风冷冰箱控制板风扇电机驱动电路EMI问题改善方案分析

家电科技 ›› 2018, Vol. 0 ›› Issue (9): 82-87.

风冷冰箱控制板风扇电机驱动电路EMI问题改善方案分析

阚爱梅, 周泽, 任国兵

合肥美的电冰箱有限公司安徽合肥 340100

出版日期:2018-09-01 发布日期:2019-07-12

Analysis of EMI improvement for fan motor drive circuit in main board of air-cooled refrigerator

KAN Aimei, ZHOU Ze, REN Guobing

Hefei Midea Refrigerator Co.,LTD. Hefei 340100

Online:2018-09-01 Published:2019-07-12

摘要/Abstract

摘要： 本文研究了电冰箱控制板使用Mos驱动控制风扇电机引起的电磁干扰（EMI）问题,找到了风扇电机驱动电路主要EMI干扰来源,并提出了通过调整buck电路电感使其工作在DCM模式、续流二极管并联RC吸收电路、降低Mos开关速度,三个方案来解决EMI问题。

关键词: 风扇电机, Mos, 电磁干扰, 断续工作模式, CCM, BUCK

Abstract: This paper studies the electromagnetic interference (EMI) caused by using Mos drive to control fan motor in refrigerator main board, finds out the main EMI interference sources of fan motor drive circuit, and puts forward three schemes by adjusting the inductance of buck circuit to make it work in DCM mode, adding RC snubber circuit in parallel with the fly-wheel diode or reducing Mos switching speed, to solve the EMI problem.

Key words: Fan motor, Mos, EMI, DCM, CCM, BUCK

阚爱梅, 周泽, 任国兵. 风冷冰箱控制板风扇电机驱动电路EMI问题改善方案分析[J]. 家电科技, 2018, 0(9): 82-87.

KAN Aimei, ZHOU Ze, REN Guobing. Analysis of EMI improvement for fan motor drive circuit in main board of air-cooled refrigerator[J]. Journal of Appliance Science & Technology, 2018, 0(9): 82-87.

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