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Stress intensity analysis on insulation damage of 10 kV AC motor end winding under complex electromagnetic force
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Haijun ZHANG1, 2, Mingjie ZHANG1, Xiaoyong CHEN2, Shaohua WAN1, Ji GUO1
Insulating Materials | 2023, 56(1) : 45 - 50
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Insulating Materials | 2023, 56(1): 45-50
• Insulation Technology •
Stress intensity analysis on insulation damage of 10 kV AC motor end winding under complex electromagnetic force
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Haijun ZHANG1, 2, Mingjie ZHANG1, Xiaoyong CHEN2, Shaohua WAN1, Ji GUO1
Affiliations
  • 1Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arts and Science, Xiangyang 441053, China
  • 2NRE Electric Co., Ltd., Xiangyang 441899, China
Published: 2023-01-20 doi: 10.16790/j.cnki.1009-9239.im.2023.01.008
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Aimed at the early fault of 10 kV high power traction motor end winding insulation layer, the failure mechanism of insulation layer crack damage under complex electromagnetic and mechanical forces was analyzed on the basis of fracture mechanics theory. A three-dimensional analysis model was established by using the finite element method, and the stress-strain states of the insulating layer crack at different positions were calculated numerically by piecewise loading electromagnetic force. At the same time, the stress intensity factor was introduced to evaluate the degree of crack damage expansion. The results show that compared with the insulating layer crack damage at the nose end, the crack expansion speed at the rod joint is faster and the fracture degree is greater. The initial damage state of the crack also has an important influence on the fracture and expansion degree, and the transverse crack is easier to expand.

motor end winding  /  fracture damage  /  finite element analysis  /  crack expansion  /  fault mechanism
Haijun ZHANG, Mingjie ZHANG, Xiaoyong CHEN, Shaohua WAN, Ji GUO. Stress intensity analysis on insulation damage of 10 kV AC motor end winding under complex electromagnetic force[J]. Insulating Materials, 2023 , 56 (1) : 45 -50 . DOI: 10.16790/j.cnki.1009-9239.im.2023.01.008
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.01.008
  • Receive Date：2022-01-11
  • Online Date：2025-11-21
  • Published：2023-01-20
Article Data
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History
  • Received：2022-01-11
  • Revised：2022-03-23
Funding
Affiliations
    1Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arts and Science, Xiangyang 441053, China
    2NRE Electric Co., Ltd., Xiangyang 441899, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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