单绕组无轴承永磁同步电机绕组结构设计优化与控制系统研究

发布时间：2018-07-01 16:54

本文选题：无轴承永磁同步电机 + 三相绕组单元　；参考：《江苏大学》2017年硕士论文

【摘要】：单绕组无轴承永磁同步电机(BPMSM)继承了传统的双绕组BPMSM的功率密度高、无润滑、无磨损、无机械噪声等优势,同时内部绕组结构的优化使得电机结构更为紧凑,加工难度降低,功率损耗和成本减小,可靠性得到提高。随着生产技术革新和器件制造水平提高,工业自动化对现代永磁电机的设计与应用要求更加严格。因此,单绕组BPMSM在高速离心机、人工心脏血泵、工业机器人驱动、电动汽车飞轮储能和航天飞行器等电气传动领域具有广泛的应用前景。本文围绕单绕组BPMSM的内部结构原理、T型绕组结构方案、悬浮力矢量闭环控制策略及数字控制系统展开了研究。具体研究内容及取得的成果如下:首先,较为全面的论述了国内外BPMSM的发展历史,研究现状和应用前景,并综述了单绕组BPMSM的发展概况。在回顾了无轴承电机各类绕组结构与控制策略的基础上,提出了一种双三相BPMSM分布式单绕组拓扑结构,分析了电机径向悬浮力和电磁转矩的工作原理,建立其数学模型,并基于有限元软件ANSYS/Maxwell进行了仿真分析。同时为简化控制策略,相应地建立了一种控制电机对称相电流不平衡的控制策略,利用Matlab/simulink搭建了仿真模型进行仿真验证。其次,在双三相BPMSM绕组结构基础上,对其进行优化改进。提出了一种T型绕组结构,能够抵消掉对应相绕组内感应电动势,避免影响可控悬浮力。进一步推导数学模型,基于有限元软件比较了绕组内的感应电动势、径向悬浮力与电磁转矩。同时在该绕组结构基础上建立对应的电机控制策略,并增加了基于绕组电流观测的悬浮力矢量闭环控制环节,与位移闭环组成双闭环控制系统。利用Matlab软件与上章采用的控制策略进行仿真比较,证明了该控制策略对悬浮力控制性能和运行稳定性的改善。最后,按照上章所述T型绕组BPMSM控制策略,采用数字控制处理器TMS320F2812的设计了硬件系统电路及软件系统程序。完成了DSP最小应用系统电路、主驱动电路和信号采样电路设计与焊接工作,提供了系统控制软件程序设计流程,并与控制系统的硬件电路的联合调试。将一台双绕组BPMSM样机内部绕组重新绕制,按T型绕组结构方案接入硬件系统部分进行联合调试与实验分析,获得了有价值的测量波形,初步实现了课题研究目的和实验期望效果。
[Abstract]:Single winding bearingless permanent magnet synchronous motor (BPMSM) inherits the advantages of traditional double winding BPMSM, such as high power density, no lubrication, no wear, no mechanical noise, etc. At the same time, the optimization of internal winding structure makes the motor structure more compact and the processing difficulty reduced. The power loss and cost are reduced, and the reliability is improved. With the innovation of production technology and the improvement of the manufacturing level of devices, the design and application of modern permanent magnet motors (PMSM) are required more strictly by industrial automation. Therefore, single winding BPMSM has a wide application prospect in the fields of high-speed centrifuge, artificial heart blood pump, industrial robot drive, electric vehicle flywheel energy storage and aerospace vehicle. In this paper, the internal structure principle of single winding BPMSM and the scheme of T winding structure, the closed loop control strategy of levitation force vector and the digital control system are studied. The research contents and achievements are as follows: firstly, the development history, research status and application prospect of BPMSM at home and abroad are discussed, and the development of single-winding BPMSM is summarized. On the basis of reviewing the windings structure and control strategy of bearingless motor, this paper presents a distributed single-winding topology of dual-three-phase BPMSM, analyzes the working principle of the motor's radial suspension force and electromagnetic torque, and establishes its mathematical model. And based on the finite element software ANSYS / Maxwell, the simulation analysis is carried out. At the same time, to simplify the control strategy, a control strategy of unbalanced symmetrical phase current of motor is established, and the simulation model is built by Matlab / Simulink for simulation verification. Secondly, based on the double-phase BPMSM winding structure, it is optimized and improved. In this paper, a T type winding structure is proposed, which can cancel the inductive EMF in the corresponding phase winding and avoid the influence of controllable levitation force. Based on the finite element software, the inductive electromotive force, radial suspension force and electromagnetic torque in the windings are compared. At the same time, the corresponding motor control strategy is established on the basis of the winding structure, and the suspension force vector closed-loop control link based on the winding current observation is added, and the double closed-loop control system is composed of the displacement closed-loop control system. By using Matlab software and the control strategy adopted in the previous chapter, the simulation results show that the control strategy improves the performance and operation stability of suspension force control. Finally, according to the control strategy of T-type winding BPMSM, the hardware circuit and software program are designed with the digital control processor TMS320F2812. The design and welding of the DSP minimum application system circuit, the main drive circuit and the signal sampling circuit are completed. The program design flow of the system control software is provided, and the joint debugging with the hardware circuit of the control system is carried out. The internal winding of a dual-winding BPMSM prototype is rewound, and the T-type winding structure is connected to the hardware system for joint debugging and experimental analysis. The valuable measurement waveform is obtained. The aim of the research and the expected effect of the experiment have been preliminarily realized.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341;TP273

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