Transverse edge effects in linear induction motors

An Analytical Method for Predicting 3-D Eddy Current Loss in Permanent Magnet Machines Based on Generalized Image Theory

“…Applying the current vector potentials given in (23)-(28) to (32)- (34), the image coefficients are determined and given in (35) and (36).…”

“…Because of the influence of the end windings and the fringe effect, the flux density due to the armature winding and magnets decreases in the regions close to the axial ends of the machine lamination stack. Numerous work have been undertaken to examine the phenomenon analytically [35] [36] and by 3D FE [37] [38]. It is shown in these studies that the affected length of the air gap in the axial direction is approximately equal to the radial thickness of the equivalent air gap which is the sum of the magnet thickness and air gap.…”

Fundamental characteristics of molten metal flow control by linear induction motor

“…There is a large difference between the measured data and the one-dimensional model calculation data. The reason is that the edge effect of linear induction motor [5] is large at the insulated edge corner in the square nozzle.…”

Analysis of electromagnetic forces in a single-sided short rotor linear induction motor

“…1 along with the coordinate system used. Earlier works in this direction deal with some simplified cases like (i) infinitely long and wide stator and rotor or, (ii) infinitely long but finitely wide stator and rotor, symmetrically placed with respect tc each other ( [3], [5], [l]). The present analysis which is partly analytical and partly numerical does away with these restrictions.…”

“…j , = -j F~~( z ) e i (~s t -k~) (5) Now the vector potential due to stator current at any field point(z', y', 2') can be expressed as…”