發(fā)布時(shí)間：2019-04-25 13:02

【摘要】：羅氏線圈作為新型的電流互感器,具有與測量回路電氣絕緣,測量頻率寬,反應(yīng)靈敏,體積小巧,測量精度高等優(yōu)點(diǎn)被廣泛應(yīng)用在電氣測量領(lǐng)域。本論文根據(jù)羅氏線圈制造企業(yè)提出的導(dǎo)致羅氏線圈質(zhì)量,影響其產(chǎn)業(yè)化進(jìn)程的若干問題開展研究。本論文首先研究了羅氏線圈電流互感器國內(nèi)外發(fā)展?fàn)顩r,以及其測量原理及特點(diǎn)。從理論上分析羅氏線圈的工作特性,等效電路,工作狀態(tài),以及頻率特性。本論文詳細(xì)分析新型羅氏線圈：PCB羅氏線圈,對其原理,設(shè)計(jì)以及工藝進(jìn)行研究。本論文主要分析了導(dǎo)致羅氏線圈產(chǎn)生誤差的電磁干擾、溫度變化、被測導(dǎo)線位置偏離線圈中心等因素。通過理論分析電磁干擾對羅氏線圈的影響,給出進(jìn)行電磁屏蔽以消除的電磁干擾的方法；對溫度變化以及被測導(dǎo)線位置偏離線圈中心的情況同樣進(jìn)行了同樣理論分析,并使用Ansoft軟件仿真,結(jié)合能量攝動(dòng)法,計(jì)算羅氏線圈互感系數(shù)受上述兩種因素的影響狀況。將理論分析與仿真結(jié)果進(jìn)行對照,給出減少誤差影響的方法。對于溫度的影響,互感系數(shù)的變化與溫度變化成正比,減小溫度的影響在于選取熱膨脹系數(shù)小的骨架材料。對于被測導(dǎo)線位置的偏離,隨著被測導(dǎo)線偏離線圈中心,互感系數(shù)逐漸減小,需要保持被測導(dǎo)線處于線圈的中心位置以減少誤差。論文最后對全文總結(jié)和展望,并分析了工作的不足與進(jìn)一步研究的方向。
[Abstract]:As a new type of current transformer, Roche coil has been widely used in the field of electrical measurement with the advantages of electrical insulation from the measuring loop, wide measurement frequency, sensitive response, small size and high measurement precision. In this paper, several problems which lead to the quality of Roche coil and influence its industrialization process are studied according to the Roche coil manufacturing enterprise. Firstly, this paper studies the development of Roche coil current transformer at home and abroad, as well as its measuring principle and characteristics. The working characteristic, equivalent circuit, working state and frequency characteristic of Roche coil are analyzed theoretically. In this paper, the principle, design and process of the new Roche coil, PCB coil, are analyzed in detail. In this paper, the electromagnetic interference (EMI), temperature variation and the deviation of the measured conductor from the center of the coil are analyzed. The influence of electromagnetic interference on Roche coil is analyzed theoretically, and the method to eliminate electromagnetic interference by electromagnetic shielding is given. The same theoretical analysis of the temperature variation and the deviation of the measured conductor from the center of the coil is also carried out. With the help of the Ansoft software and the energy perturbation method, the mutual inductance coefficient of the Roche coil is calculated to be affected by the two factors mentioned above. The theoretical analysis is compared with the simulation results, and the method to reduce the error effect is given. For the influence of temperature, the change of mutual inductance coefficient is proportional to the change of temperature, and the effect of decreasing temperature is to select the skeleton material with small thermal expansion coefficient. For the deviation of the measured conductor, as the measured wire deviates from the center of the coil, the mutual inductance decreases gradually, so it is necessary to keep the measured wire at the center of the coil to reduce the error. Finally, the paper summarizes and looks forward to the full text, and analyzes the shortcomings of the work and the direction of further research.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM452

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