基于纹波补偿和消除直流偏置的恒定导通时间控制开关变换器

来源 :中国电工技术学会电力电子学会第十四届学术年会 | 被引量 : 0次 | 上传用户：chunyu1988

【摘要】

：

针对恒定导通时间(COT)控制的Buck变换器存在直流偏置问题和当输出滤波电容的等效串联电阻(ESR)较小时出现次谐波震荡问题,本文提出了一种基于纹波补偿和消除直流偏置的恒定导通时间控制技术.通过引入输出滤波电容的等效串联电阻的纹波电压补偿,使反馈电压的纹波增强,从而提高了系统的稳定性;此外,通过引入直流偏置消除电路,使得变换器的输出电压的直流偏置得以消除.理论分析和仿真结果验证了该控制技术的可行

【作者】

：

刘争光赵晋斌屈克庆李芬曹炜

【机构】

：

上海电力学院电气工程学院,上海 200090

【出处】

：

中国电工技术学会电力电子学会第十四届学术年会

【发表日期】

：

2014年6期

【关键词】

：

开关变换器恒定导通时间纹波补偿直流偏置

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基于纹波补偿和消除直流偏置的恒定导通时间控制开关变换器

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