Position error calculation of linear resolver under mechanical fault conditions

Daniar, Ahmad; Nasiri‐Gheidari, Zahra; Tootoonchian, F.

doi:10.1049/iet-smt.2017.0063

Cited by 37 publications

(6 citation statements)

References 17 publications

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“…The first type has a Variable Reluctance (VR) structure [6], [9], where the windings are located on the mover, and the stator is designed based on the sinusoidal air-gap permeances. The second type is designed based on the slots/teeth stator structure, where the windings are placed on both mover and stator [10]- [13]. However, an additional structure is proposed in [14], where slotted and sinusoidal area solid cores are used.…”

Section: Introductionmentioning

confidence: 99%

A Novel Linear Resolver Proposal and Its Performance Analysis Under Healthy and Asymmetry Air-Gap Fault

Naderi

Ramezannezhad

Vandevelde

2022

IEEE Trans. Instrum. Meas.

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A novel linear resolver is proposed in this paper. The excitation and signals windings are placed on the mover, and the stator structure is designed by a certain number of teeth/slots per the mover length. Therefore, the proposed structure is more simple compared to other resolver types and causes a low price structure. A flexible Magnetic Equivalent Circuit (MEC) is used for analysis thanks to its capability, introducing various structures. The resolver performance under healthy and faulty cases is evaluated, where the position error under asymmetry air-gap fault is obtained. Performed analysis shows that the proposed resolver has less than 100 µm position error. Hence it can be a proper alternative as an accurate position sensor. The simple structure and high-accurate position estimation are the advantages of the proposed resolver compared to other types. Finally, the effectiveness of the proposed resolver is validated by experimental results.

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Section: Introductionmentioning

confidence: 99%

A Novel Linear Resolver Proposal and Its Performance Analysis Under Healthy and Asymmetry Air-Gap Fault

Naderi

Ramezannezhad

Vandevelde

2022

IEEE Trans. Instrum. Meas.

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“…However, this fault is the counterpart of the eccentricity fault in the rotating electrical machines. Electromagnetic variations of the SLIM under asymmetrical conditions have been studied in [14, 15] using finite element method (FEM). In these cases, the impact of the primary lateral movement and its effect on the applied forces on the primary, caused by the asymmetry, is as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…It has been claimed that the primary lateral movement decreases the trust force, increases the normal force and generates lateral force. Although the impact of the primary lateral movement on the forces and performance of the SLIM have been investigated in [14, 15], such fault has not been diagnosed. The impact of the air gap asymmetry on the primary applied force is studied and a fault diagnosis index is introduced.…”

Section: Introductionmentioning

confidence: 99%

Dynamic air gap asymmetry fault detection in single‐sided linear induction motors

Faiz

Ghods

Tajdyni

2020

IET Electric Power Applications

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Single-sided linear induction motors (SLIMs) are used in maglev levitation systems for propelling purpose. The reasons for such usages are their capability in direct drive applications with very good dynamic performance, high reliability and high flexibility in trajectory generation. High-performance requirements of the machine demand a high saliency ratio resulting in small air gap length along the direct axis. Therefore, the air gap symmetry in the primary side and consequently the air gap asymmetry fault diagnosis is essential for the system maintenance. In this study, the air gap asymmetry fault in a SLIM is diagnosed. Since the precise definition of the air gap asymmetry fault and fault severity has not been so far introduced in the relevant literature, they are given here. The proposed fault index is the amplitude of the sideband components of the current with a particular frequency pattern. First, mathematical analysis of magnetic field is proposed, then, fast Fourier transform is applied to the current waveform in the SLIM. The spectrum of the SLIM current in the healthy and faulty cases under different loads is obtained. Time-stepping finite element method is applied to simulate the healthy and faulty motor. Experimental results are verified by the introduced theoretical index.

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“…Accordingly, this paper sets forth the accuracy improvement of 2-pole WR resolvers. There are lots of works on performance improvement of WR resolvers [16]- [23]. In [17] the effect of physical parameters of a disk type WR resolver on its accuracy is discussed.…”

Section: Introductionmentioning

confidence: 99%

Optimal Winding Selection for Wound-Rotor Resolvers

et al. 2019

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Wound-rotor (WR) resolvers are the most commercially used resolvers in industrial applications. In this paper, the effect of different winding arrangements on the accuracy of WR resolvers is discussed. Three windings are proposed for the stator of the resolver that are involved on-tooth overlapping winding, distributed lap winding and distributed concentric winding. Those windings are also applied to the rotor. All the rotor windings are assumed to be single phase and two-phase. Therefore, the effect of damper winding is also studied in the paper. The analysis is done using time stepping finite element method and the most accurate resolver is built and tested. Close agreement between the experimental measurements and the finite element results confirms the obtained results.

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Position error calculation of linear resolver under mechanical fault conditions

Cited by 37 publications

References 17 publications

A Novel Linear Resolver Proposal and Its Performance Analysis Under Healthy and Asymmetry Air-Gap Fault

A Novel Linear Resolver Proposal and Its Performance Analysis Under Healthy and Asymmetry Air-Gap Fault

Dynamic air gap asymmetry fault detection in single‐sided linear induction motors

Optimal Winding Selection for Wound-Rotor Resolvers

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