作　　者： (张力伟）; (王仲太）; (刘治敏）;

机构地区： 中检西部检测有限公司,陕西西安710032

出　　处： 《小型内燃机与车辆技术》 2017年第4期66-71,92,共7页

摘　　要： 针对电动摩托车用强制风冷型差速电机的噪声问题,提出了电动摩托车用永磁无刷直流差速电机噪声抑制技术的研究思路。首先通过大量试验数据,分析和验证了该类电机的噪声产生机理主要为气动噪声;其次,从单极源、偶极源和四极源的特性出发,阐述了该类电机由于风扇叶片和气道设计不合理而引起的气动噪声的产生过程;最后,分析了旋转声源的辐射特性,从旋转叶片的辐射噪声计算公式和特性出发探讨电动摩托车用差速电机气动噪声改进的具体方法和抑制措施。 Aiming at the noise performance of forced air-cooled differential motor for electric motorcycle,the paper puts forward the research idea of the electric motorcycle with permanent magnet brushless DC differential speed motor noise suppression technology： First, according to a lot of experimental data, it is analyzed and verified that the noise production mechanism of this kind of motor is mainly aerodynamic noise;Secondly, starting from the characteristics of single-stage source, dipole source and level four source, this paper expounds the production process of aerodynamic noise caused by unreasonable design of fan blades and airway; Finally, the radiation characteristics of rotary sound source are analyzed. This paper discusses the concrete methods and suppression technology of the aerodynamic noise improvement of differential speed motor for electric motorcycle by the calculation formula and characteristics of the radiation noise of the rotating blade.

关 键 词： 气动噪声 差速电机 仿生风扇