【作者】 安忠良；

【导师】 唐任远；

【作者基本信息】 沈阳工业大学 ， 电机与电器， 2006， 硕士

【摘要】 作为国家重点科技攻关项目“高性能稀土永磁电机的研究与开发”的一个子课题,本文围绕风机、泵类负载用超高效永磁同步电动机设计中的效率、功率因数、失步转矩等几个关键问题进行了研究,取得了工程上具有使用价值的成果。 首先,本文分析了风扇对电机效率的影响,由于本文所研究的超高效永磁同步电机是用于风机、泵类负载,转速高,风扇对电机效率的影响非常明显,传统盆式风扇的损耗在两极电机中占到了电机总损耗的3%,因此本文利用轴流风扇的特点和优点,设计了轴流风扇来替代传统的盆式风扇,通过理论计算和试验验证,达到了很好的效果。 其次,在如何提高电机效率的研究过程中,本文利用时步有限元方法,对计算公式进行了修正,达到了比较好的效果,为以后永磁电机铁耗的计算提供了理论依据。同时通过对影响铁耗、铜耗和杂散损耗的因素进行了详细的分析研究,并采取了相应的技术措施来减小这几种损耗。 然后,通过综合考虑这些因素,利用模拟退火算法对两种规格的电机进行了优化设计,对定子冲片的优化设计主要是以铜耗和铁耗之和最小为优化目标进行优化,对转子冲片设计主要是转子磁路、转子槽形、隔磁桥等进行了优化,同时也对电机的气隙长度进行了优化设计。 最后,研制成了两种规格的永磁电动机,样机取得了预期的效果并通过了省级鉴定,鉴定结论为“国际领先水平”,证明本文所研究的成果具有很好的实用价值。更多还原

【Abstract】 As a sub- project of national science and technology key project——"The Research andDevelopment of High Performance Rare Earth Permanent Magnet Machine ", this paper presents the research on several key questions of designing premium-efficiency permanent magnet synchronous motor uses in the fan or pump ,such as efficiency, power factor, pull-out torque and so on. The achievement that has value in the Engineering is obtained.First of all, in this paper the influence of the fan on the efficiency of motor is analyzed. As the premium-efficiency permanent magnet motor used in the fan and the pump, the rotating speed of motor is high, the influence of the fan on the efficiency of the motor is extremely obvious. The loss of traditional centrifugal fan is approximately 3% of total loss in 2 pole-pair motor. Therefore, in this article the characteristics and the merits of axial-flow fan are used, substituting the axial-flow fan for traditional centrifugal fan. According to the theoretical calculation and the experimental confirmation, those measures receive good effect.Next, in the process of researching how to enhances the efficiency of motor, in this paper the time-stepping finite element method is used, the calculation formula has modified, achieved good effect, the theory basis for later calculation of iron loss of permanent magnet motor is found. Meanwhile, detail analysis and research on the factors that have influence on the iron loss, the copper loss and the stray losses are conducted, the corresponding measures are taken in order to reduce these kinds of losses.Then, through synthesis considering of these factors, the optimized design of two types of motors is carried in anneal arithmetic. The optimized design of the stator lamination mainly aims for minimizing the sum of the copper loss and the iron loss. The optimized design of the rotor is taken mainly including the rotor magnetic circuit, the shape of rotor slot, magnetic bridge, etc. At the same time, the air gap length of the motor is also optimized.Finally, prototypes of permanent magnet motor of two specifications are developed.The prototypes have achieved the anticipated effect and passed the appraisal, the conclusion is "theinternational leading level". Meanwhile, it also proves that the achievement has an important value in practical application.更多还原