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A Modified Hybrid PM-Reluctance Coaxial Magnetic Gear with an Alternate Rotor
Mostafa Madanchi Zaj , ‪Seyed Ahmadreza Afsari Kashani‬
Abstract:   (41 Views)
Rare-earth permanent magnet (PM) devices are increasingly facing challenges due to market monopolies. To mitigate these concerns, researchers have focused on reducing the use of rare-earth PMs while maintaining device performance. This study presents a novel hybrid structure for coaxial magnetic gears, combining the benefits of both magnetic and reluctance-based models. The proposed configuration delivers effective torque, reduced losses, and reliable performance at high speeds, all while minimizing magnet volume. The hybrid approach enhances high-speed performance, decreases the reliance on rare-earth magnets, and improves overall efficiency by incorporating reluctance principles into the inner rotor. In addition to new rotor section designs, three alternative hybrid rotor configurations are proposed. Particle Swarm Optimization algorithm is applied for optimization. ANSYS Maxwell and OptiSLang are used for electromagnetic simulation and optimization, and ANSYS Workbench is employed to assess mechanical performance. Unlike previously reported hybrid magnetic gears that rely solely on permanent-magnet-based torque production, the proposed topology combines permanent-magnet excitation and reluctance-based permeance modulation within a unified coaxial magnetic gear architecture.
 
Keywords: magnetic gear, hybrid rotor, reluctance rotor, PM rotor, finite element, torque density, cogging torque.
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Type of Study: Research Paper | Subject: Special Electric Machines
Received: 2025/04/18 | Revised: 2026/08/12 | Accepted: 2026/06/29
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Creative Commons License
© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.