Electronic stabilizer and control method thereof
An electronic ballast and circuit technology, applied in control/regulation systems, instruments, electric light sources, etc., can solve problems such as filament power dissipation
Inactive Publication Date: 2009-11-18
DELTA ELECTRONICS INC
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Problems solved by technology
Except that the operation of the electronic ballast 20 is still divided into two stages similar to the aforementioned, it also has the same disadvantage as the aforementioned, that is, the problem of filament power loss during the steady-state operation of the fluorescent lamp
Method used
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Embodiment Construction
[0063] see image 3 , which is the circuit structure diagram of the first preferred embodiment of the electronic ballast of the present invention; wherein the electronic ballast 30 is composed of a preheating inductance 31, a first resonant circuit 32, a second resonant circuit 33, and a starting circuit 34 Constructed to provide electric energy to the fluorescent lamp circuit 35 .
[0064] A general preheating fluorescent lamp circuit includes at least one fluorescent lamp and at least one preheating coil. In this embodiment, the fluorescent lamp circuit 35 includes two fluorescent lamps 351, 352 and three preheating coils 353, 354, 355. 352 are connected in series with each other, and the number of coils of the preheating coils 353, 354, and 355 is the same.
[0065] The first resonant circuit 32 includes a first resonant capacitor 321 and a first resonant inductance 322, the first resonant capacitor 321 is connected in series with the first resonant inductance 322, the fir...
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An electronic ballast is used to provide electric energy to a fluorescent lamp circuit, the electronic ballast includes: a preheating inductance; a first resonant circuit connected in parallel to the preheating inductance and coupled to the fluorescent lamp circuit, the first resonant The circuit is to preheat the fluorescent lamp circuit according to a first resonant frequency; a second resonant circuit is coupled to the fluorescent lamp circuit and excites the fluorescent lamp circuit according to a second resonant frequency; and a starting circuit is coupled to the fluorescent lamp circuit. The second resonant circuit provides electric energy respectively and continuously to the first resonant circuit and the second resonant circuit according to the first resonant frequency and the second resonant frequency. The resonant capacitor in the above resonant circuit has lower voltage stress, and only need to add a low-voltage switch to cut off the current flowing through the filament, and the power loss of the fluorescent lamp is lower when it is in the luminous state.
Description
technical field [0001] The invention relates to an electronic ballast and a control method thereof, in particular to an electronic ballast applied to a fluorescent lamp and a control method thereof. Background technique [0002] Fluorescent lamp is a kind of lamp with a small amount of mercury in the lamp tube and a layer of phosphorescent material coated on the inside of the tube wall. At low pressure, part of the mercury will vaporize in the lamp tube, and the filaments (cathode) at both ends of the lamp tube will also be damaged by heat. Electrons are released inside the lamp to ionize the mercury vapor inside the lamp. The voltage difference between the two ends of the lamp tube makes the mercury ions conduct electricity, and then produces white light discharge to emit ultraviolet light. The ultraviolet light will be absorbed by the phosphorescent substance inside the tube wall, and then emit visible light. [0003] As we all know, regardless of whether the electronic b...
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IPC IPC(8): H05B41/298G05F1/00
Inventor 胡小巨刘晨阳应建平
Owner DELTA ELECTRONICS INC