A Survey on the Design and Analysis of Magnetic Screws

A magnetic screw (MS) is a device that utilizes the magnetic field of permanent magnets to convert between linear and rotational motions while achieving the gearing action simultaneously. This offers conversion between high-speed low-torque rotational motion to low-speed high-force translational motion. The most tempting advantage that MSs offer is the contact-free power transfer. This paper provides a comprehensive review of works on MSs describing the state-of-the-art designs and various manufacturing aspects. Moreover, the main approaches for computing the thrust force of MSs are listed along with an analysis of the main parameters and factors that affect the performance of the MS. Furthermore, machine integration and control are discussed as well.