A Novel High-Performance Linear Magnetic Gear

Abstract

Currently, the demand for high force density linear actuators is being met almost exclusively by employing a leadscrew and nut to transform rotary motion to linear motion. This paper describes an alternative technology, viz. a linear magnetic gear, which employs rare-earth magnets and which could be used in conjunction with a conventional linear actuator. Simulation studies have shown that such a gear has a highly competitive force transmission density.