永磁容错电机无位置传感器矢量控制系统实现研究

发布时间：2019-03-09 08:54

【摘要】：电机及其控制系统作为电力传动的核心环节,往往会由于各种原因产生故障。尤其在医疗、核工业等对安全性要求较高的领域中,即便电机控制系统发生了较短时间的故障,都会产生不可估量的损失。永磁容错电机具有高可靠性和容错性,因而对于上述领域的发展具有深远意义。在永磁容错电机控制系统中,目前多采用机械传感器获取电机的转子位置或转速信息,这些传感器虽然可以提供较为准确的数据信息,但同时也降低了系统的可靠性。因此,永磁容错电机无位置传感器控制技术成为电机控制领域的一个研究热点。本文主要研究了永磁容错电机无位置传感器控制技术,首先详细介绍六相永磁容错电机的基本结构及其数学模型、矢量控制系统的结构、一相开路容错控制策略和一相短路容错控制策略以及电流滞环跟踪控制策略等;其次着重分析滑模变结构的控制原理,并根据永磁容错电机的数学模型,研究基于滑模观测器的永磁容错电机的转子位置估计算法;再次针对六相永磁容错电机的结构特点,搭建基于TMS320F28335 DSP为核心的电机控制系统硬件实验平台,并设计调试基于滑模观测器的永磁容错电机无位置传感器控制系统软件。其中,实验平台硬件包括H桥逆变电路、电压电流检测电路、转子位置检测及信号调理电路、外围保护电路等。最后,在实验平台上对电机在无故障、一相开路故障状态下的矢量控制系统进行实验与分析,实验结果验证了本文提出的转子位置估计算法的正确性和可行性。
[Abstract]:As the core link of power transmission, motor and its control system often fail for various reasons. Especially in medical treatment, nuclear industry and other fields with high safety requirements, even if a short period of failure occurs in the motor control system, there will be inestimable losses. Permanent magnet fault-tolerant motor has high reliability and fault tolerance, so it has far-reaching significance for the development of above-mentioned fields. In permanent magnet fault tolerant motor control system, mechanical sensors are often used to obtain rotor position or speed information. Although these sensors can provide more accurate data information, but at the same time reduce the reliability of the system. Therefore, permanent magnet fault-tolerant motor sensorless control technology has become a research hotspot in the field of motor control. In this paper, the sensorless control technology of permanent magnet fault-tolerant motor is mainly studied. Firstly, the basic structure and mathematical model of six-phase permanent magnet fault-tolerant motor and the structure of vector control system are introduced in detail. One-phase open-circuit fault-tolerant control strategy, one-phase short-circuit fault-tolerant control strategy and current hysteresis tracking control strategy; Secondly, the control principle of sliding mode variable structure is analyzed. According to the mathematical model of permanent magnet fault tolerant motor, the rotor position estimation algorithm of permanent magnet fault tolerant motor based on sliding mode observer is studied. Thirdly, according to the structure characteristics of six-phase permanent magnet fault-tolerant motor, the hardware experiment platform of motor control system based on TMS320F28335 DSP is built, and the software of sensorless control system of permanent magnet fault-tolerant motor based on sliding mode observer is designed and debugged. The hardware of the experiment platform includes H-bridge inverter circuit, voltage-current detection circuit, rotor position detection and signal conditioning circuit, peripheral protection circuit and so on. Finally, the vector control system without fault and one-phase open circuit fault is tested and analyzed on the experimental platform. The experimental results verify the correctness and feasibility of the proposed rotor position estimation algorithm.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273;TM351

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