中国电机工程学报2024，Vol.44Issue(8)：3235-3247,中插25,14.DOI:10.13334/j.0258-8013.pcsee.222873
高轻载效率少功率器件的可模块化扩展ZVS高增益变换器
Modularly Expandable ZVS High-gain Converter With High Light-load Efficiency and Reduced Power Components
摘要
Abstract
In this paper,a modularly expandable zero voltage switching(ZVS)high-gain boost converter with high light-load efficiency and reduced power components is proposed.The proposed converter can enhance voltage gain by increasing the number of step-up modules(n).It consists of 2 switches and(n + 1)diodes,which suffer from low voltage stress of[(n + 1)Uin + Uo]/(n + 2).In addition,the input inductor is operated in continuous conduction mode;other inductors are operated in continuous bidirectional conduction mode and the sum of their reverse peak current must be higher than the valley value of the input inductor current.Benefiting from this design method,all power semiconductors realize soft-switching.Besides,a flexible-switching-frequency control method is employed,which involves adjusting the switching frequency through a lookup table based on input voltage and load conditions.This approach limits the peak current of inductors to within a specified range.Consequently,the soft-switching condition is fulfilled,and the current stress and conduction loss are minimized,leading to an improved light-load efficiency.In this paper,the working principle,steady-state characteristics,soft-switching conditions,and control methods of the proposed converter are analyzed in detail,and the correctness of the theoretical analysis is verified with a 250 W experimental prototype.关键词
Boost变换器/高增益/低电压应力/零电压开关/柔性开关频率Key words
Boost converter/high voltage gain/low voltage stress/zero voltage switching(ZVS)/flexible-switching-frequency分类
信息技术与安全科学引用本文复制引用
许兴,秦岭,茅靖峰,杨毓,段冰莹,周磊..高轻载效率少功率器件的可模块化扩展ZVS高增益变换器[J].中国电机工程学报,2024,44(8):3235-3247,中插25,14.基金项目
江苏省高校自然科学基金项目(20KJA470002) （20KJA470002）
南通市社会民生科技计划面上项目(MS12021015) （MS12021015）
江苏省大学生创新创业训练计划一般项目(202210304113Y). Natural Science Research Program of Jiangsu Colleges and Universities(20KJA470002) （202210304113Y）
Social Livelihood Science and Technology Planning General Project of Nantong City(MS12021015) （MS12021015）
General Project of Jiangsu Province College Student Innovation and Entrepreneurship Training Program(202210304113Y). （202210304113Y）
