基于PIC18F248的SPWM波生成的一种方法  

A Method of Producing SPWM Waveform Based on PIC18F248

作　　者：代玉伟[1] 李敬东[1] 唐跃进[1] 石晶[1] 

机构地区：[1]华中科技大学超导电力科学技术研究与发展中心,湖北武汉430074

出　　处：《通信电源技术》2007年第2期22-25,共4页Telecom Power Technology

摘　　要：随着超导技术和电力电子技术的发展,三相电流源型变流器(CSC)在超导储能领域依然占有主导地位。文中详细地介绍了电流型变流器(CSC)的正弦脉宽调制方法。该方法利用MCU PIC18F248产生SPWM波,采用查表和在线计算相结合,既能满足一定控制精度,又能满足实时控制要求,同时给出了整个程序流程图。实验结果验证了该方法的正确性和可行性。With the development of the technology of superconducting and power electronics, three-phase current source converter remains its dominant status in superconducting magnetic energy storage field. This paper gives an introduce in detail on a method of sinusoid pulse width modulation for CSC. The method produces SPWM waveform based on MCU PIC18F248. It can provide a certain control accuracy and meet real-time control demand by applying table-consulting and on-line calculation, and gives the flow chart for whole programme. The experimental results verify its validity and feasibility.

关 键 词：变流器 SPWM波 三值逻辑 

分 类 号：TM917[电气工程—电力电子与电力传动]