Eccentric position diagnosis of static eccentricity fault of external rotor permanent magnet synchronous motor as an in‐wheel motor

Ma, Chunfeng; Gao, Yujiao; Wang, Yanyan; Fang, Jianguang; Gerada, Christopher; Zhou, Shengsen; Mu, Yuanye

doi:10.1049/iet-epa.2019.0617

Cited by 12 publications

(7 citation statements)

References 31 publications

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“…As the motor continues to operate over a longer time, the localized overheating accelerates the aging of local insulation and may cause a short circuit fault. As for the diagnosis of motor eccentricity and its influence, many researchers have conducted in‐depth studies [11–13], but solutions have not been proposed for the local overheating caused by eccentricity.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Modular Permanent Magnet Fault‐Tolerant Motor for Ship Direct‐Drive Propulsion

Gan

Zhang

Guo

2021

IEEJ Transactions Elec Engng

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In the field of ship propulsion, highly reliable propulsion motor is one of the key factors for the stable operation of the drive system. This paper proposes a new modular stator low‐speed high‐torque fault‐tolerant permanent magnet motor (MCS‐PMFTSM) for the direct‐drive ship propulsion system. The unequal‐span winding is used for enhanced fault‐tolerant as well as modular operation of the motor. Each module is isolated electrically and mechanically, while the maintenance procedure is greatly simplified by the structure that uses external radiation installation. Introducing the new structure and operating principle of the MCS‐PMFTSM, the basic size equation of the motor is derived followed by the analysis for the selection of the number of poles and slots. The rotor structure of the motor is then optimized using the genetic algorithm. The finite element method is used to analyze the motor performance under normal and various fault‐tolerant conditions. In addition, the electromagnetic vibration of the proposed motor is also examined under different operating conditions. Finally, a 12 kW 100 r/min 3 × 3 modular prototype is developed to experimentally validate the excellent performance of the proposed motor under both normal and fault‐tolerant operating conditions. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of Modular Permanent Magnet Fault‐Tolerant Motor for Ship Direct‐Drive Propulsion

Gan

Zhang

Guo

2021

IEEJ Transactions Elec Engng

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“…To diagnose the eccentricity of these IPMSMs by using stator current or back EMF, more instrumentation and complicated algorithms for signal processing are required [17]- [19]. Targeting this problem, Ma et al [20] proposed a diagnostic method that only used fast Fourier transform (FFT) and the back EMF of each unit motor. Effective as this method is, additional cabling is required to connect windings of each unit motor to a data acquisition system, which makes this method again invasive.…”

Section: Statormentioning

confidence: 99%

Open-Circuit Radial Stray Magnetic Flux Density Based Noninvasive Diagnosis for Mixed Eccentricity Parameters of Interior Permanent Magnet Synchronous Motors in Electric Vehicles

Zhang

et al. 2023

IEEE Trans. Ind. Electron.

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By measuring the open-circuit radial stray magnetic flux density (RSMFD) of three spatial points, a novel diagnostic method for the eccentricity of interior permanent magnetic motors (IPMSMs) in electric vehicles (EVs) is proposed. Outperforming traditional methods, the proposed method can non-invasively diagnose not only the severities of static eccentricity (SE), dynamic eccentricity (DE), and mixed eccentricity (ME), but also the eccentricity location. In this paper, diagnosis results are described through three eccentricity parameters: SE ratio, DE ratio, and SE angle. Firstly, an analytical model of the open-circuit RSMFD of the IPMSM is proposed, with its accuracy validated by experiments. The pattern of the impact of the eccentricity parameters on the open-circuit RSMFD is analyzed to form the basis of the proposed method. Then, an eccentricity prototype motor, which can continuously emulate the eccentricity according to any listed eccentricity parameters, is developed. A test rig is built to collect the open-circuit RSMFD and validate the analytical calculation results. Finally, an eccentricity diagnostic model based on the open-circuit RSMFD is established. The diagnosis results proved the non-invasiveness, effectiveness, and viability of the proposed method.

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“…In recent years, external rotor permanent magnet synchronous motors (ER-PMSMs) mounted directly in the wheels of vehicles has been one of the trends in drive systems employed in hybrid and electrical vehicle (HEV) powertrains. The design of this type of motor presents a challenge, as it must be characterized by high durability and energy efficiency [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling, Analysis and Diagnosis of External Rotor PMSM with Stator Winding Unbalance Fault

et al. 2023

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Multiple factors and consequences may lead to a stator winding fault in an external rotor permanent magnet synchronous motor that can unleash a complete system shutdown and impair performance and motor reliability. This type of fault causes disturbances in operation if it is not recognized and detected in time, since it might lead to catastrophic consequences. In particular, an external rotor permanent magnet synchronous motor has disadvantages in terms of fault tolerance. Consequently, the distribution of the air-gap flux density will no longer be uniform, producing fault harmonics. However, a crucial step of diagnosis and controlling the system condition is to develop an accurate model of the machine with a lack of turns in the stator winding. This paper presents an analytical model of the stator winding unbalance fault represented by lack of turns. Here, mathematical approaches are used by introducing a stator winding parameter for the analytical modeling of the faulty machine. This model can be employed to determine the various quantities of the machine under different fault levels, including the magnetomotive force, the flux density in the air-gap, the flux generated by the stator winding, the stator inductances, and the electromagnetic torque. On this basis, a corresponding link between the fault level and its signature is established. The feasibility and efficiency of the analytical approach are validated by finite element analysis and experimental implementation.

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Eccentric position diagnosis of static eccentricity fault of external rotor permanent magnet synchronous motor as an in‐wheel motor

Cited by 12 publications

References 31 publications

Design and Analysis of Modular Permanent Magnet Fault‐Tolerant Motor for Ship Direct‐Drive Propulsion

Design and Analysis of Modular Permanent Magnet Fault‐Tolerant Motor for Ship Direct‐Drive Propulsion

Open-Circuit Radial Stray Magnetic Flux Density Based Noninvasive Diagnosis for Mixed Eccentricity Parameters of Interior Permanent Magnet Synchronous Motors in Electric Vehicles

Analytical Modeling, Analysis and Diagnosis of External Rotor PMSM with Stator Winding Unbalance Fault

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