Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels
Recently, as carbon emission regulations enforced by the International Maritime Organization (IMO) have become stricter and pressure from the World Trade Organization (WTO) to abolish tax-free fuel subsidies has increased, the demand for electric propulsion systems in the marine sector has grown. Mo...
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MDPI AG
2025-06-01
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| author | Gi-haeng Lee Yong-min You |
| author_facet | Gi-haeng Lee Yong-min You |
| author_sort | Gi-haeng Lee |
| collection | DOAJ |
| description | Recently, as carbon emission regulations enforced by the International Maritime Organization (IMO) have become stricter and pressure from the World Trade Organization (WTO) to abolish tax-free fuel subsidies has increased, the demand for electric propulsion systems in the marine sector has grown. Most small domestic fishing vessels rely on tax-free fuel and have limited cruising ranges and constant-speed operation, which makes them well-suited for electric propulsion. This paper proposes replacing the internal combustion engine system of such vessels with an electric propulsion system. Based on real operating conditions, an Interior Permanent Magnet Synchronous Motor (IPMSM) was designed and optimized. The Savitsky method was used to calculate total resistance at a typical cruising speed, from which the required torque and output were determined. To reduce torque ripple, an asymmetric dummy slot structure was proposed, with two dummy slots of different widths and depths placed in each stator slot. These dimensions, along with the magnet angle, were set as optimization parameters, and a metamodel-based optimal design was carried out. As a result, while meeting the design constraints, torque ripple decreased by 2.91% and the total harmonic distortion (THD) of the back-EMF was lowered by 1.32%. |
| format | Article |
| id | doaj-art-d9b5872d1525494d9df1d49fa0b0e82b |
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| issn | 2076-0825 |
| language | English |
| publishDate | 2025-06-01 |
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| series | Actuators |
| spelling | doaj-art-d9b5872d1525494d9df1d49fa0b0e82b2025-07-25T13:08:46ZengMDPI AGActuators2076-08252025-06-0114731410.3390/act14070314Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion VesselsGi-haeng Lee0Yong-min You1Department of Future Mobility Convergence, Chonnam National University, Gwangju 61186, Republic of KoreaDepartment of Future Mobility Convergence, Chonnam National University, Gwangju 61186, Republic of KoreaRecently, as carbon emission regulations enforced by the International Maritime Organization (IMO) have become stricter and pressure from the World Trade Organization (WTO) to abolish tax-free fuel subsidies has increased, the demand for electric propulsion systems in the marine sector has grown. Most small domestic fishing vessels rely on tax-free fuel and have limited cruising ranges and constant-speed operation, which makes them well-suited for electric propulsion. This paper proposes replacing the internal combustion engine system of such vessels with an electric propulsion system. Based on real operating conditions, an Interior Permanent Magnet Synchronous Motor (IPMSM) was designed and optimized. The Savitsky method was used to calculate total resistance at a typical cruising speed, from which the required torque and output were determined. To reduce torque ripple, an asymmetric dummy slot structure was proposed, with two dummy slots of different widths and depths placed in each stator slot. These dimensions, along with the magnet angle, were set as optimization parameters, and a metamodel-based optimal design was carried out. As a result, while meeting the design constraints, torque ripple decreased by 2.91% and the total harmonic distortion (THD) of the back-EMF was lowered by 1.32%.https://www.mdpi.com/2076-0825/14/7/314electric propulsion vesselshipInterior Permanent Magnet Synchronous Motor (IPMSM)torque rippledummy slotmetamodel |
| spellingShingle | Gi-haeng Lee Yong-min You Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels Actuators electric propulsion vessel ship Interior Permanent Magnet Synchronous Motor (IPMSM) torque ripple dummy slot metamodel |
| title | Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels |
| title_full | Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels |
| title_fullStr | Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels |
| title_full_unstemmed | Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels |
| title_short | Optimal Design for Torque Ripple Reduction in a Traction Motor for Electric Propulsion Vessels |
| title_sort | optimal design for torque ripple reduction in a traction motor for electric propulsion vessels |
| topic | electric propulsion vessel ship Interior Permanent Magnet Synchronous Motor (IPMSM) torque ripple dummy slot metamodel |
| url | https://www.mdpi.com/2076-0825/14/7/314 |
| work_keys_str_mv | AT gihaenglee optimaldesignfortorqueripplereductioninatractionmotorforelectricpropulsionvessels AT yongminyou optimaldesignfortorqueripplereductioninatractionmotorforelectricpropulsionvessels |