CN201243398Y

CN201243398Y - Electric ballast of electrodeless energy-saving lamp

Info

Publication number: CN201243398Y
Application number: CNU2008200401365U
Authority: CN
Inventors: 王有锁; 王友保
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-27
Filing date: 2008-06-27
Publication date: 2009-05-20
Anticipated expiration: 2018-06-27

Abstract

An electronic amperite for an electrodeless energy-saving lamp is characterized in that a circuitry of the electronic amperite includes a filtering rectification circuit, a passive power factor correcting circuit, a high-frequency oscillating circuit and an output filter circuit; wherein the filtering rectification circuit consisting of a lowpass filterL1 and rectifying diodesD1-D4 provides DC working power; the passive power factor correcting circuit consisting of tracing diodes D5-D7 and output capacitorsC1-C2 converts the rectified voltage into high power factor above 0.85; and the high-frequency oscillating circuit adopts MOS electric power field effect transistors Q1,Q2 and improves the working frequency of the energy-saving lamp to above 2.5MHz. The electronic amperite is concise in circuitry and reliable in performance and has no stroboscopic problems and is not easy to be damaged.

Description

Electrodeless energy-saving lamp electronic ballast

Technical field

The utility model relates to electric ballast, a kind of energy-saving lamp electronic ballast of more specifically saying so.

Background technology

As shown in Figure 1, to be top lamp holder 1 be connected with the dividing plate 3 of bottom fluorescent lamp bulb 5 by therebetween the version that a kind of electrodeless electricity-saving lamp is arranged, and the electric ballast 2 that is arranged in lamp holder 1 is fixedly installed on the dividing plate 3; Fluorescent lamp bulb 5 with discharging chamber 6 central authorities of portion within it has caveli 8, inserted solenoid 7 in the caveli 8, solenoid 7 is to be the core pipe with step aluminum pipe 4, step aluminum pipe 4 forms heat radiation chamber 9 with the big footpath step pipe of its afterbody in caveli 8, thermal window 11 is set on the dividing plate 3, and the heat radiation chamber 9 at step aluminum pipe 4 places is by thermal window 11 and external communications; Electric ballast 2 is electrically connected by being connected lead 10 with solenoid 7.This form be with the solenoid that places the bulb outside replace traditional energy-saving lamp place in the fluorescent tube body electrode and filament, make electricity-saving lamp no longer be subjected to placing restrictions on of useful life because of filament.Electric ballast is the necessary component of electricity-saving lamp,

The electric ballast of traditional energy-saving lamp is to adopt the normal transistor technology, and frequency of oscillation is low, mostly is below the 200KHz, and there is certain scintillation in light, allows the tired consumptive disease of human eye easily, even because stroboscopic effect causes eyesight to descend.On the other hand, aspect drive circuit, normal transistor is to utilize the signal voltage be added on the emitter junction with the flow through junction current of emitter junction of change, comprise that also minority carrier gets over very complicated mechanisms such as entering collector region behind the base, circuit reliability is bad, damages easily, in actual use, it is comparatively frequent to change lamp, thereby occurs using electricity-saving lamp not save the phenomenon of money.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology weak point, provides that a kind of circuit is succinct, reliable operation, does not have the stroboscopic problem, do not allow flimsy electrodeless energy-saving lamp electronic ballast.

The utility model technical solution problem adopts following technical scheme:

The utility model characteristics are to comprise filter rectifier in its circuit structure, be arranged on passive power factor correcting circuit in the filter rectifier output loop, be the high-frequency oscillating circuits of operating voltage and be arranged on output filter circuit in the high-frequency oscillating circuits output loop with the passive power factor correcting circuit output voltage; Wherein, the filter rectifier of being made up of low pass filter L1 and rectifier diode D1-D4 provides dc supply; By the voltage transformation of the passive power factor correcting circuit of forming by stream diode D5-D7, output capacitance C1-C2 after with rectification is that High Power Factor is more than 0.85; Adopt MOS field of electric force effect transistor Q1, Q2 in the high-frequency oscillating circuits, and the operating frequency of lifting electricity-saving lamp is more than 2.5MHz.

The current foldback circuit that design feature of the present utility model also is surge absorbing circuit that the signal output part setting at filter rectifier is made of NTC thermistor R1, is made of fuse F1, and the abnormal protection auxiliary circuit that is made of the PTC thermistor is set in output filter circuit.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model adopts the field of electric force effect transistor, and the operating frequency of electricity-saving lamp is risen to more than the 2.5MHz, has thoroughly solved the stroboscopic problem of electricity-saving lamp, and has significantly improved integrity problem, the photoelectric conversion efficiency problem of energy-saving lamp electronic ballast.

