This paper presents a design procedure for fractional slots three phase tubular linear permanent machines. The considered machine has solid iron mover and stator core, concentrated pre-wound stator windings and rare earth annular magnets with axial magnetization. The stator winding interacts with the mover magnets through the fifth harmonic of its magneto motive force distribution. The proposed design procedure analytically determines proper dimensions of the basic geometry. A finite element method optimization of the air-gap flux density profile focused on the shape of slots, teeth, and polar expansions, completes the design procedure. The work evaluates the effectiveness of the solid iron fractional slot tubular machine for low speed applications. Experimental verifications will be included.
Design and characterization of a fractional slots tubular linear permanentmagnet machine
DI STEFANO, Roberto;MARIGNETTI, Fabrizio
2011-01-01
Abstract
This paper presents a design procedure for fractional slots three phase tubular linear permanent machines. The considered machine has solid iron mover and stator core, concentrated pre-wound stator windings and rare earth annular magnets with axial magnetization. The stator winding interacts with the mover magnets through the fifth harmonic of its magneto motive force distribution. The proposed design procedure analytically determines proper dimensions of the basic geometry. A finite element method optimization of the air-gap flux density profile focused on the shape of slots, teeth, and polar expansions, completes the design procedure. The work evaluates the effectiveness of the solid iron fractional slot tubular machine for low speed applications. Experimental verifications will be included.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
