摘要
为了使SHEPWM技术能得到更好的应用,本文对特定消谐技术的基本问题进行了深入分析与研究,针对双极性电压型逆变器和单极性电压型逆变器分别建立了2种不同的SHEPWM的数学模型,并在此基础上研究了特定消谐非线性方程组的计算方法及初值的选取,从而总结出在取适当初值的情况下采用同伦牛顿算法可以使特定消谐方程组在大范围内快速收敛于精确解,最后通过仿真验证其正确性。
For better and broader application of SHEPWM technology,the fundamental problems of SHEPWM is analyzed and studied in this paper.Two kinds of different SHEPWM mathematical model respectively aimed at unipolar voltage source inverter and bipolar source inverter are founded.And based on that,the computational method and choice of initial value of selective harmonic eliminated nonlinear equations are researched.The conclusion is that adopting Newton-Homotopy arithmetic with appropriate initial value can make selective harmonic eliminated nonlinear equations achieve accurate solution rapidly in large-scale.Finally the validity of the computational result is verified through simulation.
出处
《舰船科学技术》
2010年第8期203-206,共4页
Ship Science and Technology
关键词
特定消谐
非线性方程组
电压型逆变器
elective harmonic eliminated
nonlinear equations
voltage source inverter