兆瓦级高速永磁电机通风系统设计与转子表面风摩耗研究

发布时间：2018-07-13 08:47

【摘要】：针对兆瓦级高速永磁电机的损耗密度大、散热困难、永磁体在高温情况下易发生不可逆退磁的问题,提出了一种径向与轴向混合的⊥型通风系统,通过流体仿真软件Fluent建立了该种通风系统的3D流体场计算模型,并详细分析了通风系统内的流体分布;同时针对高速电机转子表面线速度高(一般可达200 m/s)、转子表面的风摩耗较大且计算复杂的问题,基于所建立的3D流体场模型和解析法,对兆瓦级高速永磁电机的转子转速、转子表面粗糙度及通风量、风道几何参数、气隙大小对转子表面风摩耗的影响进行了研究计算,并总结了相应的规律。分析结果表明,所设计的混合⊥型通风系统具有较好的湍流特性和散热特性,转子转速和气隙大小是影响风摩耗的主要因素。
[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.
【作者单位】：沈阳工业大学电气工程学院;沈阳工程学院机械学院;贝尔法斯特女王大学电气工程系;
【基金】：长江学者和创新团队发展计划资助项目(IRT1072) 国家自然科学基金(51207094) 辽宁省高校创新团队支持计划资助项目(LT2011003)
【分类号】：TM351

【参考文献】