Challenges and strategies in modeling and control of magnetic gears: A review

Magnetic gears (MGs) have emerged as a compelling subject of research in recent years, owing to their distinct advantages over traditional mechanical gears. These benefits encompass the physical isolation between moving components, the elimination of gear lubrication, inherent overload protection, and reduced maintenance requirements. Although various MG topologies have been proposed, each exhibiting unique merits and drawbacks, the complexities arising from nonlinearities and magnetic hysteresis pose substantial challenges in their modeling and control. Extensive investigations into the position, speed, and torque control of MGs have been documented in the literature. This paper presents a comprehensive review of the latest developments in MGs modeling and control, with a particular emphasis on diverse modeling approaches and control strategies. Moreover, the article critically addresses the current limitations and challenges in this domain and outlines promising avenues for future research, highlighting the synergy between theoretical advancements and practical implementations, and underscoring the significance of MGs as a transformative technology.