摘要
分析了某小功率LED灯在电磁兼容认证过程中谐波电流不合格的原因,并提出了两种整改措施,即增加负载功率、改进整流滤波电路。最后,结合整改前后的测试数据验证了方法的有效性。
This article firstly discusses a low-power LED light failed in the harmonic current test of EMC certification. Basic circuit and the failure reasons are analyzed. According to the testing standards, two kinds of corrective measures are proposed： to increase load power or to improve the rectifier filter circuit. Finally ,the combination of the test data before and after rectification verifies the effectiveness of the two methods.
关键词
LED
电容降压
谐波电流
整改
LED
capacitor dropping voltage
harmonic currents
rectification