2, the field of electric force effect transistor that the utility model adopted is a kind of voltage control device of one pole type, self-switching-off capability is not only arranged, and there is driving power little, characteristics such as switching speed height, no second breakdown, safety operation area are wide, this make electricity-saving lamp reliability significantly improve, the whole lamp life-span is longer, and average life span can reach more than 100,000 hours.

3, the utility model can prevent effectively that by perfect abnormity protection circuit is set abnormal conditions such as bulb gas leakage, breakage, startup failure, short circuit from causing electric ballast to be damaged because of overload in electric ballast.

4, the utility model electronic device quantity is few, circuit is succinct, failure rate is low, cost is low, helps penetration and promotion, helps suitability for industrialized production, helps promoting the smooth implementation of green illumination plan.

Description of drawings

Fig. 1 be the utility model at electrodeless electricity-saving lamp internal structure schematic diagram;

Fig. 2 is the utility model circuit theory diagrams.

Number in the figure: 1 top lamp holder, 2 electric ballasts, 3 dividing plates, 4 step aluminum pipes, 5 fluorescent lamp bulbs, 6 discharging chambers, 7 solenoids, 8 cavelis, 9 heat radiation chambeies, 10 leads, 11 thermal windows.

Below by embodiment, the utility model is described in further detail in conjunction with the accompanying drawings

Embodiment

Referring to Fig. 2, electrodeless energy-saving lamp electronic ballast comprises filter rectifier, passive power factor correcting circuit, high-frequency oscillating circuits and output filter circuit in the present embodiment in its circuit structure; Wherein, the filter rectifier of being made up of low pass filter L1 and rectifier diode D1-D4 provides dc supply; By the voltage transformation of the passive power factor correcting circuit of forming by stream diode D5-D7, output capacitance C1-C2 after with rectification is that High Power Factor is more than 0.85; Adopt MOS field of electric force effect transistor Q1, Q2 in the high-frequency oscillating circuits, and the operating frequency of lifting electricity-saving lamp is more than 2.5MHz; The surge absorbing circuit that setting is made of NTC thermistor R1, the current foldback circuit that constitutes by fuse F1, and the abnormal protection auxiliary circuit that constitutes by the PTC thermistor.

After the electricity-saving lamp energising, the start impulse current is at first absorbed by NTC thermistor R1, after inductance L 1 filtering, the full-bridge rectification of being built by rectifier diode D1-D4, being that the passive power factor correcting circuit of the core voltage transformation after rectification becomes High Power Factor more than 0.85 by stream diode D5-D7, galvanic current is pressed, charge to capacitor C 3 by resistance R 2-R3 then, when charging voltage rises to diac D8-D9 threshold voltage, diac D8-D9 conducting, the N1 winding of high frequency transformer T1 obtains pumping signal, N2, the driving voltage that therefore the N3 winding produces is behind voltage stabilizing didoe D11-D14 amplitude limit, driving is serially connected with the metal-oxide-semiconductor Q1-Q2 alternation on the circuit, be that oscillating circuit produces higher-order of oscillation 2.65MHz, vibration output is through inductance L 2, magnetic core in capacitor C 4-7 driving fluorescent lamp bubble concave cavity produces alternating magnetic field, ionization takes place in inert gas in the fluorescent lamp bulb under the excitation of magnetic field energy, discharge plasma, plasma is when returning ground state, discharge the 253.7nm ultraviolet ray, three primary colors fluorescent powder is subjected to ultraviolet irradiation and luminous in the bulb.Owing to adopted the high-frequency inversion technology, electrodeless electricity-saving lamp no longer includes stroboscopic phenomenon, and the light efficiency of bulb has had significant raising, compare with traditional energy-saving lamp, identical wattage has higher brightness, can obviously improve lighting quality, improve people's inhabitation, working and learning environment.

Claims

1, electrodeless energy-saving lamp electronic ballast is characterized in that comprising filter rectifier in its circuit structure, is arranged on passive power factor correcting circuit in the filter rectifier output loop, is the high-frequency oscillating circuits of operating voltage and is arranged on output filter circuit in the high-frequency oscillating circuits output loop with described passive power factor correcting circuit output voltage; Wherein, the filter rectifier of being made up of low pass filter L1 and rectifier diode D1-D4 provides dc supply; By the voltage transformation of the passive power factor correcting circuit of forming by stream diode D5-D7, output capacitance C1-C2 after with rectification is that High Power Factor is more than 0.85; Adopt MOS field of electric force effect transistor Q1, Q2 in the high-frequency oscillating circuits, and the operating frequency of lifting electricity-saving lamp is more than 2.5MHz.

2, electrodeless energy-saving lamp electronic ballast according to claim 1; the current foldback circuit that it is characterized in that surge absorbing circuit that the signal output part setting at described filter rectifier is made of NTC thermistor R1, constitutes by fuse F1, and the abnormal protection auxiliary circuit that is made of the PTC thermistor is set in described output filter circuit.