DC Energy Saving Lamps
Author: Source: Datetime: 2016-09-29 17:16:38
Usually used in the three-color energy-saving lamps need AC (frequency greater than 20KHz) light, so must use DC/AC inverter circuit to DC can be converted to AC power to use.
DC lighting by circuit can be divided into self-excited type and it excited two types of LED lighting is generally DC/DC circuit type; Energy-saving lamps require inverter circuit with high conversion efficiency, good job stability, simple circuit structure and other characteristics. DC lighting by structure type is divided into semi-industrial lamps (lamp pluggable) or lamps (lamp non-removable).
DC-powered electronic ballasts
DC ballast for self - ballasted fluorescent lamps. Most of the products are used in power switching devices and pulse transformer or composite components of a square wave DC/AC inverter; its operating frequency is generally more than 20KHz. The self-ballasted fluorescent lamps in the DC-powered self-ballasted fluorescent lamp require high reliability and low self-loss.On the market many solar power generator support this DC energy-saving lamps.
In the DC-powered self-ballasted fluorescent lamp to be added in the soft-start device, if the filament without preheating and instantaneous start, it will lead to a large number of filament material sputtering, so that light-emitting material at both ends of the early black failure, shorten the lamp Service life. Therefore, DC-powered self-ballasted fluorescent lamps, soft-start device is essential. DC-powered self-ballasted fluorescent lamp soft-start device used in electronic devices and electronic circuits in different forms, their performance advantages and disadvantages, but its purpose is to achieve the preheat filament effect, and then high-voltage start, light tube.UFO Energy is the large portable solar power generator manufactuer which suppliy solar generator support this DC energy-saving lamps.
Double-tube self-excited inverter circuit works: inverter circuit using dual-tube self-excited inverter circuit, the output high-frequency, high voltage, quasi-sinusoidal AC. The circuit waveform is smoother, close to the sine wave, the circuit self-loss is small, the efficiency is higher than 80%. When the output is open, short circuit or reverse power supply when the circuit has a protection function. Fluorescent tubes connected to the output side, the parallel capacitor is a fluorescent tube built-in components, provided by the lamp manufacturer as a whole. Pregnant is the output transformer, positive feedback transformer.
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