永磁直流电机的EMI抑制
EMI Suppression of Permanent-Magnet DC Motor
摘要 永磁直流电机在小家电和电动玩具中应用非常广泛,电机在工作时会产生电磁干扰,对周围的电子设备和人员产生一定的危害。阐述了永磁直流电机的结构、工作原理和产生电磁干扰的原因。通过对电机电磁干扰(端子骚扰电压、骚扰功率、辐射骚扰)的测试,分析电机存在的电磁干扰并给出解决措施,从而进一步分析这些措施的有效性。并得出抑制永磁直流电机电磁干扰的最佳方案。
关键词 永磁直流电机;电磁干扰;端子骚扰电压;骚扰功率;辐射骚扰;抑制;小家电;电动玩具
Abstract Permanent-Magnet DC Motor was widely used in small domestic electrical
appliances and electronic toys.The Motor generates EMI when working,which is harmful
to the electronic equipment nearby and human.This article describes the structure and
principle of the Motor and the reason of generating EMI. It also puts up several
solutions through the analysis and testing of EMI caused by the motor (including
Terminal disturbance voltages, Disturbance power and radiated disturbance) and
concludes with a best solution via analyzing their advantages and validity.
Keywords permanent-Magnet DC Motor;EMI;terminal disturbance voltages;
disturbance power radiated disturbance;suppression;small domestic electrical
appliances;electronic toys
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