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Study on Discharge Breakdown Characteristics of Drive Motor Bearings under Rotational Speed-Force-Thermal Coupling
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Wei Chen1, Lihui Zhao1, 2, 3, Zhen Wang1, Shuo Weng1, 2, 3, Dongdong Zhang1, 2, 3
Automobile Technology | 2023, (10) : 42 - 50
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Automobile Technology | 2023, (10): 42-50
• Selected Papers of SAECCE 2023 •
Study on Discharge Breakdown Characteristics of Drive Motor Bearings under Rotational Speed-Force-Thermal Coupling
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Wei Chen1, Lihui Zhao1, 2, 3, Zhen Wang1, Shuo Weng1, 2, 3, Dongdong Zhang1, 2, 3
Affiliations
  • 1 University of Shanghai for Science and Technology, Shanghai 200093
  • 2 CMIF Key Laboratory for Strength and Reliability Evaluation of Automotive Structures, Shanghai 200093
  • 3 Public Technology Platform for Reliability Evaluation of New Energy Vehicles in Shanghai, Shanghai 200093
Published: 2023-10-24 doi: 10.19620/j.cnki.1000-3703.20230733
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To clarify the discharge breakdown characteristics of drive motor bearing (discharge voltage, discharge current, discharge energy, discharge current density, etc.) and its influencing factor, thus reduce electrical erosion damage, a common mode equivalent circuit with concentrated parameters of a drive motor was established to extract shaft voltage. This paper determined the threshold voltage under the minimum oil film thickness according to the theory of elastic flow lubrication, analyzed the discharge breakdown characteristics of the bearing in combination with the discharge breakdown model, and clarified the variation law of the discharge breakdown characteristics under different rotational speed, temperature and force. The results show that as the rotational speed decreases and the temperature and radial force increase, the discharge breakdown characteristics related characteristics gradually decrease, meanwhile the effect of speed and temperature on the breakdown characteristics of the bearing is significantly higher than that of radial force.

Drive motor  /  Bearing  /  Electrical spark corrosion  /  Speed  /  Temperature  /  Radial forces  /  Discharge breakdown characteristic
Wei Chen, Lihui Zhao, Zhen Wang, Shuo Weng, Dongdong Zhang. Study on Discharge Breakdown Characteristics of Drive Motor Bearings under Rotational Speed-Force-Thermal Coupling[J]. Automobile Technology, 2023 , (10) : 42 -50 . DOI: 10.19620/j.cnki.1000-3703.20230733
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Article Info
doi: 10.19620/j.cnki.1000-3703.20230733
  • Online Date：2025-12-07
  • Published：2023-10-24
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  • Revised：2023-08-11
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Affiliations
    1 University of Shanghai for Science and Technology, Shanghai 200093
    2 CMIF Key Laboratory for Strength and Reliability Evaluation of Automotive Structures, Shanghai 200093
    3 Public Technology Platform for Reliability Evaluation of New Energy Vehicles in Shanghai, Shanghai 200093
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表12种不同金属材料的力学参数
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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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