Digital low power consumption high-precision high voltage generator

Abstract

This invention relates to a technique based on DSP technology of digital low-power, high-precision and high voltage generator, including a high voltage generate circuit 1, steady voltage driving circuit regulators 2, DSP control system 3, current / voltage circuit sampling tube 4, and driven circuit 5. The high voltage circuit provides negative voltage for X-ray tubes, and produces current in the X-ray tubes. Current / voltage sampling circuit 4 samples the voltage / current which is provided to X-ray tube by high voltage circuit 1, and the sampling signal will be transmitted to the DSP control system 3. DSP control system samples the signals using the built-in 10 D synchronous analog-to-digital converter, analysis and processing. Converter Implementation of a high voltage output circuits have a negative high voltage X-ray tube and the current stability testing. Then PWM control signal wave will be output based on the test results, and put it on regulators driving circuit 2 and flow-driven circuit 5, and a closed-loop control circuit will be got, achieving the stability control of X-ray tube voltage and current.

Description

technical field [0001] The invention relates to a high-voltage power generating device, especially a digital low-power high-precision high-voltage generating device for a low-energy X-ray tube. Background technique [0002] In recent years, low-energy X-ray tubes have been widely used in various fields due to their many advantages, especially they are often selected as artificial excitation sources for X-ray fluorescence analysis systems. When the influence of other links in the system is ignored, the analysis results are affected by factors such as non-human adjustment changes and stability of X-ray exposure. The X-ray tube needs a high-voltage generator to supply power. The stability of the voltage and current of the high-voltage generator directly determines the stability of the X-ray exposure, and indirectly affects the reliability and measurement accuracy of the final analysis results. That is to say, the high-voltage generator The performance of the device determines ...

AI Technical Summary

Problems solved by technology

[0003] At present, the high-voltage generators for medical X-ray tubes produced at home and abroad have large power, large volume, and high price, and are not suitable as power supplies for low-energy X-ray tubes that work continuously.

Existing low-energy high-voltage generators mostly use reverse transformers and voltage doubler rectifiers to generate high voltages. The circuits are relatively complex, and the voltage stabilization circuits are relatively simple, but it is difficult to meet the stability requirements of analytical instruments.

And many voltage stabilizing circuits mostly use analog devices, and rarely use software to realize their functions

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