Comparison of the reluctance laminated and solid rotor synchronous machine operating at high temperatures

Lefik, M.; Komęza, Krzysztof; Napieralska‐Juszczak, Ewa; Roger, Daniel; Napieralski, Piotr

doi:10.1108/compel-10-2018-0405

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…Web-based implementation of the solution would facilitate multi-platform operation, as well as broaden the potential for data exploration through crowdsourcing [ 56 , 57 ]. Moreover, as reported in Section 5.4 there exists potential for systematic investigation of rare phenomena occurring during industrial flows as well as in other areas such as temperature field control [ 54 , 58 , 59 ]. We noticed that experts employed different yet, convergent patterns of workflow in the course of analysis of the experimental scenario datasets.…”

Section: Results and Discussionmentioning

confidence: 99%

Interactive Timeline Approach for Contextual Spatio-Temporal ECT Data Investigation

Romanowski

Chaniecki

Koralczyk

et al. 2020

Sensors

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This paper presents a novel approach to a complex process of electrical capacitance tomography (ECT) measurement data analysis. ECT is frequently employed for non-invasive monitoring of industrial process phenomena. Proposed methodology is based on the premeditated integration of the spatial and temporal relations inherent in the measurement records into the workflow of the analysis procedure. We propose a concept of interactive timeline that enables arranging data visualization according to the user’s current focus along the process of analysis. We evaluated the proposed method using a prototype system in a task-based user study conducted with a group of domain experts. The evaluation is based on gravitational silo flow measurement datasets. Proposed prototype system enables diverse data manipulation in a more natural way allowing the user to switch back and forth between space and time domains along the data analysis trail. Experiments with the prototype system showed that the accuracy and completion times have significantly improved in comparison to the performance measured in the baseline condition. Additionally, the participants reported decreased physical load with improved efficiency measured with NASA task load index. Finally, a short discussion coupled with directions for the future of interactive spatio-temporal ECT measurement data analysis conclude the paper.

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Section: Results and Discussionmentioning

confidence: 99%

Interactive Timeline Approach for Contextual Spatio-Temporal ECT Data Investigation

Romanowski

Chaniecki

Koralczyk

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…The issue of finding alternative solutions to replace organic insulating materials that cannot withstand hot operating conditions is relevant. In the studies of M. Lefik et al (2019) (2020) performed a comparative analysis of the laminated and solid rotor of a synchronous machine operating at high temperatures using windings made of inorganic materials. The study also presents the application of three-dimensional combined electromagnetic and thermal analysis of new machine designs designed for elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

A study of electrothermomechanical converter for technological purposes with nonlinear changes in the loading and cooling medium

Mudryk,

Hutsol,

Zablodskiy

et al. 2023

Tehnìka ta energetika

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Heavy temperature processes with high-temperature loads require optimisation of technological processes, ensuring high reliability and combining rotating parts of electric machines with actuators to achieve greater efficiency of electromechanical converters. The research aims to provide a theoretical justification and experimental confirmation of the effect of higher harmonics in the air gap under nonlinear changes in the temperature of the medium. The research is based on the basic principles of electrodynamics, heat and mass transfer, mathematical modelling by the finite element method, and experimental verification of multi-physical parameters. Based on the analysis of the differential equation for determining the increase in the surface temperature of a ferromagnetic rotor under conditions of nonlinear temperature changes in the environment surrounding the electromechanical converter, the regularities of the formation of the free and forced components of the instantaneous temperature values of the massive rotor are established. Depending on the mode of interaction between the load-cooling medium and the electromechanical part of the screw units, kinematic diagrams of single-mass and two-mass systems with variable or constant moments of inertia and stiffness were formed. According to the size of the electromagnetic system of the experimental sample, a mathematical model for studying thermal and electromagnetic processes was built. The regularities of the spatial distribution of the temperature of the screw electromechanical unit are determined. The spectra of higher harmonics of voltage and current in the frequency range from 0 to 50 kHz have been experimentally determined, which confirms the presence of the effect of generating higher harmonics when the temperature of the medium surrounding the rotor screw changes. The detected harmonic spectrum affects both the formation of the dynamics of the rotating system and additional thermal power while increasing the overall efficiency of the screw electromechanical converter. The practical value of the obtained results lies in the possibility of predicting the optimal indicators of interrelated electromagnetic and heat exchange processes in screw electromechanical converters for technological purposes

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High-power density induction machines with increased windings temperature

et al. 2020

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The increase of the operating temperature of electrical machines is a major challenge in the context of the large-scale use of electricity in many industrial or individual applications such as mobility. Indeed, working at higher temperatures makes it possible to place electrical actuators in critical areas – such as aircraft engines, for example – and/or to significantly improve the power-to-weight ratio of the machine. For several applications (deep pumping, ventilation, etc.), the use of the induction machine is still preferred due to cost, simplicity and robustness essentially. The objective of this study is to estimate the possibilities of making a high-temperature squirrel cage induction machine. A significant increase in the operating temperature of a machine would indirectly allow us to envisage an increase in the current density in the active conductors and thus a significant improvement in the power-to-weight ratio. However, this is at the sacrifice of efficiency. The aim of this study is to evaluate this decrease in efficiency correlated with the increase in the temperature to find the best compromise according to the relevant applications. An analytic sizing model has been proposed for the prediction of losses, which will be coupled with a thermal model to predict the temperature in different parts of the machine. This study presents essential information on the influence of temperature on the parameters important for the performance of an induction machine.

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Comparison of the reluctance laminated and solid rotor synchronous machine operating at high temperatures

Cited by 4 publications

References 20 publications

Interactive Timeline Approach for Contextual Spatio-Temporal ECT Data Investigation

Interactive Timeline Approach for Contextual Spatio-Temporal ECT Data Investigation

A study of electrothermomechanical converter for technological purposes with nonlinear changes in the loading and cooling medium

High-power density induction machines with increased windings temperature

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