| ABSTRACT |
In this project, the three phase AC induction motor have been thoroughly investigated and analyzed in terms of the induction motor parameter, efficiency and loss segregation. Through out this project, a new rotor which has 0.35mm lamination steel sheet and 8mm rotor bar size is fabricated and compared with the existing rotor which has 0.50 mm and 10mm rotor bar size. The first part of the comparison is done by software simulation using Motorsolve (IM) Software between existing rotor bar and new rotor bar for the same 0.5HP stator slot design and winding configuration. The Motorsolve (IM) Software is compared in terms of power loss, magnetic flux density, magnetic field intensity, eddy current density, torque vs. speed, torque vs. slip, power loss vs. speed and power loss vs. slip. The second part is the hardware comparison between the fabricated new rotor bars with the existing rotor bar. In this part, the new rotor bar and existing rotor bar are tested using no load, blocked rotor, and DC resistance test to obtain the difference of efficiency, losses and power factor improvement. The load test is also performed to investigate the efficiency of the induction motor at low load factor and result shows that at lower load, the induction motors lose its efficiency. From the overall experiment of software and hardware, results shows that new rotor bar does increase the efficiency to 3.2% and reduce losses to 17.2 watts compare to existing rotor bar. An economical aspect is presented to show the amount of energy and money that can be saved from replacing the existing rotor bar with a new rotor bar. As for the annual energy saving (AES) and total cost saving (TCS), the new rotor manage to save 138.7kWh per year and utility billing by RM45.51 per year per motor. Finally a rough estimation of 100,000 pieces induction motor that have been replaced with the new rotor bars is assumed and shows that it will save approximately RM4.5 million.
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