笼型感应电机转子槽肩角对电机性能的影响

摘要/Abstract

摘要：

槽肩角常见于笼型电机转子的半开口槽中,主要用来改变槽的刚度和电机的性能。然而,在普通电机设计中对于槽肩角的选择并没有一个确定的标准,通常都选用特定的30°角。本文以平行槽为例讨论了转子槽肩角对于电机性能的影响,建立了不同角度槽肩角的电机模型,并利用二维有限元时谐场对其进行精确计算,考虑趋肤效应,探讨了槽肩角对于转子导条中导条阻抗的影响,同时计算了电机转矩、电流与转子铜耗,为电机设计中槽肩角的选择提供了参考和依据。

关键词: 交流阻抗, 槽肩角, 笼型电机

Abstract:

Slot shoulder angle in the rotor semi-open slot is used for improving the slot stiffness and motor’s performance. However there are no strict criteria in choosing the angle’s degree and 30° is the most common angle used in the slot designing. In this paper, parallel slot is used as the example for discussing the influence of rotor slot shoulder angle on motor’s performance. Models of motors with different slot shoulder angles are established in time-harmonic field and precise calculations are carried out by 2D finite element method. The effect of rotor slot shoulder angle on the bar resistance and leakage inductance, considered the influence of skin effect, is emphatically investigated. And motor’s performances such as torque, current, rotor copper loss, and rotor eddy current loss are also evaluated. The result for this research could provide a reference in choosing the degree for slot shoulder angle.

Key words: AC value of impedance, slot shoulder angle, cage induction

中图分类号:

TM315

孙跃. 笼型感应电机转子槽肩角对电机性能的影响[J]. 电气工程学报, 2015, 10(8): 68-73.

Sun Yue. Influence of Rotor Slot Shoulder Angle on the Performance of Cage Induction Motors[J]. Journal of Electrical Engineering, 2015, 10(8): 68-73.

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参考文献 12

[1]	Gyeorye Lee . Optimal shape design of rotor slot in squirrel-cage induction motor considering torque characteristic[J]. IEEE Trans. Magn., 2013,49(5):2197-2200. doi: 10.1109/TMAG.2013.2239626
[2]	Young Sun Kim . Effects of rotor bar shape for squirrel cage induction motor in transient state using moving motor in transient state using moving band technique[J]. IEEE Trans. Supercond., 2014,24(3):520-604.
[3]	Zhang Dianhai . A new optimal design method of rotor slot of three-phase squirrel cage induction motor for NEMA class D speed-torque characteristic using multi-objective optimization algorithm[J]. IEEE Trans. Magn., 2012,48(2):879-882. doi: 10.1109/TMAG.2011.2174040
[4]	Aldo Boglietti . Computational algorithms for induction-motor equivalent circuit parameter determination——part I: resistances and leakage reactance[J]. IEEE Trans. Ind Electron., 2011,58(9):3723-3733. doi: 10.1109/TIE.2010.2084974
[5]	Ling Zaixun . Equivalent circuit parameters calculation of induction motor by finite element analysis[J]. IEEE Trans. Magn., 2014,50(2):602-604.
[6]	Maksimkina Julijia . The need to consider the skin effect in the study of direct start-up of a squirrel-cage induction motor[C]. Pro. ECT, 2013: 106-110.
[7]	C.del Perugia . Skin effect factor in the bar extension of large two-pole induction motors by three-dimensional finite-element simulations[J]. IEEE Trans. Magn., 2006,42(10):3404-3406. doi: 10.1109/TMAG.2006.879711
[8]	Wu Yinzhen . Calculation of skin effect for double-cage rotor bar of the induction machine[J]. Pro. CSEE., 2003,23(3):116-120.
[9]	Williamson S . Calculation of the bar resistance and leakage reactance of cage rotors with closed slots[J]. Pro. IEE., 1985,132(3):125-132.
[10]	David G Dorrell . Calculation and effects of end-ring impedance in cage induction motors[J]. IEEE Trans. Magn., 2005,42(3):1176-1183.
[11]	Tapani Jokinen. Design of rotating electrical machines[M]. New Jersey: John Wiley & Sons, Ltd Press, 2008.
[12]	Hung Vu Xuan . Influence of stator slotting on the performance of permanent-magnet machines with concentrated windings[J]. IEEE Trans. Magn., 2013,49(2):929-938. doi: 10.1109/TMAG.2012.2212025

参数	数值
额定功率/kW	1 000
额定电压/kV	10
定子外径/mm	850
定子内径/mm	540
极对数	2
定子槽数	60
转子槽数	47
铁心长度/mm	500
气隙长度/mm	2

槽肩角/（°）	直流电阻/Ω	交流电阻/Ω
槽肩角/（°）	直流电阻/Ω	额定状态	起动状态
0	3.2241e-5	3.2246e-5	7.6539e-5
10	3.2388e-5	3.2393e-5	7.6775e-5
20	3.2546e-5	3.2552e-5	7.7226e-5
30	3.2728e-5	3.2733e-5	7.7903e-5
40	3.2954e-5	3.2960e-5	7.8947e-5
50	3.3262e-5	3.3267e-5	8.0729e-5
60	3.3750e-5	3.3755e-5	8.4474e-5

槽肩角/（°）	直流漏感 /H	交流电感/H
槽肩角/（°）	直流漏感 /H	额定状态	起动状态
0	3.5518e-6	4.4196e-6	5.5222e-7
10	3.6189e-6	4.5006e-6	6.0650e-7
20	3.6902e-6	4.6238e-6	6.7135e-7
30	3.7712e-6	4.8104e-6	7.6260e-7
40	3.8706e-6	5.1031e-6	8.7335e-7
50	4.0047e-6	5.4697e-6	9.9988e-7
60	4.2097e-6	6.0457e-6	1.1738e-6