Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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A novel power quality improved AC voltage controller for soft starting of squirrel cage induction motors

  • Mohamed Faizal (Department of Electrical and Electronics Engineering, V V College of Engineering) ;
  • G. Kannayeram (Department of Electrical and Electronics Engineering, Sri Ramakrishna Institute of Technology) ;
  • Agnes Prema Mary (Department of Electronics and Communication Engineering, Jayaraj Annapackiam CSI College of Engineering)
  • Received : 2023.09.28
  • Accepted : 2024.02.14
  • Published : 2024.07.20
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Abstract

Soft starting of a squirrel cage induction motor (SCIM) is a general requirement in industries. Until now, the soft starting systems of squirrel cage induction motors have been using phase angle controllers implemented using thyristors. The major disadvantage of thyristors-based control is that the source current becomes polluted with harmonics. In addition, while phase angle-controlled soft starting schemes are suitable for star connected motors, they introduce high torque ripple resulting in noise and turbulence. To overcome this issue, a novel soft starting topology is proposed for the squirrel cage induction motors that guarantees improved power quality on both the source side and the load side. The proposed system uses a three-phase power electronic chopper with a freewheeling arrangement. Throughout the starting process, the source side current is sinusoidal and the source side power factor is unity. The proposed method has been found to be useful for both Star and Delta connected squirrel cage induction motors. The proposed system has been validated using simulations in the MATLAB/Simulink environment and on an experimental prototype.

Keywords

References

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