Fault-Tolerant Soft Starter Control of Induction Motors With Reduced Transient Torque Pulsations

Document Type

Article

Language

eng

Format of Original

12 p.

Publication Date

12-2009

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Source Publication

IEEE Transactions on Energy Conversion

Source ISSN

0885-8969

Abstract

Fault-tolerant operation of induction motors fed by soft starters when experiencing thyristor/silicon-controlled rectifier open-circuit or short-circuit switch fault is presented in this paper. The present low-cost fault mitigation solution can be easily retrofitted, without significant cost increase, into the existing off-the-shelf three-phase soft starters to enhance the reliability and fault-tolerant capability of such soft starter systems. In the event of either thyristor open-circuit or short-circuit switch fault in any one of the phases, the fault-tolerant soft starters are capable of operating in a two-phase control mode using a novel resilient closed-loop control scheme. The performance resulted from the present fault-tolerant soft starter control has demonstrated reduced motor starting transient torque pulsations as well as reduced motor inrush current magnitude. The present fault-tolerant approach is applicable to any soft starters that control small to large integral horsepower induction motors. Simulation results along with supporting experimental results for a 1.492-kW, 460-V, four-pole, three-phase induction motor are presented here to demonstrate the soundness and effectiveness of the present fault-tolerant approach.

Comments

IEEE Transactions on Energy Conversion, Vol. 24, No. 4 (December 2009): 848-859. DOI.

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