摘要
为有效抑制电力电子设备给电网带来的谐波污染并解决能源短缺问题,高效AC/DC PFC变换器受到了广泛关注。文中针对图腾柱PFC变换器转换效率和电流过零点尖峰问题,利用功率开关管替代传统拓扑结构中的二极管,并提出了一种基于CCM模式的改进平均电流控制策略。该控制策略通过引入互补PWM,改进高频桥臂控制方式,降低了二极管续流损耗,提高了变换器转换效率。文中阐述了图腾柱拓扑结构电路工作原理以及控制策略,并在MATLAB/Simulink平台建立相应仿真模型对所提方案进行了验证。在此基础上,文中还设计并搭建一台原理样机。实验结果表明新方法的转换效率提高了1.5%,且电流无明显过零尖峰,证明了所提改进型控制策略的有效性和可行性。
In order to effectively suppress the harmonic pollution caused by power electronic equipment to the power grid and solve the problem of energy shortage,high-efficiency AC/DC PFC converter has attracted extensive attention.In order to solve the problems of conversion efficiency and current zero-crossing distortion of totem pole PFC converter,the diode in traditional topology is replaced by power switching tube,and an improved average current control strategy based on CCM mode is proposed.The control strategy improves the control mode of high-frequency bridge arm,reduces diode freewheeling loss and improves the conversion efficiency of the converter by introducing complementary PWM.The working principle and control strategy of totem pole topology circuit are described in detail,and the proposed strategy is simulated based on MATLAB/Simulink platform.On this basis,a prototype is designed and built.The experimental results show that the conversion efficiency of the proposed method is improved by 1.5%,and the current has no obvious zero-crossing peak,which proves the effectiveness and feasibility of the proposed improved control strategy.
作者
夏远帅
谢明
杨洋
姚磊
XIA Yuanshuai;XIE Ming;YANG Yang;YAO Lei(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《电子科技》
2023年第5期23-27,40,共6页
Electronic Science and Technology
基金
国家自然科学基金(51707121)。
