摘  要：风扇噪声已经成为影响办公和家庭环境的一个重要因素。介绍用于办公自动化及家庭风扇的降噪方法，并从风扇电机本体、风扇结构及空气动力学方面分析风扇的噪声源，特别是对风扇电机电磁力、固有频率和结构模态方面进行重点研究，提出改善及降噪的方法。本文得出的一些方法和结论可应用于其他领域。
关键词：无刷直流电机； 噪声；风扇电机；实验

Abstract: Noise had become an important factor to effect office automation and family automation.To sum up,fan was primary source of noise.The article introduced methods to reduce the fan noise in office automation and family automation equipments,analysed the noise source from noumenon of fan motor,structure of fan motor and aerodynamics,especially in exciting force,natural frequency and structure model of fan motor.The paper put forward the means to improve and induce noise,at the same time the analytic conclusion and measures provided the theoretical basis to apply in other field.
Key Words: Brushless direct current motor;Noise;Fan motor;Experiment