家电科技Issue(z1)：328-332,5.DOI:10.19784/j.cnki.issn1672-0172.2024.99.067
冰箱浪涌测试损坏变频板机理和解决方案
Analysis on damage mechanism of inverter circuit in surge test of refrigerator and solution are put forward
任国兵 1阮兆忠 1张宝玉 1刘玉辉 1米春龙1
作者信息
- 1. 合肥华凌股份有限公司 安徽 合肥 230601||美的集团股份有限公司 广东顺德 528311
- 折叠
摘要
Abstract
Surge is the main item in the electromagnetic compatibility test of refrigerator,and it is easy to fail the test,one of the important reasons is that the insulation of the compressor motor is insufficient and the inverter circuit board is damaged.If the compressor motor insulation is broken down,there will be a large surge current through the inverter circuit components and the components will be damaged.In this paper,it is analyzed that the surge test level is 4 kV,and the resonant amplification of the common mode inductance and Y capacitance of EMI filter circuit and the distributed capacitance of compressor let the voltage between the winding and the casing of the compressor reaches above 5.5 kV.The electrical gap between the winding of the motor in the compressor and the seat spring(connected with the iron core and the casing)is small,and the gap is easy to break down.After the breakdown,a large surge current will break the IGBT of the inverter circuit,burn the inverter board,and the surge test of the refrigerator cannot pass.关键词
电磁兼容/电磁抗干扰/浪涌/分布电容/谐振Key words
EMC/EMS/Surge/Distributed capacitance/Resonance oscillation分类
信息技术与安全科学引用本文复制引用
任国兵,阮兆忠,张宝玉,刘玉辉,米春龙..冰箱浪涌测试损坏变频板机理和解决方案[J].家电科技,2024,(z1):328-332,5.
