目 录
引言 ............................................................... 1 1.传统的高压电源升压方式 ........................................... 2 1.1 变压器升压原理 ............................................. 2 2．系统整体设计 .................................................... 4 2.1高压电源的整体设计 .......................................... 5 3．各模块单元设计 .................................................. 5 3.1.功率场效应管的驱动控制 ...................................... 5 3.2功率MOSFET的工作原理 ....................................... 6 3.3单片机的选择 ................................................ 6 3.4单片机时钟电路设计 .......................................... 8 3.5单片机复位电路设计 .......................................... 9 3.6键盘输入模块设计 ........................................... 10 3.7显示模块设计 ............................................... 10 3.8功率整流二极管 ............................................. 11 3.9 过载采样 ................................................... 12 3.10报警指示 .................................................. 13 3.11 A/D 转换 .................................................. 13
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3.12 高压发生电路设计 ......................................... 13 3.13 串行接口通信 .............................................. 14 4.数字化小功率高压电源的电路原理图及软硬件设计 .................... 15 4.1数字化小功率高压电源整体电路图及各部分接线图 ................ 15 4.2 高压逆变硬件设计 ........................................... 16 4.3单片机软件设计 ............................................. 18 5主回路仿真实验 .................................................. 18 5.1仿真软件介绍 ............................................... 18 5.2 数字化小功率高压电源系统仿真 ............................... 19 6总结 ............................................................ 21 7.致谢 ............................................................ 21 参考文献 .......................................................... 21 附录 .............................................................. 22
数字化小功率高压电源设计
摘要:高压直流电源在科学和工业生产中有着普遍的应用，光学仪器，医疗设备，质谱分析，静电喷涂，激光器，x射线衍射仪和其他有些分析成像射线类仪器中很重要部件。传统的高压电源很多都采用线性技术，缺点是这种结构形式使电源变换损失功率增多，体积大，重量沉，操作和维修都不方便。由于电源技术的快速发展，人们对于高压电源的智能化和数字化程度、转换的效率和带负载能力提出了更高的要求。设计了一种以单片机技术为基础的智能化小型高压电源。该电源由单片AT89C51机控制，利用黑白电视机中的高压包和一些简单易购的元件来制作高压发生器实现升压输出直流，该电源源具有通用性强、输出可调范围宽、制性能优良等特点。
关键词： 高压电源；数字控制；单片机
Digital low-power high-voltage power supply design
ABSTRACT
High voltage DC power supply in the scientific and industrial production has a broad application, Optical instruments, medical equipment, mass spectrometry, electrostatic spraying, laser, X ray diffraction and some other analysis imaging ray instrument in an important and indispensable component. The traditional high voltage power supply with linear technique, the structure causing the power transform efficiency is low, large volume, heavy weight, inconvenient repair operation. With the power of technology development, people on the high-voltage power supply intelligent degree, conversion efficiency and load ability raised taller requirement. Design of a microcontroller based intelligent miniature high voltage power supply. The power supply is composed of STC89C51 single chip microcomputer control, Use of FBT and some simple components to make available high voltage generator to achieve step-up DC output.The high voltage power supply with high universality, adjustable output range, high precision, good control performance characteristics.
Key word: High voltage power supply; digital control ;MCU
引言
小体积高压电源在高能离子能量分析器和小功率X光管供电等方面有重要的应用, 这些应用对高压电源提出特殊要求:
(1) 输出电压值高, 一般在+ 30～ + 50kV；
(2) 高压的稳定性好, 一般要求输出波动的范围是千分之几； (3) 输出高压范围比较宽, 而且能连续可调； (4) 体积小、输入功率较低, 适合野外操作等；
根据这四点要求, 文中使用全集成化的电路设计出稳定并且可靠的新型数字化高压电源, 该电源具有功率损耗低、体积小、重量轻、绝缘性能强等特点, 而且输出的高压能连续可调,稳定性好。现在的研
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