Power Switch Open-Circuit Fault Diagnosis of Six-Phase Fault Tolerant Permanent Magnet Synchronous Motor System Under Normal and Fault-Tolerant Operation Conditions Using the Average Current Park's Vector Approach

In this paper, a diagnostic method based on symmetrical and DC components is presented for multiple open-circuit faults (OCFs) in a three-phase permanent magnet synchronous motor drive. The remaining phase currents under faulty situations are theoretically analyzed based on the Fourier series method and the mechanism of torque generation. To evaluate the asymmetry and discriminate fault types, the magnitude ratio of the positive sequence to the negative sequence of phase currents is designed as a fault detection index. Thereafter, the DC components of the phase currents in different reference frames are utilized to locate faults.Specifically, the polarities of the DC contents in the natural reference frame are utilized to locate a single OCF and two OCFs in different legs. Two OCFs in the same leg are diagnosed by evaluating the signs of the phase currents in the dq reference frame with a negative rotating direction. The simulated and experimental results validate the effectiveness of the developed method in fault detection and robustness against operating point and motor parameter variations.

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“…For the remaining healthy phases, the instantaneous currents can be deduced using the Lagrange multiplier method [26] as 2 sin( ) sin ( )…”

Section: Faulty Conditionmentioning

confidence: 99%

An open-circuit fault diagnosis method for PMSM drives using symmetrical and DC components

Huang

Wang

et al. 2021

Chin. J. Electr. Eng.

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“…At present, compared with the three-phase PMSM, there are fewer relevant kinds of literature on the open-circuit diagnosis of the six-phase PMSM drive. Because the sixphase PMSM has many parameters, complex conditions, and many considerations, it is necessary to propose a comprehensive diagnosis method that combines multiple methods [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Open-Circuit Fault Diagnosis of Six-Phase Permanent Magnet Synchronous Motor Drive System Based on Empirical Mode Decomposition Energy Entropy

Zhang

et al. 2021

IEEE Access

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This paper proposes a method to diagnose the open-circuit faulty phases and faulty points of the six-phase permanent magnet synchronous motor (PMSM) drive circuit. The current sensor is used to obtain the six-phase current signal, and the least mean square error (LMS) adaptive filtering algorithm is used to filter out the vibration and noise. Empirical Mode Decomposition (EMD) is performed on the filtered current signals, and the EMD energy entropy of each phase current signal is calculated. The change of energy entropy can simplify the double-bridge arm open-circuit fault to the single-bridge arm opencircuit fault, which reduces the number of fault characteristics. After the faulty phase is judged by the change of energy entropy, the fault diagnosis system can diagnose the specific faulty point according to the normalized average value of each phase current signal. Finally, the current data of normal state and fault state are used to train the support vector machine (SVM) and classify the fault state. Each type of fault can be accurately diagnosed by substituting experimental data into the SVM. Experimental results prove that the proposed method can accurately diagnose the open-circuit faults of the six-phase PMSM drive system. INDEX TERMS Six-phase permanent magnet synchronous motor, open-circuit fault, empirical mode decomposition, energy entropy, support vector machine.

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“…The switch devices in the converter are susceptible to open circuit failures under high switching operations, which can also cause the structural asymmetry and then bring undesired torque ripples. A great number of works have proposed solutions to suppress the torque ripples under the open circuit of phases and switches, such as [21,22,23,24], while there are seldom works concentrating on the dual-loop compensations under faulty conditions, let along in multiphase machinery research fields. On the basis of above discussions, a dual-loop disturbance/fault compensation mechanism is developed via ESO considering switch and phase open situations.…”

Section: Introductionmentioning

confidence: 99%

ESO-based FTC strategy via dual-loop compensations for 5-phase PMSG integrated tidal applications

Liu

Houari

Machmoum

et al. 2021

IEICE Electron. Express

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Using multiphase permanent magnet synchronous generators (PMSG) is able to strengthen whole reliabilities of the tidal stream energy systems. Even so, advanced fault-tolerant control designs are also needed for a further enhancement of multiphase PMSG integrated tidal stream turbine under harsh sea water environments. Thus, extended state observers are used to develop a fault-tolerant control strategy towards a trapezoidal five-phase PMSG incorporated tidal stream application. This FTC strategy considers open circuit of a phase and a switch in the five-phase PMSG and its connected converter. To attenuate influences due to these faults, a dual-loop compensation mechanism is performed via extended state observers. System adaptation to swell effects of the tidal stream and feasibility of the proposed FTC strategy are verified through a 1.5 MW simulation setup.

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Power Switch Open-Circuit Fault Diagnosis of Six-Phase Fault Tolerant Permanent Magnet Synchronous Motor System Under Normal and Fault-Tolerant Operation Conditions Using the Average Current Park's Vector Approach

Cited by 50 publications

References 33 publications

An open-circuit fault diagnosis method for PMSM drives using symmetrical and DC components

An open-circuit fault diagnosis method for PMSM drives using symmetrical and DC components

Open-Circuit Fault Diagnosis of Six-Phase Permanent Magnet Synchronous Motor Drive System Based on Empirical Mode Decomposition Energy Entropy

ESO-based FTC strategy via dual-loop compensations for 5-phase PMSG integrated tidal applications

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