考虑非理想因素的Weinberg拓扑建模  

Modeling of Weinberg Topology Considering Non-ideal Factor

作　　者：许奕辰 胡海兵[1] XU Yi-chen;HU Hai-bing(Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[1]南京航空航天大学自动化学院

出　　处：《电力电子技术》2019年第11期40-41,60,共3页Power Electronics

摘　　要：非隔离型Weinberg拓扑因具有输入、输出侧电流连续、效率高、易于控制等优点在航天领域得到了广泛应用。常规的小信号建模方法忽略了耦合电感漏感带来的续流模态,模型精确度较低,不利于拓扑控制稳定性分析。采用开关元件平均法对考虑耦合电感漏感和输出电容等效串联电阻(ESR)的Weinberg变换器进行建模,得到修正小信号模型。对比修正模型、仿真扫频和实验扫频结果,修正模型与仿真扫频基本重合,与实验扫频基本吻合,低频段幅值和相位最大误差分别不超过2dB和8°。The non-isolated Weinberg topology has been widely used in the area of space due to the advantages of continuous input and output current,high efficiency and easy control.The freewheeling modes caused by leakage inductance of coupling inductor are ignored by conventional small signal modeling method,and the model accuracy is low,which is not conducive to the analysis of control stability.Using the switching element averaging method to model the Weinberg converter considering leakage inductance of coupling inductor and equivalent series resistance(ESR) of output capacitor.The modified model and simulated results are basically the same,which is consistent with experimental results;the maximum amplitude and phase error at low frequency band do not exceed 2 dB and 8°respectively.

关 键 词：变换器 耦合电感 漏感 开关元件平均法 

分 类 号：TM46[电气工程—电器]