The electronic rectifier is used to start the fluorescent tube or energy-saving lamp. The principle is that the power frequency power supply is subjected to radio frequency interference (RFI) filter, full-wave rectification and passive (or active) power factor corrector (PPFC or APFC). After that, it becomes a DC power supply. Through the DC/AC converter, the high-frequency AC power supply of 20K-100KHZ is output, and is applied to the LC series resonant circuit connected to the lamp to heat the filament, and at the same time, a resonant high voltage is generated on the capacitor, which is applied to both ends of the lamp tube, but the lamp tube is made" The discharge "turns on" to the "on" state, and then enters the illuminating state. At this time, the high-frequency inductor acts to limit the current increase, ensuring that the lamp tube obtains the lamp voltage and lamp current required for normal operation.
The LED lamp itself is a low-voltage DC power supply, and does not need to use high voltage. You said that the inductor rectifier should be a transformer, and the voltage of 220v is stepped down to the voltage required by the LED itself through rectification and filtering. (The specific voltage depends on the application method of the LED)
Inductive ballast The output of the lamp is AC 50hz mains. It only has a starting effect on the lamp and a phase shift of the voltage to the current.
Electronic ballast The output of the lamp is high frequency AC output voltage is also different (also has a starting function)
As for why the high frequency is better, it is due to the problem of electrical efficiency and inductance.
And the LED light (assuming there is a power drive inside), it is necessary to look at the range of input voltage and frequency required by the power drive.
It is the output voltage and frequency of the inductor ballast and the electronic ballast mentioned above.
What is the magnetic ballast, it is a transformer, DC output;
No, fluorescent lamps are gas ignited, LEDs are electronic originals, the principle is different, not universal。
--Shenzhen Toplight lighting Co. Ltd.(led tube light/
LED linear light/led high bay light/led tri-proof light/Toplight/Toplight Lighting)
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