Single Sheet Tester With Variable Dimensions

Gmyrek, Zbigniew

doi:10.1109/tim.2016.2540839

Cited by 24 publications

(9 citation statements)

References 20 publications

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“…For many years, designers of electric motors applied lamination characteristics obtained from catalogs or simple measurements performed using standard measuring systems, such as Epstein frame or single-sheet tester (single-strip tester) [1][2][3]. Sometimes ring cores were applied, although this is not a standard solution.…”

Section: Introductionmentioning

confidence: 99%

Impact of a Punching Process on the SyRM Iron Loss: SPICE Model as an Effective Tool for Iron Loss Modeling

Gmyrek¹

2021

Energies

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Many technologies for cutting the magnetic laminations, from which electric motors cores are built, change material properties, among which are magnetizability and iron loss, thus affecting the motor parameters such as motor efficiency. This problem is particularly important for low-power motors, in which the dimensions of the magnetic circuit elements are relatively small. The correct estimation of the motor efficiency is important as early as at its design stage. This is possible when the correct material characteristics are used. This knowledge and analytical model enabling fast estimation of material properties (depending on the actual size) are necessary for engineers, who design electrical motors by analyzing many solution variants in a short time. The author proposes an analytical model of changing material properties, implemented in SPICE software. Its effectiveness was compared with measurement results while being a competitive solution in relation to other analytical models. The proposed SPICE model allowed evaluating material properties for lamination of any width. In the end, the knowledge concerning the material properties was used to calculate the iron loss in the stator of the SyRM motor, showing the need to use the material characteristics calculated for the specified width of the core piece.

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Section: Introductionmentioning

confidence: 99%

Impact of a Punching Process on the SyRM Iron Loss: SPICE Model as an Effective Tool for Iron Loss Modeling

Gmyrek¹

2021

Energies

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“…When testing the properties of magnetic materials subjected to a cutting process, two types of measuring systems are commonly used: the first using toroidal cores and the second using rectangular-shaped specimens. The authors of this paper used such a non-standard SST solution, which is described in detail in the literature [17]. The measuring system used can be adapted to the geometric sizes of the measured samples (within specified limits) and consists of the separate elements shown in Figure 1.…”

Section: The Measuring System and The Measurement Methodsmentioning

confidence: 99%

Efficiency Analysis of Fractional KiloWatt Reluctance Motors with Various Frame Sizes, Taking into Account the Impact of the Punching Process

Gmyrek

Smółka

2020

Energies

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The need to reduce electricity consumption by electrical devices, including electric motors, is the reason for the development of new designs. Designers strive to improve operational parameters, including efficiency, using, for example, new types of magnetic materials, new types of stator windings, etc. Currently, in mass production, motor cores are made of punched laminations—punching causes damage of core parts. For motors of relatively large geometrical sizes, this effect is ignored during design. For motors having small dimensions, this negative effect results in a reduction in efficiency, which is mostly small for this type of motor. In this paper, the authors propose a new rapid algorithm based on simple measurements to determine the material characteristics of the damaged material part. Then, using them in the FEM models, they determine the efficiency of motors with various powers and frame sizes. On this basis, the conclusions are formulated, they may be helpful for motor designers.

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“…In terms of the seventh-order harmonic, relevant MC length could be obtained from (8) by assuming B p = B 0 , which is the saturated flux density for the material. Then, considering contributions from l m in each harmonic component, MC length under square waveforms l m,squ could be expressed as formula (16):…”

Section: M Under Square Waveformsmentioning

confidence: 99%

“…Gmyrek designed an SST with variable dimensions. By using the SST, measurements from the same sample twice at the same flux density could lead to the calculation of the magnetic voltage drop effectively, and field intensity could then be acquired [16]. However, the analysis of the variation of l m in SST is rarely focused, while SST is the most suitable for nanocrystalline alloy's measurement.…”

Section: Introductionmentioning

confidence: 99%

Magnetic measurement of nanocrystalline alloy based on a single sheet tester

Zhang

et al. 2020

IET Science Measure & Tech

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Generally, for the measurement of magnetic characteristics of nanocrystalline alloy, the magnetic circuit length (lm) is assumed as a constant, and magnetic measurement under square waveform is rarely focused. This paper examines that magnetic characteristics of nanocrystalline alloy are measured under sinusoidal waveforms and square waveforms based on a single sheet tester. The factors related to lm are analysed from the tested data under sinusoidal excitations, and a novel method to determine lm is presented, which is then extended to the case under square waveforms. By combining with a power electronic inverter, the influence of power electronic topology on measurements is analysed, and the oscillation mechanism of excitation current of single sheet tester is revealed. As a result, the limitation of the H‐coil method for acquiring the magnetic field intensity H under square waveforms is pointed out, and improved magnetic circuit method is introduced. It is shown from experimental results that the proposed measurement system is useful for acquiring magnetisation characteristics of the nanocrystalline alloy.

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Single Sheet Tester With Variable Dimensions

Cited by 24 publications

References 20 publications

Impact of a Punching Process on the SyRM Iron Loss: SPICE Model as an Effective Tool for Iron Loss Modeling

Impact of a Punching Process on the SyRM Iron Loss: SPICE Model as an Effective Tool for Iron Loss Modeling

Efficiency Analysis of Fractional KiloWatt Reluctance Motors with Various Frame Sizes, Taking into Account the Impact of the Punching Process

Magnetic measurement of nanocrystalline alloy based on a single sheet tester

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