【作者】 刘跃；

【导师】 付东山；

【作者基本信息】 中国矿业大学 ， 电气工程（专业学位）， 2024， 硕士

【摘要】 与传统直流电机、交流异步电机、永磁同步电机相比,开关磁阻电机（Switched Reluctance Motor,SRM）具有结构简单、制造成本低以及可靠性高等优势,已广泛应用于矿车领域。但是,由于其固有的双凸极结构和单极励磁的工作方式,使得电机具有功率密度低、转矩脉动大的缺陷。相邻齿间通磁型开关磁阻电机（Adjacent Teeth Magnetic Coupled SRM,ATMC-SRM）通过采用分块式U型转子结构,使得相邻定子齿间形成磁通回路,缩短了磁通路径;相邻绕组反向串联导通的工作方式,使得内部磁路相互叠加,定子铁芯中不存在磁通反向;电机转矩由相邻绕组间自感与互感共同产生,且当自感不变时可通过互感输出转矩,从而拓宽各相绕组的导通区间,有效提升电机的转矩输出能力。本文以ATMC-SRM为研究对象,对其基本原理及电磁设计进行分析与总结;并以提升电机转矩性能为目的,选取电机本体结构参数以及控制参数作为优化变量,采用田口算法对ATMC-SRM进行多目标优化设计;最后,制造并搭建了样机实验平台进行验证。本文主要研究内容如下:首先,给出ATMC-SRM的基本结构,分析其结构特点。介绍该电机运行原理,阐明该电机相邻两相绕组反向串联导通的工作机理。推导该电机数学解析方程,并建立理想线性电感模型分析电机内部磁场分布。建立该电机等效磁网络模型,初步分析该电机的电磁性能。其次,根据所设计电机的性能指标,推导出ATMC-SRM的尺寸/功率表达式,并确定电机的初始结构参数。通过有限元法,仿真分析其静态特性与动态特性;并采用单一变量扫描法总结了定子齿宽、定子齿高、转子极宽、转子齿宽、转子槽宽、轴径、定子轭、转子轭等八个电机本体结构参数以及开通角、关断角两个电机控制参数对ATMC-SRM平均输出转矩T_av和转矩脉动系数K的影响。再次,为了进一步提升电机转矩输出能力、抑制转矩脉动,选取定子齿宽、转子齿宽、转子槽宽、转子极宽、转子轭、定子轭等六个电机本体结构参数以及开通角、关断角两个电机控制参数作为优化参数。采用田口算法对ATMC-SRM进行多目标优化设计,并得到一组各优化参数的最优组合。根据优化前后仿真结果对比,优化后提高了电机的平均输出转矩,削弱了转矩脉动,电机性能得到有效改善。最后,制造并搭建了ATMC-SRM的样机实验平台。对样机的相绕组磁链、相绕组电感和矩角特性等静态特性以及样机的动态特性进行实验验证。本文有图77幅,表13个,参考文献93篇。更多还原

【Abstract】 Switched Reluctance Motors(SRMs)have a simple structure compared to conventional DC motors,AC induction motors and Permanent Magnet Synchronous Motors,low fabrication expense and high reliability,it has been widely used in the field of mine car.However,owing to its innate biconvex pole structure and single-phase conducting operation pattern,the motor suffers from the drawbacks of low power diversity and high torque pulse.Adjacent Teeth Magnetic Coupled SRM(ATMC-SRM)adopts a block-type U-type rotor structure to form a magnetic flux circuit between adjacent stator teeth,which shortens the flux path;the self-inductance and mutualinductance between adjacent on-phase windings generate output torque when the motor is in operation,and the output torque is generated through mutual-inductance when the self-inductance is unchanged,thus widening the conduction range of each phase winding and effectively improving the torque output capability.When the motor is running,the self-inductance and mutual inductance between neighboring on-phase windings generate output torque together,and when the self-inductance is unchanged,the output torque can be generated through mutual inductance,thus widening the onphase range of each phase winding,and effectively improving the motor’s torque output capability.This thesis takes the ATMC-SRM as the object,researches and summarizes its electromagnetic design and theoretical basis;and optimisation of the structural and control design of the ATMC-SRM using the Taguchi method to increase torque intensity and dampen torque fluctuations;Finally,a protective experimental platform has been produced and built for validation.The major researches of this article are as follows.Firstly,it give the fundamental construction of the ATMC-SRM and analyze its structural features.Introduce the operation theory of the motor,and elucidate the working mechanism of the motor with two adjacent phase windings conducting in reverse series.To derive the mathematical equation of the motor,and build an ideal inductor model to analyze the inner field allocation of the motor.Set up the motor model of equivalent magnetic network,and initially analyze the magnetic property of the motor.Secondly,according to the performance index of the designed motor,the size/power expression of the ATMC-SRM is derived and the preliminary structural data of the machine were defined.By means of the finite element method,and the eight motor body dimensions,including stator teeth length,stator teeth height,and rotor pitch length,rotor tooth width,rotor slot width,shaft diameter,stator yoke and rotor,and the influence of the two control variables,opening angle and closing attitude,on the average output torque Tav and rotor speed.Off two control parameters on its average output torque Tav and torque pulsation coefficient K.Then,to increase the torque output ability further and reduce the torque ripple,six motor body dimensions,namely stator teeth depth,rotor teeth depth,rotor slot depth,rotor pole depth,rotor yoke,and stator yoke,as well as two motor control parameters,namely,turn-on angle on,and turn-off angle off,are selected as the optimization variables,and a set of optimal combinations is obtained using Taguchi algorithm for ATMC-SRM multi-objective optimization design,and finally obtained a set of optimal combinations.According to the comparison of the simulation results before and after the optimization,the average output torque of the motor is increased,the torque pulsation is suppressed,and the motor performance is effectively improved.Finally,the experimental platform of the ATMC-SRM prototype was fabricated and built.The static characteristics of the prototype,such as phase winding magnetic chain,inductance and corner-of-moment properties of the phase wound,as well as the dynamic characteristics of the prototype are tested.This thesis has 77 figures,13 tables,and 93 references.更多还原