双余度永磁同步电动机温度场分析

发布时间：2018-03-04 09:12

本文选题：双余度　切入点：永磁同步电动机　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：论文是国家自然科学基金资助项目“各相绕组间低热耦合无电磁耦合的双余度永磁同步电动机(DRPMSM)”的子课题,重点研究了双余度永磁同步电动机隔热材料设计,精确电机模型的建立与电机的温升问题。永磁同步电机以其功率密度大、体积小、控制性能好等优点被广泛应用于航空航天装备、精确制导装置以及其他精密仪器中。随着人们对可靠性和安全性的需求进一步提高,传统永磁电机越来越不能满足这一要求,余度电机应运而生。余度电机虽具有好的容错性能,但仍有很多问题存在,如容错控制较为复杂,故障时效率较低,温升问题突出等。余度电机的温升问题成为近年来的研究热点。进行对于余度电机损耗计算与温度场分析对了解电机温度分布情况以及电机的优化设计有至关重要的意义。本文以新型双余度永磁同步电动机为研究对象,结合电机的实际情况对比了不同种类的隔热材料特性和适用性,对隔热板的材料进行选取。针对集中绕组的特点,作了合理的简化,对定子绕组进行了精细化建模。将每匝导线进行等效建模,在定子槽内均匀排列,导线漆皮与浸渍漆等效为绝缘,端部绕组与槽内绕组排列相同。与传统的将定子绕组等效为一根铜棒相比。更加符合电机定子绕组绕线实际情况。对DRPMSM带额定负载双余度工作时和带0.7倍负载单余度工作时两种工况下的各部件的损耗进行了计算,得到了两种工况下的三维稳态温度分布以及关键部件的热流分布。分析了槽内绕组温度分布的特点及其原因。结合DRPMSM的特殊结构将仿真结果与实验结果进行了对比。结果表明,DRPMSM具有各相绕组间热耦合较低,并且引入电机的特殊部件隔热板的隔热效果明显,分析方法有效。最后,分析了实验结果与仿真结果误差产生的原因。
[Abstract]:This paper is a subproject of the project "Dual-redundancy permanent magnet synchronous motor (DRPMSM) with low heat coupling and no electromagnetic coupling between phase windings" funded by the National Natural Science Foundation of China. The design of insulation material for dual-redundancy permanent magnet synchronous motor (PMSM) is studied emphatically. Permanent magnet synchronous motor (PMSM) is widely used in aerospace equipment because of its high power density, small size and good control performance. In precision guidance devices and other precision instruments, with the increasing demand for reliability and safety, the traditional permanent magnet motors are increasingly unable to meet this requirement. Although the redundant motor has good fault-tolerant performance, there are still many problems, such as the fault tolerant control is more complex, the efficiency of fault is low, The temperature rise of redundant motor has become a hot topic in recent years. It is very important to calculate the loss and analyze the temperature field of the residual motor to understand the temperature distribution and the optimum design of the motor. In this paper, a new type of double redundancy permanent magnet synchronous motor is used as the research object. According to the actual situation of the motor, the characteristics and applicability of different kinds of insulating materials are compared, and the materials of the insulation plate are selected. According to the characteristics of the concentrated winding, the reasonable simplification is made. The stator winding is modeled in fine detail. The equivalent model of each turn wire is arranged evenly in the stator slot, and the wire lacquer is equivalent to the impregnated wire as the insulation. The end windings are arranged in the same order as the inner windings in the slot. Compared with the traditional method, the stator windings are equivalent to a copper rod. It is more in line with the actual situation of winding the stator windings of the motor. When the DRPMSM has dual redundancy with rated load and single load with 0.7 times load, it is more suitable for the winding of the motor stator winding. The loss of each component under two operating conditions is calculated when the redundancy is working. Three dimensional steady state temperature distribution and heat flux distribution of key components are obtained under two working conditions. The characteristics and causes of temperature distribution of winding in slot are analyzed. The simulation results and experimental results are compared with the special structure of DRPMSM. The results show that the thermal coupling between the various phase windings is relatively low in DRPMSM. The heat insulation effect of the special parts of the motor is obvious and the analysis method is effective. Finally, the causes of the error between the experimental results and the simulation results are analyzed.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341

【相似文献】