考虑寄生参数和电感电流纹波的CCM模式Boost变换器建模

Modeling of CCM mode Boost converter considering parasitic parameters and inductor current ripple

在考虑电子器件寄生参数及电感电流纹波的情况下,运用三端开关器件模型法和能量守恒法对Boost变换器工作于CCM模式下的精确建模进行研究,推导了大信号等效电路模型、稳态等效电路模型和小信号等效电路模型,并在一个实际的Boost变换器上对存在寄生参数和电感电流纹波的情况进行仿真和稳态性能、动态特性分析。结果表明,此研究能够改善实际Boost变换器设计和系统性能。

Three-terminal switching device model and energy conservation method are used to study the precise modeling of Boost converter under the continuous conduction mode（CCM） by considering the parasitic effects of electronic devices and inductor current ripple case, then the equivalent circuit of large signal, stead- y-state equivalent circuit and small signal equivalent circuit model are deduced. At last, the real effects para- sitic parameters and inductor current ripple have on a practical Boost converter is simulated and the steady- state performance and dynamic characterics are analyzed. It is shown that this research has a good reference value for the design of Boost converter and the improvement of system performance.