【作者】 裴华刚；

【导师】 陈三宝；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 随着我国国民经济的快速发展，电力能源消耗越来越大，电力资源越来越紧缺。因此如何节约能源，提高效率，成了人们研究的热点。异步电机在现在工业中起了重要的作用，是耗电量最多的一种设备。那么异步电机的效率优化就成为了节约电力资源的一个有效途径。随着半导体业的快速发展，特别是数字信号处理器的出现，以及精确的异步电机模型和各种先进控制策略的提出，异步电机控制技术得到了飞速的发展。所有这些也使得精度高、调速范围宽、控制性能好的异步电机控制系统的实现成为可能。本文以提高异步电机效率为目的，在建立优化模型的基础上，通过优化算法来使异步电机效率达到最高。并在此基础上设计了基于DSP的异步电机矢量控制系统。本文主要分以下几部分进行研究：首先建立异步电机的数学模型，由于侧重于效率的研究，我们在建立等效电路时，考虑了铁损部分，使仿真模型更接近实际情况。并通过SIMULINK建立了考虑铁损的异步电机仿真模型，为接下来的仿真研究做准备。接着详细说明了异步电机的各部分损耗，并对各种损耗降低的可行性进行了分析。深入研究了异步电机轻载稳态时的效率优化问题。并分别采用基于模型的最小损耗控制、黄金分割搜索控制以及结合二者优点的混合控制，对这一问题进行了深入探讨。然后以电机控制专用DSP芯片TMS320F240为核心，设计出一套异步电机矢量控制的效率优化调速系统。文中对整个系统的硬件电路和部分软件的设计与实现作了详细的介绍。随后在已建立的异步电机矢量控制效率优化调速系统的基础上，对文中所运用的三种效率优化方法进行了仿真实验，通过对实验结果比较分析，得出模型优化算法能够明显的降低变频驱动电机的损耗，并且具有良好的动态响应能力，但易受到电机参数变化的影响；搜索法能克服了受电机参数变化影响大的缺点，却增加了收敛时间；而混合法不仅可以缩短收敛时间，而且克服了电机参数变化的影响，是一种性能优良的效率优化控制策略。文章最后指出了本课题有待近一步完善和研究的方向。更多还原

【Abstract】 With the rapid development of our national economy, the consumption of electric power is rises fleetly, and the resource of electric power is more and more short-supplied. Therefore, how to reduce the consumption of energy and keep high performance have become the hot spot that people researched.As is well known, induction motor plays an important role in modern industry, and is a kind of electric equipments which has the most power consumption. So the efficiency optimization of induction motor has become an effective way to reduce the consumption of electric power. With the development of semiconductor industry, especially the emergence of DSP, and the present of different accurate induction motor models and control strategy, the control of induction motor rapidly develop. All of those make it possible that a control system of induction motor become to reality, which has high accuracy, wide scope adjustment and efficiency.This article’s purpose is to prompt the efficiency of induct motor. Based on the optimized model and algorithm, we can get the most perfect efficiency of induction motor. The mainly research of this article includes the following parts.Firstly, a simulation model for induction motor taking core loss into account by using the build-in modules of SIMUKINK based on induction motor mathematic model is introduced, which is prepare for the following simulation.Secondly, based on the analysis of the loss of induction motor in detail, the thesis further investigates the efficiency optimal problem of induction motor with vector control under partial load and stable state. The thesis has discussed the question deeply with Loss Minimization Controller based on model, Search controller based on golden sections and Hybrid Controller.Thirdly, the article summarizes the development of DSP and its application in the motor control domain. With the peripheral circuit, a vector control efficiency optimization system based on TMS320LF2407A is built. All details of the realization of the whole hardware electric circuit of system and parts of software are introduced in the article. With a large number of simulation experiments based on the efficiency optimization system, we get the simulation results. They show that Loss Minimization Controller based on model can reduce the motor loss widely and have good dynamic performance, but easy to influence by the fact that the parameters of the motor change; Though Search controller can overcome this shortcoming, but have low convergence speed; Hybrid Controller can not only shorten the convergence time, but also overcome the problem of parameters variation. Simulation results prove that Hybrid Controller is a kind of good control strategy of optimizes efficiency.Finally, the directions and measures to be improved and studied further are pointed out.更多还原