Sensors 2010, 10(9), 8161-8172; doi:10.3390/s100908161

Applications of Ferro-Nanofluid on a Micro-Transformer

1email, 1email, 1,* email, 2email and 3email
Received: 8 June 2010; in revised form: 20 August 2010 / Accepted: 20 August 2010 / Published: 31 August 2010
(This article belongs to the Section Physical Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: An on-chip transformer with a ferrofluid magnetic core has been developed and tested. The transformer consists of solenoid-type coil and a magnetic core of ferrofluid, with the former fabricated by MEMS technology and the latter by a chemical co-precipitation method. The performance of the MEMS transformer with a ferrofluid magnetic core was measured and simulated with frequencies ranging from 100 kHz to 100 MHz. Experimental results reveal that the presence of the ferrofluid increases the inductance of coils and the coupling coefficient of transformer; however, it also increases the resistance owing to the lag between the external magnetic field and the magnetization of the material.
Keywords: MEMS transformer; ferrofluid
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MDPI and ACS Style

Tsai, T.-H.; Kuo, L.-S.; Chen, P.-H.; Lee, D.-S.; Yang, C.-T. Applications of Ferro-Nanofluid on a Micro-Transformer. Sensors 2010, 10, 8161-8172.

AMA Style

Tsai T-H, Kuo L-S, Chen P-H, Lee D-S, Yang C-T. Applications of Ferro-Nanofluid on a Micro-Transformer. Sensors. 2010; 10(9):8161-8172.

Chicago/Turabian Style

Tsai, Tsung-Han; Kuo, Long-Sheng; Chen, Ping-Hei; Lee, Da-sheng; Yang, Chin-Ting. 2010. "Applications of Ferro-Nanofluid on a Micro-Transformer." Sensors 10, no. 9: 8161-8172.

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