CN2912188Y

CN2912188Y - Electronic ballast of high voltage Na lamp

Info

Publication number: CN2912188Y
Application number: CN200620060541.4U
Authority: CN
Inventors: 叶更生
Original assignee: Ye Jianhao
Current assignee: Ye Jianhao
Priority date: 2006-06-20
Filing date: 2006-06-20
Publication date: 2007-06-13
Anticipated expiration: 2016-06-20

Abstract

The utility model provides an electronic ballast for a high-pressure sodium lamp, which includes a filter rectifier circuit 1 composed of capacitors C1-C4, inductor L1, piezoresistor DNR, and bridge rectifier BD1, wherein transformer T1-2 is connected with integrated circuit assembly IC1, MOS tube Q1 and peripheral resistors and capacitors form an active power corrector 2; transformers T2-1, T2-2, T2-3, MOS tubes Q2, Q3 and peripheral components form an off-off oscillation circuit 3; capacitor C11, voltage regulator tube ZD6, bidirectional trigger diode DB3, thyristor VS2, capacitor C12, resistor R23, booster L2-1, L2-2 form a trigger start circuit 4, the output pole 6 of the trigger start circuit 4 and the negative pole 5 of the power supply are externally connected with a high-pressure sodium lamp 7 ends. The utility model has the advantages of simple circuit design, low cost, good heat dissipation, remarkable energy saving, can be installed in a lamp for use, stable in quality, and the like.

Description

Electronic ballast of high voltage sodium lamp

Technical field

The utility model relates to a kind of ballast, relates in particular to a kind of electronic ballast of high voltage sodium lamp, belongs to field of light fittings.

Background technology

Electronic ballast of high voltage sodium lamp is the high energy-conserving product that replaces the highly energy-consuming inductance type ballast, the existing electronic ballast of high voltage sodium lamp in market at present,, for solve the ballast volume must be little and heat radiation will good problem, employed components and parts require than higher, cause the cost height of product, and ballast must hang in the open in order to heat radiation, is exposed to the sun and rain and has shortened useful life, is unfavorable for popularizing of electronic ballast of high voltage sodium lamp.Present stage, many high-pressure sodium lamps still use traditional inductance type ballast, and simultaneously, also there is the destructive problem of acoustic resonance frequency in existing product, these all influenced the electronic ballast of high voltage sodium lamp product popularize with application.

Summary of the invention

The purpose of this utility model aims to provide a kind of electronic ballast of high voltage sodium lamp that replaces traditional inductance type ballast, the employed components and parts of this electronic ballast of high voltage sodium lamp are fewer, have that the ballast volume is little, the advantage of good heat dissipation, can be contained in the light fixture to use, not influenced by adverse circumstances, life-span is long, and simultaneously, the operating frequency right and wrong of ballast are fixed, also solve the destructive problem of acoustic resonance frequency, it is simple that this circuit has circuit design, and it is low to have a cost, the measured advantage of matter.

The purpose of this utility model is achieved in that a kind of electronic ballast of high voltage sodium lamp, comprise by capacitor C 1 ~ C4, inductance L 1, piezo-resistance DNR, bridge rectifier BD1 and form filter rectifier, wherein: transformer T1-2 and molectron IC1, metal-oxide-semiconductor Q1 and peripheral resistance, electric capacity are formed active power adjuster, the wherein 1 foot control system metal-oxide-semiconductor Q1 grid of molectron IC1; Transformer T2-1, T2-2, T2-3 and metal-oxide-semiconductor Q2, Q3 and peripheral cell are formed the switch oscillation circuit, and wherein T2-2, T2-3 control metal-oxide-semiconductor Q2, Q3 grid respectively; Capacitor C 11, voltage-stabiliser tube ZD6, bidirectional trigger diode DB3, controllable silicon VS2, capacitor C 12, resistance R 23, stepup transformer L2-1, L2-2 form trigger starting circuit, and the output stage of trigger starting circuit and power cathode be external high-pressure sodium lamp two ends respectively.

The utlity model has following advantage: have that circuit design is simple, cost is low, good heat dissipation, obvious energy conservation, can be contained in and use in the light fixture and advantages such as steady quality.

