General Analytical Model of Magnet Average Eddy-Current Volume Losses for Comparison of Multiphase PM Machines With Concentrated Winding

Aslan, Bassel; Semail, Eric; Legranger, J.

doi:10.1109/tec.2013.2292797

Cited by 61 publications

(66 citation statements)

References 22 publications

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“…max( s FD  (18) According to (18), the faulty phase has the highest s value among others. Then faulty switch in the faulty leg can be determined from the sign of s as follows: y e s S 5 > 0 i c =0 yes S 6 < 0 i c =0 yes S 5 S 6 y e s S 7 > 0 i d =0 yes S 8 < 0 i d =0 yes S 7 S 8 y e s S 9 > 0 i e =0 yes S 10 < 0 i e =0 yes S 9 S 10 y e s S 1 < 0 i a ≠0 yes S 2 > 0 i a ≠0 yes S 3 < 0 i b ≠0 yes S 4 > 0 i b ≠0 yes S 5 < 0 i c ≠0 yes S 6 > 0 i c ≠0 yes S 7 < 0 i d ≠0 yes S 8 > 0 i d ≠0 yes S 9 < 0 i e ≠0 yes S 10 >…”

Section: Fault Diagnostic Methodsmentioning

confidence: 99%

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Simplified fault tolerant finite control set model predictive control of a five-phase inverter supplying BLDC motor in electric vehicle drive

Salehifar

Moreno-Eguilaz²,

Putrus

et al. 2016

Electric Power Systems Research

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Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) Abstract -Multiphase brushless direct current (BLDC) motors can meet the increasing demand for higher reliability in motor drives applicable in electric vehicles by integrating fault diagnosis to a faulttolerant (FT) control method. To achieve this goal, a modified FT finite control set model predictive control (FCS-MPC) is proposed in this paper. The dead beat control is used to predict the reference voltage applied by the inverter. A sensitivity analysis is done to show the effect of model uncertainty on the controller performance. In addition, a simple, fast and general open switch and short circuit fault detection (FD) method in voltage source inverter (VSI) is presented. The FD method is capable of detecting open switch, open phase, and short circuit faults without any auxiliary variable. Moreover, it is robust to both speed and load transients in a motor drive. To validate the presented theory, experimental results are conducted on a five-phase BLDC motor drive with outer rotor in wheel structure.

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Section: Fault Diagnostic Methodsmentioning

confidence: 99%

“…More electric aircraft, renewable energy, and transportation are other application areas for FT drives. Regarding motor drives applicable in electric and hybrid electric vehicles, multiphase BLDC motors can achieve high reliability due to their FT capability [2], [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Simplified fault tolerant finite control set model predictive control of a five-phase inverter supplying BLDC motor in electric vehicle drive

Salehifar

Moreno-Eguilaz²,

Putrus

et al. 2016

Electric Power Systems Research

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“…According to References [4,34], it can be found that for FSCWs, the most harmful MMF harmonics are those which are close to the fundamental harmonic (also called the synchronous harmonic in Reference [4]). Here, for a 5-pole-pair FSCW machine, the most harmful MMF harmonics will be the 1st and 7th harmonics, knowing that the fundamental harmonic is the fifth harmonic.…”

Section: Winding Configurations and Mmf Analysismentioning

confidence: 99%

Influence of Stator MMF Harmonics on the Utilization of Reluctance Torque in Six-Phase PMA-SynRM with FSCW

et al. 2018

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Abstract:Although fractional-slot concentrated winding (FSCW) offers many significant advantages, such as short end-turn windings, high slot filling factor, and low cogging torque, it is frequently limited by excessive stator magnetomotive force (MMF) harmonics which will induce high eddy losses in the permanent magnets (PMs). What is more, in the literature, it can be observed that the reluctance torque of the salient-pole machine with FSCW is usually much lower than that obtained with integral slot winding. To explore the underlying reason why the reluctance torque in a salient machine with FSCW significantly decreases, a new six-phase FSCW with 24 slots and 10 poles, which can significantly reduce the undesirable stator MMF harmonics, is obtained by using the concept of stator shifting. Then, two permanent-magnet-assisted synchronous reluctance machines (PMA-SynRMs) with the proposed winding layout and conventional asymmetric 12-slot/10-pole six-phase winding layout are designed and simulated by the finite-element method (FEM). The reluctance torque, total torque, and d/q-axis inductances with different current phase angles are also compared under different loaded conditions. The results show that a reduction in stator MMF harmonics can indeed lead to a significant enhancement in reluctance torque under heavy loaded conditions, while the dominance will diminish under light loaded conditions.

