门机变频器三电阻电流采样及合成方法  

Three-resistor current sampling and synthetic method based on door inverter

作　　者：王道武 厉虹 刘宏鑫 

机构地区：[1]北京信息信息科技大学自动化学院,北京100192 [2]北京索德电气有限公司,北京100176

出　　处：《北京信息科技大学学报（自然科学版）》2013年第1期18-21,共4页Journal of Beijing Information Science and Technology University

基　　金：国家自然科学基金资助项目(11072038)

摘　　要：针对某些低成本应用场合,提出一种逆变器下桥臂的三电阻电流采样以及重构方法。在DSP控制平台下采用SPWM信号调制方式分析负载电流与3个下桥臂电流之间的关系,提出一种间接目标电流的合成方法,实现了全区域电流采样及合成。利用matlab/simulink平台对重构方法进行仿真实验,验证了合成方法的正确性和可行性。Aiming at some low-cost applications, three-resistor current sampling at lower bridge arms of the inverter and its reconstruction method are presented. On the DSP control platform, the relationships between the load current and the three lower bridge arms current are analyzed under the SPWM signal modulation. An indirect target current synthetic method is given. The current sampling and an aU-region synthesis are realized. The reconstruction method is simulated on the SIMULINK platform of MATLAB. The correctness and feasibility are confirmed by the experiment results.

关 键 词：三电阻电流采样 SPWM技术 DSP 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]