TY - GEN
T1 - New Cooling Structure for Improving the Oil Cooling Effects of the End Winding of Flat Winding
AU - Cai, Wei
AU - Li, Guicang
AU - Yang, Yongxi
AU - Gong, Haigui
N1 - Publisher Copyright:
© Beijing Paike Culture Commu. Co., Ltd. 2025.
PY - 2025
Y1 - 2025
N2 - The oil-cooled flat-wire winding machines characterized with high electromagnetic loads and high power densities are widely used in for electric vehicle. However, high AC losses and large differences between the interlayer are inevitable when the motor operated in high-speed operation, posing serious challenges to reliable cooling of the motors. The transported winding with multi-segmented winding could significantly suppress the AC loss, but its end winding space structure is complex and might affect the cooling effect of winding. In this paper, the electrical machine with end transported winding is taken as the research object. The fluid-solid coupling model with oil and gas two-phase flow for the end transported winding is established, and the fluid distribution and local hot spot distribution are then analyzed. A new oil-injection structure is then proposed and are optimized with the Taguchi approach. The simulation result shows that the maximum temperature of the end winding is reduced by approximately 20 ℃ with the proposed oil-injection structure.
AB - The oil-cooled flat-wire winding machines characterized with high electromagnetic loads and high power densities are widely used in for electric vehicle. However, high AC losses and large differences between the interlayer are inevitable when the motor operated in high-speed operation, posing serious challenges to reliable cooling of the motors. The transported winding with multi-segmented winding could significantly suppress the AC loss, but its end winding space structure is complex and might affect the cooling effect of winding. In this paper, the electrical machine with end transported winding is taken as the research object. The fluid-solid coupling model with oil and gas two-phase flow for the end transported winding is established, and the fluid distribution and local hot spot distribution are then analyzed. A new oil-injection structure is then proposed and are optimized with the Taguchi approach. The simulation result shows that the maximum temperature of the end winding is reduced by approximately 20 ℃ with the proposed oil-injection structure.
KW - AC loss
KW - electrical machine with flattened winding
KW - Oil-cooling structure
KW - temperature field of the end winding
UR - https://www.scopus.com/pages/publications/85216640106
U2 - 10.1007/978-981-96-1379-3_60
DO - 10.1007/978-981-96-1379-3_60
M3 - Conference contribution
AN - SCOPUS:85216640106
SN - 9789819613786
T3 - Lecture Notes in Electrical Engineering
SP - 578
EP - 587
BT - The Proceedings of the 19th Annual Conference of China Electrotechnical Society
A2 - Yang, Qingxin
A2 - Bie, Zhaohong
A2 - Yang, Xu
PB - Springer Science and Business Media Deutschland GmbH
T2 - 19th Annual Conference of China Electrotechnical Society, ACCES 2024
Y2 - 20 September 2024 through 22 September 2024
ER -