DocumentCode :
1565525
Title :
Fault Tolerant Operations in Adjustable-Speed Drives and Soft Starters for Induction Motors
Author :
Yeh, Chia-Chou ; Demerdash, Nabeel A O
Author_Institution :
Marquette Univ., Milwaukee
fYear :
2007
Firstpage :
1942
Lastpage :
1949
Abstract :
Fault tolerant operations of soft starters and adjustable-speed drives (ASDs) when experiencing power switch open-circuit or short-circuit faults are presented in this paper. The present low-cost fault mitigation solutions can be retrofitted into the existing off-the-shelf soft starters and ASDs with only minimum hardware modifications. The fault tolerant soft starters are capable of operating in a two-phase mode under the condition of thyristor/SCR open-circuit or short-circuit switch-fault in any one of the phases using a novel resilient closed-loop control scheme. The performance resulted from the present soft starter fault tolerant control has demonstrated reduced starting motor torque transient and inrush current magnitude. As for the ASDs, a low-cost fault mitigation strategy for low-speed applications such as "self-healing/limp-home" needs for vehicles and propulsion systems, with capabilities for mitigating transistor open-circuit and short-circuit switch-faults was developed. The present fault tolerant drive topology requires only minimum hardware modifications to the conventional off-the-shelf six-switch three-phase drive, with only the addition of electronic components such as triacs and fast-acting fuses. In addition, the present approach offers the potential of mitigating not only transistor switch-faults but also drive related faults such as rectifier diode short-circuit fault or dc link capacitor fault. Given in this paper is a complete set of simulation results that demonstrate the soundness and effectiveness of the present fault tolerant approaches.
Keywords :
closed loop systems; fault tolerance; induction motor drives; machine control; thyristor applications; ASD; adjustable-speed drives; fault tolerant control; induction motors; power switch open-circuit faults; power switch short-circuit faults; resilient closed-loop control scheme; silicon controlled rectifier; soft starters; thyristor-SCR; Automotive components; Fault tolerance; Hardware; Induction motors; Propulsion; Surges; Thyristors; Torque control; Variable speed drives; Vehicles; Induction motor; SCR switch-faults; adjustable-speed drive; fault-tolerant operation; limp-home; self-healing; soft starter; transistor switch-faults; two-phase control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
ISSN :
0275-9306
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
Type :
conf
DOI :
10.1109/PESC.2007.4342301
Filename :
4342301
Link To Document :
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