Abstract
The shape of the magnet is essential to the performance of a slotless permanent magnet linear synchronous machine (PMLSM) because it is directly related to desirable machine performance. This paper presents a reduction in the thrust ripple of a PMLSM through the use of arc-shaped magnets based on electromagnetic field theory. The magnetic field solutions were obtained by considering end effect using a magnetic vector potential and two-dimensional Cartesian coordinate system. The analytical solution of each subdomain (PM, air-gap, coil, and end region) is derived, and the field solution is obtained by applying the boundary and interface conditions between the subdomains. In particular, an analytical method was derived for the instantaneous thrust and thrust ripple reduction of a PMLSM with arc-shaped magnets. In order to demonstrate the validity of the analytical results, the back electromotive force results of a finite element analysis and experiment on the manufactured prototype model were compared. The optimal point for thrust ripple minimization is suggested.
Highlights
INTRODUCTIONAs will be shown here, the longitudinal ends have an influence on the flux distribution in a linear machine
Permanent magnet linear synchronous machines (PMLSMs) are being used with increasing frequency in factory automation for tasks such as positioning in robotic applications and translation systems
The shape of the magnet is essential to the performance of a slotless PMLSM because it is directly related to desirable machine performance
Summary
As will be shown here, the longitudinal ends have an influence on the flux distribution in a linear machine. In response to these considerations, this paper presents a PM pole shape variation technique to reduce the thrust ripple of a slotless PMLSM considering end effect based on electromagnetic field theory. Arc-shaped PMs are used and can be further optimized by adjusting the PM offset on the basis of the mathematical PM model. The present paper is based on our previously developed analytical method for a PMLSM with arc-shaped magnets that introduces mathematical error corrections and boundary conditions.[7,8]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
