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Fluorescent Lamp Electronic Ballast (5)

2016-08-09 00:38  
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Fluorescent Lamp Electronic Ballast (5)
When the power is on, the 220v ac voltage will provide the high frequency oscillate circuit with 300v direct current working voltage afterit is rectificated by VD1-VD4, filtrated by C1. C3 is charged by R6 and when C3's voltage reaches V3's breakover voltage, VS will be connected quickly. C3 begins to be discharged on T's winding W3 through V3. Then V1 and V2 will be connected intermittently under the coupling of T. The high frequency oscillator will begin to work.After the oscillator begins to work, C2 will generate a high frequent alternating voltage which is similar to sine wave and the voltage will be provided to EL through C4,L1. When C5's voltage reaches EL's discharging voltage, EL will be illuminated.