Abstract
The time old conventional starting schemes though have been in use for many years exhibit some drawbacks and such drawbacks can be overcome only with power electronic motor starters. The advent of modern power electronic devices and the control systems supported by modern digital processing units have led to the development of digital power electronic soft starting schemes that guaranteed higher degrees of compliance of the requirements of an ideal soft starter for the induction motor. This research paper presents the results of the comparative study of the two versions of soft starting schemes viz the phase angle control and extinction angle control and brings about the highlights, by way of MATLAB / SIMULINK based simulation and experimental verification, and the advantages of the extinction angle control.
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