【摘要】：針對兆瓦級高速永磁電機的損耗密度大、散熱困難、永磁體在高溫情況下易發(fā)生不可逆退磁的問題,提出了一種徑向與軸向混合的⊥型通風系統(tǒng),通過流體仿真軟件Fluent建立了該種通風系統(tǒng)的3D流體場計算模型,并詳細分析了通風系統(tǒng)內(nèi)的流體分布;同時針對高速電機轉(zhuǎn)子表面線速度高(一般可達200 m/s)、轉(zhuǎn)子表面的風摩耗較大且計算復雜的問題,基于所建立的3D流體場模型和解析法,對兆瓦級高速永磁電機的轉(zhuǎn)子轉(zhuǎn)速、轉(zhuǎn)子表面粗糙度及通風量、風道幾何參數(shù)、氣隙大小對轉(zhuǎn)子表面風摩耗的影響進行了研究計算,并總結(jié)了相應的規(guī)律。分析結(jié)果表明,所設計的混合⊥型通風系統(tǒng)具有較好的湍流特性和散熱特性,轉(zhuǎn)子轉(zhuǎn)速和氣隙大小是影響風摩耗的主要因素。
[Abstract]:Aiming at the problems of high loss density and difficult heat dissipation of megawatt high speed permanent magnet motor and the irreversible demagnetization of permanent magnet at high temperature, a radial and axial mixing ventilation system is proposed. The 3D fluid field calculation model of the ventilation system is established by the fluid simulation software fluent, and the fluid distribution in the ventilation system is analyzed in detail. At the same time, aiming at the problem of high linear speed on the rotor surface of high-speed motor (generally up to 200 m / s), the wind friction on the rotor surface is large and the calculation is complicated, based on the 3D fluid field model and analytical method, the rotor speed of the megawatt high speed permanent magnet motor is studied. The effects of rotor surface roughness and ventilation volume, air duct geometry parameters and air gap size on wind friction on rotor surface are studied and calculated, and the corresponding rules are summarized. The results of analysis show that the designed hybrid 螕 type ventilation system has better turbulence and heat dissipation characteristics, and rotor speed and air gap size are the main factors affecting wind friction.
【作者單位】： 沈陽工業(yè)大學電氣工程學院;沈陽工程學院機械學院;貝爾法斯特女王大學電氣工程系;
【基金】：長江學者和創(chuàng)新團隊發(fā)展計劃資助項目(IRT1072) 國家自然科學基金(51207094) 遼寧省高校創(chuàng)新團隊支持計劃資助項目(LT2011003)
【分類號】：TM351

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