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“…The impacts of slot/pole combinations on eddycurrent losses of PMs are analyzed, and single-layer FSCW leads to more rotor losses than double-layer FSCW. 7,8 For the double-layer FSCW, its magnetic isolation ability is poorer than that of the single-layer FSCW.Recently, modular-structure machines are increasingly investigated due to their characteristics of increased faulttolerant ability and simplified manufacturing process. 9,10 For multiphase fault-tolerant PM machines, if the phase failure involves only a part of the machine, the fault part can be replaced by a healthy module, which leads to easy maintenance.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

A novel five-phase fault-tolerant modular in-wheel permanent-magnet synchronous machine for electric vehicles

Sui

Zheng

et al. 2015

Journal of Applied Physics

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This paper describes a five-phase fault-tolerant modular in-wheel permanent-magnet synchronous machine (PMSM) for electric vehicles. By adopting both the analytical and finite-element methods, the magnetic isolation abilities of some typical slot/pole combinations are analyzed, and a new fractional-slot concentrated winding topology that features hybrid single/double-layer concentrated windings and modular stator structure is developed. For the proposed hybrid single/double-layer concentrated windings, feasible slot/pole combinations are studied for three-, four-, and five-phase PMSMs. A five-phase in-wheel PMSM that adopts the proposed winding topology is designed and compared with the conventional PMSM, and the proposed machine shows advantages of large output torque, zero mutual inductances, low short-circuit current, and high magnetic isolation ability. Some of the analysis results are verified by experiments. V C 2015 AIP Publishing LLC. With the increasing aggravation of energy crisis and air pollution, electric vehicles (EVs) have drawn wide interests in recent years. Owing to the elimination of mechanical gearboxes, in-wheel direct-drive system enables higher system efficiency and better control of EVs. 1,2 Since the in-wheel electric drive system is the only power source for pure EVs, so continuous operation after faults is very important. Multiphase permanent-magnet (PM) machine that features advantages of high power density and high reliability is promising for in-wheel direct-drive systems. [3][4][5][6] Fractional-slot concentrated windings (FSCWs) are widely adopted for fault-tolerant PM synchronous machines (PMSMs). However, FSCW introduces many space harmonics in the air gap, which takes negative effects on machine performance. The impacts of slot/pole combinations on eddycurrent losses of PMs are analyzed, and single-layer FSCW leads to more rotor losses than double-layer FSCW. 7,8 For the double-layer FSCW, its magnetic isolation ability is poorer than that of the single-layer FSCW.Recently, modular-structure machines are increasingly investigated due to their characteristics of increased faulttolerant ability and simplified manufacturing process. 9,10 For multiphase fault-tolerant PM machines, if the phase failure involves only a part of the machine, the fault part can be replaced by a healthy module, which leads to easy maintenance. Three-phase modular PM machine that features single-layer FSCW is reported. 11 Herein, we report a novel five-phase fault-tolerant PMSM, characterized as hybrid single/double-layer windings, modular stator structure, and high magnetic isolation.Five-phase PMSMs with FSCWs have been developed. 12 The investigated machines include a 20-slot/18-pole PMSM with single-layer FSCW, a 20-slot/18-pole PMSM with double-layer FSCW, and a 30-slot/28-pole PMSM with double-layer FSCW, as shown in Fig. 1. The magnetic isolation ability is investigated by finite-element method (FEM). With PMs removed and only one phase winding activated, the flux distributions are calculated by FE...

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General Analytical Model of Magnet Average Eddy-Current Volume Losses for Comparison of Multiphase PM Machines With Concentrated Winding

Abstract: is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.

Cited by 61 publications

References 22 publications

Simplified fault tolerant finite control set model predictive control of a five-phase inverter supplying BLDC motor in electric vehicle drive

Simplified fault tolerant finite control set model predictive control of a five-phase inverter supplying BLDC motor in electric vehicle drive

Influence of Stator MMF Harmonics on the Utilization of Reluctance Torque in Six-Phase PMA-SynRM with FSCW

A novel five-phase fault-tolerant modular in-wheel permanent-magnet synchronous machine for electric vehicles

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