CN2433798Y - T5 electronic ballast for high-efficient fluorescent lamp - Google Patents

Abstract

The utility model relates to a T5 electronic ballast for a high-efficient fluorescent lamp. The utility model is characterized in that alternating current is formed into high-frequency filtering by capacitors C1-C3 and diodes D5-D7 through bridge type ballasting to be connected with power tubes T1, T2; T1 and T2 are conducted by turns by a voltage stabilizing tube D8, a resistor R2, an inductor L3, a voltage stabilizing tube D9, R3, and L4; a trigger circuit which is composed of trigger tubes D10, D11, D12, R4, and C5 is connected with a high-frequency circuit which is composed of L5, L6, and C6; at the same time, starting capacitors C7-C8 and a thermal resistor PTC are connected with a lamp holder.

Description

High efficiency fluorescent lamp T 5Electric ballast

The utility model relates to the fluorescent lighting technical field, is specifically to finish startup, rectification, the power supply of fluorescent lamp by electric ballast, and realizes energy-conservation, as to improve luminous benefit function, is applicable to the T that power supply voltage range is wide ₅Series and other serial fluorescent lamp starting devices.

Fluorescent lamp is over coming out surplus in the of 40 year, adopt traditional inductance type ballast always, and be equipped with starter as starting and the current stabilization annex, this type of ballast volume is big, Heavy Weight, oneself power consumption are big, noise is arranged, also produce distinctive stroboscopic phenomenon simultaneously, human eyesight is exerted an influence at lighting process.The fluorescent lamp circuit of present this configuration is just experiencing the tide of a change, promptly replaces traditional inductance type ballast with electric ballast.Along with energy savings more and more is subjected to common concern, for the luminous benefit that makes fluorescent tube further improves, the diameter of fluorescent tube is more and more thinner, from original T ₁₂Develop into T ₈, further develop T again ₅, realize that luminous benefit is more and more higher, and suitable therewith high-efficiency electronic ballast particularly is suitable for T ₅The quality good electron ballast of fluorescent tube does not solve as yet at all, gives energy-saving T ₅Applying of fluorescent lamp brings difficulty.

The purpose of this utility model provides a kind of have high power factor, flicker free, noiselessness, the luminous benefit of raising fluorescent lamp, ferromagnetic inductance that cancellation is big.Save a large amount of non-ferrous metals, in light weight, and can be under 150V low voltage power supply condition steady operation, be specially adapted to T ₅The high efficiency fluorescent lamp T of series fluorescent tube ₅Electric ballast.

For finishing the technical scheme that above-mentioned purpose is taked: the 220V power supply passes through inductance L ₁Through diode D ₁～D ₄The bridge-type ballast becomes direct current through inductance L ₂Capacitor C ₁～C ₃, diode D ₅～D ₇High frequency filter connects inverter power tube T ₁And T ₂, T ₁And T ₂Through voltage-stabiliser tube D ₈, resistance R ₂, inductance L ₃With voltage-stabiliser tube D ₉, R ₃, L ₄In turn with T ₁With T ₂Conducting is via trigger tube D ₁₀With diode D ₁₁～D ₁₂, R ₄, C ₅And Filament of fluorescent lamp is formed the circuits for triggering connection by L ₅And L ₆, C ₆The high-frequency oscillating circuits of forming also connects lamp socket, simultaneously by starting capacitor C ₇～C ₈RTC is connected lamp socket with thermistor, and lamp socket connects from resetter RT in addition, connects capacitor C by RT ₄And R ₁The higher-order of oscillation electric current of forming.

During the utility model filament burn out, ballast trigger tube D ₁₀Quit work, reach automatic protective effect, capacitor C is set ₃Adopt high frequency feedback to improve circuit power, reduce the current harmonics total amount, adopt simultaneously, substitute traditional controllable silicon, transistor, resistance, electric capacity, voltage-stabiliser tube and diode, improve the stability of product from resetter RT.

The utility model embodiment is described in detail in conjunction with the accompanying drawings.

Fig. 1 is the utility model line map.

According to shown in Figure 1, this electric ballast is established bridge rectifier D ₁～D ₄, to the full-wave rectification of input 220V AC power, through diode D ₅, D ₇, spouting becomes power tube T ₁, T ₂Make diac D ₁₀Conducting, L ₃Last induced potential makes high frequency swing circuit L ₅, L ₆, C ₆Start, treat C ₅Charging back D ₁₀The trigger tube reverse-conducting, L ₄Back-emf make oscillating circuit L ₅, L ₆, C ₆Produce the higher-order of oscillation of 45KHZ, generation moment, nearly 1000V high pressure made T through thermistor PTC ₅The fluorescent tube soft start is lighted, and high frequency returns current feed circuit C ₃Improve lamp current crest ratio, improved circuit power factor and improve the current harmonics total amount, improved the ballast electrical performance indexes.

This electric ballast is provided with two layers of fault secure circuit.When output open circuit (is unkitted T ₅Fluorescent tube or filament dress silk) circuits for triggering interrupt the time, and the high-frequency inversion power tube can not start can produce the higher-order of oscillation, thereby protects this electric ballast to be in halted state; When the output circuit short circuit, RT finishes function from resetter, and high-frequency oscillating circuits failure of oscillations electric ballast can not burnt, and also can not influence the work of external circuits.

The circuits for triggering of this electric ballast also play the intact function of automatic detection fluorescent tube filament, can not constitute complete circuit if any damaged then circuits for triggering.

Replace elements such as the controllable silicon that common testing circuit used, transistor, voltage-stabiliser tube, coil, resistance, electric capacity, diode from resetter RT, and removed the debugging work of failure detector circuit from.

This electric ballast is in the use noiseless, and it is wide that flicker free is suitable for the voltage range of powering.

Claims (1)

1, a kind of high efficiency fluorescent lamp T ₅Electric ballast is characterized in that the 220V power supply passes through inductance L ₁Through diode D ₁～D ₄The bridge-type ballast becomes direct current, through inductance L ₂, capacitor C ₁～C ₃, diode D ₅～D ₇High frequency filter connects inverter power tube T ₁And T ₂, T ₁And T ₂Through voltage-stabiliser tube D ₈, resistance R ₂, inductance L ₃With voltage-stabiliser tube D ₉, R ₃, L ₄In turn with T ₁With T ₂Conducting is via trigger tube D ₁₀And D ₁₁～D ₁₂, R ₄, C ₅And Filament of fluorescent lamp is formed the circuits for triggering connection by L ₅And L ₆, C ₆The high-frequency oscillating circuits of forming connects lamp socket, simultaneously by starting capacitor C ₇～C ₈PTC is connected lamp socket with thermistor, and lamp socket connects from resetter RT in addition, connects capacitor C by RT ₄And R ₁The higher-order of oscillation electric current of forming.

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