Digital intelligent electric ballast of high power ultraviolet lamp tube

Abstract

A high power ultraviolet lamp digital intelligent electronic ballast comprises an anti-interference filter circuit, a rectifying circuit, a second rectifying circuit, an active power factor correcting circuit, a half-bridge inversion drive control circuit, a ballast circuit, a protective circuit and a microprocessor control circuit. Besides protecting abnormal operating states of the ballast by the protective circuit, the microprocessor control circuit is connected with the active power factor correcting circuit and the ballast circuit through a +400V sampling circuit and a lamp current sampling circuit to input digital PWM control signals to the half-bridge inversion drive control circuit, and has a 485 communication interface connected with an upper computer. The electronic ballast matched with ultraviolet lamps of more than 240W is used in the ultraviolet sterilization field of environmental protection, has good performance of electromagnetic interference and radiofrequency interference restrain, working stability and reliability control, soft starting, addressable, adjustable light, intelligent protection and network function, etc.

Description

technical field [0001] The utility model relates to an electronic ballast, in particular to a high-power electronic ballast for an ultraviolet lamp tube. Background technique [0002] Electronic ballasts above 240W are mainly used in the field of ultraviolet sterilization in environmental protection. They are used together with ultraviolet lamps above 240W. Ultraviolet lamps above 240W are mainly produced by American Light Sources Company, American First Light Company, and German Heraeus Company. The existing ballast technology adopts power factor correction circuit, half-bridge drive control circuit, ballast circuit and protection circuit, and adopts analog electronic technology. For electronic ballasts above 240W, there are ready-made products at home and abroad, but these It is difficult for the product to meet the higher technical requirements of electronic ballasts equipped with ultraviolet lamps above 240W, especially the suppression of electromagnetic interference and...

AI Technical Summary

Problems solved by technology

The existing ballast technology adopts power factor correction circuit, half-bridge drive control circuit, ballast circuit and protection circuit, and adopts analog electronic technology. For electronic ballasts above 240W, there are ready-made products at home and abroad, but these It is difficult for the product to meet the higher technical requirements of electronic ballasts equipped with ultraviolet lamps above 240W, especially the suppression of electromagnetic interference and radio frequency interference, work stability, reliability control, soft start, addressable, adjustable light, intelligent protection and network functions, etc.

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