Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet
With the recent proliferation of electric vehicles, there is increasing attention on drive motors that are powerful and efficient, with a higher power density. To meet such high power density requirements, the cooling technology used for drive motors is particularly important. To further optimize th...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | World Electric Vehicle Journal |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2032-6653/16/1/50 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832587318059335680 |
|---|---|
| author | Huai-Cong Liu |
| author_facet | Huai-Cong Liu |
| author_sort | Huai-Cong Liu |
| collection | DOAJ |
| description | With the recent proliferation of electric vehicles, there is increasing attention on drive motors that are powerful and efficient, with a higher power density. To meet such high power density requirements, the cooling technology used for drive motors is particularly important. To further optimize the cooling effects, the use of direct oil-cooling technology for drive motors is gaining more attention, especially regarding the requirements for electric vehicle electric oil pumps (EOPs) in motor cooling. In such high-temperature environments, it is also necessary for the EOP to maintain its performance under high temperatures. This research explores the feasibility of using high-temperature-resistant ferrite magnets in the rotors of EOPs. For a 150 W EOP motor with the same stator size, three different rotor configurations are proposed: a surface permanent magnet (SPM) rotor, an interior permanent magnet (IPM) rotor, and a spoke-type IPM rotor. While the rotor sizes are the same, to maximize the power density while meeting the rotor’s mechanical strength requirements, the different rotor configurations make the most use of ferrite magnets (weighing 58 g, 51.8 g, and 46.3 g, respectively). Finite element analysis (FEA) was used to compare the performance of these models with that of the basic rotor design, considering factors such as the no-load back electromotive force, no-load voltage harmonics (<10%), cogging torque (<0.1 Nm), load torque, motor loss, and efficiency (>80%). Additionally, a comprehensive analysis of the system efficiency and energy loss was conducted based on hypothetical electric vehicle traction motor parameters. Finally, by manufacturing a prototype motor and conducting experiments, the effectiveness and superiority of the finite element method (FEM) design results were confirmed. |
| format | Article |
| id | doaj-art-cfc5174f4c5648ab930cae1f21822e1e |
| institution | Kabale University |
| issn | 2032-6653 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | World Electric Vehicle Journal |
| spelling | doaj-art-cfc5174f4c5648ab930cae1f21822e1e2025-01-24T13:52:54ZengMDPI AGWorld Electric Vehicle Journal2032-66532025-01-011615010.3390/wevj16010050Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite MagnetHuai-Cong Liu0Hwaseong Powertrain R&D Center, Hyundai-Transys, 95, Hyundaikia-ro, Namyang-Eup, Hwaseong-si 18280, Republic of KoreaWith the recent proliferation of electric vehicles, there is increasing attention on drive motors that are powerful and efficient, with a higher power density. To meet such high power density requirements, the cooling technology used for drive motors is particularly important. To further optimize the cooling effects, the use of direct oil-cooling technology for drive motors is gaining more attention, especially regarding the requirements for electric vehicle electric oil pumps (EOPs) in motor cooling. In such high-temperature environments, it is also necessary for the EOP to maintain its performance under high temperatures. This research explores the feasibility of using high-temperature-resistant ferrite magnets in the rotors of EOPs. For a 150 W EOP motor with the same stator size, three different rotor configurations are proposed: a surface permanent magnet (SPM) rotor, an interior permanent magnet (IPM) rotor, and a spoke-type IPM rotor. While the rotor sizes are the same, to maximize the power density while meeting the rotor’s mechanical strength requirements, the different rotor configurations make the most use of ferrite magnets (weighing 58 g, 51.8 g, and 46.3 g, respectively). Finite element analysis (FEA) was used to compare the performance of these models with that of the basic rotor design, considering factors such as the no-load back electromotive force, no-load voltage harmonics (<10%), cogging torque (<0.1 Nm), load torque, motor loss, and efficiency (>80%). Additionally, a comprehensive analysis of the system efficiency and energy loss was conducted based on hypothetical electric vehicle traction motor parameters. Finally, by manufacturing a prototype motor and conducting experiments, the effectiveness and superiority of the finite element method (FEM) design results were confirmed.https://www.mdpi.com/2032-6653/16/1/50EOPferrite magnetsurface permanent magnetinterior permanent magnetspoke-type IPMfinite element method |
| spellingShingle | Huai-Cong Liu Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet World Electric Vehicle Journal EOP ferrite magnet surface permanent magnet interior permanent magnet spoke-type IPM finite element method |
| title | Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet |
| title_full | Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet |
| title_fullStr | Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet |
| title_full_unstemmed | Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet |
| title_short | Design, Analysis, and Comparison of Electric Vehicle Electric Oil Pump Motor Rotors Using Ferrite Magnet |
| title_sort | design analysis and comparison of electric vehicle electric oil pump motor rotors using ferrite magnet |
| topic | EOP ferrite magnet surface permanent magnet interior permanent magnet spoke-type IPM finite element method |
| url | https://www.mdpi.com/2032-6653/16/1/50 |
| work_keys_str_mv | AT huaicongliu designanalysisandcomparisonofelectricvehicleelectricoilpumpmotorrotorsusingferritemagnet |