The 13th International Symposium on Linear Drives for Industry Application (LDIA2021)

231 / 2021-06-19 19:35:41

A New Unconventional Magnet Arrangement for Linear Permanent Magnet Motors with Semi-FEABased Optimization Approach

Permanent magnet linear motors, optimization, detent force minimization

Linear actuators are frequently used in numerous applications where precise linear movement is needed. Permanent
magnet linear motors (PMLM) provide high force density and accurate positioning and high-operating drive cycle as to other types of
linear motors. The quality of force output for the PMLM mainly depends on detent force component. In this paper, a new approach is
presented to minimize the detent force for PMLM. Proposed approach consists of semi-FEA based optimization of the magnet track,
which considers minimization of the detent force and maximization of the average force output. Proposed approach generates the
magnet layout arbitrarily and tries to find the optimum solutions by 2-dimensioanal (2D) Pareto front. A reference coreless PMLM is
used as a benchmark and the results show that proposed approach is an effective method as to conventional methods and it is possible
to determine the optimum magnet track arrangement design by the proposed approach.