The Influence of Screw Holes of the Yoke on the Balance of 3-Phase No-Load Currents and Stator Core Loss

Abstract

Abstract:

As for the problems of unbalanced 3-phase no-load currents and stator core loss caused by screw holes on the yoke, the influence of screw holes of the yoke on the balance of 3-phase no-load currents is presented in the paper and the relationship between screw holes and the core loss is analyzed. Theoretical analysis and finite element simulation both show that the existence of screw holes on the yoke causes a magnetic saturation, the magnetic saturation significantly increases in the three-phase current imbalance and causes a rise in stator core loss. In order to reduce the impact of the yoke screw holes on the motor’s performance, a motor structure with 3 screw holes on the yoke is presented. Simulation and experimental results show that the three screw holes motor structure can solve the current imbalance, and the core loss values are more reasonable.

Key words: Induction motor, 3-phase unbalanced currents, core loss, finite element method

CLC Number:

TM301

Sun Yue,Chen Lei,Bao Xiaohua. The Influence of Screw Holes of the Yoke on the Balance of 3-Phase No-Load Currents and Stator Core Loss[J]. Journal of Electrical Engineering, 2015, 10(10): 69-74.

Figures/Tables 6

Fig.1

Tab.1

Fig.2

Fig.3

Fig.4

Fig.5

References 10

[1]	关玉昌, 刘维君, 王文喜 . 浅析定子冲片缺边对电机性能的影响[J]. 爆炸性环境电气防爆技术, 1995(3):8-10.
	Guan Yuchang, Liu Weijun, Wang Wenxi . Analysis of the effect of lacking edge of stator punching on motor’s performance[J]. Electrical Explosion-Proof Technology for Explosive Atmospheres, 1995 ( 3):8-10.
[2]	李积继, 李建生, 刘靖华 . 定子铁心扣片槽参数分析[J]. 防爆电机, 1996(4):6-9.
	Li Jiji, Li Jiansheng, Liu Jinhua . The parameter analysis of stator core cleat groove[J]. Explosion-Proof Electric Machine, 1996(4):6-9.
[3]	Kim Ki-Chan, Sung Ki-Young, Hwang Su-Jin. A study on the performance of three phase induction motor with rectangle stator core [C]. International Conference on Electrical Machines and Systems(ICEMS), 2010: 1443-1446.
[4]	Zhu Z Q, Chen J T, Wu L J , et al. Influence of stator asymmetry on cogging torque of permanent magnet brushless machines[J]. IEEE Transactions on Magnetics, 2008,44(11):3851-3854. doi: 10.1109/TMAG.2008.2001322
[5]	赵海森, 刘晓芳, 杨亚秋 , 等. 基于时步有限元分析的超高效电机定子槽形优化设计[J]. 中国电机工程学报, 2011,31(33):115-120.
	Zhao Haisen, Liu Xiaofang, Yang Yaqiu, et al. Stator slot optimal design of premium motors based on time-stepping finite element method[J]. Proceedings of the CSEE, 2011,31(33):114-122.
[6]	Lee Jeong-Jong, Kwori Soon-O, Hong Jung-Pyo, et al. Core loss distribution of three-phase induction motor using numerical method [C]. 31st International Telecommunications Energy Conference, 2009: 1-4.
[7]	张艳丽, 李玉梅, 刘洋 , 等. 考虑不同磁特性模型的感应电机铁心损耗分析[J]. 中国电机工程学报, 2013,33(27):120-126.
	Zhang Yanli, Li Yumei, Liu Yang , et al. Analysis of core losses in induction motors considering different magnetic property models[J]. Proceedings of CSEE, 2013,33(27):120-126.
[8]	Masato Enokizono . Effect of stator construction of three-phase induction motors on core loss[J]. IEEE Transactions on Magnetics, 2003,39(3):1484-1487. doi: 10.1109/TMAG.2003.810195
[9]	Krzysztof Komeza, Maria Dems. Field and circuit calculation of the core losses in the energy-saving small-size induction motor [C]. XIX International Conference on Electrical Machines, 2010: 53-57.
[10]	Spooner T, Kincaid C W . No-load induction motor core losses[J]. Transactions of the American Institute of Electrical Engineers, 2009,48(2):645-654. doi: 10.1109/T-AIEE.1929.5055261

