High power high voltage generator

Abstract

The invention relates to a high power high voltage generator which comprises a main circuit and a control portion. The main circuit adopts insulated gate bipolar translators (IGBTs) as an inversion module to form a full bridge inversion circuit. The output end of the full bridge inversion circuit is connected with a resonant circuit and a booster transformer to output high voltage. The control portion comprises a kilovolt (KV) double-ring adjusting circuit, a phase shift controller, a complex programmable logic device (CPLD) and an IGBT drive and protection circuit. The input end of the KV double-ring adjusting circuit receives KV feeding value and current feedback signals and voltage feedback signals of the main circuit, the output end of the KV double-ring adjusting circuit is connected with the CPLD through the phase shift controller, and output signals of the CPLD are transferred to grid electrodes of each IGBT in the main circuit through the IGBT drive and protection circuit. The high power high voltage generator improves inversion reliability, simultaneously reduces product cost, reduces the radiating mode, prolongs service life of the IGBT, can quickly build KV output and maintains high accuracy.

Description

Technical field [0001] The invention relates to a high-power high-voltage generator used in X-ray equipment, in particular to a high-power high-voltage generator using IGBT low switching loss inverter technology. Background technique [0002] At present, equipment that uses X-rays, such as industrial flaw detection equipment, security inspection equipment, CT machines and X-ray machines, needs to have a high-voltage generator with high power, small size and weight, low heat dissipation, high reliability, and low price. Features. [0003] With the continuous improvement of the performance of the application of X-ray equipment, such as the number of layers scanned by CT machines, the requirements for high-voltage generators are gradually increasing. The so-called high power should meet the requirements of the latest CT multi-slice scanning; the small size and weight should meet the requirements of convenient installation and operation on the CT rack; less heat dissipation, which sho...

AI Technical Summary

Problems solved by technology

The reason is that the operating frequency is low, which leads to the inherently slow open-loop response speed of the high voltage itself, and the closed-loop KV control response speed is even slower, making it difficult to realize the 1ms exposure function

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