Influence of Rotor Slot on Additional Loss of Cage Induction Motor

doi:10.11985/2017.11.002

Abstract

Abstract:

The additional loss plays an important role in motor’s temperature rise and efficiency characteristic, which numeric value is influenced by core structure in motors. In this paper, the cause and calculation method of additional loss in cage induction motor were discussed in details, and the possibility of decrease the additional loss by changing slot’s shape has been analyzed. Models of different rotor slot were established and additional loss in the core and rotor bars were calculated desperately by 2-D finite element method. The conclusion could be obtained by comparison and analysis, the additional loss was influenced by rotor slot, especially the slot’s width. It means that, optimization of rotor slot could be taken as an effective method for reducing motor’s additional loss.

Key words: Cage induction motor, rotor slot, additional loss, finite element method

CLC Number:

TM315

Na Liang,Xiaohua Bao. Influence of Rotor Slot on Additional Loss of Cage Induction Motor[J]. Journal of Electrical Engineering, 2017, 12(11): 7-11.

Figures/Tables 8

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References 12

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电机参数	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
转子外径/mm	536
转子内径/mm	280
铁心长度/mm	580
定子槽数（双层绕组）	60
转子槽数	47
极对数	2
定子槽开口/mm	15
转子槽开口/mm	1
转子每根导条的电阻/Ω	3.73×10^-5

槽形	定转子铁心/W	转子导条/W	总附加损耗/W
槽形1	3 065.7	8 745.4	11 811.1
槽形2	3 068.7	8 503.7	11 572.4
槽形3	3 089.8	8 568.3	11 658.1
槽形4	3 218.1	8 654.0	11 872.1

m = b_s2/b_s3	定转子铁心/W	转子导条/W	总的附加损耗/W
0.602 5	3 065.6	8 997.7	12 063.3
1	3 065.7	8 745.4	11 811.1
1.2	3 013.3	7 454.8	10 468.1

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