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This paper introduces a new type of high-performance linear actuator that is attractive for many potential applications. Structure simplification and processing technology are quite essential in promoting the development of the magnetic screw. The novelty of the proposed magnetic screw is the adoption of a discretized permanent magnet (PM), discretized ferromagnetic iron, and an ideal helix ferromagnetic iron ring. The discretized ferromagnetic iron is sandwiched between the two discretized PMs for forming a cell, and the ideal helix ferromagnetic iron was surfaced on the specified lead composed of PM cells. The configuration of the newly designed magnetic screws is presented, and its electromagnetic performances are analyzed by using the time-stepping finite-element method, verifying the advantages of the proposed structure.
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Ling et al. (2016) studied this question.
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