基于数字化技术的可调幅值逆变器设计  

Design of Adjustable Amplitude Inverter Based on Digital Technology

作　　者：高群[1] 任元杰 潘美珍[1] 高旺 王子元 Gao Qun;Ren Yuan-jie;Pan Mei-zhen;Gao Wang;Wang Zi-yuan(Anhui Province Key Laboratory of Microsystem,the 43rd Research Institute of CETC,Anhui Hefei 230088;The 43rd Research Institute of CETC,Anhui Hefei 230088)

机构地区：[1]中国电子科技集团公司第四十三研究所微系统安徽省重点实验室,安徽合肥230088 [2]中国电子科技集团公司第四十三研究所,安徽合肥230088

出　　处：《电子质量》2022年第4期141-147,共7页Electronics Quality

摘　　要：该文基于ds PIC33EV型数字信号控制器技术,进行了频率400 Hz、输出电压在幅值15 V~115 V连续可调的逆变器设计。通过控制器生成SPWM波,经过驱动器驱动单相逆变全桥,再通过LC滤波得到正弦波输出;对输入模拟控制量进行采集,通过改变调制比来调节输出电压。该文利用较高的载波频率降低输出波形畸变率;设计了离线开关时间表,提高了硬件工作效率和调制准确性;采用滤波算法去除窄的驱动脉冲,提高了电路工作的可靠程度。仿真验证了SPWM算法是有效的。试验结果表明,所设计的逆变器能够满足要求。An adjustable digital inverter working at the frequency of 400 Hz is designed based on ds PIC33EV digital signal control er. SPWM wave is generated through the control er and used to drive the single phase inverting ful-bridge, and sine wave can be obtained by LC filter;the amplitude of output wave varies with the modulation ratio,which is control ed by the input analog voltage. High carrier wave frequency is used to reduce THD of output wave;an offline switch time table is designed to improve efficiency of hardware and accuracy of modulation;narrow driving pulses are removed by filtering algorithm, and reliability can be improved. It can be proved by simulations that the algorithm of SPWM works well. The tests show that the inverter designed satisfies the demands.

关 键 词：ds PIC33EV 数字逆变器 中频 

分 类 号：TM464[电气工程—电器]