单相有源PFC电器中EMI电路共模电感发热研究  

Common mode inductance thermal analysis in EMI circuit for active power factor correction based single-phase electrical system

作　　者：黄招彬 龙谭 徐锦清 胡斌 刘文龙 HUANG Zhaobin;LONG Tan;XU Jinqing;HU Bin;LIU Wenlong(Guangdong Midea Refrigeration Equipment Co.,Ltd.Foshan 528311)

机构地区：[1]广东美的制冷设备有限公司,广东佛山528311

出　　处：《家电科技》2024年第6期106-110,共5页Journal of Appliance Science & Technology

基　　金：2020年广东省重点研发计划(项目编号:2021B0101310001)。

摘　　要：在单相交流供电的家用电器系统中,通常使用由X电容和共模电感组成的EMI滤波器来抑制电磁干扰,并采用Boost型功率因数校正电路(PFC)来提高功率因数和降低电流谐波。然而,在特定情况下,共模电感可能会因电流谐振而导致温升过高,甚至过热烧毁。通过建立EMI滤波器和Boost型PFC电路的高频纹波电流等效电路模型,揭示了共模电感的差模成分在PFC开关纹波电流激发下引起电流谐振的机理,分析了共模电感漏感成分和X电容对电流谐振的关键影响,并提出了降低谐振频率和减小谐振峰值电流的策略。以变频空调系统为案例进行分析和实验,结果验证了模型分析的准确性,并提出了PFC载波频率设计与共模电感优化方案,解决了共模电感谐振的可靠性问题。In single-phase AC-powered household appliance systems,EMI filters composed of X capacitors and common-mode inductors are typically used to suppress electromagnetic interference,and Boost-type Power Factor Correction(PFC)circuits are employed to improve power factor and reduce current harmonics.However,under certain conditions,the common-mode inductor may experience excessive temperature rise or even overheat and burn out due to current resonance.A high-frequency ripple current equivalent circuit model is established for the EMI filter and Boosttype PFC circuit,revealing the mechanism by which the differential mode component of the common-mode inductor induces current resonance under the excitation of PFC switching ripple current.It analyzes the critical impact of the common-mode inductor's leakage inductance and the X capacitor on current resonance and proposes strategies to reduce the resonance frequency and peak resonance current.Using an inverter air conditioning system as a case study,PSIM simulations and experiments were conducted,which validate the accuracy of the model analysis.A PFC carrier frequency design and common-mode inductor optimization scheme is proposed,thoroughly resolving the reliability issue of common-mode inductor resonance.

关 键 词：功率因数校正 EMI 共模电感 谐振 

分 类 号：TM925[电气工程—电力电子与电力传动] TM133