Fault-Tolerant Operation of Wound Field Synchronous Machine Using Coil Switching

Ayub, Muhammad; Atiq, Shahid; Sirewal, Ghulam Jawad

doi:10.1109/access.2019.2918504

Cited by 16 publications

(12 citation statements)

References 23 publications

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“…However, it requires advanced power electronics, which adds costs [20]. A similar strategy utilizing sub-harmonic components has been recently proposed [146], [147].…”

Section: ) Zero Sequence (C4)mentioning

confidence: 99%

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

et al. 2019

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Wound-field synchronous machines (WFSMs) are included in the majority of large power generating units and special high-power motor drives, due to their high efficiency, flexible field excitation and intrinsic flux weakening capability. Moreover, they are employed in a wide range of high-end solutions in the low-to-medium power range. This contribution presents a comprehensive survey of classical and modern methods and technologies for excitation systems (ESs) of WFSMs. The work covers the fundamental theory, typical de-excitation methods and all the modern excitation equipment topologies in detail. It also includes a description of the state-of-the-art and the latest trends in the ESs of wound-field synchronous motors and generators. The purpose of the paper is to provide a useful and up-to-date reference for practitioners and researchers in the field.

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“…However, it requires advanced power electronics, which adds costs [20]. A similar strategy utilizing sub-harmonic components has been recently proposed [146], [147].…”

Section: ) Zero Sequence (C4)mentioning

confidence: 99%

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

et al. 2019

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“…To eliminate the above‐mentioned inherent deficiencies associated with conventional WRSMs, several researchers have proposed brushless topologies 14‐17 . These brushless topologies were developed considering third‐harmonic field‐excitation technology 18…”

Section: Introductionmentioning

confidence: 99%

Brushless field‐excitation method for wound‐rotor synchronous machines

Bukhari

Ahmad

Akhtar

et al. 2021

Int Trans Electr Energ Syst

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Summary This paper proposes a simplified harmonic field‐excitation scheme for the brushless operation of wound‐rotor synchronous machines (WRSMs). The proposed scheme involves two inverters that are operating at different frequencies to provide an input current to the armature winding of the machine. One of these two inverters works at a frequency of 60 Hz and provides the regular three‐phase fundamental current, whereas the second inverter works at 180 Hz frequency to supply the single‐phase third‐harmonic to the common point of the start‐connected stator winding of the machine. The proposed method has the advantage that a conventional single‐phase inverter can be used for generating the third‐harmonic current which only needs to be operated at three times the frequency of the first inverter supplying the three‐phase fundamental current. The fundamental three‐phase current generates the main armature field, and the single‐phase third‐harmonic current produces a pulsating magnetomotive force, that induces electromotive force (EMF) in the harmonic winding of the rotor. The induced EMF is rectified to supply field current to the rotor and generates the rotor field. This field, when interacts with the main armature field, produces torque. The proposed brushless field‐excitation scheme for WRSMs is implemented in JMAG‐Designer version 19.1 using 2‐D finite element analysis to realize its operation and analyze its performance.

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“…This also applies to safety-critical applications. For such applications, popular induction motors [1][2][3], brushless motors with permanent magnets [4][5][6][7][8][9], synchronous motors [10][11], and switched reluctance motors [12][13][14] are suitable. Each of these motors meets, to a greater or lesser extent, the criteria for increased reliability.…”

Section: Introductionmentioning

confidence: 99%

Frequency analysis in fault detection of dual‐channel BLDC motors with combined star–delta winding

Korkosz

Prokop

Pakla

et al. 2021

IET Electric Power Appl

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This study compares the properties of dual-channel brushless DC motors with permanent magnets (DCBLDCMs) in three configurations of the stator windings of both channels. An analysis was performed of star-connected (Y), delta-connected (Δ), and combined star-delta (YΔ) channel windings. A proprietary mathematical model of a DCBLDCM machine with combined star-delta windings is presented. Each type of winding configuration was evaluated in terms of tolerance to the occurrence of a discontinuity in the channel. An Fast Fourier Transform (FFT) analysis of the selected voltage signal was used to diagnose the operating status of the DCBLDCM. It was demonstrated that it provides unambiguous information about the operating status of individual channels of the motor. In the case od 24/10 DCBLDCM design, the harmonic spectra of a selected voltage signal in relation to the artificial neutral point, are presented. The results of simulation tests were compared with the results of laboratory measurements. It was demonstrated that an FFT analysis of a voltage signal in relation to the artificial neutral point identifies a fault in a channel of the motor. When evaluating the characteristics of individual winding configurations, the value of electromagnetic torque, torque ripple, system efficiency, and emitted noise were taken into account. In the conclusions, the advantages of the combined star-delta winding compared to the traditional star and delta winding configurations are presented. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Fault-Tolerant Operation of Wound Field Synchronous Machine Using Coil Switching

Cited by 16 publications

References 23 publications

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

Brushless field‐excitation method for wound‐rotor synchronous machines

Frequency analysis in fault detection of dual‐channel BLDC motors with combined star–delta winding

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