Open AccessDesign of a high thrust density moving magnet linear actuator with magnetic flux bridge
Author(s) -
Ahmad Zahoor,
Hassan Adnan,
Khan Faisal,
Lazoglu Ismail
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2019.0789
Subject(s) - thrust , stator , magnet , finite element method , actuator , linear motor , magnetic flux , mechanical engineering , axial symmetry , mechanics , control theory (sociology) , physics , magnetic field , materials science , electrical engineering , engineering , computer science , structural engineering , control (management) , quantum mechanics , artificial intelligence
This article presents a design of a high thrust density moving magnet linear actuator for linear refrigerator compressor. The shape of permanent magnet (PM) shows great effect on cost, fabrication and magnetic flux density generation in the actuator. Axially magnetised disk shaped PMs are low cost and convenient for fabrication. Moreover, axially magnetised PMs generate high flux density in a specific direction compared to radial magnets. This paper investigates the design of axially magnetised moving magnet linear oscillating actuator (LOA) which operates on single phase alternating supply. Additionally, an alternative path is proposed for the return of magnetic flux from mover to the stator. Using finite element method (FEM) tools, all the parameters of LOA are optimised. Moreover, with the help of a specially designed experimental setup, FEM simulation results are validated. This actuator demonstrates great advancement in thrust force density, motor constant and output power compared to the size of proposed LOA.