Elastic Wireless Power Band for Implant Coil Misalignment
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Solution Overview
Problem
Conventional wireless power transmission systems for implantable medical devices are sensitive to coil alignment and position, leading to inefficiencies and discomfort due to the weight and heat generated by transmitter coils, and require physical wiring which affects patient quality of life and increases infection risk.
Innovation Solution
A wearable wireless power transmission device with an elastic band and conductive loops that allows for flexible positioning and efficient power transfer without the need for precise alignment, using resonant coils and impedance-matching structures to maintain effective coupling over a wider distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transmitter coils are used for wireless power transmission, then power can be transmitted wirelessly to implantable devices, but the system becomes sensitive to coil alignment and position variations
Solution Approach 1:
The transmitter coil is divided into multiple discrete coil segments arranged in an array. Each segment can be independently controlled or selectively activated, allowing the system to maintain effective coupling with the receiver coil even when alignment varies. This segmentation enables the transmitter to adapt to different positions and orientations of the implanted device.
Solution Approach 2:
The system dynamically selects and activates specific coil segments based on the detected position and orientation of the receiver coil. This dynamic adaptation allows the transmitter to maintain optimal power transfer efficiency without requiring precise manual alignment, as the system automatically adjusts which segments are active to compensate for misalignment.
2Power
If transmitter coils are made heavier to improve power transmission capability, then more power can be delivered to implantable devices, but patient comfort and wearability deteriorate
Solution Approach 1:
The transmitter coil is divided into multiple discrete coil segments arranged in an array. Each segment can be independently controlled or selectively activated, allowing the system to maintain effective coupling with the receiver coil even when alignment varies. This segmentation enables the transmitter to adapt to different positions and orientations of the implanted device.
Solution Approach 2:
The system dynamically selects and activates specific coil segments based on the detected position and orientation of the receiver coil. This dynamic adaptation allows the transmitter to maintain optimal power transfer efficiency without requiring precise manual alignment, as the system automatically adjusts which segments are active to compensate for misalignment.
3Ease of operation
If transmitter coils are used for wireless power transmission, then power can be transmitted without physical wiring, but significant heat is generated affecting patient comfort and safety
Solution Approach 1:
The transmitter coil is divided into multiple discrete coil segments arranged in an array. Each segment can be independently controlled or selectively activated, allowing the system to maintain effective coupling with the receiver coil even when alignment varies. This segmentation enables the transmitter to adapt to different positions and orientations of the implanted device.
Solution Approach 2:
The system uses periodic or pulsed activation of coil segments rather than continuous operation. By alternating which segments are active and allowing rest periods, the system reduces cumulative heat generation while maintaining effective power transfer through periodic coupling with the receiver coil.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables reliable and efficient wireless power transfer with reduced sensitivity to coil alignment and position, improving patient comfort and reducing the risk of infection by eliminating the need for physical wiring, while maintaining effective power delivery to implanted devices.
Implementation Method 1
supplying current to the at least one of the plurality of conductive wires using the power conditioner to wirelessly transfer power from the wireless power transmission device to the wireless power receiver
Data Source
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Figure 3A~3B
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AI summary
A wireless power transmission device wearable by a subject is provided. The wireless power transmission device includes a power conditioner including a first end and an opposite second end, and a band. The band includes a first end fixedly coupled to the power conditioner first end, a second end fixedly coupled to the power conditioner second end, a body extending between the band first end and the band second end, the body including at least one elastic segment, and a plurality of conductive wires extending along the body to form a plurality of conductive loops, at least one of the plurality of conductive wires electrically coupled to the power conditioner.