空调室外机EMI滤波器的共模电感优化设计方法

doi:10.19784/j.cnki.issn1672-0172.2026.02.015

摘要/Abstract

摘要： 针对空调室外机在5 MHz~20 MHz电磁频率频段产生的EMI（Electromagnetic Interference）问题,常规整改方法包括整机加装磁环或优化EMI滤波器,滤波器优化通常涉及更换Y电容或共模电感。对于高频共模干扰,更改Y电容或外接磁环效果不显著,共模电感整改效果有限。基于整机初始测试曲线（带EMI滤波器）,提出一种共模电感协同优化设计方法,根据样机的初始测试曲线,针对超标频点,计算出机型所需的电感量和电阻抗,再通过公式转化为对应磁导率,从而合理选择磁芯材料、优化共模电感磁芯尺寸、绕线匝数,快速优化电感。该方法可提升30%的EMI性能,缩短10%的调试周期,同时缩减电感体积20%,单机成本至少降低5元。

关键词: 空调室外机, EMI滤波器, 共模电感优化设计

Abstract: For the EMI (Electromagnetic Interference) problem generated by the outdoor unit of air conditioner in the electromagnetic frequency band of 5 MHz~20 MHz, the traditional methods include installing magnetic rings on the entire machine or optimizing EMI filters. The EMI Filter optimization usually involves replacing Y capacitors or common mode inductors. For high-frequency common mode interference, changing the Y capacitor or external magnetic ring does not have a significant effect, and the improvement effect of common mode inductance is limited. Proposes a new design method for common mode inductors based on the initial test curve of the entire machine (with EMI filter), Propose a co-optimization design method for common-mode inductors. For the non-compliant frequency points, the required inductance and impedance of the model is calculated and then converted to the corresponding magnetic permeability via the formula. On this basis, the magnetic core material is reasonably selected, the core size and winding turns of the common-mode inductor are optimized, so as to rapidly optimize the inductor. This method improves EMI performance by 30%, shortens the debugging cycle by 10%, reduces the inductor volume by 20% , and lower the unit cost by at least 5 yuan.

Key words: Air conditioning outdoor unit, EMI Filter, Optimized design of common-mode inductors

中图分类号:

葛秋月, 史文伯, 杜子雪, 单烁. 空调室外机EMI滤波器的共模电感优化设计方法[J]. 家电科技, 2026, 0(2): 96-100.

Ge Qiuyue, Shi Wenbo, Du Zixue, Shan Shuo. Optimization design method for common mode inductance for EMI filter in air conditioner outdoor unit[J]. Journal of Appliance Science & Technology, 2026, 0(2): 96-100.

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参考文献

[1] GB4343—1995家用和类似用途电动、电热器具, 电动工具以力及类似电器无线电骚扰测量方法和允许值[S].
[2] 远坂俊昭. 测量电子电路设计–滤波器篇 [M]. 北京: 科学出版社, 2006.
[3] GB/T7343—2017 无源EMC滤波器件抑制特性的测量方法[S].
[4] 黄兆军. 电源滤波器在空调器设计中的选型与应用[J]. 家电科技, 2013(4): 59-61.
[5] 康弘俊, 彭麟, 唐志. 基于非晶纳米晶磁芯的EMI滤波器应用技术研究[J]. 通信电源技术, 2018, 35(11): 42-44.
[6] 方立勇, 韩冰冰, 万涛. 变频空调电磁骚扰的整改思路及实例分析[J]. 家电科技, 2018(增刊1): 174-179.
[7] 梁群庄, 万今明, 胡梦蝶, 等. 家用空调共模扼流圈EMI特性参数分析[J]. 磁性材料及器件, 2019, 50(5): 49-52.
[8] 姚中, 虞维扬, 张湘虹, 等. 滤波电感在电源抗干扰中的应用[J]. 上海钢研, 1999(5): 47-49.
[9] 陈彬, 姜鹏飞, 万妮娜, 等. 同轴多层筒式空心线圈自感和互感解析计算方法[J]. 电工技术学报, 2024, 39(20): 6270-6281.
[10] 周瑞霖, 周章桥, 王韬, 等. 线圈参数对一体成型电感损耗性能的影响[J]. 金属功能材料, 2024, 31(3): 1-6.
[11] 王鹤龙, 史贵丙, 王丽, 等. 高饱和磁通密度铁基非晶纳米晶磁粉芯的研究进展[J]. 材料导报, 2025, 39(3): 148-156.
[12] 姚林杰, 王耀斌, 蒋伟, 等. 开关电源EMI滤波器磁芯的选择与设计[J]. 机电工程技术, 2023, 52(5): 253-257.
[13] 彭宇. 基于共模电感磁饱和的功率EMI滤波器测试与分析[D]. 绵阳: 西南科技大学.
[14] 赵自强, 李瑞洲. 高频开关电源主要磁性元件的设计[J]. 工业C, 2016(4): 127-129.
[15] 张锋, 刘榕青. 一种电感及电感的制作方法: CN202510285212.7[P].2026-01-07.
[16] 秦亮亮, 欧阳斌林, 辛苗, 等. 基于开关电路的磁环电感值的测量[J]. 电测与仪表, 2013(1): 1001-1390.
[17] 汪源浚. 磁环几何形状对电感的影响[J]. 教学与科技, 2016, 29(1): 30-34.
[18] 韩思扬, 彭思睿, 卢子焱. 基于耦合电感的超宽带小型化威尔金森功分器[J]. 电子科技大学学报, 2025, 54(1): 8-12.
[19] Drummond R, Cougo B, Tran H D, et al.Design optimization of integrated CM/DM inductors for power drive input filter[J]. Power Electronic Devices and Components, 2025: 100115.