Inverter fault-identification for VSI motor drives

Gaeta, Alberto; Scarcella, G.; Scelba, G.; De, S.; Testa, A.

doi:10.1109/demped.2011.6063656

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…In addition, ensuring precise speed control of the IM requires the use of complex vector control techniques, such as direct torque control (DTC) or direct field-oriented control (DFOC) [2,3]. The practical implementation of these control methods requires the use of devices also susceptible to failure, such as frequency converters [4,5] and appropriate measuring equipment, including current and voltage sensors, rotor speed, or position sensors [6,7].…”

Section: Introductionmentioning

confidence: 99%

Self-Correcting Virtual Current Sensor Based on the Modified Luenberger Observer for Fault-Tolerant Induction Motor Drive

Adamczyk

Orłowska-Kowalska

2021

Energies

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Fault-tolerant control (FTC) solutions are increasingly being used in modern drive systems with AC motors. Such systems provide a higher degree of security and solutions that allow the on-line detection and localization of failures, as well as the switching of the control mode to a mode that allows us to continue the operation or safely stop the drive system. As the current sensors (CSs) are necessary to ensure precise control of the AC motors, in the event of their failure, one of two strategies can be used—hardware or software redundancy. The first strategy requires the use of additional measuring sensors. For this reason, the algorithmic solution, based on the Luenberger Observer (LO), has been proposed in this article as one of the software redundancy methods. In contrast to methods presented in the literature, the proposed solution allows one not only to compensate the stator current in a phase with a faulty CS, but also to adjust the correction of current estimation based on a measured signal in the other phase with a healthy CS. Extensive simulation studies in the direct rotor flux-oriented control (DRFOC) structure with the induction motor (IM) confirm the effectiveness of the proposed method. In addition, the proposed solution allows the drive system to be controlled even if all CSs are damaged.

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Section: Introductionmentioning

confidence: 99%

Self-Correcting Virtual Current Sensor Based on the Modified Luenberger Observer for Fault-Tolerant Induction Motor Drive

Adamczyk

Orłowska-Kowalska

2021

Energies

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“…However, due to the operating conditions or random events, various types of damage may occur in IM drive systems. Failures may be related to the motor [1], voltage inverter [2][3][4] (e.g. damage to the IGBT transistors [5,6]), but also to measuring equipment [7][8][9][10][11], such as resolvers [12], encoders [13][14][15][16][17], sensors for measuring currents and voltages [8,14,15,18].…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Adamczyk,

Orlowska-Kowalska

2021

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Modern induction motor (IM) drives with a higher degree of safety should be equipped with fault-tolerant control (FTC) solutions. Current sensor (CS) failures constitute a serious problem in systems using vector control strategies for IMs because these methods require state variable reconstruction, which is usually based on the IM mathematical model and stator current measurement. This article presents an analysis of the operation of the direct torque control (DTC) for IM drive with stator current reconstruction after CSs damage. These reconstructed currents are used for the stator flux and electromagnetic torque estimation in the DTC with space-vector-modulation (SVM) drive. In this research complete damage to both stator CSs is assumed, and the stator current vector components in the postfault mode are reconstructed based on the DC link voltage of the voltage source inverter (VSI) and angular rotor speed measurements using the so-called virtual current sensor (VCS), based on the IM mathematical model. Numerous simulation and experimental tests results illustrate the behavior of the drive system in different operating conditions. The correctness of the stator current reconstruction is also analyzed taking into account motor parameter uncertainties, especially stator and rotor resistances, which usually are the main parameters that determine the proper operation of the stator flux and torque estimation in the DTC control structure.

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“…During normal operation, the additional switches are open and the motors are independently driven. Differently, when a failure occurs in whatever inverter leg, the last is quickly isolated [13][14][15][16] and some (or all) switches SW j are turned on. As an example, Fig.…”

Section: Introductionmentioning

confidence: 99%

Current sharing strategies for fault tolerant AC multi-drives

Scelba

Scarcella

Pulvirenti

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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Thanks to an inner redundancy, AC Multi-Drives can be made fault tolerant with minor modifications of their structure. However, some additional components are generally required in order to create emergency current paths in case of a fault. According to a recently presented approach the amount of additional components can be reduced by exploiting healthy drives to support faulty drives. In this case current and power sharing among drives assumes a key role. The paper deals with some new current sharing methodologies for AC multi-drive systems, where a suitable interaction among healthy and faulty drives is exploited, in order to cope with one or more faults. Specifically, three different current sharing control methods are presented and evaluated by means of simulations and experimental tests, taking into account the effects of operations in fault conditions both on healthy and faulty drives.

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Inverter fault-identification for VSI motor drives

Cited by 7 publications

References 16 publications

Self-Correcting Virtual Current Sensor Based on the Modified Luenberger Observer for Fault-Tolerant Induction Motor Drive

Self-Correcting Virtual Current Sensor Based on the Modified Luenberger Observer for Fault-Tolerant Induction Motor Drive

Bulletin of the Polish Academy of Sciences: Technical Sciences

Current sharing strategies for fault tolerant AC multi-drives

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