earticle

영어

As environmental concerns become a global issue, wind turbines are gaining attention as a sustainable energy solution. Traditional wind turbines use a mechanical gearbox to transfer energy from the low-speed, high-torque blades to the high-speed, low-torque generator. However, mechanical gearboxes present various challenges due to mechanical contact. To address these issues, considerable research has been conducted on magnetic gears. Since magnetic gears operate without mechanical contact, they offer advantages such as high transmission efficiency and inherent overload protection. Various topologies exist for magnetic gears, and with the introduction of modulating gear topology, torque density has been significantly improved. Many studies are focused on further enhancing torque density, one of which involves the use of superconductors. This paper presents the design of a magnetic gear using REBCO superconducting coil magnets to enhance torque density compared to conventional permanent magnet magnetic gears. The design optimization was conducted using the Non-Dominated Sorting Genetic Algorithm II (NSGAII). The performance was evaluated in terms of torque ripple, torque density, and efficiency. In the magnetic gear applying superconductor, it demonstrates performance with lower torque ripple (0.16%/0.25%), lower losses (229 kW), higher efficiency (96.35%), and higher torque density (1.086 MNm/m³).