A Magnetically Geared Lead Screw Without Translator Skewing

Abstract

A magnetically geared lead screw is able to convert high-speed rotation to low-speed translation via magnetic gearing. In this paper a new type of magnetically geared lead screw is presented that uses translator rings without any skewing. The magnetic gearing is accomplished by utilizing an inner rotor with helically skewed magnets and an outer cylinder with a skewed flux focusing magnet arrangement. The operating characteristics and an experimental prototype are presented.