SRM控制系统混合仿真技术的研究

发布时间：2018-09-07 20:58

【摘要】：开关磁阻电机(Switched Reluctance Motor,简称SRM)控制系统,是融合控制策略、电机本体结构、电力电子装置等于一身的机电一体化系统,具有结构简单、成本低,启动性能好,可靠性高等优点,已在在工业、航空、家电等领域得到了广泛的推广和应用。现有对SRM电机的研究大多集中在控制算法和电机本体设计,然而,SRM的运行依赖于电机和控制器紧密结合的一体化驱动系统。所以单独对电机的磁场进行分析或者对电机算法进行研究,无法真实反映电机的实际特征和控制性能。针对这一问题,本文提出建立电机磁场、功率驱动电路以及电机控制算法的混合仿真系统,为电机控制性能的研究和电机设计提供一个基础的模拟平台。首先,建立SRM控制系统在Matlab环境下的数学模型,并通过对电机单相和两相激磁的控制方法进行的起动运行进行了仿真验证,证明了模型的正确性。建立了在Ansoft下的开关磁阻电机有限元分析模型,利用系统自带的Maxwell Circuit Editor软件搭建了理想化的驱动电路,模拟单相和两相激磁的控制方法,并对其进行了内部磁场的分析,通过对磁链波形、气隙磁密分布等的分析,研究了电机不同激磁方式下的磁场情况以及各种损耗分析。其次,针对Matlab环境下功率器件的数学模型理想化的问题,建立了基于Simplorer与Matlab/Simulink混合仿真的模型,在考虑电力电子器件的开关特性基础上,进行了电机控制算法的仿真研究。针对Ansoft下电机本体模型准确但是驱动控制电路理想化的特点,建立了Simplorer与Ansoft的混合仿真模型,并对系统进行了验证。最后,以Simplorer为连接的桥梁,在上述两种混合仿真模型的基础上,搭建了在Ansoft/Maxwell2D、Simplorer、Matlab/Simulink三个环境下SRM机电一体化控制系统的混合仿真系统。结果表明,该混合仿真,能真实、便捷的建立高饱和非线性的SRM本体模型,并对电机内部电磁场的变化进行有限元分析;能模拟系统中功率变换器开关器件的开关特性;能直观、方便的呈现SRM的控制器特性。
[Abstract]:The switched reluctance motor (Switched Reluctance Motor,) control system is a kind of electromechanical integration system, which has the advantages of simple structure, low cost, good startup performance and high reliability. In industry, aviation, home appliances and other fields have been widely promoted and applied. Most of the current research on SRM motor is focused on control algorithm and motor body design. However, the operation of SRM motor depends on the integration of motor and controller. Therefore, it can not reflect the actual characteristics and control performance of the motor by analyzing the magnetic field of the motor alone or studying the motor algorithm. To solve this problem, a hybrid simulation system of motor magnetic field, power drive circuit and motor control algorithm is proposed in this paper, which provides a basic simulation platform for motor control performance research and motor design. Firstly, the mathematical model of SRM control system under Matlab environment is established, and the correctness of the model is proved by the simulation of the control method of single-phase and two-phase excitation. The finite element analysis model of switched reluctance motor (SRM) under Ansoft is established. The ideal driving circuit is built by using the Maxwell Circuit Editor software of the system, and the control method of single-phase and two-phase excitation is simulated, and the internal magnetic field is analyzed. Based on the analysis of flux waveform and air gap magnetic density distribution, the magnetic field and loss analysis of motor with different excitation modes are studied. Secondly, aiming at the problem of idealized mathematical model of power device in Matlab environment, a hybrid simulation model based on Simplorer and Matlab/Simulink is established. Based on the switching characteristics of power electronic device, the simulation of motor control algorithm is carried out. A hybrid simulation model of Simplorer and Ansoft is established for the characteristics of accurate motor model under Ansoft but idealized drive control circuit, and the system is verified. Finally, the hybrid simulation system of SRM mechatronics control system under three environments of Ansoft/Maxwell2D,Simplorer,Matlab/Simulink is built on the basis of the above two hybrid simulation models based on the bridge connected by Simplorer. The results show that the hybrid simulation can set up the SRM body model with high saturation and nonlinearity, and analyze the change of electromagnetic field in the motor by finite element method, and can simulate the switching characteristics of the power converter switch device in the system. The controller features of SRM can be displayed intuitively and conveniently.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM352

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