本文選題：磁懸浮軸承 + 電渦流��； 參考：《南京理工大學(xué)》2011年碩士論文

【摘要】：擁有無摩擦、無磨損、無需潤滑、低功耗,無噪聲等優(yōu)點的磁懸浮軸承在如今飛速發(fā)展的今天,其應(yīng)用與需求是越來越廣。磁懸浮軸承必須根據(jù)軸的懸浮狀態(tài)不斷地調(diào)節(jié)磁場力的大小才能使軸實現(xiàn)穩(wěn)定地懸浮,其關(guān)鍵技術(shù)之一就是對轉(zhuǎn)子位移的實時檢測。本文研究用以軸向磁懸浮軸承控制系統(tǒng)系統(tǒng)的位移檢測技術(shù),根據(jù)系統(tǒng)的研制要求,主要對電渦流,電感,電容三種常用的位移檢測方法進行了比較研究。 在分析比較了各種電渦流檢測電路原理的基礎(chǔ)上,設(shè)計了調(diào)幅式的位移檢測電路,對激勵信號的頻率、波形進行了實驗分析研究,從提高位移檢測靈敏度的角度考慮,確定了激勵信號的頻率和波形。 設(shè)計了差動電容式位移檢測系統(tǒng)。采取印制板技術(shù)制作電容極板,并將檢測電路與電極做成一體,直接將位移變化導(dǎo)致的電容變化轉(zhuǎn)變?yōu)殡娦盘栞敵?大大減少了分布電容的干擾,并在結(jié)構(gòu)上采取了屏蔽措施,克服了外界電磁干擾的影響,使系統(tǒng)檢測的可靠性大大提高,并具有比較高的位移檢測靈敏度。 將電渦流和差動電容位移傳感器應(yīng)用于軸向磁懸浮軸承,進行實際的使用對比實驗。根據(jù)實際效果,從安裝的方便性考慮,電渦流傳感器體積小,易于安裝,而電容傳感器體積偏大；從靈敏度考慮,差動電容傳感器靈敏度高于電渦流傳感器；從經(jīng)濟性考慮,電容位移檢測系統(tǒng)較電渦流位移檢測系統(tǒng)的成本低。就軸向磁懸浮軸承的位移檢測的運用,差動電容較電渦流位移檢測技術(shù)更為合適。
[Abstract]:With the advantages of no friction, no wear, no lubrication, low power consumption, no noise and so on, the application and demand of maglev bearing are more and more extensive.The magnetic bearing must constantly adjust the magnitude of magnetic field force according to the suspension state of the shaft in order to realize the stable suspension of the shaft. One of the key technologies is to detect the rotor displacement in real time.In this paper, the displacement detection technology of the control system of axial magnetic bearing is studied. According to the development requirements of the system, three commonly used displacement detection methods, eddy current, inductance and capacitance, are compared and studied.Based on the analysis and comparison of the principles of various eddy current detection circuits, an amplitude modulated displacement detection circuit is designed. The frequency and waveform of the excitation signal are experimentally analyzed and studied, and the sensitivity of displacement detection is considered from the point of view of improving the sensitivity of displacement detection.The frequency and waveform of the excitation signal are determined.A differential capacitance displacement detection system is designed.The PCB technology is adopted to make the capacitor electrode, and the detection circuit and the electrode are made into an integral whole. The capacitance change caused by the displacement change is transformed directly into the electrical signal output, which greatly reduces the interference of the distributed capacitance, and the shielding measures are taken in the structure.By overcoming the influence of external electromagnetic interference, the reliability of the system is greatly improved, and the sensitivity of displacement detection is relatively high.The eddy current and differential capacitance displacement sensor are applied to the axial magnetic bearing.According to the practical effect, considering the convenience of installation, the eddy current sensor is small in size and easy to install, while the capacitance sensor is larger in volume; considering the sensitivity, the sensitivity of differential capacitance sensor is higher than that of eddy current sensor, and considering the economy, the sensitivity of differential capacitance sensor is higher than that of eddy current sensor.The cost of capacitance displacement detection system is lower than that of eddy current displacement detection system.The differential capacitance is more suitable than the eddy current displacement detection technology for the displacement detection of axial magnetic bearing.
【學(xué)位授予單位】：南京理工大學(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】

相關(guān)碩士學(xué)位論文 前1條

1 張鑫;光纖電流互感器中信號檢測與處理[D];山東大學(xué);2012年

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本文編號：1752749