High-power X-fluorescence high-voltage power supply

Abstract

The invention relates to a high-power X-fluorescence high-voltage power supply and belongs to the technical field of ray radiation facilities. The high-power X-fluorescence high-voltage power supply mainly comprises serial main power supply rectification module, main full bridge inversion module and transformer boosting rectification module which form an anode circuit, serial filament power supply rectification module and filament control and inversion module which form a cathode circuit, a main control module, and a power-up delay protection module which is used for opening an intermediate relay to supply power for the main full bridge inversion module after amplifying a main control module starting signal, counting and delaying a preset time length; the main control module is used for outputting corresponding PFM signals to control the output of the main full bridge inversion module according to the result of the comparison between the output voltage and control voltage so as to realize the closed-loop control for the output voltage of the transformer boosting rectification module. After using the high-power X-fluorescence high-voltage power supply, the starting impact can be avoided effectively, the output is stable, and the service life of the X-ray tube is greatly improved.

Description

technical field [0001] The invention relates to a special high-voltage power supply, in particular to a high-power X fluorescent high-voltage power supply, which belongs to the technical field of ray radiation facilities. Background technique [0002] According to the applicant's knowledge, before the 1980s, the X-ray fluorescence power supply was generally a 50Hz-60Hz industrial frequency power supply. This power supply is boosted through a one-stage or two-stage autotransformer, and then provides high voltage for the X-ray tube through full-wave rectification and filtering. Not only is the whole machine bulky and heavy, but it also has large ripples and low efficiency, and the greater the power, the more serious the heat. After the 1980s, an X-ray fluorescent power supply using switching power supply technology appeared. The operating frequency of this power supply can reach 20KHz, and pulse width modulation technology (PWM) is usually used. The size of this type of powe...

AI Technical Summary

Problems solved by technology

Although this invention can reduce costs and improve compatibility to a certain extent, the technical solution is mainly applied to micro-focus X-ray tubes. Although the maximum voltage can reach 90kv, the maximum tube current is only 0.4mA, and the continuous working time is short, which cannot meet the long-term requirements. The need for time high power X-ray tubes

Images