摘要
作为开关电源的核心部分,DC-DC变换器在实际应用中可能带有电感性的阻抗负载,这将对系统的稳定性产生影响。基于稳定设计的考虑,考察变换器对阻抗负载中寄生电感分量的容忍度,得到对应电路稳定的电感分量阈值,并对电路负载的阻抗效应进行综合分析。建立包含负载电感分量在内的变换器高维模型,并构造电路的离散迭代映射,通过计算平衡点附近的特征根,来分析当寄生电感分量变化时系统状态的演化过程及对电路稳定性的影响。相关的电路精确仿真、理论分析和电路实验均证明,阻抗负载存在一个对应系统不稳定的电感分量区间,而电路参数将对该区间的范围存在一定的影响。
As the core of the switching power supply,DC-DC converter may have load of inductive impedance in practical applications,and it will influence the system＇s stability. Based on the considerations of stable design,this paper studied the tolerance of converters to parasitic inductance in the impedance load,accordingly obtained the corresponding inductance threshold of stability and analyzed impedance effect of circuit load synthetically. Higher dimensional model including inductance component of load was introduced. By constructing discrete iterative map and calculating eigenvalue near equilibrium point,the evolution of system＇s operation regime and the circuit stability can be analyzed with the parasitic inductance component changing. Accurate simulations,theoretical analysis and circuit implementation prove that there exists a value range of parasitic inductance corresponding to the instable operation of converter,on which circuit parameters will have certain influence.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第6期15-21,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(60402001
60672023)
安徽省优秀青年科技基金项目(08040106807)~~
