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Related Concept Videos

Maximum Power Transfer01:16

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...

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Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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A high-power versatile wireless power transfer for biomedical implants.

Hao Jiang1, Jun Min Zhang, Shy Shenq Liou

  • 1School of Engineering, San Francisco State University, California, USA. jianghao@sfsu.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 25, 2010
PubMed
Summary
This summary is machine-generated.

Powering implantable biomedical actuators wirelessly is challenging. A novel rotating-magnets system delivers 10W over 1cm, significantly improving upon existing inductive coil methods for medical implants.

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Area of Science:

  • Biomedical Engineering
  • Electrical Engineering
  • Medical Devices

Background:

  • Implantable biomedical actuators require substantial power (hundreds of mW).
  • Current wireless power transfer methods, primarily inductive coils, are limited to 275 mW at 1 cm and are sensitive to environmental factors.
  • Existing solutions face technical constraints, limiting power delivery and reliability for medical implants.

Purpose of the Study:

  • To introduce a novel wireless power transfer (WPT) method for biomedical implants.
  • To overcome the power limitations and environmental sensitivities of current WPT technologies.
  • To demonstrate a WPT system capable of delivering significantly higher power for medical applications.

Main Methods:

  • Development of a novel wireless power transfer system utilizing rotating magnets.
  • Experimental validation of power delivery capabilities over a 1 cm distance.
  • Assessment of the system's versatility and independence from impedance matching networks.

Main Results:

  • Demonstrated wireless power transfer capable of delivering approximately 10 W over a 1 cm distance.
  • Achieved power delivery significantly exceeding the current state-of-the-art (275 mW).
  • The rotating-magnets system showed versatility, eliminating the need for complex impedance matching networks.

Conclusions:

  • The novel rotating-magnets based WPT system offers a breakthrough in powering implantable biomedical devices.
  • This technology overcomes the power and environmental limitations of traditional inductive coupling methods.
  • The demonstrated 10W power delivery at 1cm paves the way for more demanding biomedical implant applications.