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  本文選題：永磁偏置磁懸浮軸承 + 耦合分析��； 參考：《沈陽工業(yè)大學(xué)》2011年碩士論文

【摘要】：磁懸浮軸承(Magnetic Bearing)是利用磁力作用將轉(zhuǎn)子懸浮于空中,使轉(zhuǎn)子與定子之間沒有機械接觸。永磁偏置磁懸浮軸承作為磁懸浮軸承的一種,已經(jīng)成為各國專家學(xué)者爭相研究的熱點。與主動式磁懸浮軸承相比,用永磁磁通來代替電勵磁磁通作為偏置磁通,減小了控制繞組中的電流,減少了功率器件個數(shù)和散熱面積,降低了損耗,提高了效率。 本文研究了一種永磁偏置磁懸浮軸承的結(jié)構(gòu)。介紹其工作原理,推導(dǎo)了整個永磁偏置磁懸浮軸承的等效磁路,并對磁路中的電磁參數(shù)進(jìn)行了計算。根據(jù)電磁參數(shù)的計算結(jié)果設(shè)計了永磁偏置磁懸浮軸承的具體尺寸,并對各部分的材料進(jìn)行了選擇,給出了樣機的具體模型。推導(dǎo)了永磁偏置磁懸浮軸承的數(shù)學(xué)模型,根據(jù)等效磁路理論,結(jié)合數(shù)學(xué)模型用Matlab/Simulink軟件構(gòu)建磁懸浮軸承的仿真模型,仿真所得數(shù)據(jù)與計算數(shù)據(jù)相吻合,驗證了仿真模型的正確性,并用此模型對電磁力之間的耦合進(jìn)行了分析,為控制系統(tǒng)的設(shè)計奠定基礎(chǔ)。 用電渦流式位置傳感器對轉(zhuǎn)子位置進(jìn)行測量。介紹了電渦流傳感器的原理,并設(shè)計了電渦流式位置傳感器對轉(zhuǎn)子位置檢測的結(jié)構(gòu)示意圖,闡述其測量的工作原理,安裝過程,給出了電渦流傳感器對轉(zhuǎn)子位置檢測的電路圖以及整個永磁偏置磁懸浮軸承的安裝示意圖。 采用全橋式電路作為控制繞組的基本形式,并用混合型功率放大器作為永磁偏置磁懸浮軸承的功率執(zhí)行器件。用Multisim10.0軟件對混合型功率放大器的性能進(jìn)行仿真。仿真結(jié)果表明,混合型功率放大器對階躍信號和正弦信號有很好的跟隨特性,滿足磁懸浮軸承對功率放大器的要求。
[Abstract]:Magnetic bearing suspends the rotor in the air by magnetic force so that there is no mechanical contact between the rotor and the stator. As a kind of magnetic bearing, the permanent magnet bias magnetic bearing has become a hot spot of experts and scholars all over the world. Compared with active maglev bearing, permanent magnetic flux is used instead of electrically excited flux as bias flux, which reduces the current in control winding, reduces the number of power devices and heat dissipation area, reduces the loss and improves the efficiency. In this paper, the structure of a permanent magnet bias magnetic bearing is studied. Its working principle is introduced, the equivalent magnetic circuit of the whole permanent magnet bias magnetic suspension bearing is deduced, and the electromagnetic parameters in the magnetic circuit are calculated. According to the calculation results of electromagnetic parameters, the size of permanent magnet bias magnetic bearing is designed, and the material of each part is selected, and the concrete model of the prototype is given. The mathematical model of permanent magnet bias magnetic bearing is deduced. According to the theory of equivalent magnetic circuit, the simulation model of magnetic suspension bearing is constructed by using Matlab / Simulink software. The simulation data agree with the calculated data, and the correctness of the simulation model is verified. The coupling between electromagnetic forces is analyzed by this model, which lays a foundation for the design of control system. The rotor position is measured by eddy current position sensor. The principle of eddy current sensor is introduced, and the structure diagram of eddy current position sensor for rotor position detection is designed. The working principle and installation process of eddy current sensor are described. The circuit diagram of rotor position detection by eddy current sensor and the installation diagram of the permanent magnet bias magnetic suspension bearing are given. The full-bridge circuit is used as the basic form of control winding and the hybrid power amplifier is used as the power executive device of permanent magnet bias magnetic bearing. The performance of hybrid power amplifier is simulated with Multisim10.0 software. The simulation results show that the hybrid power amplifier can follow the step signal and sinusoidal signal well and meet the requirements of the magnetic bearing for the power amplifier.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH133.3

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 梁德志;永磁偏置磁懸浮軸承的結(jié)構(gòu)設(shè)計及其控制器研究[D];廣東工業(yè)大學(xué);2015年

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本文編號：2075002