CN2304225Y

CN2304225Y - High-efficient energy-saved electronic ballast for fluorescent lamp

Info

Publication number: CN2304225Y
Application number: CN 97240936
Authority: CN
Inventors: 蒋作林; 雷达
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-13
Filing date: 1997-06-13
Publication date: 1999-01-13
Anticipated expiration: 2007-06-13

Abstract

The utility model relates to a lighting lamp fitting, and is a high-efficient energy-saved electronic ballast for fluorescent lamps. A control circuit composed of diodes, triodes, resistors, capacitors and coils is arranged in the ballast; the control circuit is composed of five parts: a high frequency filter part, a rectification part, a power factor correcting part, a frequency-changing oscillation part and a series resonant part. The high-efficient energy-saved electronic ballast is arranged between a power supply and a fluorescent lamp tube, and gathers the functions of general ballasts and glow starters into one body. The utility model has the characteristics of high efficiency and energy saving, and is capable of normally working in the states of 75-250V AC voltage and-35-50 DEG C temperature. The power factor is up to more than 0.9.

Description

The energy-efficient electric ballast of fluorescent lamp

The utility model relates to lighting, is the electric start parts of the configurable use of fluorescent lamp.

At present, the starting component of general adapted is ballast and starter on the fluorescent lamp of China, and by standard GB 2313 regulations, the starting resistor of ballast is 180-250V, and working temperature is 10-50 ℃, power factor about 0.5.

The purpose of this utility model provides a kind of energy-efficient electric ballast of fluorescent lamp, and it integrates general ballast and the two function of starter, and working properly in the low-voltage low-temperature condition, power factor reaches more than 0.9.

The purpose of this utility model is to realize like this, be provided with the control circuit of forming by diode, triode, resistance, electric capacity, coil in the energy-efficient electric ballast of fluorescent lamp, it is arranged between AC power and the fluorescent tube, control circuit is made up of high-frequency filter circuit, rectification circuit, circuit of power factor correction, oscillation inverter circuit and series resonant circuit five parts, wherein: high-frequency filter circuit is by capacitor C 1, and C2 and coil L1 constitute; Rectification circuit is by diode D1, D2, D3, the bridge rectifier that D4 constitutes; Circuit of power factor correction is by D5, D6, and D7, C3, C4 and resistance R constitute; The oscillation inverter circuit is by triode BG1, BG2, transformer n1, and n2, n3, resistance R 1, R2, R3, R4, R5 and capacitor C 6, C8, C9 constitutes; Series resonant circuit is made of choke L2, thermistor PTC, capacitance C5 and startup capacitor C 7.

Characteristics of the present utility model are: energy-efficient, and be working properly in 75-250V temperature-35-+50 ℃ the state at alternating voltage, power factor reaches more than 0.9.

Embodiment further describes below in conjunction with accompanying drawing, and Fig. 1 is circuit theory diagrams of the present utility model, and Fig. 2 is a frame principle figure of the present utility model.

Embodiment: is example with the utility model adapted at the 40W fluorescent tube, referring to Fig. 1 Fig. 2, D1, D2, D3, D4, D5, D6, all select the IN4007 diode for use with D7, D8 and D9 then use the IN4148 diode, and L1 is the double-deck coilings of φ 0.25MM enamelled wire 90 circles, L2 is the 120 circle individual layer coilings of φ 0.38 enamelled wire, n1 and n2 are the 0.12 sub-thread coiling of 3 circles, and n3 then is the 0.12 sub-thread coilings of 5 circles, and C1 and C2 electric capacity are 100n/250V, C3 and C4 are the 2.2-4.7u/400V electrochemical capacitor, C5 is 100n/400V, and C6 is 3n3/400V, and C7 is 10n/630V, C8 and C9 then are the 1u/50V electrochemical capacitor, R is 47 Ω 1W, and R1 and R2 are 22 Ω 0.25W, and R3 and R4 are 1MO.25W, R5 and R6 are 5.1 Ω 0.25W, and other component parameters and element connect all sees Fig. 1.

Narrate circuit working situation of the present utility model now in conjunction with the accompanying drawings, connect when power supply 1, the 220V alternating current is through fuse R _DWith high-frequency filter circuit 2, purpose is to reduce high order harmonic component, reduces electric network pollution, passes through rectification circuit 3 again, two ends produce the direct voltage of about 310V, in circuit of power factor correction 4, commutating voltage is by C3, R, when D6 and the charging of C4 series circuit, because the forward resistance of D6 is very little, C3, the voltage on the C4 are charged to power frequency civil power V very soon _ACCrest voltage V _m1/2, at this moment, load is mainly by commutating voltage power supply, when the instantaneous value of commutating voltage is lower than crest voltage V _m1/2 o'clock, C3, C4 be by D5, the D7 parallel discharge, load is powered by capacitance voltage.So, go round and begin again, the voltage value that obtains is than adopting single electrochemical capacitor filtering little (being about 230V), and ripple obviously increases, input current I _ACWaveform be tending towards continuous, thereby reduced high order harmonic component widely, improved power factor, the direct voltage that enters oscillation inverter circuit 5 is through R3, R4 is to BG1, BG2, alternate conduction, the output square wave pulse voltage, for fluorescent lamp provides high frequency electric source, at BG1, in the driving loop of BG2, respectively and be connected to D8, R1 and D9, R2 is to BG1, the turn-off time of BG2 plays acceleration and suppresses temperature rise, at room temperature, PTC temperature-sensitive element resistance is very little, when electric current passes through, its resistance sharply increases to more than the 10M Ω, this moment, the heater current capacitor C 7 of almost all flowing through made C5, C7 immediately, the series resonant circuit 6 at L2 place vibrates, produce high voltage at the C7 two ends, some fluorescent lamp 7 is behind the fluorescent start, choke L2 prevents that electric current is excessive and plays the ballast effect, guarantee the fluorescent lamp operate as normal, behind present embodiment and the 40W fluorescent tube adapted, after tested, to be the 75-250V temperature all can start fluorescent lamp to alternating voltage in the time of-35-+50 ℃, start-up time≤0.4 second, during the fluorescent lamp normal illumination, operating current is about 190MA, temperature raises≤10 ℃, start reliably, power factor is more than 0.92, and energy-saving effect is remarkable, on other fluorescent tube, the technical parameter of some elements should change the utility model as if adapted.In the use, if the subelement in the control circuit is combined as integration module, just gives and install, maintenance brings bigger convenience.

Claims

Be provided with the control circuit of forming by diode, triode, resistance, electric capacity, coil in the energy-efficient electric ballast of fluorescent lamp, it is arranged between AC power 1 and the fluorescent tube 7, it is characterized in that: control circuit is made up of high-frequency filter circuit 2, rectification circuit 3, circuit of power factor correction 4, oscillation inverter circuit 5 and series resonant circuit 6 five parts, wherein: high-frequency filter circuit is by capacitor C 1, and C2 and coil L1 constitute; Rectification circuit is by diode D1, D2, D3, the bridge rectifier that D4 constitutes; Circuit of power factor correction is by D5, D6, and D7, C3, C4 and resistance R constitute; The oscillation inverter circuit is by triode BG1, BG2, transformer n1, and n2, n3, resistance R 1, R2, R3, R4, R5 and capacitor C 6, C8, C9 constitutes; Series resonant circuit is made of choke L2, thermistor PTC, capacitance C5 and startup capacitor C 7.