Tang, Sai Chun;
Le Tim Lun, Tian;
Guo, Ziyan;
Kwok, Ka Wai;
McDannold, Nathan J;
(2016)
Mid-range wireless power transfer with segmented coil transmitters for implantable heart pumps.
In:
2016 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM).
(pp. pp. 1-3).
IEEE: Nanjing, China.
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Abstract
In wireless power transfer systems, the transmitting coil dimensions can substantially affect the transmission range and alignment sensitivity. We found that a transmitting coil with larger inner and outer diameter has a wider transmission range and lower alignment sensitivity. Thus, we developed a larger coil (24¯30 cm2) designed to be embedded in the back of a vest to power DC pumps for artificial hearts or LVADs. To significantly reduce the required voltage, the coil was divided into 8 segments with resonant capacitors. The coil was operated at 6.78 MHz and evaluated with a 5.3-cm diameter receiving coil. A circuit model for the energy coupling coils was developed to predict the output power and efficiency. Having a coil separation of 7.7 cm, the output power and efficiency of the energy coupling coils are higher than 48 W and 80%, respectively. The system was experimentally tested with a DC pump, demonstrating that the proposed coil segmentation technique can significantly reduce the transmitter voltage to a safe level (~10 Vrms).
| Type: | Proceedings paper |
|---|---|
| Title: | Mid-range wireless power transfer with segmented coil transmitters for implantable heart pumps |
| Event: | 2016 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) |
| Dates: | 16 May 2016 - 18 May 2016 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/iwem.2016.7504897 |
| Publisher version: | http://dx.doi.org/10.1109/iwem.2016.7504897 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Heart, Capacitors, Couplings, Power generation, Sensitivity, Load modeling |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10188953 |
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