本文關(guān)鍵詞：電磁機構(gòu)中非線性永磁體分布參數(shù)模型的研究　出處：《福州大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 永磁接觸器 永磁分塊 磁路模型 靜態(tài)吸力 動態(tài)吸力

【摘要】：永磁機構(gòu)不僅能夠?qū)崿F(xiàn)傳統(tǒng)電磁機構(gòu)的全部功能,還具有高可靠、高節(jié)能、抗晃電以及無溫升等諸多優(yōu)點,因而得到了越來越多的普及。電磁機構(gòu)能夠穩(wěn)定可靠的工作,關(guān)鍵在于吸力與反力特性的配合。目前,基于傳統(tǒng)的永磁集總參數(shù)模型構(gòu)造系統(tǒng)等效磁路的方法,求解電磁機構(gòu)吸力特性的精度還比較低。針對永磁集總參數(shù)等效磁路模型存在的吸力求解精度較低的問題,本文通過Ansoft軟件對電磁機構(gòu)永磁體磁場分布進行仿真分析,結(jié)果表明由于存在漏磁效應(yīng)和端面氣隙擴散磁通,使得永磁體內(nèi)部磁感應(yīng)強度分布并不均勻。為了提高電磁吸力的求解精度,提出了根據(jù)永磁體內(nèi)磁場疏密不同的分布,對永磁體沿磁化方向和垂直于磁化方向進行分塊的永磁體分布參數(shù)模型,并通過永磁接觸器實例進行分析計算并得到其靜態(tài)吸力值。將永磁體分布參數(shù)模型靜態(tài)吸力特性計算值與永磁體集總參數(shù)模型的計算值、有限元仿真值以及實測值進行對比分析,表明采用永磁體分塊的分布參數(shù)磁路模型可以獲得較高的計算精度。在靜態(tài)吸力特性求解的基礎(chǔ)上,本文提出根據(jù)不同勵磁電流情況獲得的動鐵心靜態(tài)吸力曲線簇以及仿真得到的靜態(tài)線圈磁鏈曲線簇,結(jié)合永磁接觸器動態(tài)微分方程組,求解永磁接觸器動鐵心的動態(tài)特性。該方法獲得的動鐵心位移動態(tài)數(shù)據(jù)與以高速攝像機為核心的電磁機構(gòu)動態(tài)檢測平臺測量得到的動鐵心位移動態(tài)數(shù)據(jù)相比,具有較高的一致性和求解精度,驗證了所提出永磁體分布參數(shù)模型在求解永磁機構(gòu)動態(tài)過程時的有效性和合理性。對動鐵心位移-時間曲線做進一步的數(shù)據(jù)處理,繼而又可得到永磁接觸器的動態(tài)吸力特性。電磁機構(gòu)中只有動態(tài)吸力特性才是吸反力特性配合的真實過程。研究表明,基于永磁分布參數(shù)模型在計算動鐵心靜態(tài)吸力和動態(tài)吸力方面可以獲得較高的計算精度,且具有建模方便、參數(shù)易修改、計算快速等優(yōu)點,本文的研究成果為永磁機構(gòu)設(shè)計和優(yōu)化分析提供了一種有效的方法。
[Abstract]:Permanent magnet mechanism not only can realize all functions of the traditional electromagnetic mechanism, also has high reliability, high energy efficiency, the advantages of anti-interference electricity and no temperature rise, which has been more and more popular. The electromagnetic mechanism can work stably and reliably, the key lies in the coordination and reaction characteristics of suction. At present, the traditional method of permanent magnet the lumped parameter model is constructed based on the equivalent magnetic circuit system, suction characteristic of solving the electromagnetic mechanism accuracy is relatively low. The accuracy of permanent magnet suction lumped parameter equivalent circuit model has the problem of low, through the Ansoft software of the electromagnetic mechanism of permanent magnet magnetic field distribution simulation analysis. The results show that due to the existence of magnetic flux leakage effect and end the air gap flux of the permanent magnet inside the magnetic flux density distribution is not uniform. In order to improve the accuracy of electromagnetic force, put forward according to the permanent magnet in the magnetic field density The different distribution of the permanent magnet magnetization direction along and perpendicular to the direction of magnetization of the permanent magnet block distribution parameter model, and through the permanent magnet contactor was analyzed and calculated to get the static value. The permanent magnet distribution static characteristic parameters of model calculation of model parameters and the permanent magnet set value, Co. element simulation value and measured value were analyzed, show that the distributed parameter model of a permanent magnet magnetic circuit block can get higher accuracy. Based on the static characteristic is obtained, according to the different excitation current static coil flux linkage curves obtained static force curves and core simulation is presented in this paper, combined with the permanent magnetic contactor dynamic differential equations, the dynamic characteristics of permanent magnet contactor core solution. The method of obtaining the dynamic iron core displacement dynamic data with high speed camera Electromagnetic mechanism dynamic detection platform measuring machine as the core of the dynamic core displacement dynamic data compared with high consistency and accuracy, verify that the proposed distributed parameter model of permanent magnet permanent magnet mechanism in solving the dynamic process is effective and reasonable. Further data processing of moving iron heart displacement time curve then, get dynamic suction characteristic of permanent magnet contactor electromagnetic mechanism. Only dynamic force characteristic is the real process with the suction force characteristic of permanent magnet. The results show that the distributed parameter model in the calculation of dynamic state and dynamic suction suction iron Manila can get higher accuracy based, and has convenient modeling, parameter easy to modify, fast calculation, the results of this research provide an effective method for the design and optimization of the permanent magnetic mechanism.

【學(xué)位授予單位】：福州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM572

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