Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Abstract:
The effect of the angular shift in the winding layout for a dual three-phase stator winding, squirrel cage induction motor is studied, with emphasis to the phase flux linkages, speed performance characteristics and the torque characteristics. The machines are modelled considering a range of phase spatially shift by interval to phase in the winding layout between the dual winding sets of ABC and DEF windings. An increasing drop in amplitude for the flux linkages of D, E and F phases is observed in the considered models from phase shift to the phase shift, and a decreased value for phase shift. The , , , s and phase shift models show an observed oscillation in their A,B and C fluxes, but no observed oscillations in their D,E and F phase fluxes. The and the phase shift models show the best result at a settling speed of 1497 rpm for a 1500 rpm synchronous speed machine as compared to a settling speed of 1495 rpm and 1492 rpm for and phase shift models. The two models also show the best performance when considering observed speed oscillations recording a value of 0.80176 and 0.60144 before loading and 0.67564 and 0.81161 on loading for and respectively. The phase shift model show the best result only when considering the drop in machine speed on load with a recorded value of 1.00 % drop as compared to a drop value of 1.14 % for and phase shift. The phase shift model shows a better settling time at start and loading for the speed and torque as compared to the , and the phase shift models. The phase shift model is sufficient to represent an accurate model of a six-phase Induction machine when considering a dual 3-phase winding configuration.

Keywords: Six-Phase Induction Machine, Dual Stator winding, Flux Linkages, Finite Element Analysis

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