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Investigation of electrical and magnetic properties of ferro-nanofluid on transformers.

Tsai TH, Chen PH, Lee DS, Yang CT - Nanoscale Res Lett (2011)

Bottom Line: The ferro-nanofluid was fabricated by a chemical co-precipitation method.The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration.The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, No, 1, Sec, 4, Roosevelt Rd,, Taipei 10617, Taiwan. phchen@ntu.edu.tw.

ABSTRACT
This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and with ferro-nanofluid loaded in the capillary. The ferro-nanofluid was fabricated by a chemical co-precipitation method. The performances of the transformers with either air core or ferro-nanofluid at different concentrations of nanoparticles of 0.25, 0.5, 0.75, and 1 M were measured and simulated at frequencies ranging from 100 kHz to 100 MHz. The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration. The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

No MeSH data available.


The quality factors of coils of transformers with different magnetic cores: (a) measured data; (b) simulated data.
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Figure 8: The quality factors of coils of transformers with different magnetic cores: (a) measured data; (b) simulated data.

Mentions: Figure 8 shows the quality factor of coils of transformers with different magnetic cores. Owing to the fact that the increase of resistance is larger and faster than that of inductance with the presence of Fe3O4 nanofluids, the quality factor decreases when the Fe3O4 concentration rises. The simulated results show the same trend.


Investigation of electrical and magnetic properties of ferro-nanofluid on transformers.

Tsai TH, Chen PH, Lee DS, Yang CT - Nanoscale Res Lett (2011)

The quality factors of coils of transformers with different magnetic cores: (a) measured data; (b) simulated data.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211327&req=5

Figure 8: The quality factors of coils of transformers with different magnetic cores: (a) measured data; (b) simulated data.
Mentions: Figure 8 shows the quality factor of coils of transformers with different magnetic cores. Owing to the fact that the increase of resistance is larger and faster than that of inductance with the presence of Fe3O4 nanofluids, the quality factor decreases when the Fe3O4 concentration rises. The simulated results show the same trend.

Bottom Line: The ferro-nanofluid was fabricated by a chemical co-precipitation method.The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration.The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, No, 1, Sec, 4, Roosevelt Rd,, Taipei 10617, Taiwan. phchen@ntu.edu.tw.

ABSTRACT
This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and with ferro-nanofluid loaded in the capillary. The ferro-nanofluid was fabricated by a chemical co-precipitation method. The performances of the transformers with either air core or ferro-nanofluid at different concentrations of nanoparticles of 0.25, 0.5, 0.75, and 1 M were measured and simulated at frequencies ranging from 100 kHz to 100 MHz. The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration. The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

No MeSH data available.