Thermal Analysis of a Directly Grid-Fed Induction Machine With Floating Neutral Point, Operating Under Unbalanced Voltage Conditions

Santiago, Fabio; Bento, Fernando; Cardoso, António J. Marques; Gyftakis, Konstantinos N.

doi:10.1080/15325008.2019.1659451

Cited by 1 publication

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To reproduce the phenomenon of heat transfer through radiation, the emissivity and absorption coefficient of the IM stator frame is defined at 0.95. Please note that the simulation model based on the FEM presented in this study was subjected to experimental validation in another study of the same authors [33]. In particular, the effectiveness of the thermal model based on the FEM was confirmed for the operation of the motor under healthy conditions.…”

Section: Thermal Simulationmentioning

confidence: 70%

See 1 more Smart Citation

On the risk of failure to prevent induction motors permanent damage, due to the short available time‐to‐diagnosis of inter‐turn short‐circuit faults

Bento

Abbadi

Muxiri

et al. 2020

IET Electric Power Appl

Self Cite

View full text Add to dashboard Cite

As one of the most important assets of the industry, it is crucial to fully characterise all failure modes showing potential to degrade the normal operation of induction motors (IMs). One of the failure modes which lacks detailed knowledge and proper diagnostic tools is the inter‐turn short‐circuit (SC) fault. Given the severity of such failure mode, it is pivotal to ensure that incipient fault symptoms are correctly identified, thus preventing critical damages to the IM. Unfortunately, the state‐of‐the‐art does not provide enough data to confirm whether the available diagnostic tools act out in due time to avoid permanent damage to the faulty IM. To evaluate the impacts of this failure mode in the temperature of the stator windings of an IM, this paper presents the results obtained from two alternative thermal models of the same IM, resorting to the lumped parameter thermal network method and to the finite elements method. The results confirm that diagnostic tools reported in the literature might not be effective, failing to correctly diagnose an inter‐turn SC fault and to warrant the lead time required to take actions suitable to prevent permanent damage to the IM.

show abstract

Section: Thermal Simulationmentioning

confidence: 70%

“…Please note that the simulation model based on the FEM presented in this study was subjected to experimental validation in another study of the same authors [33]. In particular, the effectiveness of the thermal model based on the FEM was confirmed for the operation of the motor under healthy conditions.…”

Section: Finite Elements Modelmentioning

confidence: 71%