【作者】 钟斌；

【导师】 黄玉水；

【作者基本信息】 南昌大学 ， 电力电子与电力传动， 2018， 硕士

【摘要】 无刷双馈电机起源于串级异步电机,具有体积小、可靠性高、变频器容量小、维护简单等优点。在要求变速恒频的风力发电领域已经得到广泛应用。在提倡节能和环保的大环境下,电动汽车发展迅速,无刷双馈电机在电动汽车领域越来越受到国内外的关注。本文以一种新型磁场调制式无刷双馈电机作为研究对象,建立其双旋转坐标系数学模型,并在该数学模型的基础上提出了基于矢量控制的SVPWM调制技术,并通过仿真与试验验证了该模型及控制策略的正确性。论文主要完成以下几个方面的研究。首先,本文从双馈磁场调制电机的结构和等效磁路角度出发,研究电机电磁作用机理,根据调磁转子对内外两个定子绕组之间的耦合作用,对其三相静止坐标系下的数学模型进行双旋转变换,得到双旋转坐标系下的数学模型。相比于原来的数学模型,变换后模型阶次降低,线性关系增强,可控性更高。其次,以双旋转坐标系下双馈磁场调制电机的数学模型为基础,分别提出了基于磁链矢量定向和基于电压矢量定向的控制方案。两种控制方案都实现了电机转矩分量和励磁分量的解耦控制。文章还分析和推导了两种情况下内定子前馈补偿控制的电压补偿项,实现了电压扰动项和耦合项的补偿。然后,根据电机数学模型和两种控制策略分别搭建了MATLAB/Simulink的仿真模型,对两种控制方法分别进行了仿真验证,对仿真波形进行了分析,证明了本文推导的电机数学模型的可用性,两种算法也都能实现有效控制且控制系统稳定。最后,搭建实验平台对样机进行了实验研究。验证了本文仿真实验的正确性。更多还原

【Abstract】 Brushless doubly-fed machines originating from Cascade asynchronous motor have the advantages of small size,high reliability,small inverter capacity,and simple maintenance,and have been widely used in the field of wind power generation which requiring variable speed constant frequency.In the context of advocating energy conservation and environmental protection,electric vehicles have developed rapidly.Brushless double-feedback motors have attracted more and more attention from home and abroad in the field of electric vehicles.In this paper,a new type of magnetic field modulated brushless doubly-fed motor is taken as the research object,and its dual-rotation coordinate coefficient model is established.Based on this mathematical model,SVPWM modulation technology based on vector control is proposed.The simulation and experiment verify the correctness of the model and control strategy.Thesis mainly completes the following researches.First of all,from the point of view of the structure and the equivalent magnetic circuit of double-fed magnetic field modulating motor,the mechanism of electromagnetic action of the motor is studied.According to the coupling effect between the two stator windings inside and outside caused by the magnetizing rotor,double rotation transformation is carried out for its mathematical model under three dimensional static coordinate system.Compared with the original mathematical model,the order of the transformed model is reduced,the linear relationship is enhanced,and the controllability is higher.This lays the foundation for the theoretical study of the vector control of the motor.Secondly,based on the mathematical model of doubly-fed magnetic field modulating motor in double-rotating coordinate system,the control methods based on flux vector orientation and voltage vector orientation were proposed.Both control schemes achieve decoupling control of the motor torque component and the excitation component.The article also analyzes and derives the voltage compensation term of the inner stator feed forward compensation control under two conditions,and realizes the compensation of the voltage disturbance term and the coupling term.Then,a MATLAB/Simulink simulation model was built according to the motor mathematical model and two control strategies respectively.The two control methods are simulated respectively.The analysis and comparison of the simulation waveforms prove the availability of the mathematical model derived in this paper.The two algorithms can also get good control effect and the control system is stable.Finally,an experimental platform was set up to conduct an experimental study on the prototype.The correctness of this simulation experiment was verified.更多还原