Description of drawings

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

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done further detailed being described as follows:

As shown in Figure 1: a kind of electronic ballast of high voltage sodium lamp, comprise by capacitor C 1 ~ C4, inductance L 1, piezo-resistance DNR, bridge rectifier BD1 and form EMI filter rectifier 1, transformer T1-2 and molectron IC1, metal-oxide-semiconductor Q1 and peripheral resistance, electric capacity are formed active power adjuster 2, the wherein 1 foot control system metal-oxide-semiconductor Q1 grid of molectron IC1; Transformer T2-1, T2-2, T2-3 and metal-oxide-semiconductor Q2, Q3 and peripheral cell are formed switch oscillation circuit 3, and wherein T2-2, T2-3 control metal-oxide-semiconductor Q2, Q3 grid respectively; Capacitor C 11, voltage-stabiliser tube ZD6, bidirectional trigger diode DB3, controllable silicon VS2, capacitor C 12, resistance R 23, stepup transformer L2-1, L2-2 form trigger starting circuit 4, the output stage 6 and power cathode 5 external high-pressure sodium lamps 7 two ends of trigger starting circuit 4.

Operation principle of the present utility model is such: input ac voltage is after circuit EMI filtering; half-sinusoid direct voltage through bridge rectifier BD1 output 100Hz; this voltage is input to the T-2 transformer; through 2 outputs of active power adjuster; and through the Q2 of booster diode D1 to switching circuit; the Q3 high-power MOS tube provides DC power supply stably; Q2; Q3 is at the elementary winding T2-1 of pulse transformer magnet ring and two winding T2-2; export high-frequency current to high-pressure sodium lamp under the effect of T2-3; it is luminous that it is lighted; Q2; ZD2 ~ ZD5 between the grid of Q3; controllable silicon VS1 and capacitor C 13; resistance R 19; R20; be metal-oxide-semiconductor Q2; the current foldback circuit of Q3; work as Q2; when the operating current of Q3 transships; the pressure drop of R20 raises; the conducting that is triggered of the control utmost point of VS1; voltage descends between the Q2 grid; Q2; the operating current of Q3 descends; thereby protect not reason overcurrent and damaging of two switching tubes; C11 starts electric capacity; it and ZD6; R23; R24; DB3; VS2; and L2-1; the L2-2 starting transformer choking-winding of holding concurrently is formed trigger starting circuit jointly; when the ballast energized; electric current is from series capacitance C8; the anode of C9 sets out; through R14; R21 is to capacitor C 11 chargings; when the integral voltage on the C11 reaches a certain value; ZD6 voltage-stabiliser tube in the sub-assembly is reversed the puncture conducting; the also conducting of the trigger electrode of VS2 thereupon being triggered; C11 and C8; C9 is simultaneously to L2-1; the secondary winding that rises of L2-2 discharges; L2-1; the secondary voltage of L2-2 reaches more than the 3Kv, and it is luminous that high-pressure sodium lamp is lighted.After sodium vapor lamp was lighted, starter stopped to trigger.L2-1, L2-2 become chokes and enclose the ballast effect.It is simple that this circuit has circuit design, and cost is low, and volume is little, good heat dissipation, can be contained in the advantage of using in the light fixture, simultaneously, also solves the destructive problem of acoustic resonance frequency well, and this product has market prospects preferably.

Claims

1. An electronic ballast for a high-pressure sodium lamp, comprising a filter rectifier circuit (1) composed of capacitors C1 to C4, inductor L1, varistor DNR, and bridge rectifier BD1, characterized in that: transformer T1-2 is combined with an integrated circuit IC1, MOS transistor Q1, and peripheral resistors and capacitors form an active power corrector (2), wherein pin 1 of integrated circuit assembly IC1 controls the gate of MOS transistor Q1; transformers T2-1, T2-2, T2-3 and MOS tubes Q2, Q3 and peripheral components form a switch oscillation circuit (3), wherein T2-2, T2-3 respectively control the gates of MOS tubes Q2 and Q3; capacitor C11, voltage regulator tube ZD6, bidirectional trigger diode DB3, thyristor VS2, capacitor C12, resistor R23, booster L2-1, L2-2 form a trigger start circuit (4), the output pole (6) of the trigger start circuit (4) and the negative pole of the power supply (5) are externally connected with a high pressure sodium lamp (7) ends.