基于最小二乘参数估计的PWM开关变换器小信号建模  

A Small-signal Modeling Method of PWM Switching Power Converter Based on Least Squares Parameter Estimation

作　　者：杨杰[1] 师宇杰[1] 戈田一[1] 李文安[1] 

机构地区：[1]解放军信息工程学院,郑州450002

出　　处：《电源学报》2012年第1期84-89,93,共7页Journal of Power Supply

摘　　要：提出采用拟合阶跃响应曲线的方法建立开关变换器的小信号模型。该方法从系统辨识的角度出发,将开关变换器看做一个黑匣子,采用最小二乘参数估计的方法,根据PSPICE仿真输出的阶跃响应数据,最终得到开关变换器的小信号模型。用此方法对BUCK及BUCK-BOOST变换器进行建模,并将此方法与以往的方法比较,验证了此方法所建模型的可行性。A small signal modeling method using least squares parameter estimation algorithm to fit the step response curve was proposed from the perspective of system identification. The method regarded switch power converter as a black box, with the PSPICE simulation input and output data of switch power converter for modeling. The model of BUCK and BUCK-BOOST converter was built using the method and compared to the model for the conventional method. Simulation results verify the feasibility of the proposed method.

关 键 词：小信号模型 最小二乘 黑匣子 阶跃响应 参数估计 

分 类 号：TM46[电气工程—电器]