本文選題：開(kāi)關(guān)磁阻電機(jī)　切入點(diǎn)：數(shù)學(xué)模型　出處：《哈爾濱理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：開(kāi)關(guān)磁阻電機(jī)以其結(jié)構(gòu)簡(jiǎn)單，堅(jiān)固耐用、成本低廉、控制靈活，而且還具有容錯(cuò)能力強(qiáng)、耐高溫和調(diào)速性能好等諸多優(yōu)點(diǎn)，在電動(dòng)汽車領(lǐng)域得到了廣泛應(yīng)用。電機(jī)頻繁的通、斷電所帶來(lái)的轉(zhuǎn)矩脈動(dòng)問(wèn)題一直難以解決，，所以開(kāi)關(guān)磁阻電機(jī)的建模方法和轉(zhuǎn)矩脈動(dòng)抑制技術(shù)更多的成為了重點(diǎn)研究對(duì)象。 本文首先介紹了開(kāi)關(guān)磁阻電機(jī)在數(shù)學(xué)建模方法、轉(zhuǎn)矩脈動(dòng)抑制技術(shù)、功率變換器結(jié)構(gòu)和控制器這幾方面的國(guó)內(nèi)外發(fā)展現(xiàn)狀，簡(jiǎn)單介紹了開(kāi)關(guān)磁阻電機(jī)調(diào)速系統(tǒng)的基本構(gòu)成。然后以12/8極、功率為3kW的開(kāi)關(guān)磁阻電機(jī)為研究對(duì)象，應(yīng)用Ansoft Maxwell軟件對(duì)開(kāi)關(guān)磁阻電機(jī)做二維有限元仿真計(jì)算，仿真計(jì)算得出其磁場(chǎng)分布和靜態(tài)磁鏈特性、電感特性和轉(zhuǎn)矩特性，用兩相通電模式下的靜態(tài)轉(zhuǎn)矩和一相通電下的靜態(tài)轉(zhuǎn)矩相對(duì)比，證明有提前開(kāi)通角加入下的兩相通電可以減小轉(zhuǎn)矩脈動(dòng)。基于實(shí)驗(yàn)測(cè)試的磁鏈數(shù)據(jù)，利用第一種磁鏈建模方案來(lái)得到三種特殊位置磁鏈函數(shù)，用得到的三種特殊位置的磁鏈函數(shù)結(jié)合傅里葉磁鏈建模方法來(lái)對(duì)電機(jī)進(jìn)行數(shù)學(xué)建模，得到的模型可以精確的表示電機(jī)的磁鏈特性,仿真證明建模方法是可行的。通過(guò)采取固定關(guān)斷角選取最優(yōu)開(kāi)通角來(lái)抑制轉(zhuǎn)矩脈動(dòng)，施加不同的開(kāi)通角進(jìn)行仿真對(duì)比，從仿真結(jié)果可以看出此方法是合理有效的。基于以上模型搭建實(shí)驗(yàn)平臺(tái)，對(duì)開(kāi)關(guān)磁阻電機(jī)調(diào)速系統(tǒng)進(jìn)行了硬件的設(shè)計(jì)。結(jié)合硬件編寫軟件程序，合理設(shè)計(jì)了軟件結(jié)構(gòu)，對(duì)各個(gè)軟件模塊做了具體分析。用實(shí)驗(yàn)波形和仿真波形做對(duì)比來(lái)驗(yàn)證抑制轉(zhuǎn)矩脈動(dòng)的控制策略是正確合理的，證明了本文的建模方法和轉(zhuǎn)矩脈動(dòng)抑制技術(shù)是可行的。
[Abstract]:Switched reluctance motor (SRM) has been widely used in the field of electric vehicles because of its simple structure, durable structure, low cost, flexible control, strong fault tolerance, high temperature resistance and good speed regulation performance. The problem of torque ripple caused by power failure is always difficult to solve, so the modeling method and torque ripple suppression technology of switched reluctance motor (SRM) have become more and more important research object. This paper first introduces the development of switched reluctance motor in mathematical modeling, torque ripple suppression technology, power converter structure and controller. The basic structure of switched reluctance motor (SRM) speed regulation system is introduced briefly. Then, the switched reluctance motor (SRM) with 12/8 pole and 3kW power is used as the research object, and the Ansoft Maxwell software is used to simulate the SRM by two-dimensional finite element method. The magnetic field distribution and static flux characteristics, inductance characteristics and torque characteristics are obtained by simulation. The static torque under two-phase electrification mode and the static torque under one-phase electrification mode are compared. It is proved that the torque ripple can be reduced by the two-phase electrification with the addition of the opening angle in advance. Based on the flux data of the experiment, three special position flux functions are obtained by using the first flux modeling scheme. The three special position flux function and Fourier flux modeling method are used to model the motor. The obtained model can accurately express the flux characteristics of the motor. The simulation results show that the modeling method is feasible. The torque ripple is suppressed by selecting the optimal turn-on angle with fixed turn-off angle, and different turn-on angles are applied for simulation and comparison. The simulation results show that this method is reasonable and effective. Based on the above model, the hardware design of switched reluctance motor speed regulation system is carried out. By comparing the experimental waveform with the simulation waveform, the control strategy of torque ripple suppression is correct and reasonable, which proves that the modeling method and the torque ripple suppression technique are feasible in this paper.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM352

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