Detecting Partial Demagnetization in AFPM Generators by Monitoring Speed and EMF Induced in a Supplemental Winding

Skarmoutsos, G. A.; Gyftakis, Konstantinos N.; Mueller, Markus

doi:10.1109/tii.2021.3053993

Cited by 16 publications

(5 citation statements)

References 32 publications

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“…16-b) against a speed transient is evidenced. This result validates the interest in speed normalization applied in (15) and ( 16) to dc quantities.…”

Section: Robustness Of the Proposed Rmd Fault Indexsupporting

confidence: 83%

“…Being normalized by the angular speed ω, the F 5 and F 7 indexes, expressed in (15) and (16), respectively, are independent of speed, which in turns leads to a complete immunity of the adopted fault index F dem against variable speed operating conditions. In Fig.…”

Section: Robustness Of the Proposed Rmd Fault Indexmentioning

confidence: 99%

“…In this sense, mechanical signals, such as shaft trajectory [13], and vibration analysis [14] have been successfully investigated. Electrical signal-based techniques have been proposed as potential alternatives, where motor current signature analysis (MCSA) [15], [16], [17], and voltage signature analysis (VSA) [15], [18], [19] have shown very interesting results. Magnetic flux analysis, using fluxgate sensors, has been proposed in [20], where leakage flux analysis has revealed more accurate and reliable results than those of back-emf (BEMF) and current analysis for detecting RMD.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Robust Online Magnet Demagnetization Diagnosis in Asymmetrical Six-Phase AC Permanent Magnet Motor Drives

et al. 2023

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Rotor magnets are critical components, which in case of fault, directly affect the performance of drives based on permanent magnet synchronous motors. Thus, monitoring the rotor magnets status is essential to ensure both high level of efficiency and service continuity. The present study focuses on the investigation of a new full-time domain-based method for the diagnosis of incipient rotor magnet demagnetization in a vector-controlled asymmetrical six-phase surface-mounted ac permanent magnet synchronous motor. The proposed strategy evaluates the rotor magnet demagnetization using a fault index derived from the control signals synthetized in the 5 th subspace, and already available in the control system platform. The main advantages of the proposed new strategy are its simplicity of implementation, and effectiveness even under time-varying operating conditions as the employed control signals in specific subspaces have a dc behavior. Extensive numerical simulations and experimental tests, carried out at different speed and load levels, have shown the validity of the proposed method, leading to an effective diagnostic procedure for a vector-controlled asymmetrical six-phase surface-mounted ac PMSM.

show abstract

“…16-b) against a speed transient is evidenced. This result validates the interest in speed normalization applied in (15) and ( 16) to dc quantities.…”

Section: Robustness Of the Proposed Rmd Fault Indexsupporting

confidence: 83%

Section: Robustness Of the Proposed Rmd Fault Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Robust Online Magnet Demagnetization Diagnosis in Asymmetrical Six-Phase AC Permanent Magnet Motor Drives

et al. 2023

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“…In the case of permanent magnets used in PMSM, irreversible demagnetization of the permanent magnet may occur due to armature reaction at high operating temperatures [37].…”

Section: Demagnetization Analsysmentioning

confidence: 99%

Optimal Design of an IPMSM for HEVs Using Circular Area Movement Optimization With the Pattern Search Method

Lee,

Park,

Lim

2024

IEEE Access

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“…The optimization algorithm of the magnet pole-arc ratio, 𝑑𝑑 𝑝𝑝 to minimize the cogging torque can be calculated by using formula that presented as (3).…”

Section: Pole-arc Ratio Designmentioning

confidence: 99%

Cogging torque reduction for permanent magnet structure of radial flux permanent magnet generator

Mostaman,

Sulaiman,

Jenal

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Recently, Permanent Magnet Generator has been widely used due to its ability of having simple structure yet high efficiency. A radial flux permanent magnet generator’s (RFPM) cogging torque leads to the decrease in output power. Generally, cogging torque is affected from the size of permanent magnet. This paper presents the techniques for cogging torque reduction and low torque ripple of RFPM design. This research used two methods to reduce the cogging torque which is the permanent magnet pole-arc ratio and also the permanent magnet structure. The cogging torque has been successfully reduced by increasing the permanent magnet pole-arc ratio and reducing the permanent magnet structure The best design configuration that can reduced the cogging torque by using pole-arc ratio is 0.49 pole-arc ratio which can reduce the cogging torque to 0.6986Nm. Moreover, for PM structure method 0.25 PM structure has been chosen as the best configuration since it can reduce the cogging torque to 0.2366Nm. This method able to reduce the cogging torque by 69.88%. Hence, both of these techniques are successfully reduced the cogging torque.

show abstract

Detecting Partial Demagnetization in AFPM Generators by Monitoring Speed and EMF Induced in a Supplemental Winding

Cited by 16 publications

References 32 publications

Robust Online Magnet Demagnetization Diagnosis in Asymmetrical Six-Phase AC Permanent Magnet Motor Drives

Robust Online Magnet Demagnetization Diagnosis in Asymmetrical Six-Phase AC Permanent Magnet Motor Drives

Optimal Design of an IPMSM for HEVs Using Circular Area Movement Optimization With the Pattern Search Method

Cogging torque reduction for permanent magnet structure of radial flux permanent magnet generator

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