本文關(guān)鍵詞：永磁同步電機(jī)直接轉(zhuǎn)矩控制優(yōu)化研究　出處：《中北大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 永磁同步電機(jī) 直接轉(zhuǎn)矩控制 模糊控制 空間矢量脈寬調(diào)制

【摘要】：永磁同步電機(jī)(PMSM)由高性能永磁材料提供勵(lì)磁,它具有高效率、高功率密度等突出優(yōu)點(diǎn),成為近年來(lái)研究的熱點(diǎn),現(xiàn)在航天、汽車、工業(yè)生產(chǎn)等領(lǐng)域多采用該電機(jī)。永磁同步電機(jī)控制方法中直接轉(zhuǎn)矩控制(DTC)是繼矢量控制之后一種非常重要的控制方法,該方法具有響應(yīng)速度快、結(jié)構(gòu)簡(jiǎn)易、魯棒性強(qiáng)等特點(diǎn),但也存在轉(zhuǎn)矩脈動(dòng)大等問題,因此本文主要針對(duì)電磁轉(zhuǎn)矩脈動(dòng)大的問題展開優(yōu)化研究。本文首先介紹了永磁同步電機(jī)以及直接轉(zhuǎn)矩控制方法的現(xiàn)狀與發(fā)展趨勢(shì),推導(dǎo)出了永磁同步電機(jī)數(shù)學(xué)模型,找出各個(gè)模型之間轉(zhuǎn)化關(guān)系,然后對(duì)傳統(tǒng)永磁同步電機(jī)直接轉(zhuǎn)矩控制系統(tǒng)進(jìn)行了模型的建立,研究分析得到其具有響應(yīng)速度快的特點(diǎn)但同時(shí)存在脈動(dòng)大等不足。針對(duì)以上問題,本文主要從兩個(gè)方向?qū)ζ滢D(zhuǎn)矩脈動(dòng)大這一問題展開了研究:第一是從控制方法出發(fā),就磁鏈滯環(huán)、轉(zhuǎn)矩滯環(huán)形式單一問題展開研究,采用模糊控制器代替滯環(huán)控制器,該控制器從Matlab模糊控制箱模塊進(jìn)行搭建,仿真分析得出結(jié)論,這對(duì)于DTC系統(tǒng)轉(zhuǎn)矩脈動(dòng)大具有一定的改善作用;第二是從系統(tǒng)本身出發(fā),本文將空間矢量脈寬調(diào)制技術(shù)(SVPWM)引入到PMSM DTC系統(tǒng)中,采用了基于SVPWM的直接轉(zhuǎn)矩控制的方案,這可以從根本上解決傳統(tǒng)DTC存在的問題。然后采用Matlab/Simulink工具對(duì)SVPWM DTC系統(tǒng)進(jìn)行了仿真,并比照傳統(tǒng)DTC的仿真結(jié)果驗(yàn)證了基于SVPWM DTC的優(yōu)越性。
[Abstract]:PMSM (permanent Magnet synchronous Motor) is excited by high performance permanent magnet material. It has many outstanding advantages such as high efficiency, high power density and so on. The direct torque control (DTC) is a very important control method after vector control, which has high response speed. The structure is simple, the robustness is strong, but there are some problems such as large torque ripple and so on. Therefore, this paper mainly focuses on the optimization of electromagnetic torque ripple. Firstly, this paper introduces the current situation and development trend of permanent magnet synchronous motor and direct torque control methods. The mathematical model of permanent magnet synchronous motor (PMSM) is derived and the transformation relationship between the models is found. Then the model of traditional PMSM direct torque control system is established. Through the research and analysis, it is found that it has the characteristics of fast response speed but at the same time, there are some shortcomings, such as large pulsation, etc. In this paper, the torque ripple is studied in two directions. The first is to study the hysteresis of flux chain and the single form of torque hysteresis from the control method. The fuzzy controller is used to replace the hysteresis controller. The controller is built from the Matlab fuzzy control box module. The simulation results show that the fuzzy controller can improve the torque ripple of the DTC system. Second, from the system itself, this paper introduces the space vector pulse width modulation (SVPWM) technology into the PMSM DTC system, and adopts the scheme of direct torque control based on SVPWM. This can fundamentally solve the problems existing in traditional DTC. Then the SVPWM DTC system is simulated with Matlab/Simulink tools. Compared with the simulation results of traditional DTC, the superiority of DTC based on SVPWM is verified.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM341;TP273

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本文編號(hào)：1374764