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| Description
| - A power and energy measurement in the smart grids requires a measurement system capable of signal processing at higher harmonic frequencies that are present in the power grids. For the calibration of instrument voltage transformers, resp. high-voltage dividers, it is necessary to have a high-voltage source with appropriate frequency range. The fundamental element of this source is the output high-voltage transformer operating at nominal voltage 15 kV and frequency up to 10 kHz. The output current is supposed to be lower than 20 mA. Following full paper is focused on the design of the magnetic circuit of transformer described above. With regard to easy realization of high voltage winding the C-type core shape is used. The standard magnetic cores of this type are produced from trafoperm material with minimal sheet thickness of 0.1 mm. However, parameters of these materials, given by its producers, do not fulfill the requirement on the frequency range. The suitable magnetic material seems to be nanocrystalline alloy based on iron. The dependence of permeability (Fig. 1.) and losses in magnetic circuit (Fig. 2.) on frequency for various magnetic inductions was measured. The measurement was realized with the sine waveform of magnetic induction. The peak value of magnetic field intensity was measured by coaxial shunt 0.098 Ω, resp. 0.005 Ω and calculated from length of mean line of force. The uniform distribution of field intensity was assumed. The split core was compressed as much as the increase in compression force had no influence on its parameters. From determined results it is obvious, that the realization of transformer with a magnetic circuit from nanocrystalline alloy is possible. The detailed construction will be introduced in the full paper.
- A power and energy measurement in the smart grids requires a measurement system capable of signal processing at higher harmonic frequencies that are present in the power grids. For the calibration of instrument voltage transformers, resp. high-voltage dividers, it is necessary to have a high-voltage source with appropriate frequency range. The fundamental element of this source is the output high-voltage transformer operating at nominal voltage 15 kV and frequency up to 10 kHz. The output current is supposed to be lower than 20 mA. Following full paper is focused on the design of the magnetic circuit of transformer described above. With regard to easy realization of high voltage winding the C-type core shape is used. The standard magnetic cores of this type are produced from trafoperm material with minimal sheet thickness of 0.1 mm. However, parameters of these materials, given by its producers, do not fulfill the requirement on the frequency range. The suitable magnetic material seems to be nanocrystalline alloy based on iron. The dependence of permeability (Fig. 1.) and losses in magnetic circuit (Fig. 2.) on frequency for various magnetic inductions was measured. The measurement was realized with the sine waveform of magnetic induction. The peak value of magnetic field intensity was measured by coaxial shunt 0.098 Ω, resp. 0.005 Ω and calculated from length of mean line of force. The uniform distribution of field intensity was assumed. The split core was compressed as much as the increase in compression force had no influence on its parameters. From determined results it is obvious, that the realization of transformer with a magnetic circuit from nanocrystalline alloy is possible. The detailed construction will be introduced in the full paper. (en)
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| Title
| - Magnetic circuit of high-voltage 10 kHz transformer
- Magnetic circuit of high-voltage 10 kHz transformer (en)
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| skos:prefLabel
| - Magnetic circuit of high-voltage 10 kHz transformer
- Magnetic circuit of high-voltage 10 kHz transformer (en)
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| skos:notation
| - RIV/68407700:21230/14:00224731!RIV15-MSM-21230___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21230/14:00224731
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - high voltage; transformers; nanocrystalline alloy (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Draxler, Karel
- Hlaváček, Jan
- Procházka, Radek
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| http://localhost/t...ganizacniJednotka
| |
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