Double-line pilot frequency power supply of gas discharge lamp

Abstract

The invention relates to a double-line pilot frequency power supply of a gas discharge lamp, which supplies power for a lamp tube by the parallel of power frequency large current power supply and high frequency low current power supply which are composed of a power factor compensation capacitor C1, a rectifying inducer E, a filter capacitor C2 and a high-frequency electric source generation circuit F; because the rectifying inducer E does not need to supply starting excitation high voltage to the tube, a pure inductance rectifier can be selected, when the tube normally lights, the work pressure is close to mains voltage, thereby improving the use ratio of the electric energy. When the tube is started and normally lights, the power of the high-frequency electric source generation circuit F is smaller than 50W, the frequency is designed into 2.5MHz-3MHz, thereby being more benefit to excite free electrons in the tube and having good effect on improving the lighting effect and protecting the guard electrode. The output power of the whole circuit is controlled by inducers L1 and L2. The symmetrical design aims to reduce the electromagnetic interference.

Description

technical field [0001] The invention relates to an electronic rectifier power supply for a gas discharge lamp. Background technique [0002] Gas discharge lamps include high-pressure sodium lamps, high-pressure mercury lamps, metal halide lamps, xenon lamps, fluorescent lamps, etc. At present, the rectifiers that match these lamps on the market can be divided into two types, one is an inductive rectifier, and the other is an electronic rectifier. . They all use a single power supply to power the gas discharge lamp, and there are insurmountable defects in the actual use process. [0003] The power factor of the inductance rectifier is not high, and its own consumption accounts for 4% to 10% of the total energy consumption. To improve the power factor of the inductance rectifier, although the capacitance compensation method can be adopted to overcome it, the nearby compensation will affect the life of the lamp, so the individual current is large, the input wire must be thick...

AI Technical Summary

Problems solved by technology

[0005] Therefore, whether the rectifiers used in the existing gas discharge lamps are inductive rectifiers or electronic rectifiers, they all have their own inherent defects and difficult technical problems.

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