【作者】 刘涛；

【导师】 胡岩；

【作者基本信息】 沈阳工业大学 ， 电气工程， 2012， 硕士

【摘要】 复合笼型转子异步电机采用复合笼型转子来代替实心转子,转子外层采用钢套或铜铁合金层,转子内层采用普通鼠笼绕组,使电机具有实心转子感应电动机优良的起动性能,适用于重载起动;在额定运行时,电机效率和功率因数较实心转子异步电动机又有很大程度的提高,转子结构简单且坚固。复合笼型转子异步电机良好的起动性能和运行性能使其在一些重负载和大转动惯量场合具有广泛的应用前景。复合笼型转子异步电机由于转子复合层的引入,导致电机的效率和功率因数较普通异步电动机要低,并且设计方法不够完善,使得此类电机的设计成本过高。本文分别从等效电路、多层理论及有限元数值分析方法入手,研究了复合笼型转子电机的设计方法,尤其采用Ansoft Maxwell二维有限元软件深入分析了电机磁场及涡流场,并对电机的设计方法进行了研究和试验验证。采用等效电路法对复合笼型转子异步电机进行了研究。应用此法对复合笼型转子参数进行计算,进而计算出电机的性能参数,通过对比分析计算结果和实验结果,总结应用此法来解决复合笼型转子参数计算问题的优缺点。阐述了应用多层理论方法分析复合笼型转子异步电机的基本原理,应用此法对转子参数进行了计算和分析。通过分析计算结果,证明应用此法进行转子参数计算具有一定误差,但此法可以充分考虑转子各层材料磁密及磁导率随转差率的变化情况,为复合笼型转子异步电机的设计提供了一定的参考依据。基于Ansoft MAXWELL有限元软件,建立复合笼型转子异步电机的二维“场-路-运动”耦合有限元模型,直接计算电机在不同转差运行下磁场分布,进而计算电机性能参数。分析了复合层不同材料和厚度的选取对电机性能有一定的影响;通过对电机性能参数动态变化过程的分析,验证了复合笼型转子结构设计的合理性;通过对比计算结果和实验数据,验证此计算方法满足工程精度要求。更多还原

【Abstract】 Compound cage rotor is applied by compound cage rotor asynchronous instead of traditional solid rotor.Steel layers or copper and iron alloys are applied by rotor outer layer,while traditional cage winding is applied by rotor inner layer.Compound cage rotor motor has excellent starting performance the same as solid rotor motor,which is applicable for heavy dutied machine.Compound cage rotor asynchronous motor at rated speed has higher efficiency and power factor than solid rotor.Compound cage rotor is of simple construction and durability.Good starting performance and operational performance of the motor makes its wide range application in heavy load and big moment of inertia occasions.Compound layer is adopted by compound cage rotor induction motor,resulting in lower efficiency and power factor than traditional asynchronous motor.The motor design is not perfect enough,which limits development of such motor and application.Ansoft Maxwell two dimensional finite element software is applied to analyze motor magnetic field and eddy current field deeply.Deep research and expermental verification are made on design of compound cage rotor motor.Equivalent circuit method is used to research compound cage rotor motor.The rotor parameters are calculated using the method,then the motor performance parameters is computed.By comparing the analysis and experimental results,the method is proved to be relatively accurate.Basic principle of multi-layer theory analyzing compound cage rotor asynchronous motor is described.The method is applied to calculate and analyze compound cage rotor parameters.Then motor performance parameters are computed.By analyzing the results,flux density and permeability of rotor layer material variations with slips can be considered adequately,which provides a certain basis for compound cage rotor induction motor design.To accurately calculate motor parameters,Ansoft MAXWELL finite element software was applied.Two-dimension finite element model coupling field-circuit-motion was set up. Magnetic field at different slips was calculated directly.Motor performance parameters were obtained.The alloy material and depth have some influence on motor performance,which provides reference for motor optimal design.Based on analysis of motor performance parameters dynamic changes process,reasonableness of compound cage rotor structural design was testified.Compared with analytical and experimental results,the project effectiveness of the calculation method was verified.更多还原