摘要
由于开关器件的存在,DC/DC变换器作为一种强耦合、强非线性的装置,可将静态非线性特性和动态线性特性分开考虑。提出了一种采用Hammerstein模型建立DC/DC变换器数学模型的方法。该方法从输入、输出信号的相关函数出发,采用m3序列作为输入信号,从而建立变换器的Hammerstein数学模型。最后,以CUK变换器为例,在Matlab/Simulink中通过仿真验证了提出的方法是有效的。
The converter is widely used in the power field, and with its nonlinearity, this device is difficult to analyze and design. This paper proposes a model of the converter using black-box methods. For a DC/DC converter, the static nonlinear characteristics and dynamic linear characteristics can be considered separately, so a Hammerstein model can be used to identify the static nonlinearity from input-output measured at the steady state. A linear model is used to identify the dynamic linear part from input-output data ralative to a transient generated by m3 sequence constructed with three input values used to identify the nonlinearity. The converter model can be established based on the Hammerstein model. A CUK DC/DC converter is taken as an example. At the end, the simulation in Matlab/Simulink shows the effectiveness of the model.
出处
《科技导报》
CAS
CSCD
北大核心
2009年第7期70-73,共4页
Science & Technology Review
