Title :
Smoother thrust on multi-polar type linear DC motor
Author :
Wakiwaka, H. ; Senoh, S. ; Yajima, H. ; Yamada, H. ; Oda, J.
Author_Institution :
Fac. of Eng., Shinshu Univ., Nagano, Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
As compared with a mono-polar type linear DC motor (LDM), multi-polar type LDM can have a longer stroke and more thrust with thin shape. However, there is thrust ripple on the multi-polar LDM. In this paper, a design to prevent thrust ripple is discussed. In order to achieve smoother thrust on multi-polar type LDM, the structure of the LDM is set as a 2-phase coil type. This paper clarifies that the thrust ripple of the LDM has a minimum value of 1.68%, a pole pitch of 15 mm, a coil width of 12 mm and a permanent magnet width of 10 mm
Keywords :
DC motors; finite element analysis; linear motors; machine theory; permanent magnet motors; 10 mm; 12 mm; 15 mm; 2-phase coil type structure; FEM; coil width; motor design; multi-polar type linear DC motor; permanent magnet width; pole pitch; smoother thrust; spatial distortion factor; stroke; thrust ripple prevention; Automatic control; Coils; DC motors; Magnetic analysis; Manufacturing automation; Office automation; Permanent magnets; Shape; Stators; Velocity control;
Journal_Title :
Magnetics, IEEE Transactions on
