High Performance Halbach Magnetic Couplings for Aircraft Transmission

With the rapid advancement of More Electric Aircraft (MEA) technologies in modern aeronautics, magnetic couplings have become critical components in power transmission systems. Nevertheless, conventional designs suffer from inherent limitations including excessive weight, bulky dimensions, and high rotational inertia. This paper proposes a novel compact radial Halbach-type magnetic coupling that addresses these challenges through three key innovations: structural optimization of the traditional rotor configuration, magnetic circuit enhancement, and parameter refinement of permanent magnets. Compared to conventional radially magnetized couplings, the proposed design demonstrates a 26% increase in transmitted torque alongside an 18% reduction in overall volume. Finite element simulations reveal a 13% improvement in air-gap magnetic flux density over standard configurations. Furthermore, parametric analysis identifies the magnetic arc length ratio (α) as a critical design variable for torque optimization, while maintaining maximum torque capacity with reduced back-iron thickness. The developed solution achieves exceptional power density for mechanical magnetic transmission systems. Future work will establish a comprehensive mathematical model to further advance Halbach-type magnetic coupling design methodologies and industrial applications.