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Load test of an induction motor

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Reference no: EM131090808

Write a research report on load test of an induction motor, in report below points should be included proprly, the repoer should contanins 2000 words. The below given purpose need to be elaborated properly : 

Induction motors are the basic components in today’s electric machinery. So, we started to research on induction motors. Induction motor is a very vast topic. Hence, we decided to research on its load characteristics. We searched methods for determining its load characteristics and chose one method to work becausethe required apparatus for that method was available in our lab. The apparatus consisted of measuring unit, brake control unit, terminal board, three phase induction motor coupled with a generator and a load consisting of electrical bulbs of 200W. That method used a shunt generator but shunt generator was not suitable because of low residual magnetism which gave inappropriate results. Therefore, we switched to separately excited generator which had a separate field supply and had more induced magneto motive force. We gathered data from experiments, analyzed it and plot torque slip curve, output versus efficiency, reactive power versus efficiency, speed versus efficiency, power factor versus efficiency, torque versus efficiency  graphs to see the trends and relationship between them by changing the load. We got better results as compared to the results which were obtained by using shunt generator. So, we recommend separately excited generator.

Your report should cover below points :

List of Tables

  • load test using two wattmeter method of three phase measurement

List of figures

Block Diagram of Setup 

  • Connection diagram
  • Graph between torque and efficiency
  • Graph between power factor and efficiency
  • Graph between speed and efficiency
  • Graph between reactive power and efficiency
  • Graph between output power and efficiency

List of symbols

  • T Torque Developed by the motor
  • Nr Speed of rotor in rpm
  • Ns Synchronous speed in rpm
  • Wr Speed of rotor in radian per second
  • VL Load voltage
  • IL Load current
  • Pout Output power
  • WT Total true three phase power
  • Q Reactive Power
  • cosφ Power Factor
  • η Efficience

Reference no: EM131090808

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