Current limited optimal excitation of magnetically coupled linear variable reluctance motors

Abstract

Abstmcl-This paper explores the design of excitation current profiles for a type of threephase magnetically COUpled linear variable reluctance motor. A model relating force production to air gap geometry is derived using magnetic circuit analysis under an assumption that flux flows across the air gap through tubular paths bounded by straight lines and circular arcs. Constrained Optimization techniques are used for two purposes: first, to determine the motor's continuous force limit corresponding to some given continuous current limit; second, to determine currents that Batisfy the current limits and produce e deslred force with minimum power dissipation. The optimization results indicate that a 6-wire Connection is preferable to a 3-wire connection, and that wide teeth are preferable to narrow teeth, if the goal is to maximize the range of ripple free force.

Linear tubular switched reluctance motor for heart assistance circulatory: Analytical and finite element modeling

“…The windings are concentrated around the poles and the static part is a plate. In [9], a configuration with two Ecores mounted on a carrier structure that moves along a stationary bar is investigated (two air gaps). In [10], a structure called transverse flux tubular switched reluctance motor (TSRM) with concentrated windings around the stator poles is studied (the stator is similar to RSRM one).…”