Fig 1 - uploaded by Marek Przybylski

# Dielectro magnetics pr epared in ITR and iron powder called Somaloy 500.

Source publication

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... of composite in comparison to powders only with lubricant Kenolube which is also commercially available from Höganäs. Magnetic powder was compacted using 800MPa pressure and was cured in a furnace with 200°C temperature for one hour. Examples of iron powder and dielectromagnetics prepared in Tele and Radio Research Institute (ITR) are shown in fig. 1. Measurements of electric and magnetic properties were done on toroidal samples with 55mm outer diameter, 45mm inner diameter, and 5mm ...

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... 110°C was not exceeded. The coil to measure magnetic flux density in a core has five turns (z=5) and an area of SC=35mm 2 of each turn. Fig. 9 shows schematic diagram of the inductor [3]. Parameters of elements from figure 9 are taken from measurements RCu=0,378Ω, L=6,1mH and calculations RFe=74,9Ω for f=250Hz. The vector graph is presented in fig. 10 for calculated and measured parameters of schematic diagram. Inductance of an inductor was measured by technical method. Inductances are measured with assumption that RFe→∞. It is assumed also that leakage inductance of the inductor is equal ...

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... of supply voltage U=20,1V and supply current 1A is presented, for example, in fig. 11 for supply frequency f=500Hz taken by a digital oscilloscope with a current and a voltage probes. It was also measured inductance of a coil without dielectromagnetic core and is equal 0,18mH. Inductance of the inductor with SMC in comparison to lone coil is larger 33 times. Inductance of a coil calculated from (1) is 184,4µH. ...

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... fig. 12 it is presented measurements of inductance of inductor in function of current for frequency f=250Hz. It is nonlinear and it changes from 5 to 6mH. ...

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... Iron loss was calculated by subtraction of a total loss and a coil loss. It was tried to divide iron loss for hysteresis component and eddy current component, but eddy current component is almost zero because of high resistivity of a core. This division could be possible if magnetic core had much less resistivity like e.g. pure cast iron. Fig. 15 presents losses in a coil, in magnetic core and total losses for frequency f=500Hz vs. I. In last part of research it was measured temperatures versus time for electric coil and SMC core for different frequencies, I=2A. Measurement of temperature was conducted using digital thermometer with temperature sensor - thermocouple type K ...

**Context 6**

... vs. I. In last part of research it was measured temperatures versus time for electric coil and SMC core for different frequencies, I=2A. Measurement of temperature was conducted using digital thermometer with temperature sensor - thermocouple type K Chromel (90%Ni 10%Cr)- Alumel (95%Ni 2%Mn 2%Al 1%Si). Changes of temperature are presented in fig. 18 and 19. From fig. 18 ...

**Context 7**

... of research it was measured temperatures versus time for electric coil and SMC core for different frequencies, I=2A. Measurement of temperature was conducted using digital thermometer with temperature sensor - thermocouple type K Chromel (90%Ni 10%Cr)- Alumel (95%Ni 2%Mn 2%Al 1%Si). Changes of temperature are presented in fig. 18 and 19. From fig. 18 ...

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