【作者】 张宇；

【导师】 邓先明；

【作者基本信息】 中国矿业大学 ， 电气工程（专业学位）， 2025， 硕士

【摘要】 由于永磁同步电机有着功率密度高、瞬时功率大、功率因数高以及控制精度高等优点,为此被广泛应用于工业机器人、轨道交通及电动汽车等方面。但是由于其功率大且散热环境恶劣,导致永磁同步电机存在着内部温度过高的风险。当永磁同步电机转子温度过高时,可能会导致永磁体失磁甚至退磁,这直接导致了电机性能的降低甚至电机的损坏。如果能提前对转子的温度进行监测就能控制电机始终运行在安全的工况,所以永磁同步电机的转子温度监测对其可靠运行有着重大的意义。针对永磁同步电机转子温度和转子位置测量方面,提出了一种电机转子位置和转子温度集成监测装置。该装置主要由环形耦合变压器和磁阻式旋转变压器集成而来,两者分别用于对电机转子的位置和温度进行监测。本文通过了有限元仿真软件对其展开了设计和优化的研究。首先,介绍了电机转子位置和温度监测装置的拓扑结构及其集成磁路设计。然后从装置的等效磁路和等效电路进行分析,分别介绍了其转子位置和转子温度的测量原理。并且对电机转子位置和温度集成监测装置的定转子结构的参数、绕组绕线方式及材料的选择进行了初步确定。接着明确了装置的性能指标,按照初始参数通过有限元仿真软件建立了仿真模型。通过对模型的仿真结果进行了分析,发现由于磁路的集成导致了漏磁通的增加,对其位置测量精度产生了较大的影响。随后从定子和转子两个维度对定子齿宽、定子开口槽、纵向长度、最小气隙长度和基波系数等关键参数进行了单参数扫描,分别分析了各个结构参数对性能的影响。通过对其分析选取了其中关键的结构参数来进行后续的优化。其次选择了田口法对装置进行综合优化,选取对性能影响较大的结构参数并确认了其优化范围。通过正交表对最小气隙长度、定子齿宽、基波系数及开口槽等参数进行优化,对优化结果进行了分析和验证。同时为了进一步消除三次谐波在转子形状公式中注入三次分量,经仿真验证了其对优化的有效性。最后按照所优化的参数制作了样机,并搭建了测试平台。通过测试平台对样机进行了对比实验,通过实验验证了集成监测装置的可行性。同时结合有限元软件对可能产生误差的因素进行了分析。更多还原

【Abstract】 Due to the advantages of high power density,high instantaneous power,high power factor and high control accuracy,permanent magnet synchronous motor is widely used in industrial robots,rail transit and electric vehicles.However,due to its large power and bad heat dissipation environment,there is a risk of high internal temperature of permanent magnet synchronous motor.When the rotor temperature of permanent magnet synchronous motor is too high,it may cause the permanent magnet to lose magnetism or even demagnetization,which directly leads to the motor performance reduction or even the motor damage.If the temperature of the rotor can be monitored in advance,the motor can be controlled to always run in a safe working condition,so the rotor temperature monitoring of the permanent magnet synchronous motor has great significance for its reliable operation.Aiming at the measurement of rotor temperature and rotor position of permanent magnet synchronous motor,an integrated monitoring device for rotor position and rotor temperature is proposed.The device is mainly integrated by a ring coupling transformer and a reluctance rotary transformer,which are used to monitor the position and temperature of the motor rotor respectively.In this thesis,the finite element simulation software is used to study its design and optimization.Firstly,the topological structure of the rotor position and temperature monitoring device and its integrated magnetic circuit design are introduced.Then the equivalent magnetic circuit and equivalent circuit of the device are analyzed,and the measurement principles of rotor position and rotor temperature are introduced respectively.The parameters of fixed rotor structure,winding mode and material selection of the motor rotor position and temperature integrated monitoring device are preliminarily determined.Then the performance index of the device is defined,and the simulation model is established by the finite element simulation software according to the initial parameters.By analyzing the simulation results of the model,it is found that the leakage flux increases due to the integration of the magnetic circuit,which has a great influence on the accuracy of its position measurement.Then the key parameters such as stator tooth width,stator opening slot,longitudinal length,minimum clearance length and fundamental wave coefficient are scanned from two dimensions of stator and rotor,and the influence of each structural parameter on the performance is analyzed respectively.Through the analysis of the key structural parameters selected for the subsequent optimization.Secondly,the Taguchi method is selected to optimize the device comprehensively,and the structural parameters which have great influence on the performance are selected and the optimization range is confirmed.The parameters of minimum gap length,stator tooth width,fundamental wave coefficient and opening slot are optimized by orthogonal table,and the optimization results are analyzed and verified.At the same time,in order to further eliminate the third harmonic,the cubic component is injected into the rotor shape formula,and the effectiveness of the optimization is verified by simulation.Finally,according to the optimized parameters,a prototype is made and a test platform is built.The feasibility of the integrated monitoring device is verified by the comparison experiment of the prototype on the test platform.At the same time,the possible error factors are analyzed with the finite element software.更多还原