Open AccessMoving magnet linear actuator with self‐holding functionality
Author(s) -
Immonen Paula,
Ruuskanen Vesa,
Pyrhönen Juha
Publication year - 2018
Publication title -
iet electrical systems in transportation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.588
H-Index - 26
eISSN - 2042-9746
pISSN - 2042-9738
DOI - 10.1049/iet-est.2017.0079
Subject(s) - armature (electrical engineering) , magnet , actuator , linear actuator , magnetic circuit , axial symmetry , mechanical engineering , mechanics , electrical engineering , materials science , engineering , physics , structural engineering
Electromagnetic design of a moving magnet frictionless linear actuator with self‐holding functionality for mechanical gear shifting in a transmission application is presented. The actuator consists of a tubular magnetic circuit with stationary armature and axially moving rotating permanent magnet assembly with radial magnetisation in the air gap. The armature contains a two‐piece magnetic core with a space for a winding. The effects of armature slot opening and magnetic circuit materials on the self‐holding force and the acting force are studied in the whole moving range. The designed moving magnet linear actuator improves the performance of the vehicle by enabling shift times below 50 ms with no energy consumption between the shifts.