本文關(guān)鍵詞： 變頻供電 感應(yīng)電機(jī) 鐵耗 諧波磁場(chǎng)　出處：《中國(guó)電機(jī)工程學(xué)報(bào)》2016年08期 　論文類(lèi)型：期刊論文

【摘要】：變頻供電條件下電源諧波與電機(jī)內(nèi)部諧波共同作用下?lián)p耗產(chǎn)生機(jī)理及分布特點(diǎn)更為復(fù)雜,使得電機(jī)鐵耗準(zhǔn)確計(jì)算及精細(xì)化分析對(duì)于高效變頻電機(jī)設(shè)計(jì)至關(guān)重要。以一臺(tái)5.5 k W變頻感應(yīng)電機(jī)為例,分析了變頻供電時(shí)電機(jī)定轉(zhuǎn)子主要位置磁密變化情況;為了準(zhǔn)確計(jì)算鐵耗,提出一種損耗系數(shù)隨磁密幅值和頻率變化的兩項(xiàng)式分段變系數(shù)鐵耗模型,該模型在經(jīng)典兩項(xiàng)式常系數(shù)鐵耗模型基礎(chǔ)上引入兩個(gè)附加磁密項(xiàng),用于考慮非線(xiàn)性特性及諧波磁場(chǎng)對(duì)磁滯和渦流損耗的影響;進(jìn)一步利用該模型對(duì)變頻供電時(shí)電機(jī)鐵耗進(jìn)行了精細(xì)化分析,揭示了定轉(zhuǎn)子鐵心磁滯和渦流損耗的分布規(guī)律,并獲得了諧波磁場(chǎng)在定轉(zhuǎn)子鐵心產(chǎn)生附加鐵耗的變化特點(diǎn)。通過(guò)對(duì)不同電壓及開(kāi)關(guān)頻率下的空載鐵耗進(jìn)行實(shí)測(cè)對(duì)比,驗(yàn)證了文中模型及分析結(jié)果正確性。文中研究成果可為高效變頻電機(jī)設(shè)計(jì)提供重要理論支撐。
[Abstract]:Under the condition of frequency conversion power supply, the loss generation mechanism and distribution characteristics are more complicated under the joint action of power harmonic and internal harmonic of motor. It is very important for the design of high efficiency frequency conversion motor to calculate and analyze the iron loss accurately. Taking a 5.5 kW variable-frequency induction motor as an example, the variation of magnetic density in the main position of stator and rotor is analyzed. In order to calculate iron loss accurately, a two-term variable coefficient iron loss model with the variation of magnetic density amplitude and frequency is proposed. Two additional magnetic density terms are introduced into the model based on the classical two-term constant coefficient iron loss model. It is used to consider the nonlinear characteristics and the influence of harmonic magnetic field on hysteresis and eddy current loss, and the distribution of hysteresis and eddy current loss of stator and rotor iron core is revealed by using this model. The characteristics of the harmonic magnetic field producing additional iron loss in the stator and rotor core are obtained. The measured results of the no-load iron loss at different voltages and switching frequencies are compared. The correctness of the model and the analysis results are verified, and the research results can provide important theoretical support for the design of high efficiency frequency conversion motor.
【作者單位】： 新能源電力系統(tǒng)國(guó)家重點(diǎn)實(shí)驗(yàn)室(華北電力大學(xué));
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51307050) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金資助(2015ZD03)~~
【分類(lèi)號(hào)】：TM346

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本文編號(hào)：1500312