Torque Ripple Suppression Under Open-Phase Fault Conditions in a Five-Phase Induction Motor With Harmonic Injection

Liu, Haitao; Wang, Dong; Yi, Xinqiang; Meng, Fanqing

doi:10.1109/jestpe.2019.2952374

Cited by 24 publications

(24 citation statements)

References 29 publications

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“…On the other hand, although the variable u 0 + exists regardless of n, normally i 0 + is zero or negligible [8]. The latter is because for λ = 0 a single neutral point is considered (it gives better postfault performance [6], [9], [33]), machine space harmonics [2], [11], [55] are neglected, and it is assumed that i 0 + is not necessary for healthy operation (unlike, e.g, in some special machines [49]). Asymmetrical winding arrangements are not included in the analysis to avoid excessive length and because their postfault performance is inferior to symmetrical ones [9], [25].…”

Section: A Vector Space Decompositionmentioning

confidence: 99%

“…normalized with respect to rated healthy operation (from now on, simply "normalized"), i.e., divided by |i rc αβ1 | = i rc [8]- [11]. Since the machine torque depends on |i αβ1 |, 2 the DF is closely related to the MAT; for certain machine, higher DF also implies higher MAT [8]- [11]. Nevertheless, the DF is more general than the MAT in the sense that it does not depend on the machine type (induction, permanent-magnet, etc.…”

Section: B Derating Factor and Maximum Achievable Torquementioning

confidence: 99%

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Study and Active Enhancement by Converter Reconfiguration of the Performance in Terms of Stator Copper Loss, Derating Factor and Converter Rating of Multiphase Drives Under Two Open Legs With Different Stator Winding Connections

Yepes

Doval-Gandoy

2021

IEEE Access

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Multiphase machines offer inherent tolerance to faults such as open converter legs (OCLs), which are especially frequent. Because of this reason, they are particularly attractive for applications where fault tolerance is important, such as offshore wind energy or aerospace, naval and military vehicles. It has been previously shown that, under an OCL, certain stator winding configurations (SWCs) different from star yield smaller stator copper loss (SCL) and larger maximum achievable torque (MAT) than star SWC for the same torque command and machine. This advantage comes just at the expense of a moderate increase in converter rating. However, only the case of single OCL was studied in general. The SCL, MAT and required converter rating for two OCLs are currently unknown for different combinations of phase number, faulted legs and SWCs. Actually, under two OCLs (unlike for one OCL) it may be possible to actively modify the order of the faulted/healthy legs to enhance the performance in these terms, but this possibility has not been studied so far in spite of its potential. This paper addresses the postfault performance of multiphase drives with two OCLs, for various SWCs. The MAT (derating factor), SCL and necessary converter rating are assessed in numerous possible scenarios. The most convenient alternatives are established. Most importantly, in view of the conclusions of this analysis, a novel method is proposed to improve substantially the MAT and SCL by actively altering the connections between the converter and machine terminals. Experimental results with six-phase and twelve-phase setups are provided. INDEX TERMSDerating factors (DFs), fault-tolerant, five-phase, minimum copper losses, multiphase drives, six-phase, stator winding configuration (SWC), twelve-phase, symmetrical, variable speed drives. ACRONYMS DF Derating factor. FRMLS Full-range minimum-loss strategy. MAT Maximum achievable torque. OCL Open converter leg. SCL Stator copper loss. SWC Stator winding configuration. VSD Vector space decomposition. VARIABLES λ Denotes an SWC based on series connection of each pair of phases with λγ spatial step between them.

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Section: A Vector Space Decompositionmentioning

confidence: 99%

Section: B Derating Factor and Maximum Achievable Torquementioning

confidence: 99%

Study and Active Enhancement by Converter Reconfiguration of the Performance in Terms of Stator Copper Loss, Derating Factor and Converter Rating of Multiphase Drives Under Two Open Legs With Different Stator Winding Connections

Yepes

Doval-Gandoy

2021

IEEE Access

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“…I is kept constant based on the stator MMF invariance. Combining the constraint in (17), two zero torque ripple solutions can be deduced. The first solution is same with the conventional minimum torque ripple strategy in (23)…”

Section: B Proposed Minimum Torque Ripple Strategy Under Sigle-phasementioning

confidence: 99%

“…The MMF-based methods do not depend on the motor model, and the current commands are required to ensure the invariance of the stator MMF [17][18]. With this constraint, there are four different fault tolerant control strategies, e.g., the maximum torque strategy [19][20], the minimum copper loss strategy [21][22], the best flux distribution strategy [23][24], and the minimum torque ripple strategy [17,[25][26]. Specifically, the torque ripple needs to be minimized in the drive train and marine propulsion, because the highmagnitude torque ripple yields serious vibration and acoustic noise which, in turn, affect their lifetime [27][28].…”

Section: Introductionmentioning

confidence: 99%

“…In the heathy case under fundamental power supply, only the fundamental MMF exists and it moves along the circular trajectory. In the open-phase faults case, the third harmonic MMFs appear which rotate at ±ω/3, and the interaction between the fundamental MMF and third harmonic MMFs leads to the torque ripple [17]. Therefore, the conventional minimum torque ripple strategy makes the fundamental current space vector to move along the circular trajectory in order to eliminate the coupling [26].…”

Section: Introductionmentioning

confidence: 99%

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Torque Ripple Minimization of a Five-Phase Induction Motor Under Open-Phase Faults Using Symmetrical Components

Sui

Liu

et al. 2020

IEEE Access

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Speed Sensorless Control System of Five‐Phase Induction Motor Based on Linear Active Disturbance Rejection Control and Adaptive Full‐Order Observer

Luo,

Zhao,

Xiong

et al. 2024

IEEJ Transactions Elec Engng

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As the simplest type of multi‐phase induction motor, the five‐phase induction motor is suitable for applications that require high power and reliability due to its advantages such as low noise, low torque ripple, and strong load capacity. To address the problem that the speed encoder is easily affected by external environmental interference, a speed sensorless vector control strategy combining linear active disturbance rejection control and adaptive full‐order observer is proposed. Compared with the traditional speed sensorless vector control strategy, this paper's proposed method designs three first‐order linear active disturbance rejection controllers instead of traditional proportional‐integral controllers for speed control. Experimental results show that the proposed strategy exhibits stronger anti‐interference ability under load disturbance, improving the overall robustness of the speed sensorless control system. © 2024 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

show abstract

Torque Ripple Suppression Under Open-Phase Fault Conditions in a Five-Phase Induction Motor With Harmonic Injection

Cited by 24 publications

References 29 publications

Study and Active Enhancement by Converter Reconfiguration of the Performance in Terms of Stator Copper Loss, Derating Factor and Converter Rating of Multiphase Drives Under Two Open Legs With Different Stator Winding Connections

Study and Active Enhancement by Converter Reconfiguration of the Performance in Terms of Stator Copper Loss, Derating Factor and Converter Rating of Multiphase Drives Under Two Open Legs With Different Stator Winding Connections

Torque Ripple Minimization of a Five-Phase Induction Motor Under Open-Phase Faults Using Symmetrical Components

Speed Sensorless Control System of Five‐Phase Induction Motor Based on Linear Active Disturbance Rejection Control and Adaptive Full‐Order Observer

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