新型表面—内置式永磁同步电机电磁设计及优化

发布时间：2018-03-06 05:18

本文选题：表面-内置式永磁同步电机　切入点：等效磁路法　出处：《河南理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：传统的永磁同步电机一般分为表面式永磁同步电机和内置式永磁同步电机。前者相对于后者而言,弱磁调速范围小、功率密度低,但具有动态响应快、转矩脉动小的特点,比较适合用于伺服驱动;而后者在永磁转矩的基础上叠加了磁阻转矩,磁阻转矩的存在有益于提高电机的过载能力和功率密度,易于弱磁调速,但转矩脉动大,漏磁凸出,需要设计隔磁桥,机械强度稍差。结合以上两种永磁同步电机的优点,将两者结合,提出一种新型表面-内置式混合转子的永磁同步电机,本文对这种新型电机进行优化设计。本文结合典型永磁转子结构特点,提出了新型表面-内置式混合转子的结构,初步设计电机的定转子及气隙等结构尺寸,确定电机的定转子结构参数;计算表面-内置式永磁同步电机的电磁参数,建立电机的等效磁路模型,对内置永磁体体积和表面永磁体体积的比值、内外两部分永磁体的尺寸进行优化设计,得到随着不同参数变化时电机的效率、功率因数的曲线图,对比不同参数下电机的转矩波动和力能指标,获取电机永磁体的比值与尺寸的优化结果;在电机参数和永磁体用量相等的情况下,采用有限元法建立表面式永磁同步电机、内置式永磁同步电机和表面-内置式永磁同步电机的仿真模型,对电机的永磁体形状及尺寸进行优化设计,计算电机的转矩波动和力能指标等性能参数;采用有限元法对表面-内置转子式永磁同步电机的内外永磁体体积的比值和永磁体形状进行优化,对比分析磁路法和有限元法的计算结果,验证了设计及优化电机参数的合理性和此结构电机性能的优越性。
[Abstract]:The traditional permanent magnet synchronous motor is generally divided into surface permanent magnet synchronous motor and built-in permanent magnet synchronous motor. Compared with the latter, the former has the characteristics of low speed range of weak magnetic field and low power density, but has the characteristics of fast dynamic response and low torque ripple. The latter is suitable for servo drive, and the latter has superimposed magnetoresistive torque on the basis of permanent magnetic torque. The existence of magnetoresistive torque is beneficial to improve the overload ability and power density of the motor, and is easy to adjust speed with weak magnetic field, but the torque ripple is large, and the flux leakage is protruded. It is necessary to design the magnetic isolation bridge, and the mechanical strength is slightly lower. Combining the advantages of the two kinds of permanent magnet synchronous motors, a new type of surface-built-in hybrid rotor permanent magnet synchronous motor (PMSM) is proposed. This paper optimizes the design of this new type of motor. According to the structural characteristics of typical permanent magnet rotor, the structure of a new type of surface-built-in hybrid rotor is proposed, and the structure dimensions of stator, rotor and air gap of the motor are preliminarily designed. Determining the stator and rotor structure parameters of the motor, calculating the electromagnetic parameters of the surface-built-in permanent magnet synchronous motor, establishing the equivalent magnetic circuit model of the motor, the ratio of the volume of the built-in permanent magnet to the volume of the surface permanent magnet, The dimension of the permanent magnet is optimized, and the curves of motor efficiency and power factor are obtained with the change of different parameters, and the torque fluctuation and force energy index of the motor under different parameters are compared. The optimization results of the ratio and size of the permanent magnet are obtained, and the surface permanent magnet synchronous motor is established by the finite element method under the condition of the same parameters and the same amount of the permanent magnet. The simulation models of the built-in permanent magnet synchronous motor and the surface-built-in permanent magnet synchronous motor are used to optimize the shape and size of the permanent magnet and to calculate the torque ripple and the force and energy index of the motor. The ratio of inner and outer permanent magnet volume and the shape of permanent magnet are optimized by finite element method. The results of magnetic circuit method and finite element method are compared and analyzed. The rationality of the design and optimization of motor parameters and the superiority of this structure are verified.
【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341

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