【摘要】：以400 W試驗樣機在額定風(fēng)速下不同尖速比對應(yīng)的實際輸出電流作為激勵,對電機溝槽采用棱邊有限元法(EFEM)由矢量插值函數(shù)直接求解三維瞬態(tài)及諧態(tài)磁場矢量,保證磁場矢量在單元交界處應(yīng)有的切向連續(xù),分別計算32槽8極電機梨形槽、斜肩圓底槽及扇形槽的不同定子結(jié)構(gòu)磁場強度和渦流損耗;通過物理場文件轉(zhuǎn)移載荷法將電磁場計算結(jié)果作為溫度場載荷進行轉(zhuǎn)移的間接耦合方式,迭代計算后讀取結(jié)果文件獲得磁通密度、磁場強度矢量及熱流密度分布。分析表明EFEM計算電機溝槽電磁特性及傳熱特性有較高的準(zhǔn)確性和有效性,且渦流損耗產(chǎn)生的焦耳熱引起的溫度梯度較大,使得磁場的強度和方向均發(fā)生改變。
[Abstract]:Taking the actual output current corresponding to different sharp speed ratios at rated wind speed as excitation, the finite element method (EFEM) with edge is used to solve the three-dimensional transient and harmonic magnetic field vectors directly from vector interpolation function in the grooves of the motor. To ensure the tangential continuity of the magnetic field vector at the junction of the unit, the magnetic field intensity and eddy current loss of different stator structures of 32-slot 8-pole motor, 12-pole 8-pole motor, 3-pole groove with inclined shoulder and fan groove are calculated respectively. Through the physical field file transfer load method, the electromagnetic field calculation results are regarded as indirect coupling mode of temperature field load transfer. After iterative calculation, the magnetic flux density, magnetic field intensity vector and heat flux density distribution are obtained by reading the result file. The analysis shows that EFEM has high accuracy and effectiveness in calculating the electromagnetic and heat transfer characteristics of motor grooves, and the temperature gradient caused by Joule heat caused by eddy current loss is larger, which changes the intensity and direction of magnetic field.
【作者單位】： 內(nèi)蒙古工業(yè)大學(xué)能源與動力工程學(xué)院;風(fēng)能太陽能利用技術(shù)省部共建教育部重點實驗室;
【基金】：國家自然科學(xué)基金(50976047) 內(nèi)蒙古自治區(qū)自然科學(xué)基金重大項目(2012ZD08)
【分類號】：TM315

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