The data shows that the electronic ballast is essentially a power converter that converts low frequency AC voltage into high frequency AC voltage. According to its installation mode, it is divided into three types: independent type, built-in type and integral type. According to its starting mode, it can be divided into preheating start type, fast start type and immediate start type. The basic principle is that the 50Hz/60Hz AC voltage passes through a radio frequency interference (RFI) filter, a full-wave rectifier and a passive (or active) power factor effector, and becomes a DC voltage through a DC/AC converter. The output voltage of 20kHz-70kHz is applied to the LC series resonant circuit connected to the lamp tube. The high-frequency resonant inductor L is connected in series with the filament. The resonant capacitor is connected in parallel with the lamp tube to generate a high resonant current, heat the filament and simultaneously on the capacitor. It also generates a resonant high voltage, which is applied to both ends of the lamp tube, forcing the lamp to "discharge" and become "on", and then enter the illuminating working state. At this time, the high frequency inductor plays a role of limiting the current increase to ensure The lamp receives the normal lamp and lamp current required.
The reporter learned through the technical staff of Sanxiong Aurora that the T5 series electronic ballasts of Sanxiong·Aurora strive to be stable, efficient and energy-saving in circuit design. The power input part has perfect over-current, over-voltage protection and EMI (anti-electromagnetic interference) circuit; the power factor correction circuit adopts the latest variant flow-by-flow circuit, which makes the electronic ballast have higher power factor and more stable operation; The type of half-bridge self-oscillating circuit has the advantages of wide operating voltage range and good stability, and has good adaptability to the long-term high and low voltage of the grid, and caters to the current situation of large fluctuations in China's power grid.
The China Electricity Council announced the forecast of the national power situation in 2005. It believes that the power shortage will ease this year, but the supply and demand situation remains tense. Saving power resources and developing energy-efficient environmentally friendly lighting products have become the core tasks of social responsibility and technological upgrading of lighting companies such as Sanxiong and Aurora.
Experts said that the life cycle of the domestic lighting industry is in the stage of rapid growth, and enterprises that cannot keep up with the trend of the times will be eliminated. The limited resources will be concentrated in a few advantageous enterprises. On the road, lighting companies have become more and more brand-oriented, re-promotion, image, and philosophy, and have begun to shift from product competition to brand competition.
(Edit: sally manuscript provided by Landi International Public Relations Consultants Ltd.)
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