开槽实心转子电机转子端部系数的计算与比较

发布时间：2019-05-08 01:56

【摘要】：开槽实心转子异步电机转子的三维非线性涡流场计算量大,常采用二维有限元结合光滑实心转子端部系数的方法简化计算。但在转差率增大时,采用光滑转子端部系数仿真计算的误差明显增大。根据开槽实心转子涡流分布随转差率变化的规律,提出适用于全转差率范围的开槽转子端部系数。依据该端部系数修正转子电阻率,并采用非线性有限元计算开槽实心转子电机电磁场,可考虑转子端部效应以及定、转子铁心磁路饱和的影响。在不同工况下,对两台不同转子槽数的开槽实心转子样机分别采用不同转子端部系数进行仿真计算,并与实验结果比较。该文提出的开槽转子端部系数的仿真与实验结果较吻合,且在转差率较大时,开槽转子端部系数随转子槽数增多而增大。可为准确计算开槽实心转子电机参数及其设计优化提供依据。
[Abstract]:The computation of three-dimensional nonlinear eddy current field of slotted solid rotor asynchronous motor rotor is large. The two-dimensional finite element method combined with smooth solid rotor end coefficient is often used to simplify the calculation. However, when the slip rate is increased, the error of simulation calculation with smooth rotor end coefficient increases obviously. According to the rule that the eddy current distribution of the slotted solid rotor varies with the slip rate, the end coefficient of the slotted rotor suitable for the range of the full slip rate is proposed. The rotor resistivity is modified according to the end coefficient, and the nonlinear finite element method is used to calculate the electromagnetic field of slotted solid rotor motor. The effect of rotor end effect and saturation of stator and rotor core magnetic circuit can be considered. Under different operating conditions, two slotted solid rotor prototypes with different rotor slots are simulated and calculated with different rotor end coefficients, and the results are compared with the experimental results. The simulation results of the slotted rotor end coefficient proposed in this paper are in good agreement with the experimental results, and when the slip rate is large, the slotted rotor end coefficient increases with the increase of the rotor slot number. It can provide the basis for accurately calculating the parameters of slotted solid rotor motor and its design optimization.
【作者单位】：电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);海军潜艇学院;
【基金】：国家自然科学基金项目(51177077) 国家科技支撑计划项目(2014BAA04B02)资助
【分类号】：TM343

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