广西师范大学学报（自然科学版）2016，Vol.34Issue(2)：15-20,6.DOI:10.16088/j.issn.1001-6600.2016.02.003
耦合电感升压变换器开关管应力降低的研究
Research of Reducing the Stress on the Switch in the Coupled Inductor Boost Circuit
摘要
Abstract
In order to solve the problem that the voltage gain is limited by the limit of the voltage gain because of the parasitic parameters in traditional boost converter and a series of problems caused by the presence of the leakage inductance in the traditional boost converter with coupled inductance,a new high gain coupled inductor boost converter for photovoltaic power generation system is proposed.Based on the traditional coupled inductor boost converter,the converter is added to the lossless absorption circuit composed of diode,inductor and capacitor.As the coupled inductor has the transformer effect,the new circuit has higher voltage gain,compared with the traditional boost converter with coupled inductance;Since inductance has the effect of inhibiting the rise of current,it can reduce the current stress of the switch tube when the switch tube is on;The lossless snubber circuit could absorb leakage inductance energy to suppress the voltage spike at bothends of the switch.When the switch is turned completely, the energy in the capacitor and inductance can be delivered to the load,which realizes the lossless transmission to further enhance the voltage gain.In order to verify the validity of the new coupled inductor boost converter,the simulation model of the new coupled inductor boost converter and the traditional coupled inductor boost converter are built on the MATLAB/Simulink platform.By comparing the corresponding simulation waveforms of the two models,it can be seen that the new converter has higher voltage gain and relatively smaller voltage and current stress on the switch tube than the traditional one.关键词
耦合电感/光伏发电/无损吸收电路/电压电流应力Key words
coupled inductor/photovoltaic power generation/lossless snubber circuit/stress of the voltage and current分类
动力与电气工程引用本文复制引用
石林林,祝龙记,朱红..耦合电感升压变换器开关管应力降低的研究[J].广西师范大学学报（自然科学版）,2016,34(2):15-20,6.基金项目
国家自然科学基金资助项目(11105002) （11105002）
