Impact of a New Winding Scheme - Single Layer on the Performance of Induction Motor Using Experimental and Simulation Techniques

Resumen

The objective of this work is to find a new winding configurations with low harmonics, efficient and economical use of copper for the winding induction motors (IM). For this reason, a laboratory study was carried out with an investigation using ANSYS - Motor Cad tools for simulating the results.  A 1.1kW, 2-pole, 24-slot, 380V, 50Hz three-phase, single-layer squirrel cage induction motor was used in the work. Various coil pitches were tested and simulated; the coil spans were 165° (fractional pitch 11/12), 180° (full pitch), 90° (half pitch 6/12) and the approach of a new winding scheme 105° (7/12). Both experiments and simulation results are presented and compared. The overall testing had shown that the winding scheme in the design with a coil span of 105° has a significant reduction in 3rd, 7th and total harmonic distortions (THD), and also providing efficient output torque compared to other single layer winding configurations. Additionally, this type of configuration requires fewer copper windings.