NDLI: Short-Circuit Fault Diagnosis for Three-Phase Inverters Based on Voltage-Space Patterns

Content Provider	IEEE Xplore Digital Library
Author	Alavi, M. Danwei Wang Ming Luo
Copyright Year	1982
Abstract	This paper introduces a fault detection and isolation (FDI) method for faulty metal-oxide-semiconductor field-effect transistors in a three-phase pulsewidth-modulated (PWM) voltage source inverter. Short-circuit switch faults are the leading cause of failure in power converters. It is extremely vital to detect them in the early stages to prevent unwanted shutdown and catastrophic failures in motor drives and power generation systems. Against the common FDI methods for power electronic inverters that use phase currents and PWM gate control signals, the proposed method only uses the inverter output voltages. This method analyzes the PWM switching signals in a time-free domain that is called the voltage space. For a healthy inverter, the projection of the state transitions in the voltage space results in a cubic pattern. Each short-circuit switch fault uniquely changes the voltage-space pattern that allows isolating the faulty switch. The fault detection time is only within one PWM carrier period, which is significantly faster than current-based conventional methods. The FDI result does not depend on the load, the PWM switching frequency, and the feedback loop. This method can address the reliability problem of multilevel inverters in renewable electrical generation systems and can dramatically reduce the number of required sensors.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	5558
Ending Page	5569
Page Count	12
File Size	1169716
File Format	PDF
ISSN	02780046
Volume Number	61
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Inverters Circuit faults Pulse width modulation Logic gates Fault detection Switching circuits voltage space Fault detection and isolation fault diagnosis inverter motor drive pattern analysis pulsewidth modulation (PWM) short-circuit fault state transition Fault detection and isolation (FDI)
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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