感应电机定子轭部螺钉孔对三相空载电流平衡度和定子铁耗的影响

电气工程学报 ›› 2015, Vol. 10 ›› Issue (10): 69-74.

感应电机定子轭部螺钉孔对三相空载电流平衡度和定子铁耗的影响

孙跃¹,陈垒²,鲍晓华²

^1. 安徽皖南电机股份有限公司泾县 242500
^2. 合肥工业大学电气与自动化工程学院合肥 230009

收稿日期:2015-03-24 出版日期:2015-10-25 发布日期:2020-01-03
作者简介:孙跃, 男 1973年生,电总工程师,研究方向为电机设计及电机制造。|陈垒男 1990年生,硕士研究生,研究方向为电机优化设计。

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

Sun Yue¹,Chen Lei²,Bao Xiaohua²

^1. Anhui Wannan Electric Machine Co., Ltd Jingxian 242500 China
^2. Hefei University of Technology Hefei 230009 China

Received:2015-03-24 Online:2015-10-25 Published:2020-01-03

摘要/Abstract

摘要：

本文针对感应电机定子铁心轭部螺钉孔造成的空载三相电流不平衡和定子铁耗增加的问题,探究了铁心轭部螺钉孔对空载电流平衡度的影响,并分析了铁心轭部螺钉孔与电机铁耗之间的关系。理论分析和有限元仿真均表明,螺钉孔的存在所造成的轭部局部磁饱和显著增加了三相电流不平衡度,并且提高了定子的铁心损耗。为了降低轭部螺钉孔对电流平衡度和铁心损耗的影响,本文提出了定子铁心轭部有3个螺钉孔的电机结构。仿真和试验结果表明,当铁心轭部有3个螺钉孔时能够较好地解决电流不平衡的问题,铁心损耗值也较为合理。

关键词: 感应电机, 三相不平衡电流, 铁心损耗, 有限元方法

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

中图分类号:

TM301

孙跃,陈垒,鲍晓华. 感应电机定子轭部螺钉孔对三相空载电流平衡度和定子铁耗的影响[J]. 电气工程学报, 2015, 10(10): 69-74.

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.

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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