DESIGN OF HIGH EFFICIENCY 4 KW INDUCTION MOTOR

Abstract

Induction motors are the most widely used motors because they have simple structures, low cost, easy to maintenance and they can be connected directly to the grid. But, the efficiency of these motors is partially low. Therefore, the improvement of 1% in the motor efficiency will result in an annual energy saving of 20 billion kWh. In this study, a 4 kW induction motor design with has IE3 energy efficiency is conducted using ANSYS RMxprt tool. In order to increase the efficiency, many changes such as the use of copper in the rotor, slot type and shape change have been realized. A motor efficiency of close to 90% is obtained. This is a very good value for an induction motor with a power rating of 4 kW.