic flux change direction, and vibration continues.When triode T2 conducting, the e utmost point and c electrode potential drop to 1.5-2V, and diode D9 conducting simultaneously can not set up capacitor C 5 two ends and is higher than the voltage that makes diode D10 conducting, and controllable silicon is closed, and has played triggering automatic control effect.

Claims (1)

1, a kind of electronic ballast of high voltage sodium lamp, it comprises parts such as rectification, filtering, the higher-order of oscillation, a termination input terminal 1 that it is characterized in that inductance L 1, the input of another termination rectifier bridge D1-4 is formed L.C series resonance power factor lift portion with rectifier bridge D1-4, capacitor C 1, C2; Resistance R 6, the output of the termination rectifier bridge D1-4 of R7, capacitor C 4, C5, the controllable silicon SCR negative electrode is connected with rectifier bridge D1-4 output mutually and after connecing, resistance R 6 lower ends, an end of the winding L 5 of termination high pressure ballast transformer B2 on the capacitor C 4, another termination controllable silicon SCR anode of L5, winding L 4 one termination lead-out terminals 1, the other end is connected with the winding L 3 of feedback transformer B1, resistance R 7 lower ends, capacitor C 5 upper ends, the upper end of diode D9 and diac D10 interconnects, termination controllable silicon SCR trigger electrode under the diac D10, diode D9 negative pole connects winding L 3, has formed high-voltage pulse and has produced and trigger the automatic control part.

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