Determination of Specific Losses in the Limbs of an Epstein Frame Using a Three Epstein Frame Methodology Applied to Grain Oriented Electrical Steels

Parent, Guillaume; Penin, Rémi; Lecointe, Jean‐Philippe; Brudny, J.F.; Belgrand, Thierry

doi:10.3390/s16060826

Cited by 14 publications

(4 citation statements)

References 7 publications

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“…Simulation results for comparison of current for various combinations of primary and secondary turns are presented in Figure 7. The primary and the secondary turns considered for analysis are (24,8); (32,16); (81, 18). It can be observed that the primary and the secondary turns (24,8) generates the required MF of 1 T to 1.5 T with a current range from 0.8 A to 16 A.…”

Section: Comparison For Various Number Of Turnsmentioning

confidence: 99%

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Analysis of Electric Motor Magnetic Core Loss under Axial Mechanical Stress

Kumar

Raj²,

Vijayakumar

et al. 2020

Sensors

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The electrical machine core is subjected to mechanical stresses during manufacturing processes. These stresses include radial, circumferential and axial components that may have significant influence on the magnetic properties and it further leads to increase in iron loss and permeability in the stator core. In this research work, analysis of magnetic core iron loss under axial mechanical stress is investigated. The magnetic core is designed with Magnetic Flux Density (MF) ranging from 1.0 T to 1.5 T with estimated dimensions under various input voltages from 5 V to 85 V. Iron losses are predicted by the axial pressure created manually wherever required and is further applied to the designed magnetic core in the range of 5 MPa to 50 MPa. Finite element analysis is employed to estimate the magnetic core parameters and the magnetic core dimensions. A ring core is designed with the selected dimensions for the experimental evaluation. The analysis of iron loss at 50Hz frequency for non-oriented electrical steel of M400-50A is tested experimentally using the Epstein frame test and force-fit setup test. Experimental evaluation concludes that the magnetic core saturates when it reaches its knee point of the B-H curve of the chosen material and also reveals that the axial pressure has a high impact on the magnetic properties of the material.

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Section: Comparison For Various Number Of Turnsmentioning

confidence: 99%

“…An experimental method to characterize the magnetic properties of Grain Oriented Electrical Steel in the rolling direction was proposed in [16]. In [17], a stator core shape design method is proposed to improve power density of a surface-mounted permanent magnet (SPM) motor.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electric Motor Magnetic Core Loss under Axial Mechanical Stress

Kumar

Raj²,

Vijayakumar

et al. 2020

Sensors

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“…where A is the cross-sectional area of the sample, is obtained and the effective magnetic path length is retrieved from (1). A similar approach has been followed by the authors of [33], who used three Epstein frames. However, small deviations from uniformity of the magnetization inside the Epstein legs inevitably occur, impairing to some extent this conclusion.…”

Section: ) Epstein Framementioning

confidence: 99%

1-D and 2-D Loss-Measuring Methods: Optimized Setup Design, Advanced Testing, and Results

Barrière

Appino²,

Ragusa

et al. 2018

IEEE Trans. Magn.

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Accurate measurements of magnetic losses in laminations are a prerequisite for their theoretical assessment, as well as for satisfying calculations of energy dissipation in engineering systems. The standardized and universally applied measurement method, used as a reference for the definition of the material quality in the specification standards, is based on the Epstein test frame magnetizer. Its success relies on the reproducibility of the performed measurements. Its limitations come, on the one hand, from cumbersome sample preparation and, on the other hand, from a certain divergence of the measured loss figures from the true loss figures. Similar systematic differences between measured and true loss values are also observed with the standard Single Sheet Tester method. In both cases, measurements under bi-dimensional induction are or cannot be envisaged. The design of new measurement setups and magnetizers overcoming the drawbacks of the Epstein and Single Sheet Tester methods and possibly becoming recognized Standards in the future is welcome, but challenging. This paper is devoted to a comprehensive discussion of the state of the art in the alternating and two-dimensional measurements of energy losses in soft magnetic materials for electrical applications. We will summarize, in particular, measuring solutions proposed in the current literature and we will discuss in detail recent developments achieved in the authors' labs regarding 1D measurements with compensated permeameters and 2D measurements at high inductions and high frequencies.

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“…The latter includes high portions from the complex magnetization of the four corners of the quadratic frame of double-overlapped sample strips. Since decades, attempts are made to attain a separation by means of a so-called effective path length [3][4][5], or by specific substitution methods [6,7]. However, long experience demonstrated that it is impossible to attain accurate results from these approaches.…”

Section: Introductionmentioning

confidence: 99%