The electrodeless fluorescent lamp system is based on the principle of electromagnetic induction, which couples the plasma to the magnetic lines of the circuit, and uses a pair of iron cores placed outside the lamp tube to form an induced current in the lamp tube, unlike the ordinary fluorescent lamp, using the electrode to externally The electrical energy is converted into the energy needed to work inside the lamp. A pair of cores placed outside the tube acts like a primary coil of a transformer, and a closed tube acts like a secondary coil of a transformer. The electronic ballast can be installed separately from the lamp tube according to the need, and the distance is 0-20 meters. After the power is turned on, the electronic ballast generates an alternating current with an operating frequency of >1.5 MHz or more, thereby generating an alternating magnetic field in the discharge region. According to Faraday's law of electromagnetic induction, a changing magnetic field generates an induced current in the tube, thereby causing a mixed vapor of low-pressure mercury and an inert gas to be discharged, radiating ultraviolet rays of 253.7 nm, and then converting the phosphor into visible light.
Since the electrodeless lamp has no electrodes, the lamp tube portion does not exist and the consumable components. The life of the whole system mainly depends on the electronic ballast, so the lamp has a very long life and can reach more than 60,000 hours. It is especially suitable for places where it is difficult to change lamps and expensive, as well as important places for safety requirements and high. Such as tunnels, complex traffic areas, subway stations, high ceilings, hazardous area lighting, halls, sports fields, etc.
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