软开关变流器的稳态分析(一)

Steady-State Analysis of Soft-Switching Converters

讨论软件开关变流器的稳态分析，由于分别由软件开关变流器的;Lr-Cr单元和大的L-C滤波器单元决定的快、慢固有频率的共存,通过启动瞬态仿真程序寻找软开关变流器的稳态解可能会造成繁琐的计算和收敛失败。由于采用了基于暂态分析的换相检测技术和基于补偿原理的换相分析技术,文章所提出的数值法显示了高可靠性和快速收敛性。对两个直流变换器、一台逆变器和一台功率因数补偿装置作的稳态分析,突出显示了仿真算法的良好性能。

Steady-state analysis of soft-switching converters is discussed in this paper. Finding the steady-state solution of soft- switching converters by means of start-transient simulation may involve onerous computations and convergence failure, because of the mix of fast and slow natural frequencies determined respectively by the presence of soft-switching Lr-Cr cells elements and bulky L-C filter elements. The numerical method proposed in this paper shows high reliability and fast convergence, thanks to the adoption on an interval analysis based technique for the detection of commutations and a compensation theorem based technique for the analysis of commutations. Some examples of steady-state analysis of two dc-dc converters, an inverter and a power factor corrector are presented to highlight the good performances of simulation algorithm.