Abstract
In this study, we compared the industrial induction motors sold by leading international companies and developed a 7.5 ㎾ super premium (IE4) class 4-pole three-phase induction motor, the prototype for which was designed and produced herein. We designed and fabricated a stator, an Al/Cu rotor, housing, bearing front and rear covers made of Al 6061, a shaft, and a cooling fan. The cooling fan produced with 3D printing technology was assembled on the unload shaft. Following motor assembly, its mechanical performance such as noise, vibration, wind speed, and efficiency were analyzed. Compared with the considered international-standard motors, our proposed motor exhibited superior performance in terms of noise, balancing, and efficiency. In this paper, IE4-class efficiency was achieved with Al and Cu die-casting rotors. In the future, we plan to achieve IE5-class efficiency with Cu die-casting and develop Al/Cu hybrid rotor fabrication technology.
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