Comparison of Harmonics, THD and Temperature Analysis of 3-Phase Induction Motor with Normal Inverter Drive and 5-Level DCMI Drive

Manjesh*
Associate Professor, Department of Electronic Science, Bangalore University, Bengaluru, Karnataka, India.
Periodicity:April - June'2018
DOI : https://doi.org/10.26634/jee.11.4.14655

Abstract

In the present technology, the applications of DC motors are replaced by induction motors due to its advantages. Most of the applications are in domestic and industrial applications. The motor used in industrial applications are high torque and long working time, frequently used motors, therefore the efficiency and life time of the motor is very essential factors to be monitored during its working. In this work, the normal voltage source inverter and multilevel inverter are used to run the motor. The major hurdle of using an inverter is, it produces harmonics and these harmonics induce the unnecessary current and voltage harmonics into the loads. These harmonics are simply dissipated as heat in the motor and degrade the motor performance with reducing the motor lifetime. To study the effects of different levels of multi-level inverter drives with respect to heating of the motor, the thermocouples are placed at different parts of the induction motor. The harmonic study is carried out with 3-Phase Normal Inverter Drive and the 3-Phase Diode Clamped Multilevel Inverter (DCMI) drive with 5-Level, the comparison has been done with Normal Inverter Drive and Five Level DCMI drive. The reduction of harmonics is observed using 5-Level DCMI Drive, then the study has been extended experimentally to analyse the temperature of Three Phase Induction Motor. The rate of rise temperature of induction motor is obtained and found to be less than the Normal Inverter Drive, the work has been evaluated by the results presented in this work.

Keywords

Five Level Inverter, Variable Speed Drives, Harmonics, THD, Temperature Analysis.

How to Cite this Article?

Manjesh (2018). Comparison of Harmonics, THD and Temperature Analysis of 3-Phase Induction Motor with Normal Inverter Drive and 5-Level DCMI Drive. i-manager’s Journal on Electrical Engineering, 11(4), 9-17. https://doi.org/10.26634/jee.11.4.14655

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