级联式高压变频器供电异步电机的无速度传感器矢量控制系统设计

发布时间：2018-04-11 08:37

本文选题：级联式高压变频器 + 异步电机　；参考：《山东大学》2017年硕士论文

【摘要】：高压变频器通常用于两类行业:一类是用以节能减排的风机类行业;另一类以工艺调速为目的的行业,比如橡胶,水泥等行业。级联式高压变频器具有输入、输出侧谐波小,单元采用低压拓扑、安全可靠,驱动电机功率大等优点,具备越来越高的应用价值。考虑到有些场合下受现场条件限制无法安装速度传感器,且标量控制又无法满足高精度的要求,因此研究无速度传感器矢量控制方案就显得尤为重要。本文在研读了大量文献的基础上,对其拓扑结构以及异步电机无速度传感器的矢量控制方案开展了详细的研究。主要内容如下:1.在分析了多种多电平拓扑的基础上,讨论了级联式高压变频器的拓扑结构。对其中所涉及到的移相变压器及PWM调制方案进行了深入研究。2.在建立了异步电机状态空间方程之后,讨论了基于转子磁链定向的矢量控制方案。3.针对电机参数对转子磁链矢量估计精度的影响以及无速度传感器方案的需要,提出和设计了一种转子磁链自适应观测器。同时,依据Popov理论,合理的构建了相应的转速自适应律。所设计的观测器充分考虑了低速不稳定性以及电机参数对转速估计精度的影响,满足了转子磁链的估算高精度和高可靠性的要求。4.本文以STM32F103ZE+A3P600的ARM+FPGA架构为基础,建立了5级联高压变频器实验平台。在此基础上,实现了包括矢量控制算法、SVPWM调制、转子磁链自适应观测器在内的各个功能,最终对间接磁场定向矢量控制系统的整体方案进行调试与测试,验证该方案是有效的、可靠的。
[Abstract]:High voltage converters are usually used in two industries: one is the fan industry for energy saving and emission reduction; the other is for the purpose of speed regulation, such as rubber, cement and so on.The cascaded high voltage inverter has the advantages of low voltage topology, high power and high power, so it has more and more application value.Considering that in some cases the speed sensor can not be installed due to the field conditions and scalar control can not meet the requirement of high precision, it is particularly important to study the vector control scheme without velocity sensor.Based on a large number of literatures, the topology and vector control scheme of speed sensorless asynchronous motor are studied in detail in this paper.The main content is as follows: 1.Based on the analysis of various multilevel topologies, the topology structure of cascaded high voltage inverter is discussed.The phase shift transformer and PWM modulation scheme are studied. 2. 2.After establishing the state space equation of asynchronous motor, the vector control scheme based on rotor flux orientation is discussed.Aiming at the effect of motor parameters on rotor flux vector estimation accuracy and the need of speed sensorless scheme, an adaptive rotor flux observer is proposed and designed.At the same time, according to the Popov theory, the corresponding speed adaptive law is constructed reasonably.The designed observer fully considers the low speed instability and the effect of motor parameters on the speed estimation accuracy, which meets the requirements of high precision and high reliability of rotor flux estimation.Based on the ARM FPGA architecture of STM32F103ZE A3P600, a 5 cascade high voltage converter experiment platform is established in this paper.On this basis, various functions including vector control algorithm SVPWM modulation and rotor flux adaptive observer are realized. Finally, the overall scheme of indirect flux oriented vector control system is debugged and tested, which proves that the scheme is effective.Reliable.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM343;TP273

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