Fault Tolerant Soft Starter Control for Induction Motors

  • V. Jaikrishna
  • Linss T. Alex
  • Subhranhsu Sekhar Dash
  • Susanta Kumar Gachhayat
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 326)


This thesis presents a fault-tolerant soft starter capable of operating in a two-phase mode in the event of a thyristor/SCR open-circuit or short-circuits switch-fault in any one of the phases using closed-loop control scheme. This soft starter fault-tolerant control will reduce starting motor torque pulsations and reduced inrush current magnitudes. Faults occurring in soft starters do not cause immediate permanent damage to the motor-soft starter system. But the impact of a fault on both the soft starter and the motor will gradually evolve into a severe damage stage if the fault is left unattended. A DSP controller is used to give the triggering pulses to the thyristors connected in antiparallel. This thesis includes the simulation of fault tolerant closed loop control of induction motor with SCR switch fault.


Open Loop Induction Motor Torque Pulsation Gate Driver Firing Angle 
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Copyright information

© Springer India 2015

Authors and Affiliations

  • V. Jaikrishna
    • 1
  • Linss T. Alex
    • 1
  • Subhranhsu Sekhar Dash
    • 1
  • Susanta Kumar Gachhayat
    • 1
  1. 1.Department of Electrical and Electronics EngineeringSRM UniversityChennaiIndia

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