偏斜转子槽形感应电机正反转性能差异的研究  

Research on Forward and Reverse Performance Difference of Induction Machine with Inclined Rotor Slot Shape

作　　者：徐威 宁银行[1] 蔡迎龙 戴耀徵 黄淳艺 XU Wei;NING Yinhang;CAI Yinglong;DAI Yaozheng;HUANG Chunyi(School of Electrical Engineering,Shanghai Dianji University,Shanghai 201306)

机构地区：[1]上海电机学院电气学院,上海201306

出　　处：《电气工程学报》2024年第2期47-54,共8页Journal of Electrical Engineering

摘　　要：转子槽形沿径向偏斜后的电机电磁性能受电机转向影响。为减小偏斜转子槽形电机正反转时的性能差异,提出一种槽身偏斜槽形,保证槽形的槽口区域轴对称。基于转子槽漏磁模型,对比径向偏斜与槽身偏斜槽形,探讨槽形偏斜后的等效磁路变化,以及转子槽漏抗与主电抗参数随偏斜距离的变化规律。利用冻结磁导率法隔断主磁通的气隙路径,假设由槽内导体电流产生的转子漏磁场仅包括槽漏磁场,计算电机正反转下不同槽形偏斜距离时的槽漏抗值,并根据等效电路模型计算相应的主电抗值。最后,仿真计算两类偏斜转子槽电机的输出转矩与功率因数,结果表明转子槽身偏斜电机正反转时的性能接近,而且受槽形偏斜距离的影响较小。偏斜转子槽形的不对称槽口区域是引起电机正反转性能差异的主要原因。The electromagnetic performance of the motor is affected by the rotation direction after the rotor slot shape is inclined.In order to reduce the performance difference between the forward and reverse rotation of the inclined rotor slot motor,a slot shape with slot body inclined is proposed to ensure the axial symmetry of the upper area of the slot shape.Based on the simplified model of leakage flux,a general expression of rotor slot leakage reactance is derived.The slot shapes with radial skewed and slot body inclined are compared,the varied equivalent magnetic circuit is discussed after the slot shape is inclined,as well as the variation trends of the rotor slot leakage reactance and main reactance parameters with the inclined distance.The air-gap path of the main magnetic flux path is isolated with the frozen permeability method,it is assumed that the rotor leakage magnetic field generated by the conductor currents in the slot only includes the slot leakage magnetic field.Considering the influence of the motor rotation direction,the values of slot leakage reactance at different inclined distance are calculated,and the corresponding main reactance values are calculated according to the equivalent circuit.Finally,the output torque and power factor of the two types of inclined slot shape motors are simulated and calculated.The results show that the performances of the rotor slot-body inclined motor are similar in forward and reverse rotation,and the main performances are less attenuated with the inclined distance of the slot shape.The asymmetrical slot opening area of the inclined rotor slot shape is the main reason for the forward and reverse performance difference of the motor.

关 键 词：偏斜槽形 转子槽漏抗 冻结磁导率 感应电机 径向斜槽转子 

分 类 号：TM343[电气工程—电机]