A coupled field-circuit approach to 3D FEM analysis of electromechanical devices

Canova, Aldo; Ottella, Marco; Rodger, D.

doi:10.1049/cp:19990993

Cited by 13 publications

(5 citation statements)

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“…Various authors have already carried out the coupling between FEM and external circuit for conventional systems [ 68 , 69 , 70 ]. These systems rely on typical conductors such as Cu and/or Al to transmit the current assuming constant material properties.…”

Section: Modeling Based On Finite Element Methodsmentioning

confidence: 99%

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

2021

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The manufacturing of commercial REBCO tapes, REBCO referring to Rare-earth barium copper oxide, has matured enough to lead to a variety of applications ranging from scientific instruments to electric power systems. In particular, its large current density with a high n index and low hysteresis losses make it a strong candidate for specific applications relying on the dependence of its resistance on current. Despite its advantages, there are still issues that remain to be addressed, such as the scarcity of experimental data for the basic characteristics of the superconductor over a wide range of temperature and applied magnetic field, the homogeneity of these characteristics along the conductor length, as well as the anisotropy of the critical current and n index with respect to the direction of the applied magnetic field. To better utilize the technology, it is therefore sensible to understand the relevancy of these issues so that one could simulate as accurately as possible the physics of the superconductor, at least the dynamics that may impact the correct operation of the superconducting device. There are different levels of modelling to achieve such a goal that can either focus on the performance of the superconductor itself, or on the whole device. The present work addresses some of the latest developments in the modelling of commercial REBCO tapes in power systems with a particular focus on the thermoelectric behavior of superconducting devices connected to external circuits. Two very different approaches corresponding to two different scales in the modelling of superconducting devices are presented: (1) analysis using equivalent models and lumped parameters to study the thermoelectric response of superconducting devices as a whole, (2) Finite Element Analysis (FEA) to compute distributed fields such as current density, magnetic flux density and local losses in tapes. In this context, this paper reviews both approaches and gives a broad variety of examples to show their practical applications in electric power systems. Firstly, they show the relevance of the technology in power systems engineering. Secondly, they allow inferring the necessary level of model details to optimize the operation of superconducting power devices in power grids. This level of details relies completely on the knowledge of some basic measurable properties of superconducting tapes (critical current and n index) and their cooling conditions.

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Section: Modeling Based On Finite Element Methodsmentioning

confidence: 99%

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

2021

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“…The motion equation of the mover is expressed in equation (6). Equation (7) can be derived by summation of the thrust by the current and equation (6).…”

Section: Figure 2 Thrust Generation Of the Solenoidmentioning

confidence: 99%

Advanced Linear Proportional Control of a Pressure Valve for an Electric Pressure Cooker

Woo

Kim²

2014

IJCA

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This paper describes the advanced control of solenoid for pressure valve for electric pressure cooker. To remove the problem of the on/off non-proportional pressure control method which was used to control the existing solenoid, newly redesigned solenoid was adopted and the advanced control method, linear proportional control method, was proposed. The control system by the pressure sensor and AVR was manufactured and its validation was proved through the experiment.

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“…As a second stage, detailed analyses to determine maximum efficiency have been performed at a rated wind speed of 5 m/s by means of strongly coupled mechanical-field-circuit simulations [13] using Matlab/Simulink and Cedrat-Flux 2D/3D. Specifically electrical efficiency has been evaluated calculating the mechanical power flowing into the generator and the electrical power on the resistive load (10) dt…”

Section: Finally the Electrical Torque (T E ) Is Calculated My Means mentioning

confidence: 99%

Study of High Efficiency Small Diameter Annular Wind Turbines by Means of CAE Techniques

Pitzalis

Corino

Ottella

et al. 2007

2007 IEEE Industry Applications Annual Meeting

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The report describes the design criteria for high efficiency small-scale wind turbines. While the overall wind to electrical conversion efficiency for large diameter rotors can be set at around 50%, the design of conventional wind turbines with diameters below 0,5 m is limited by air turbulence and low electrical efficiency. Coupling a ring shaped generator with ducted blades an overall efficiency of the order of 32% for a diameter of 200 mm is feasible. This together with low friction bearings allows a starting operation at wind speeds of 1m/s.

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A coupled field-circuit approach to 3D FEM analysis of electromechanical devices

Cited by 13 publications

References 0 publications

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

Essential Material Knowledge and Recent Model Developments for REBCO-Coated Conductors in Electric Power Systems

Advanced Linear Proportional Control of a Pressure Valve for an Electric Pressure Cooker

Study of High Efficiency Small Diameter Annular Wind Turbines by Means of CAE Techniques

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