Isolation converter, X-ray generating equipment and medical imaging system

Abstract

The invention provides an isolation converter. The isolation converter comprises a power conversion circuit, a first sampling circuit and a second sampling circuit, wherein the power conversion circuit comprises an isolation variable voltage circuit and a control circuit, input ends of the first sampling circuit and the second sampling circuit are both connected with the isolation variable voltage circuit, and output ends of the first sampling circuit and the second sampling circuit are both connected with the control circuit; and the first sampling circuit comprises a high-speed analog-to-digital converter, the second sampling circuit comprises a low-speed analog-to-digital converter, and the isolation variable voltage circuit is respectively connected to the control circuit through the high-speed analog-to-digital converter and the low-speed analog-to-digital converter. The invention also provides a medical imaging system and an X-ray generating device applying the isolation converter. The isolation converter provided by the invention can comprehensively consider hardware cost on the premise of ensuring control performance, and has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to an isolation converter, X-ray generating equipment and a medical imaging system. Background technique [0002] Isolation converters are used to achieve high-frequency isolation between input and output. They have the advantages of high safety and small size. They can adjust the gain of the converter through the transformation ratio of the transformer, so they are widely used in various power electronic devices. When controlling the isolation converter for high-frequency isolation, it is generally necessary to control the output voltage, and it is also hoped to control the current or voltage of the resonant cavity, so as to improve the control performance of the isolation converter and avoid the overcurrent problem of the inverter bridge during the dynamic process. Further, the double closed-loop control of voltage and current in the isolated converter is realized. Digita...

AI Technical Summary

Problems solved by technology

[0003] However, when the existing isolation converters use analog-to-digital converters for analog-to-digital conversion, they either have relatively large defects in performance. For example, when the resonant cavity current is sampled, there will be relatively serious waveform distortion and frequency aliasing, which will lead to The modulated wave signal is disturbed; or there is a huge load on the entire system in terms of cost, which leads to a very high cost of the entire system of the isolation converter

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