Abstract
Implantable biomedical sensors and actuators are highly desired in modern medicine. In many cases, the implant~{!/~}s electrical power source profoundly determines its overall size and performance [1]. The inductively coupled coil pair operating at the radio-frequency (RF) has been the primary method for wirelessly delivering electrical power to implants for the last three decades [2]. Recent designs significantly improve the power delivery efficiency by optimizing the operating frequency, coil size and coil distance [3]. However, RF radiation hazard and tissue absorption are the concerns in the RF wireless power transfer technology (RF-WPTT) [4], [5]. Also, it requires an accurate impedance matching network that is sensitive to operating environments between the receiving coil and the load for efficient power delivery [6]. In this paper, a novel low-frequency wireless power transfer technology (LF-WPTT) using rotating rare-earth permanent magnets is demonstrated. The LF-WPTT is able to deliver 2.967 W power at to an 117.1 resistor over 1 cm distance with 50% overall efficiency. Because of the low operating frequency, RF radiation hazard and tissue absorption are largely avoided, and the power delivery efficiency from the receiving coil to the load is independent of the operating environment. Also, there is little power loss observed in the LF-WPTT when the receiving coil is enclosed by non-magnetic implant-grade stainless steel.
| Original language | English (US) |
|---|---|
| Article number | 2220763 |
| Pages (from-to) | 526-535 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Biomedical Circuits and Systems |
| Volume | 7 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jan 4 2013 |
| Externally published | Yes |
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Keywords
- Biomedical implants
- inductive coupling
- wireless power transfer
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Biomedical Engineering
Cite this
A low-frequency versatile wireless power transfer technology for biomedical implants. / Jiang, Hao; Zhang, Junmin; Lan, Di; Chao, Kelvin K.; Liou, Shyshenq; Shahnasser, Hamid; Fechter, Richard; Hirose, Shinjiro; Harrison, Michael; Roy, Shuvo.
In: IEEE Transactions on Biomedical Circuits and Systems, Vol. 7, No. 4, 2220763, 04.01.2013, p. 526-535.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A low-frequency versatile wireless power transfer technology for biomedical implants
AU - Jiang, Hao
AU - Zhang, Junmin
AU - Lan, Di
AU - Chao, Kelvin K.
AU - Liou, Shyshenq
AU - Shahnasser, Hamid
AU - Fechter, Richard
AU - Hirose, Shinjiro
AU - Harrison, Michael
AU - Roy, Shuvo
PY - 2013/1/4
Y1 - 2013/1/4
N2 - Implantable biomedical sensors and actuators are highly desired in modern medicine. In many cases, the implant~{!/~}s electrical power source profoundly determines its overall size and performance [1]. The inductively coupled coil pair operating at the radio-frequency (RF) has been the primary method for wirelessly delivering electrical power to implants for the last three decades [2]. Recent designs significantly improve the power delivery efficiency by optimizing the operating frequency, coil size and coil distance [3]. However, RF radiation hazard and tissue absorption are the concerns in the RF wireless power transfer technology (RF-WPTT) [4], [5]. Also, it requires an accurate impedance matching network that is sensitive to operating environments between the receiving coil and the load for efficient power delivery [6]. In this paper, a novel low-frequency wireless power transfer technology (LF-WPTT) using rotating rare-earth permanent magnets is demonstrated. The LF-WPTT is able to deliver 2.967 W power at to an 117.1 resistor over 1 cm distance with 50% overall efficiency. Because of the low operating frequency, RF radiation hazard and tissue absorption are largely avoided, and the power delivery efficiency from the receiving coil to the load is independent of the operating environment. Also, there is little power loss observed in the LF-WPTT when the receiving coil is enclosed by non-magnetic implant-grade stainless steel.
AB - Implantable biomedical sensors and actuators are highly desired in modern medicine. In many cases, the implant~{!/~}s electrical power source profoundly determines its overall size and performance [1]. The inductively coupled coil pair operating at the radio-frequency (RF) has been the primary method for wirelessly delivering electrical power to implants for the last three decades [2]. Recent designs significantly improve the power delivery efficiency by optimizing the operating frequency, coil size and coil distance [3]. However, RF radiation hazard and tissue absorption are the concerns in the RF wireless power transfer technology (RF-WPTT) [4], [5]. Also, it requires an accurate impedance matching network that is sensitive to operating environments between the receiving coil and the load for efficient power delivery [6]. In this paper, a novel low-frequency wireless power transfer technology (LF-WPTT) using rotating rare-earth permanent magnets is demonstrated. The LF-WPTT is able to deliver 2.967 W power at to an 117.1 resistor over 1 cm distance with 50% overall efficiency. Because of the low operating frequency, RF radiation hazard and tissue absorption are largely avoided, and the power delivery efficiency from the receiving coil to the load is independent of the operating environment. Also, there is little power loss observed in the LF-WPTT when the receiving coil is enclosed by non-magnetic implant-grade stainless steel.
KW - Biomedical implants
KW - inductive coupling
KW - wireless power transfer
UR - http://www.scopus.com/inward/record.url?scp=84881044299&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84881044299&partnerID=8YFLogxK
U2 - 10.1109/TBCAS.2012.2220763
DO - 10.1109/TBCAS.2012.2220763
M3 - Article
C2 - 23893211
AN - SCOPUS:84881044299
VL - 7
SP - 526
EP - 535
JO - IEEE Transactions on Biomedical Circuits and Systems
JF - IEEE Transactions on Biomedical Circuits and Systems
SN - 1932-4545
IS - 4
M1 - 2220763
ER -