Loss coefficient characterisation for high frequency, high flux density, electrical machine applications

Potgieter, Johannes H. J.; Márquez-Fernández, Francisco J.; Fraser, Alexander G.; McCulloch, Malcolm

doi:10.1109/iemdc.2015.7409224

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…18. If equation (19), which is a function of cross-sectional area, is substituted into equation ( 18), an empirical Steinmetz equation can be formed as given in (20).…”

Section: Figure 18 Non-linear Regression Analysis For the Varying 𝑲 𝒆𝒑 ̃Values In The Experimentsmentioning

confidence: 99%

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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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“…18. If equation (19), which is a function of cross-sectional area, is substituted into equation ( 18), an empirical Steinmetz equation can be formed as given in (20).…”

Section: Figure 18 Non-linear Regression Analysis For the Varying 𝑲 𝒆𝒑 ̃Values In The Experimentsmentioning

confidence: 99%

“…On the other hand, the studies conducted by Potgieter et al [18,19] and Asama et al [37] have more informative core loss calculation approaches. For instance, Asama et al have used more than one toroidal test rings to measure the core losses of SMC [37].…”

Section: Introductionmentioning

confidence: 99%