电机参数	数值
额定功率/kW	5.56
额定转速/（r/min）	1 750
额定电压/V	460
额定频率/Hz	60
槽配合（定子/转子）	48/44
外径/mm	238
长度/mm	150
极数	4

[1]	HAN Rui,TANG Youyi,XU Xiongming,JIAO Kaikai,XIN Zhicheng,YAN Zhiwei,BAO Xiaohua. Analysis and Simulation of Electromagnetic Noise of Induction Motors for Electric Vehicles [J]. Journal of Electrical Engineering, 2019, 14(3): 74-80.
[2]	CHEN Lei. Deflection Calculation of Curved Eccentricity in Large Induction Motor [J]. Journal of Electrical Engineering, 2019, 14(2): 47-54.
[3]	Yang Jiangfei,Guan Hua,Yang Chunhua,Bao Xiaohua. Influence of Load Variation on Performance of Permanent Magnet Synchronous Motor [J]. Journal of Electrical Engineering, 2018, 13(9): 20-25.
[4]	Zhang Man,Ran Junde,Tian Zhihua,Fei Xigang,Zou Can,Hu Fei. Study of the Model of Electrical Field Distribution of Bundle Conductor After Energized Rime Icing [J]. Journal of Electrical Engineering, 2018, 13(8): 43-48.
[5]	Yang Xiong,Zhang Fengge,Wang Xiuping. Electromagnetic Characteristics Analysis of Primary Permanent Magnet Linear Motor for Rail Transit [J]. Journal of Electrical Engineering, 2018, 13(5): 1-7.
[6]	Liu Hong,Li Hong. Research on Improved Direct Torque Control System of Induction Motor [J]. Journal of Electrical Engineering, 2018, 13(4): 11-17.
[7]	Yin Yi,Wu Jiandong,Hu Jialei,Zhang Lei,Sun Lu,Shen Yaojun. Simulation of Electric Field Distortion Caused by Interface Morphology Between Insulation and Shielding in HVDC Cables [J]. Journal of Electrical Engineering, 2018, 13(11): 30-36.
[8]	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.
[9]	Zheng Jianfen,Wang Chunfang,Wang Fang,Xia Dongwei. Electromagnetic and Thermal Field Modeling of Wind Power Reactor Based on Amorphous and Silicon-Steel Hybrid Core [J]. Journal of Electrical Engineering, 2017, 12(10): 19-24.
[10]	Lan Zhiyong,Wei Xuehuan,Li Huru,Liao Keliang,Chen Linhong. Thermal Analysis of PMSM Based on Lumped Parameter Thermal Network Method [J]. Journal of Electrical Engineering, 2017, 12(1): 17-21.
[11]	Ni Youyuan,Sun Miao. No-Load Magnetic Field Analysis of a PM Canned Motor with Different Structure Parameters of Tooth Tips [J]. Journal of Electrical Engineering, 2017, 12(1): 9-16.
[12]	Peng Zhihua,Wang Xiaofang,Zhu Dan,Lin Li,Yuan Xulong. Simulation Research on Three Dimensional Leakage Magnetic Field and Short-Circuit Impedance of the Collapse of the Three-Phase Five-Column Transformer [J]. Journal of Electrical Engineering, 2016, 11(5): 46-50.
[13]	Wang Shuangyi,Zhang Fengge,Liu Guangwei. Electromagnetic Design and Temperature Field Analysis of a High Speed Claw Motor with Outer Permanent Magnetic Rotor [J]. Journal of Electrical Engineering, 2015, 10(9): 1-7.
[14]	Hu Yan,Wang Gongchen. Electromagnetic Design and Research of High Speed Permanent Magnet Generator for Aviation [J]. Journal of Electrical Engineering, 2015, 10(9): 22-29.
[15]	Li Yan,Liu Jianan,Xia Jiakuan. Electromagnetically Excited Vibration Calculation and Analysis for a Three-Phase Asynchronous Motor with Finite Element Method [J]. Journal of Electrical Engineering, 2015, 10(9): 30-34.