关键词: 座椅舒适性系统, 永磁直流电机, 电磁噪声, 机械噪声, 电磁仿真

Abstract: The noise source of a type of air pump motor applied on automobile seat was analyzed and identifid. The simulation and experimental optimization measureswere adopted for electromagnetic noise and mechanical noise respectively. So that the amplitude of no-load noise at main frequency bands and the total noise of the motor were reduced to a targeted range to meet the design requirements. The results show that in terms of electromagnetic noise, rationally changing the eccentricity of the arc surface of magnet is beneficial to reduce the noise level. In terms of mechanical noise, it is also very important to select the appropriate torsional spring for the carbon brush and control the radial clearance of the ball bearing. The results of the study and validation provide effective theoretical support and experimental evidence to the noise improvement of similar motors.

Key words: seat comfort system,permanent magnet DC motor, electromagnetic noise, mechanical noise, electromagnetic simulation