TY - JOUR
T1 - A Detailed Reliability Study of the Motor System in Pure Electric Vans by the Approach of Fault Tree Analysis
AU - Shu, Xiong
AU - Guo, Yingfu
AU - Yang, Wenxian
AU - Wei, Kexiang
AU - Zhu, Yun
AU - Zou, Hongxiang
N1 - Funding Information:
This work was supported in part by the Hunan Province Science and Technology Innovation Program under Grant 2017XK2303, Grant 2019RS2044, and Grant 2019JJ50099, and in part by the Research Foundation of Education Department of Hunan Province, China, under Grant 18B389.
Publisher Copyright:
© 2013 IEEE.
PY - 2020/1/9
Y1 - 2020/1/9
N2 - Attributing to the unique feature of zero carbon emission, electric vehicles (EVs) are attracting increasing interest in recent years, but their reliability, particularly the reliability of their critical components, is still a matter of concern today. In order to address this issue, much effort has been made before to assess the reliability of drive motor in the EVs. However, drive motor and motor controller are logically integrated and requested to work as one system in the EVs. In contrast to the individual reliability analysis of them, the combined assessment of the two parts can provide a more reliable prediction to the reliability of the entire motor system. Moreover, both drive motor and motor controller are composed of multiple components. The structure, type, and characteristics of these components may affect the reliability of the motor system as well. But these issues have not been considered in the previous research. In order to fill this gap of knowledge, the reliability of the entire motor system of pure electric vans that includes both drive motor and motor controller is investigated in this paper. In the research, the theoretical failure rates of subassemblies and components in drive motor and motor controller are predicted first. Then based on the failure rate prediction results, the reliability of the entire motor system (comprising both drive motor and motor controller) is assessed. Based on the assessment results, some interesting conclusions with respect to the most vulnerable subassemblies and components in the entire motor system and the potential disadvantage of existing reliability research are finally obtained. It is deemed that these new findings will be of great significance to the future reliability design and maintenance of pure electric vans.
AB - Attributing to the unique feature of zero carbon emission, electric vehicles (EVs) are attracting increasing interest in recent years, but their reliability, particularly the reliability of their critical components, is still a matter of concern today. In order to address this issue, much effort has been made before to assess the reliability of drive motor in the EVs. However, drive motor and motor controller are logically integrated and requested to work as one system in the EVs. In contrast to the individual reliability analysis of them, the combined assessment of the two parts can provide a more reliable prediction to the reliability of the entire motor system. Moreover, both drive motor and motor controller are composed of multiple components. The structure, type, and characteristics of these components may affect the reliability of the motor system as well. But these issues have not been considered in the previous research. In order to fill this gap of knowledge, the reliability of the entire motor system of pure electric vans that includes both drive motor and motor controller is investigated in this paper. In the research, the theoretical failure rates of subassemblies and components in drive motor and motor controller are predicted first. Then based on the failure rate prediction results, the reliability of the entire motor system (comprising both drive motor and motor controller) is assessed. Based on the assessment results, some interesting conclusions with respect to the most vulnerable subassemblies and components in the entire motor system and the potential disadvantage of existing reliability research are finally obtained. It is deemed that these new findings will be of great significance to the future reliability design and maintenance of pure electric vans.
KW - electric vehicles
KW - fault tree analysis
KW - motor controller
KW - motor system
KW - Reliability
UR - http://www.scopus.com/inward/record.url?scp=85078244626&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2019.2963197
DO - 10.1109/ACCESS.2019.2963197
M3 - Article
AN - SCOPUS:85078244626
VL - 8
SP - 5295
EP - 5307
JO - IEEE Access
JF - IEEE Access
SN - 2169-3536
M1 - 8946531
ER -