Use of variational methods to the eddy currents calculation in thin conducting plates

Sikora, R.; Purczyński, Jan; Lipiński, Wojciech; Gramz, M.

doi:10.1109/tmag.1978.1059974

Cited by 27 publications

(5 citation statements)

References 1 publication

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“…where 𝑡 is the lamination thickness (m), 𝐵 𝑚 is the peak magnetic flux density (T) and 𝑓 stands for the frequency (Hz). 𝜆 is the geometrical coefficient and defined as [45,46]:…”

Section: A Option 1 -Three Term Modified Steinmetz Equation For Smcmentioning

confidence: 99%

Empirical Implementation of the Steinmetz Equation to Compute Eddy Current Loss in Soft Magnetic Composite Components

et al. 2022

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Finite element analysis of magnetic materials allows accurate prediction of losses and is crucial in the design of electromagnetic devices and products. Soft magnetic composites are an alternative to silicon steel laminations, yet the electromagnetic material properties are less well documented and include uncertainties which can lead to inaccurate iron and Joule loss computations. The microstructure of soft magnetic composites, which is based on ferromagnetic particles coated by inorganic resistive insulation, makes the process of iron loss prediction unique. Composite core materials require further attention by design engineers in terms of the effect of component size and pressing processes on core loss predictions, which for laminations uses the well-known Steinmetz law. This study accesses the existing soft magnetic composite core loss modelling trends using experimentally measured results. The challenges of estimating and using Steinmetz core loss coefficients via curve fitting approaches are discussed. The study indicates that soft magnetic composite components need to be treated differently to laminated iron cores. Modelling the composite materials in finite element software requires experimentally informed loss models to be able to accurately compute power losses under varying magnetic flux density and electrical frequency. An approach is suggested which can predict iron losses to within 7%, but is only validated for component cross sectional areas of 144 mm 2 or less.

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Section: A Option 1 -Three Term Modified Steinmetz Equation For Smcmentioning

confidence: 99%

Empirical Implementation of the Steinmetz Equation to Compute Eddy Current Loss in Soft Magnetic Composite Components

et al. 2022

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“…Thus, this study employs the second way for PM and Eq. (2) from [10] is utilized to predict PM losses:…”

Section: B Pm Lossmentioning

confidence: 99%

Machine Learning Based Correction Model in PMSM Power Loss Estimation for More-Electric Aircraft Applications

Gao

Yang

Wang

et al. 2020

2020 23rd International Conference on Electrical Machines and Systems (ICEMS)

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This study utilizes the machine learning (ML) technique to estimate the power loss of surface-mounted Permanent Magnet Synchronous Motor (PMSM) for More-Electric Aircraft (MEA). Existing approaches do not consider ML methods in power loss calculation and only depend on empirical correction factors. The proposed ML aided model is proved to be more precise. Matching the analytical loss estimation with finite-element analysis (FEA) is the main research goal which includes two aspects: iron loss and permanent magnet (PM) loss. They are both based on conventional formulae but this study analyzes the limitation of these equations and the ML correction model can provide dedicated factors for the analytical motor model to make sure that the loss estimation is accurate in the whole motor design space. Average correction factor (ACF) approach is regarded as the comparison method to verify the excellent performance of the proposed ML model.

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“…Early in the 1970s, analytical models for calculating eddy-currents were developed. The variational methods were applied for thing purpose in thin conducting plates [62], and the surface impedance has been used to predict eddy-current fields in conductors [63]. To estimate PM eddy-current losses and retaining ring losses of a PMSM, the authors of [8] proposed a linear model, by taking as infinity the magnetic permeability of the rotor core and stator iron.…”

Section: Two-dimensional Analytical Modelsmentioning

confidence: 99%

Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis

Ouamara

Dubas

2019

MCA

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Eddy-current analysis is an important research field. This phenomenon occurs in multiple areas and has several applications: electromagnetic braking, repulsive effects, levitation, etc. Thereby, this paper is limited to eddy-current study in rotating electrical machines. In the design process, if the permanent-magnet (PM) loss calculation is very important, the overheating due to eddy-currents must be taken into account. The content of this paper includes sources, calculation methods, reduction techniques, and thermal analysis of PM eddy-current losses. This review aims to act as a guide for the reader to learn about the different aspects and points to consider in studying the eddy-current.

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Use of variational methods to the eddy currents calculation in thin conducting plates

Cited by 27 publications

References 1 publication

Empirical Implementation of the Steinmetz Equation to Compute Eddy Current Loss in Soft Magnetic Composite Components

Empirical Implementation of the Steinmetz Equation to Compute Eddy Current Loss in Soft Magnetic Composite Components

Machine Learning Based Correction Model in PMSM Power Loss Estimation for More-Electric Aircraft Applications

Permanent-Magnet Eddy-Current Losses: A Global Revision of Calculation and Analysis

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