DocumentCode :
2865598
Title :
Circuit-based induction motor drive reliability under different control schemes and safe-mode operation
Author :
Bazzi, Ali M. ; Ding, Xiangyu ; Dominguez-García, Alejandro ; Krein, Philip T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA
fYear :
2011
fDate :
6-11 March 2011
Firstpage :
653
Lastpage :
660
Abstract :
This paper proposes a reliability modeling method for induction motor drives based on an equivalent dq0 circuit model. The machine input voltages or currents are modeled as sources dependent on states and commands. This enables reliability analysis for different control strategies. The method utilizes failure modes and effects analysis, Monte Carlo simulations, and Markov models. Different controllers, in addition to faults in the machine, power electronics, and sensors, are addressed. The control methods considered in the analysis include constant volts per hertz (V/f), indirect field-oriented control (IFOC), direct torque control (DTC), and feedback linearization control (FLC). Direct line operation (DLO) is also considered. The proposed circuit-based reliability modeling method is versatile and easy to implement in commercial circuit simulators. The simulation model, which is experimentally verified, uses a reliability tool to evaluate the mean time to failure (MTTF) of the drive. Results show that, as expected, V/f control has the highest MTTF, due to its independence from sensor feedback, but poor dynamics. Among the closed-loop controllers, IFOC and DTC are better for fast dynamics, simplicity, and acceptable MTTF, but FLC is shown to have the longest MTTF. A safe-mode control scheme is proposed under which the drive is shown to have an even longer MTTF than V/f.
Keywords :
Markov processes; Monte Carlo methods; closed loop systems; equivalent circuits; fault simulation; induction motor drives; linearisation techniques; machine vector control; power electronics; reliability; torque control; Direct line operation; Markov model; Monte Carlo simulation; circuit simulators; circuit-based induction motor drive; closed-loop controller; constant volts per hertz; control scheme; direct torque control; effects analysis; equivalent circuit model; failure mode; feedback linearization control; indirect field- oriented control; machine fault; machine input current; machine input voltage; mean time to failure; power electronics; reliability modeling method; safe-mode control scheme; safe-mode operation; sensor feedback; Circuit faults; Integrated circuit modeling; Integrated circuit reliability; Mathematical model; Rotors; Sensors; Motor drive reliability; backup controller induction motor drives; faults in motor drives; reliability enhancement; safe mode controller;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE
Conference_Location :
Fort Worth, TX
ISSN :
1048-2334
Print_ISBN :
978-1-4244-8084-5
Type :
conf
DOI :
10.1109/APEC.2011.5744665
Filename :
5744665
Link To Document :
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