【作者】 刘伟；

【导师】 程树康；

【作者基本信息】 哈尔滨工业大学 ， 电气工程， 2008， 硕士

【摘要】 本文对分数槽集中绕组永磁同步电机的结构、性能特点以及参数设计进行了分析研究。论文首先分析了分数槽集中绕组电机的技术特点。在保证电机的性能指标和其他条件相同的前提下,分别对不同极槽配合的电机建立了有限元分析模型,通过仿真,从电机的效率、转矩性能、电机去磁风险等方面对不同的设计方案进行了对比分析。针对电机的转矩特性建立了数学模型,对影响电机低速转矩性能的几个关键参数进行分析,重点分析了定子裂比、每相串联匝数和永磁体参数对电机转矩性能的影响。针对转矩波动问题,分析了内置式永磁同步电机的极靴形状优化对转矩波动的影响,并以实际样机设计为例,具体说明了如何通过合理设计这几个电磁参数和优化极靴形状提高电机的低速转矩性能。弱磁扩速一直是永磁同步电机发展的瓶颈,论文对影响电机理想最高转速和功率输出能力的几个重要电磁参数进行了分析,重点对永磁磁链和直轴电感对电机弱磁扩速能力的影响进行了理论分析和有限元仿真。针对永磁同步电机低速转矩和弱磁扩速范围互相制约的问题,提出了兼顾电机的低速转矩性能和最高转速的参数设计方法。D、Q轴电感是影响永磁同步电机性能的重要参数,也是电机设计分析的难点;D、Q轴电感的预测直接关系到整个电机控制系统的性能。论文运用有限元软件对影响永磁电机电感的关键因素进行了分析和仿真,并就具体的电机设计了实验测试方法,对实验结果与仿真进行了对比分析。最后研制了实验样机,通过对样机实验数据和理论计算结果的对比,分析了实验和理论设计的误差来源,证明了本文对分数槽集中绕组永磁同步电机性能分析的正确性。更多还原

【Abstract】 In this paper, the structure, the performance characteristics and the parameters design of permanent magnet synchronous motor with fractional-slot concentrated windings have been analyzed.First, the technical feature of a permanent magnet synchronous motor with fractional-slot concentrated windings is studied. And then the motor models with different slot/pole combination were set up using finite element analysis software. Ensuring the same electrical performance and other conditions, a comparative analysis is simulated from the different aspects, such as the efficiency of the motor, the torque performance and demagnetization risk of the motor.The motor mathematical model is established from the torque characteristics, then several key parameters for the impact of low-speed torque performance is analyzed. The effect of stator split ratio, the series turns/phase and the permanent magnet parameters on the performance of torque is demonstrated in detail. For torque fluctuations, the pole shoe’s shape optimization of the interior permanent magnet synchronous motor for the torque fluctuations is analyzed, and the prototype motor for example, illustrate how to design these electromagnetic parameters and optimize the pole shoe’s shape to improve the torque performance at low-speed region.Flux weakening is a development bottleneck for a permanent magnet synchronous motor. Several important electromagnetic parameters were studied affecting the highest speed and power output capacity of the ideal motor. The permanent magnet flux and D axis inductance for the effect of the flux weakening is analyzed theoretically and simulated using the finite element analysis in detail. Considering the constraints problem between low-speed torque and the flux weakening capacity for the permanent magnet synchronous motor the parameters design method is proposed take into account the low-speed torque performance and the maximum speed.The D- and Q-axis inductances are key parameters for performance of a permanent magnet synchronous motor, and are also the difficulty of the motor design. The D- and Q-axis inductance forecast directly related to the motor control system performance. The key factor impact of permanent magnet motor inductance is analyzed using the finite element software, and the experiment is set up with the prototype motor. The finite element analysis results were compared with the experimental results.Finally, the prototype motor has been developed. Through the comparison of the experimental and the theoretical results, the error between the experimental and theoretical analysis is studied to demonstrate the effectiveness of the analysis method for permanent magnet synchronous motor with fractional-slot concentrated windings.更多还原