DCM升压型PFC变换器的电流重整形补偿策略  

Current reconstruction strategy for DCM boost PFC converter

作　　者：张明[1] 罗雷明 张凯 姜东升[1] 张凡武[3] 雷鹏[3] 闵闰[2] ZHANG Ming;LUO Leiming;ZHANG Kai;JIANG Dongsheng;ZHANG Fanwu;LEI Peng;MIN Run(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China;Technical Center of Dong Motor Corporation,Wuhan 430056,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]华中科技大学光学与电子信息学院,湖北武汉430074 [3]东风汽车公司技术中心,湖北武汉430056

出　　处：《电机与控制学报》2024年第6期181-188,共8页Electric Machines and Control

摘　　要：针对不连续导通模式(DCM)下的升压型功率因数矫正(PFC)变换器,对其中的寄生参数致电流失真(PCD)效应进行研究。考虑元器件寄生参数,求解输入电压、输出电压和占空比的全微分方程,得到精确的阻尼型电感电流解析表达式。研究发现,PCD效应会导致很大的电流失真,从而显著降低系统功率因数。为了减小PCD效应,通过在不同条件下推导得到的补偿增益,能将输入电流重整为正弦波。对基于无电流传感的平均电流模式(SACM)控制,提出一种能降低PCD效应的电流重整形补偿策略。该策略对阻尼型电感电流方程进行增益补偿,进而降低电流阻尼导致的PCD效应。最后仿真和实验证明,增益补偿几乎不随负载电阻变化,变换器中的PCD效应和电流重整形策略有效。For parasitics-induced current distortion(PCD)effect in discontinuous conduction mode boost power factor correction(PFC)converter,with consideration of parasitics,an accurate damped inductor current equation was derived through the functions of input voltage,output voltage and duty cycle.PCD effect was found to have considerable influence to current distortion,which degraded PF under SACM control.In order to reduce the PCD effect,a compensation gain was derived to reshape the input current.The gain was calculated at different conditions.A current reconstruction strategy was proposed for sensorless average current mode(SACM)control.Based on the damped current equations,a compensation gain was derived to reconstruct the input current,which reduces the current damping and distortion caused by parasitics.It is proved to have little change along load resistance.Both the PCD phenomenon and the current reconstruction strategy are verified by simulations and experiments.

关 键 词：变换器 电流失真 寄生参数效应 电流重整 增益补偿 功率因数 

分 类 号：TM46[电气工程—电器]