Impact of Slot/Pole Combination on Inter-Turn Short-Circuit Current in Fault-Tolerant Permanent Magnet Machines

Dusek, J.T.; Arumugam, Puvan; Brunson, Christopher; Amankwah, Emmanuel; Hamiti, Tahar; Gerada, Chris

doi:10.1109/tmag.2015.2500894

Cited by 35 publications

(14 citation statements)

References 20 publications

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“…A can be obtained from the formula (23), where x is the PM height, and a 1 = −0.07921, a 2 = 0.2211, and a 3 = 0.8577, when A is calculated for the Front side; but a 1 = −0.09392, a 2 = 0.01569, and a 3 = 0.9449, when A is calculated for the Flank side.…”

Section: (23)mentioning

confidence: 99%

“…Flux leakage was calculated by Li and Chau [15], where the possible flux paths of a PM linear vernier machine were analyzed and identified with an ideal flux source, making it suitable only for bar PMs. FEA has become the first choice of method for electromagnetic calculations on account of its great applicability and accuracy [16][17][18][19][20][21][22][23]; however, FEA cannot obtain the exact results with a low computational cost. The lumped parameter analytical method (LPAM) of an electromagnetic system depends solely on simple empirical formulae and these calculations are very imprecise.…”

Section: Introductionmentioning

confidence: 99%

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Analytical Method for the Magnetic Field Line Distribution of a Fan-shaped Permanent Magnet and the Calculation of Leakage Permeance

Meng¹,

Zhang²,

You³

et al. 2017

JMAG

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Leakage permeance of a permanent magnet (PM) is an important factor for improving the accuracy of electromagnetic device calculations based on a magnetic equivalent circuit (MEC). For PM leakage permeance calculations, the traditional simulation method of finite element analysis (FEA) and the lumped parameter analytical method (LPAM) have been considered; it was found that FEA has the disadvantage of a long calculation time and LPAM has low accuracy. The magnetic field lines distribution analytical method (MFLD) is proposed in this paper in order to raise computational efficiency and keep accuracy within a certain range. The electromagnetic features of open circuit fan-shaped PMs are presented by MFLD and finite element analysis (FEA) is adopted to match the MFLD results. In order to verify the validity of the proposed method in a magnetic system, the working points of PMs in an electromagnetic actuator are calculated, and the numerical results compared with the experimental results.

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Section: (23)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical Method for the Magnetic Field Line Distribution of a Fan-shaped Permanent Magnet and the Calculation of Leakage Permeance

Meng¹,

Zhang²,

You³

et al. 2017

JMAG

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“…Taking the current as fault signal, harmonic spectrum analysis is performed to determine whether the stator winding has an ISCF. In [8], the influence of different slot-pole match and the ISCF position of fault-tolerant PMSM on motor efficiency and short-circuit current are discussed. In [9], an adaptive fuzzy control system for PMBDCM is established.…”

Section: Introductionmentioning

confidence: 99%

Online Diagnosis of Inter-turn Short Circuit for Dual-Redundancy Permanent Magnet Synchronous Motor Based on Reactive Power Difference

et al. 2019

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The Dual-Redundancy Permanent Magnet Synchronous Motor (DRPMSM) with weak thermal coupling and no electromagnetic coupling among phase windings has two sets of three-phase symmetrical windings. Under normal conditions, two sets of windings can operate simultaneously, and once one set has an inter-turn short circuit fault (ISCF), the other set will operate alone, so a DRPMSM can be applied in fields with high reliability requirements. According to the equivalent circuit principle, a simplified model of a DRPMSM when ISCF occurs is established in this paper, and mathematical equations for the equivalent resistance, inductance and induction electromotive force (EMF) are derived. Based on the simplified circuit principle and instantaneous power theory, combined with the analysis of the fundamental wave in the two sets, an online diagnosis method of the ISCF for DRPMSM is proposed based on the reactive power difference and the feasibility of the method is verified by experiments.

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“…The high turn fault current can also cause irreversible demagnetization of the magnets [5]. Significant effort has been devolved to fault tolerant machine design [6,7], fault modeling [8], fault detection and mitigation strategies [9] to avoid or at least alleviate the effects of this severe failure.…”

Section: Introductionmentioning

confidence: 99%

Stator Turn Fault Detection by Second Harmonic in Instantaneous Power for a Triple-Redundant Fault-Tolerant PM Drive

Wang

Griffo

et al. 2018

IEEE Trans. Ind. Electron.

101

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including the URL of the record and the reason for the withdrawal request. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICSAbstract-Fast and reliable detection of stator faults is of key importance for fail-safe and fault tolerant machine drives in order to immediately trigger appropriate fault mitigation actions. The paper presents a detailed analytical and experimental analysis of the behavior of a closed loop controlled permanent magnet machine drive under inter-turn fault conditions. It is shown that significant 2nd harmonic components in the dq voltages, currents, instantaneous active power (IAP) and reactive power (IRP) are generated during turn fault conditions. The analyses further show that the increase of the 2nd harmonic in IAP and IRP during fault conditions is comparatively higher than that of voltage and current, making them ideal candidates as turn fault indicators. A turn fault detection technique based on 2nd harmonic in IAP and IRP is implemented and demonstrated for a triple redundant, fault tolerant permanent magnet assisted synchronous reluctance machine (PMA SynRM) drive. The effectiveness of the proposed detection technique over the whole operation region is assessed, demonstrating fast and reliable detection over most of the operating region under both motoring and generating mode.Index Terms-Fault tolerant, turn fault, fault detection, fault mitigation, 2 nd harmonic, active power, reactive power.

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Impact of Slot/Pole Combination on Inter-Turn Short-Circuit Current in Fault-Tolerant Permanent Magnet Machines

Cited by 35 publications

References 20 publications

Analytical Method for the Magnetic Field Line Distribution of a Fan-shaped Permanent Magnet and the Calculation of Leakage Permeance

Analytical Method for the Magnetic Field Line Distribution of a Fan-shaped Permanent Magnet and the Calculation of Leakage Permeance

Online Diagnosis of Inter-turn Short Circuit for Dual-Redundancy Permanent Magnet Synchronous Motor Based on Reactive Power Difference

Stator Turn Fault Detection by Second Harmonic in Instantaneous Power for a Triple-Redundant Fault-Tolerant PM Drive

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