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本文以一个150KHz的功率场效应管开关电源为例,应用状态空间平均法进行数学分析.阐述了高频开关电源动态设计的一般方法及步骤.首先应用状态空间平均法,推导出功率级的小信号平均模型.继而导出整个系统的传递函数.最后应用电子计算机辅助方法,分析系统的动态特性及选择线路参数,并从中得到了若干结论.
In this paper, a 150KHz power FET switching power supply is taken as an example, and the method of state space averaging is used for mathematical analysis.The general methods and steps of dynamic design of high frequency switching power supply are described.Firstly, by using state-space averaging method, Signal averaging model, and then derive the transfer function of the whole system.Finally, we use computer-aided method to analyze the dynamic characteristics of the system and select the line parameters, and get some conclusions.