Influence of Rotor Eccentricity on Vibration Characteristics of Permanent Magnet Synchronous Motor

Takahata, Ryoichi; Wakui, Shinichi; Miyata, Kenji; Noma, Keiji; Senoo, Makoto

doi:10.1541/ieejjia.8.558

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…2. It can be seen from the figure that when the carrier wave intersects with the modulation wave, the switching action time and switching on-off state of the bridge arm switching device of the inverter are determined by the intersection, and a series of positive and negative rectangular pulse voltage waveforms with different widths are obtained (Takahata et al, 2019). The pulse sequence is characterized by an equal amplitude and unequal width, and its width changes according to the sinusoidal law.…”

Section: Implementation Principle Of Spwmmentioning

confidence: 99%

A control strategy of a permanent magnet synchronous motor for an electric vehicle

Xie¹,

Liu²

2022

Journal of Theoretical and Applied Mechanics

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The traditional modulation method of the inverter in a permanent magnet synchronous motor (PMSM) is lengthy and computationally intensive. Based on this, a simplified sinusoidal pulse width modulation method is proposed. In this method, voltage space vectors in each sector are synthesized, and the sector in which the synthesized vector is located is determined by the rotation angle of the resultant vector, and then the acting time of the basic vector is calculated by the voltage difference of the phase voltage. The problem of trigonometric functions and coordinate conversion is not involved in the whole calculation process, the calculation model is simple, and it is easy to realize digitization. Mathematical modeling is carried out by using the simulation software MATLAB, and the correctness of the calculation method after optimization is verified, which provides an idea for the later research of the inverter modulation method.

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Section: Implementation Principle Of Spwmmentioning

confidence: 99%

A control strategy of a permanent magnet synchronous motor for an electric vehicle

Xie¹,

Liu²

2022

Journal of Theoretical and Applied Mechanics

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show abstract

“…The results showed that these indexes were grossly affected. Takahata and Wakui [25] employed the finite element method (FEM) to investigate the effect of rotor eccentricity on interior permanent magnet motor (IPMSM), it was concluded that IPMSM with rotor eccentricity caused an increase in radial electromotive force and higher vibration acceleration when compared with the healthy machine. The FEM is mostly used for modelling or validating other results.…”

Section: Introductionmentioning

confidence: 99%

Analysis and effect of static eccentricity fault on performance indicators of a synchronous reluctance motor

2024

Archives of Electrical Engineering

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Fault diagnosis and condition monitoring of synchronous machines running under load is a key determinant of their lifespan and performance. Faults such as broken rotor bars, bent shafts and bearing issues lead to eccentricity faults. These faults if not monitored may lead to repair, replacement and unforeseen loss of income. Researchers who attempted to investigate this kind of machine stopped at characterizing and deduced ways, types and effects of rotor eccentricity fault on the machine inductances using the winding function method. A modified closed-form analytical model of an eccentric synchronus reluctance motor (SynRM) is developed here taking into cognizance the machine dimensions and winding distribution for the cases of a healthy and unhealthy SynRM. This paper reports the study the SynRM under static rotor eccentricity using the developed analytical model and firming up the model with finite element method (FEM) solutions. These methods are beneficial as they investigated and presented the influence of the degrees of static eccentricity on the machine performance indicators such as speed, torque and the stator

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“…In general, an eccentricity ratio less than 10% is considered acceptable [1]. With a further increase of the eccentricity ratio, however, the unbalanced magnetic pull (UMP) also increases [2], resulting in the deterioration of the noise and vibration performance [3], [4]. Moreover, a severe eccentricity can even cause a fatal rotor-to-stator rub.…”

Section: Introductionmentioning

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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Influence of Rotor Eccentricity on Vibration Characteristics of Permanent Magnet Synchronous Motor

Cited by 9 publications

References 13 publications

A control strategy of a permanent magnet synchronous motor for an electric vehicle

A control strategy of a permanent magnet synchronous motor for an electric vehicle

Analysis and effect of static eccentricity fault on performance indicators of a synchronous reluctance motor

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

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