摘要
介绍了单相电压型桥式逆变器的数学建模方法,并分析了模型中各参数的影响因素。空载情况下的逆变器可近似等效为一个二阶系统,通过实验测量其不同频率时的输出电压,得到了逆变器空载时的幅频特性,与已知二阶系统的幅频特性曲线进行拟合,最终得到了准确的逆变器模型参数值。实验结果证明了该测试方法的有效性和可行性。
Mathematical modeling method of the single-phase bridge voltage source inverter is presented,and factors affecting the parameters in the model are analysed.The inverter under no-load conditions can be equivalent to a twoorder system,so the inverter output voltages at different frequencies through the experiment are measured and its amplitude frequency characteristic is obtained by computing and fitted with the amplitude frequency characteristic curve of two order system with known parameters to acquire the accurate value of mode parameters.The experimental results verify the effectiveness and feasibility of the proposed scheme.
出处
《电力电子技术》
CSCD
北大核心
2015年第2期31-33,74,共4页
Power Electronics
基金
国家自然科学基金(51177067)
辽宁省教育厅科学研究一般项目(L2012109)~~
关键词
逆变器
建模
幅频特性
曲线拟合
inverter
modeling
amplitude-frequency characteristics
curve fitting