Modelling of a prototype brushless permanent magnet DC linear stepping motor employing a flat-armature winding configuration

This paper presents design and modelling of a prototype brushless permanent magnet dc linear stepping motor employing a flat-armature winding configuration for very low power applications. In order to validate the experimental results obtained for determining the performance of the motor a finite element analysis (FEA) method is employed to compute the flux distributions and developed thrust of the motor. The geometry of the motor, winding configurations and the design procedure are presented. The motor is designed such way that the motor core accommodate twenty four independent multi-layer coil sections wound with enameled copper wire and each layer section has 470 turns without compromising the effective air gap. The percentage accuracy of the result showed good correlation between experimental and analytical values.