低噪声三相异步电动机-本科毕业设计论文.docVIP

PAGE 本科毕业设计（论文） 低噪声三相异步电动机 学 院 专 业 电气工程及其自动化 年级班别 学 号 学生姓名 指导教师 年 月 日 摘 要 电机是产生噪声的声源之一，电机又在家庭、商业、办公室以及工农医等行业广泛地应用着，与人民的生活密切相关。随着科学技术的发展和人类环保意识的加强，人们越来越重视环境的噪声污染问题。因此，电机的噪声成为考核产品竞争力的一个重要因素。 普通三相异步电机的噪声可分为机械噪声、通风噪声和电磁噪声，其中电磁噪声是较难以降低的。为提高电动机的品质，必须采取措施削弱电磁噪声。本文主要针对电机的电磁噪声进行研究、分析和论述。 首先，分析了三相异步电机电磁噪声的来源以及各种影响电磁噪声的因素，主要对电磁噪声的大小与电机气隙内的谐波磁场及由此产生的电磁力波进行研究。 其次，分析了降低电磁噪声可采取的几种措施，包括：降低气隙磁密、加大气隙、转子采用斜槽、改变定转子槽配合等，并选用改变定转子槽配合为主要措施来进行分析。 再次，本文将以Y160 L-6 11kw异步电机为实例，通过改变定转子槽配合，然后进行径向力波分析和对比各项主要参数，得出一个以降低电磁噪声为主要目标的满足毕业设计任务要求的改进方案。 最后，本文简单介绍其它降低三相异步电机噪声的方法。 关键词：异步电动机，电磁噪声，槽配合，径向力波 Abstract Electrical motor noise is generated by one of the sound source, motor as also in the family, commercial, office and medical and agricultural industries with extensive application , and it’s closely related to the peoples’ life. Along with the development of science and technology of mankind and to strengthen environmental awareness, there is a growing importance to environmental noise pollution problems. Therefore, the electrical motor noise assessment as the competitiveness of products, an important factor. Ordinary three-phase asynchronous motor noise can be divided into mechanical noise, ventilation noise and electromagnetic noise, electromagnetic noise is more difficult to lower. In order to improve the quality of motors, measures must be taken to reduce electromagnetic noise. This thesis mainly deals with the electromagnetic noise of the motor for research, analysis and exposition. First, I analysis the three-phase induction motor electromagnetic noise sources and effects of electromagnetic noise factor, mainly right electromagnetic noise and the size of the motor gap harmonic magnetic field and the resulting wave electromagnetic force study. Secondly, I analysis the electromagnetic noise reduction can be taken several measures, including : lower flux density,