magnetic double layer 中文意思是什麼
magnetic double layer
解釋
雙磁層-
Linear induction motor is an important kind of machines which have some merits such as simple structure, low cost, durability, convenience for maintenance etc. the subject of this thesis is to study a big circular ring linear induction motor, and the major works in this thesis are summarized as follows : ( 1 ) considering the effects of the finite length of primary core, one - dimension analytical solution for the air gap field is cited in this paper. based on it, the single layer winding magnetic field is studied. considering whole - pitched and short - pitched winding configuration with odd poles and half - fulled slots in both ends, the double - layer winding magnetic field is analyzed, respectively
本文對大圓環直線感應電機進行了深入細致研究，內容包括： （ 1 ）本文採用有限長行波面電流作用於有限長鐵芯上的模型，引用了氣隙磁場一維解，研究了單層繞組磁場，奇數極半填槽雙層繞組在採用整距和短距時磁場的分析、比較，簡單介紹了二維解； （ 2 ）用有限元軟體ansoft對大圓環直線感應電機空載氣隙磁場進行了靜態分析，並分析了結果； （ 3 ）用軟體進行了額定電壓下的瞬態分析，得到了轉矩，位移，轉速隨時間變化曲線圖，利用單極性霍爾元件測定轉速並與軟體計算結果進行了比較，採用等效電路法計算了堵轉時的最大電磁力並做實驗進行了驗證，由實驗測得了三相電流波形，並與計算結果進行了比較，對其不對稱性進行了定性分析。 -
The experiments showed us : firstly, mediums with different magnetic and dielectric properties had different influence on the microwave - absorbing properties of spinel ferrite ; secondly, magnetic texture treatment greatly affected the microwave - absorbing properties of the spinel ferrite - based mixed material which contained single - domain particles of hexagonal ferrite, changing the matching thickness, the density of area and the position of absorption peaks and increasing the absorption quantity and the 10db bandwidth ; thirdly, the coupling effect between different layers affected the microwave - absorbing properties of the double - layer spinel ferrite - based mixed material, decreasing its matching thickness and density of area and increasing the position of absorption peaks
實驗發現： （ 1 ）不同磁性與電性的介質對尖晶石型鐵氧體吸波特性的影響不同； （ 2 ）磁織構化處理對含有六角晶系鐵氧體單疇顆粒的尖晶石型鐵氧體基混合吸波材料的性能影響很大，可以改變匹配厚度、面密度與吸收峰峰位，提高吸收量與10db帶寬； （ 3 ）對于雙層材料，層間耦合作用會影響其吸波性能，降低匹配厚度與面密度，提高吸收峰峰位。 -
In addition, we also studied the influence of magnetic texture treatment, double - layer structure and medium film on the spinel ferrite - based mixed material
同時，初步研究了磁織構化處理、雙層結構及介質膜對尖晶石型鐵氧體基混合吸波材料性能的影響。 -
A reflective polarizer based on a double - layer subwavelength metal - dielectric grating structure is presented here. numerical simulations show that at normal incidence, this polarizer reflects light polarized perpendicular to the grating lines ( transverse magnetic polarization ), but strongly absorbs parallel - polarized light ( transverse electric polarization ). the polarization extinction ratio is very high
理論計算表明，零角度入射時，該光柵結構在可見波段對tm波有很高的反射率，而對te波強烈吸收，即可獲得很高的反射光偏振比，可以作為理想的集成偏振器件。 -
It is shown that good performance on millimeter - wave and centimeter - wave can be achieved respectively by electric loss and magnetic loss, then through improving the impedance matching between layers compatible absorbability will be obtained on the whole by double - layer structure letting the centimeter - wave absorbing layer be the inner layer and the millimeter - wave absorbing layer the outer layer
理論分析和實驗結果表明，先分別以電損耗和磁損耗為主，採用單層結構分別對毫米波和厘米波實現較好的吸收，然後以厘米波吸收層作為內層，以毫米波吸收層作為外層，並進一步改善內外層之間的阻抗匹配，利用兩層結構可以對毫米波和厘米波實現較好的兼容吸收。
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