本文關(guān)鍵詞：高穩(wěn)定性磁懸浮軸承電控系統(tǒng)研究　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 磁懸浮軸承 差動(dòng)位移檢測(cè)電路 PID控制電路 功率放大電路 參數(shù)整定

【摘要】：通過對(duì)自然界磁現(xiàn)象的長(zhǎng)時(shí)間地研究與積累,人們可以對(duì)磁場(chǎng)進(jìn)行精確控制并加以利用,磁懸浮軸承就是其中典型的代表。相比于傳統(tǒng)機(jī)械軸承,利用電磁力實(shí)現(xiàn)轉(zhuǎn)子無接觸支撐的磁懸浮軸承在應(yīng)用方面具有無損耗、無需潤(rùn)滑等優(yōu)勢(shì),因此磁懸浮軸承在工業(yè)應(yīng)用中具有巨大潛力。作為磁懸浮軸承的核心,電控系統(tǒng)一直是研究的重點(diǎn)與難點(diǎn),本文主要研究了主動(dòng)式磁懸浮軸承系統(tǒng)的電控系統(tǒng)包括位移檢測(cè)與控制系統(tǒng)。本文首先根據(jù)磁懸浮軸承位移檢測(cè)的特點(diǎn)分析了位移檢測(cè)的要求,選擇了電渦流式位移傳感器,并根據(jù)電渦流位移傳感器的原理設(shè)計(jì)了差動(dòng)位移檢測(cè)電路,然后對(duì)檢測(cè)電路的主要指標(biāo)做了實(shí)驗(yàn)與理論分析,結(jié)果表明檢測(cè)電路在靈敏度、穩(wěn)定性與動(dòng)態(tài)特性方面均滿足要求。接著對(duì)控制系統(tǒng)進(jìn)行了分析并設(shè)計(jì)包括PID控制電路與功率放大電路,研究了功率放大電路主要參數(shù)直流母線電壓與開關(guān)頻率的大小對(duì)整個(gè)系統(tǒng)性能的影響,然后對(duì)所設(shè)計(jì)的控制系統(tǒng)進(jìn)行建模,通過實(shí)驗(yàn)與對(duì)系統(tǒng)閉環(huán)傳遞函數(shù)的分析給出了 PID參數(shù)整定的方法使得轉(zhuǎn)子可以穩(wěn)定懸浮,通過Matlab仿真了解PID參數(shù)對(duì)控制性能的影響,最后通過實(shí)驗(yàn)驗(yàn)證了磁懸浮軸承的穩(wěn)定性與抗干擾能力可以取得令人滿意的效果。
[Abstract]:By studying and accumulating the magnetic phenomena in nature for a long time, people can accurately control the magnetic field and use it. The magnetic bearing is a typical example, compared with the traditional mechanical bearing. Using electromagnetic force to realize the rotor without contact support magnetic bearing has the advantages of no loss and no lubrication in application, so magnetic suspension bearing has great potential in industrial application. It is the core of magnetic suspension bearing. Electronic control system has been the focus and difficulty of the research. This paper mainly studies the electronic control system of active magnetic bearing system, including displacement detection and control system. Firstly, according to the characteristics of magnetic suspension bearing displacement detection, the requirements of displacement detection are analyzed. The electric eddy current displacement sensor is selected and the differential displacement detection circuit is designed according to the principle of the eddy current displacement sensor. The results show that the detection circuit meets the requirements in sensitivity, stability and dynamic characteristics. Then, the control system is analyzed and designed, including PID control circuit and power amplifier circuit. The effect of DC bus voltage and switching frequency on the system performance is studied, and the control system is modeled. Through the experiments and the analysis of the closed-loop transfer function of the system, the method of PID parameter tuning is given to make the rotor suspension stably. The influence of PID parameters on the control performance is studied by Matlab simulation. Finally, the stability and anti-interference ability of maglev bearing are verified by experiments.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH133.3;TP273

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