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.
出处
《电源学报》
2012年第1期84-89,93,共7页
Journal of Power Supply
关键词
小信号模型
最小二乘
黑匣子
阶跃响应
参数估计
small signal modeling
least squares
black box
step response
parameter estimation
