【摘要】：開關(guān)磁阻電機(jī)(Switched Reluctance Motor,SRM)自問世以來,作為一種新型調(diào)速驅(qū)動(dòng)系統(tǒng),開關(guān)磁阻電機(jī)以其結(jié)構(gòu)簡(jiǎn)單、低成本、高效率、優(yōu)良的調(diào)速性能和靈活的可控性,愈來愈得到人們的認(rèn)可和應(yīng)用。已成功應(yīng)用于在電動(dòng)車用驅(qū)動(dòng)系統(tǒng)、家用電器、工業(yè)應(yīng)用、伺服系統(tǒng)、高速驅(qū)動(dòng)、航空航天等眾多領(lǐng)域中,成為交流電機(jī)調(diào)速系統(tǒng)、直流電機(jī)調(diào)速系統(tǒng)和無刷直流電機(jī)調(diào)速系統(tǒng)的強(qiáng)有力競(jìng)爭(zhēng)者。SRM固有的雙凸極結(jié)構(gòu)導(dǎo)致它在工作的過程中轉(zhuǎn)矩脈動(dòng)大,噪音問題突出,限制了其在很多精密場(chǎng)合的應(yīng)用。它的雙凸極結(jié)構(gòu)、磁路的飽和性使其是一個(gè)多變量、非線性和強(qiáng)耦合的系統(tǒng)。為了降低SRM轉(zhuǎn)矩脈動(dòng),目前已經(jīng)開發(fā)出了很多種控制方法,比如:線性化控制、變結(jié)構(gòu)控制、迭代學(xué)習(xí)控制、智能控制理論等。本文以三相6/4開關(guān)磁阻電機(jī)為研究對(duì)象,將反步控制器分別應(yīng)用于速度環(huán)、轉(zhuǎn)矩環(huán)和磁鏈環(huán),提出了一種基于反步控制(Back Stepping Control,BSC)的開關(guān)磁阻電機(jī)控制方法,主要工作如下:首先,學(xué)習(xí)認(rèn)識(shí)反步控制法的原理,了解一般非線性、強(qiáng)耦合系統(tǒng)中反步控制器的特點(diǎn)和建立過程,分析反步控制法運(yùn)用于開關(guān)磁阻電機(jī)調(diào)速系統(tǒng)中的可行性。其次,分析開關(guān)磁阻電機(jī)線性模型、準(zhǔn)線性模型以及非線性模型之間的不同,選擇準(zhǔn)線性模型作為開關(guān)磁阻電機(jī)反步控制器的設(shè)計(jì)依據(jù)。接著建立電機(jī)的反步模型,根據(jù)反步模型依次設(shè)計(jì)速度反步控制器、轉(zhuǎn)矩反步控制器和磁鏈反步控制器,將他們連接起來形成速度環(huán)和磁鏈環(huán),對(duì)電機(jī)實(shí)行雙環(huán)控制。最后,根據(jù)速度環(huán)提供的電壓給定值選擇電壓PWM控制器,根據(jù)磁鏈環(huán)提供的給定電流值選擇電流斬波控制器。于此完成開關(guān)磁阻電機(jī)反步控制器的設(shè)計(jì)。用MATLAB仿真模塊分別建立開關(guān)磁阻電機(jī)反步控制器模型、開關(guān)磁阻電機(jī)電流斬波控制器模型和開關(guān)磁阻電機(jī)直接轉(zhuǎn)矩控制器模型,仿真結(jié)果對(duì)比表明此方案能夠有效地減小轉(zhuǎn)矩、磁鏈、電流脈動(dòng),魯棒性強(qiáng),達(dá)到了理論預(yù)期結(jié)果。本文研究對(duì)于SRM的應(yīng)用推廣具有重要意義。
[Abstract]:Since the advent of switched reluctance Motor (Switched Reluctance Motor), as a new speed regulation drive system, switched reluctance motor (SRM) is characterized by its simple structure, low cost, high efficiency, excellent speed regulation performance and flexible controllability. More and more people recognize and apply. Has been successfully used in electric vehicle drive system, home appliances, industrial applications, servo systems, high-speed drive, aerospace and other fields, become AC motor speed control system, The double salient structure inherent in DC motor speed control system and brushless DC motor speed governing system leads to its large torque ripple and prominent noise problem, which limits its application in many precision situations. Its doubly salient structure and saturation of magnetic circuit make it a multivariable, nonlinear and strongly coupled system. In order to reduce SRM torque ripple, many control methods have been developed, such as linearization control, variable structure control, iterative learning control, intelligent control theory and so on. This paper takes three-phase 6 / 4 switched reluctance motor as research object, applies backstepping controller to speed loop, torque loop and magnetic chain ring, and presents a control method of switched reluctance motor based on backstepping control (Back Stepping control. The main work is as follows: first, Learn the principle of backstepping control method, understand the characteristics and establishment process of backstepping controller in general nonlinear and strong coupling system, and analyze the feasibility of using backstepping control method in switched reluctance motor speed control system. Secondly, the differences among the linear model, quasi-linear model and nonlinear model of switched reluctance motor are analyzed, and the quasi-linear model is chosen as the basis for the design of the backstepping controller of switched reluctance motor. Then, the speed backstepping controller, the torque backstepping controller and the flux chain backstepping controller are designed according to the backstepping model of the motor. The speed loop and the magnetic chain loop are connected together, and the motor is controlled by double loop. Finally, the voltage PWM controller is selected according to the given voltage value provided by the speed loop, and the current chopper controller is selected according to the given current value provided by the magnetic link. The design of the switched reluctance motor backstepping controller is completed. The MATLAB simulation module is used to establish the switched reluctance motor backstepping controller model, the switched reluctance motor current chopper controller model and the switched reluctance motor direct torque controller model respectively. The simulation results show that this scheme can effectively reduce the torque. Flux, current pulsation, strong robustness, reach the expected theoretical results. The research in this paper is of great significance to the application and popularization of SRM.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM352

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本文編號(hào)：2171664