基于开绕组的永磁自减速电机开路故障容错控制研究

发布时间：2018-06-22 08:39

本文选题：永磁自减速电机 + 开绕组　；参考：《东南大学》2016年硕士论文

【摘要】：在大力提倡节能减排,低碳出行的背景下,电动汽车以其零排放、低噪音和高效率等显著优点已呈加速发展态势。本文研究用的永磁自减速电机与传统电机相比,效率高、功率密度大、可靠性强,尤其适用于驱动电动汽车。电机驱动系统是电动汽车的关键部分,传统的电机驱动系统通过普通电压型逆变器供电,这种供电方式输出的电压质量较差,能源利用率较低,容错能力较弱。基于双逆变器的开绕组结构以其直流电源利用率高,容错能力强,输出容量大等优点越来越受到人们的关注。这种结构将正常三相电机定子绕组的Y型(△型)连接点解开,定子绕组的两端分别连接一个独立标准的逆变器。本文以永磁自减速电机为研究对象,针对开绕组永磁自减速电机单相绕组开路故障的容错控制进行了深入的研究。本文的工作为进一步研究基于双逆变器的开绕组电机及其驱动系统的容错控制打下了一定的基础。论文首先介绍了永磁自减速电机、开绕组电机控制系统以及电机驱动系统容错控制的国内外研究现状。然后介绍了开绕组电机拓扑结构及其控制策略,并建立了基于开绕组的永磁自减速电机的数学模型。本文详细介绍了开绕组永磁自减速电机控制系统的工作原理,基于空间矢量脉宽调制技术(SVPWM)构建了开绕组永磁自减速电机矢量控制系统。基于Matlab/Simulink仿真平台,搭建了开绕组永磁自减速电机矢量控制系统正常运行的仿真模型,并将仿真结果与理论研究进行了对比分析,验证了该控制系统的可行性。论文重点针对开绕组永磁自减速电机单相绕组开路故障进行了研究,详细分析了其容错控制原理,采用了一种两相双H桥容错控制策略,并基于此提出了一种改进型双H桥容错控制策略来抑制电机的转矩脉动。同时,基于Matlab/Simulink仿真平台,建立了开绕组永磁自减速电机单相绕组开路故障容错控制的仿真模型,结合理论以及仿真结果的分析,验证了本文提出的开绕组永磁自减速电机矢量控制系统单相开路故障的容错控制策略。最后搭建了基于dSPACE的开绕组电机控制系统实验平台,并分别对开绕组永磁自减速电机正常运行条件下的矢量控制系统和单相绕组开路故障情况下的容错控制系统进行了实验研究,实验结果表明开绕组永磁自减速电机控制系统具有良好的动态性能和容错运行能力。
[Abstract]:In the context of energy saving and low carbon travel, electric vehicles have been accelerating with their advantages of zero emission, low noise and high efficiency. Compared with the traditional motor, the permanent magnet self-decelerating motor used in this paper has the advantages of high efficiency, high power density and high reliability, so it is especially suitable for driving electric vehicles. The motor drive system is the key part of electric vehicle. The traditional motor drive system is supplied by the common voltage source inverter. The output voltage quality is poor, the energy efficiency is low, and the fault tolerance is weak. The open winding structure based on double inverter has attracted more and more attention because of its high utilization of DC power, strong fault tolerance and large output capacity. This structure unlocks the Y-type connection point of the stator winding of the normal three-phase motor, and the two ends of the stator winding are connected with an independent standard inverter. In this paper, the fault tolerant control of single-phase winding open circuit fault of open-winding permanent magnet self-decelerating motor is studied. The work of this paper lays a foundation for further research on fault tolerant control of open winding motor and its drive system based on double inverter. Firstly, this paper introduces the research status of permanent magnet self-decelerating motor, open-winding motor control system and fault tolerant control of motor drive system at home and abroad. Then the topology and control strategy of open-winding motor are introduced, and the mathematical model of permanent magnet self-decelerating motor based on open-winding is established. In this paper, the working principle of open-winding permanent magnet self-decelerating motor control system is introduced in detail, and the vector control system of open-winding permanent magnet self-decelerating motor is constructed based on space vector pulse width modulation (SVPWM) technology. Based on Matlab / Simulink simulation platform, the simulation model of vector control system of open-winding permanent magnet self-decelerating motor is built. The simulation results are compared with the theoretical research, and the feasibility of the control system is verified. In this paper, the open circuit fault of single-phase winding of open-winding permanent magnet self-decelerating motor is studied, and its fault-tolerant control principle is analyzed in detail, and a two-phase dual H bridge fault-tolerant control strategy is adopted. Based on this, an improved dual H bridge fault-tolerant control strategy is proposed to suppress the torque ripple of the motor. At the same time, based on Matlab / Simulink simulation platform, the simulation model of single-phase open-circuit fault tolerant control of open-winding permanent magnet self-decelerating motor is established. The fault tolerant control strategy for single phase open circuit fault of open winding permanent magnet self-decelerating motor vector control system proposed in this paper is verified. Finally, an experimental platform of open winding motor control system based on DSpace is built. The vector control system of open-winding permanent magnet self-decelerating motor under normal operation and the fault-tolerant control system of single-phase winding open circuit fault are studied experimentally. The experimental results show that the open winding permanent magnet self-decelerating motor control system has good dynamic performance and fault-tolerant operation ability.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.72

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