张伟 陈树军 周洪军


摘要:电源系统是由不同的构件组成,其中微型X射线管是重要的构件之一。在X射线技术发展过程中,应用X射线构建电源系统,可以使原有的工频发生变化,并在变化期间形成中频逆变电路。进入到上世纪90年代,X射线电源系统由中频进入到高频,高频电源系统的应用,不仅促进X射线设备的快速发展,还能减少输出滤波电容对电路的影响,进一步缩小电源系统的体积,使用体积小重量轻的电源系统,可以显著提升电源系统的工作效率。本文围绕微型X射线管灯丝电源的研制展开讨论,为X射线管发展提供参考依据。
Abstract: The power supply system is composed of different components, among which the micro X-ray tube is one of the important components. In the development of X-ray technology, the use of X-rays to build a power system can change the original power frequency and form an intermediate frequency inverter circuit during the change. In the 1990s, the X-ray power supply system went from intermediate frequency to high frequency. The application of high-frequency power supply system not only promoted the rapid development of X-ray equipment, but also reduced the influence of the output filter capacitor on the circuit, and further narrowed the power supply system. The small size and light weight of the power system can significantly improve the efficiency of the power system. This article focuses on the development of the micro X-ray tube filament power supply, to provide reference for the development of X-ray tubes.
關键词:微型X射线管灯丝;电源;分析
Key words: micro X-ray tube filament;power supply;analysis
中图分类号:TN14 文献标识码:A 文章编号:1006-4311(2020)22-0192-03
0 引言
X射线在各领域应用范围不断扩大,并且已经获得良好的应用价值,尤其是将X射线应用在灯管中,作为灯丝电源重要的组成部分,在220V交流电输入环境中,降低变压器的加热能力的同时,还能校正功率因数,使灯丝电源可以正常的运行。但是传统的灯丝存在体积大、输出电压不稳等缺点,针对传统灯丝电源存在的缺点,积极应用X射线改变传统的灯丝电源,使传统的灯丝电源形成微型X射线管灯丝电源,不仅使微型X射线灯管符合电流控制标准,还能充分利用高频电磁场耦合能量,有效提高灯丝电源的工作效率。
1 微型X射线管的工作原理
大中型功率X射线管电源在运行时,会产生较高的电源绝对输出值,将电源绝对输出值控制在合理的范围内,需要在靶材的阳极和阴极材料上,分别施加相同的正负高压,在高压的作用下,才能降低高压直流电源绝对输出值,一般降低至原有输出值的一半。……