电力电子电路机理仿真实验系统的初步研究

Primary study to the emulational experimental system of power electronic circuits mechanism

把建立电路方程的一般方法-表矩阵法,应用于带开关器件的电力电子电路,通过把电路中的开关元件视为理想开关,并将其作为一个电路元件包含在电路中,建立起统一的电路方程,采用向后欧拉法对其进行数值求解.电路的表矩阵方程的系数矩阵通常是稀疏矩阵,需要采用稀疏矩阵技术进行计算机仿真.最后用一个实例,单象限降压型电路(Buck电路)的仿真,说明了这种方法在实际应用中的可行性和有效性.

A general method to establish the equations of linear circuits, table matrix method, is applied in the power electric circuits with switching components. It establishes unified equations of such circuits by describing the switching components in the circuits as ideal switches in the circuits, then solved by the backward Euler method. Generally, the coefficient matrix of the table matrix in the circuits is a sparse matrix, the technology of sparse matrix should be used in the computer simulation. Finally, an example about the simulation of Buck circuit is given to show the feasibility and validity of this method in the practice.