非接觸感應電能傳輸系統(tǒng)中可分離變壓器磁場的有限元仿真分析

可分離變壓器是非接觸電能傳輸系統(tǒng)的重要組成之一，與傳統(tǒng)能量傳輸方式相比，它有很多優(yōu)點：供電設備和負載之間無任何接觸，無摩擦，易維護；無噪聲污染；能在多種惡劣的條件下工作等。本文利用ANSYS 軟件，分析了可分離變壓器各種可能會影響傳輸效率的因素，并為實際系統(tǒng)選擇模型提供了參考依據(jù)。本文利用ANSYS 軟件建立了可分離變壓器的二維和三維模型進行仿真。二維分析不考慮變壓器結(jié)構(gòu)的影響，把一些外部條件作為變量建立模型，例如原邊電流頻率，幅值，線圈繞制方法，原、副邊距離等因素。在二維的基礎上做了的優(yōu)化分析，目的是從優(yōu)化的角度得到一些選擇磁芯的趨勢。三維分析的目的是從所有可用的開關電源變壓器中找出最優(yōu)的結(jié)構(gòu)，最優(yōu)包括傳輸效率最高以及對周圍環(huán)境的電磁干擾最小。不同的結(jié)構(gòu)有不同的應用場合和特點。為了具有對比性，分析中以PM 型磁芯為基礎選擇不同結(jié)構(gòu)并建模，從仿真的角度給出了在何種條件下可以得到最高的傳輸效率。
關鍵詞：非接觸感應電能傳輸，可分離變壓器，有限元
Abstract：Detachable transformer is an important component of contactless power transmission system. Compared with traditional
transmission modes, it has following advantages. There is no contact between supplying equipments and loads, no friction, which brings
convenience to maintenance; no noise pollution et al. It can work in any formidable conditions with higher frequency and less volume. This
paper discusses various factors that may have influence on transmission efficiency by ANSYS and offers several guidelines to realize
systems. This paper sets up two-dimensional and three-dimensional models of dissociable transformer by ANSYS. 2-D analysis takes no
consideration of the influence by transformer structure, and only set parameters by external conditions, including frequency and amplitude
of primary current, the way of coiling and the distance between primary magnetic core and secondary one. Optimization of 2-D analysis is
also made to get the tendency for choosing magnetic core. The object of 3-D analysis is to find out the optimum structure with highest
transmission efficiency and smallest electromagnetic interference from all the switch-mode power supplies. Different structures suit on different application conditions and have their own features. For the sake of comparison, the analysis chooses PM-cores, and models in different structures. This paper discusses conditions on which the highest efficiency can be acquired through emulation to eliminate bad influence to the whole system by this link.
Keywords: Contactless power transmission system, Detachable transformer, , FEM