Microwave sulfur light power-supply system and controlling method

Abstract

A digital signal processor is used to control the excitation of a magnetron to generate microwave; with a soft starting up approach, the variation of instant power of microwave sulfur lamp is reduced; and a function for speeding the lamp-lighting process is added to fully excite the sulfur lamp in shorter time.

Description

technical field [0001] The invention relates to a microwave sulfur lamp power supply system and a control method, in particular to a power supply system and a control method capable of controlling and exciting a magnetron to generate microwaves. Background technique [0002] In 1993, the U.S. Department of Energy building and the Aerospace Museum successfully completed the lighting renovation project using the first generation of microwave sulfur lamps developed by Fusion. Instead of the light guide tube, the energy saving is 50%, and its illuminance level is 4 times that of the old lighting system. Therefore, the microwave sulfur lamp immediately attracted close attention in the field of lighting in the world. [0003] Microwave sulfur lamps do not contain toxic halogens and mercury, and the pollution of ultraviolet and infrared rays is extremely small. The light bulb production process and scrapping treatment are non-polluting to the environment, and the service life can ...

AI Technical Summary

Problems solved by technology

When the microwave sulfur lamp is started, the cathode filament in the magnetron will be preheated first, and then the high-voltage power supply will be used to light the lamp. Usually, the filament will lose its function after the lamp is successfully lit. If the power supply to the filament is not cut off or reduced , which will invisibly generate power consumption, and at the same time, the temperature of the magnetron will be too high so that its life will be relatively shortened

At the same time, when the microwave sulfur lamp is started, its instantaneous power changes too much. If it is started frequently, the life of the corresponding magnetron will also be reduced.

In addition, microwave sulfur lamps need to consume a considerable amount of starting power to complete the start-up, but usually the start-up system of microwave sulfur lamps lacks the protection function of start-up failure, so often after the start-up failure, the power supply side will still supply high-voltage and high-power power to the magnetron, which invisibly produces power consumption, which in turn causes the power system to overheat

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