Abstract
Abstract
The mixed winding layouts proposed in this
paper are obtained by combining double and triple layer
(DTL) windings in stator slots. Previous work has touched
upon on the ability of three-and five-phase induction machines
(IMs) with mixed winding layouts to produce torque with less
ripple contents. However, their advantage when operating
under open-circuited faults is yet to be comprehensively
reported. This paper presents the fault-tolerant ability of Fivephase
Induction Machines (FPIMs) with mixed winding
layouts to produce torque with less ripple contents. The
windings are designed as 2-pole and chorded with one slot,
thereafter referred to as “DTL-14/15” and when chorded with
two slots, thereafter referred to as “DTL-13/15. The magnetic
conditions in the FPIMs are analyzed using Finite Element
Method (FEM). The results evidenced that the FPIMs with the
proposed DTL-14/15 and DTL-13/15 chorded coils reduced the
torque ripple by a margin of about 60 % while operating with
open-circuited faults respect to FPIMs with conventional
double layer (DL) winding of the same coil span and operating
under the same conditions. The results also prove that there is
a great correlation between FEM (simulation) and
experimental results.