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Related Concept Videos

Maximum Power Transfer01:16

Maximum Power Transfer

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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.
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The Maximum Power Transfer Theorem01:20

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Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
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Self-Detachable Through-Metal Acoustic Wireless Power Transfer.

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    This summary is machine-generated.

    This study presents a novel acoustic wireless power transfer system for transferring power through steel plates without couplants. The system utilizes electro-permanent-magnets (EPMs) for detachable receiver coupling, achieving up to 63% efficiency.

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    Area of Science:

    • Materials Science
    • Mechanical Engineering
    • Electrical Engineering

    Background:

    • Electromagnetic waves are shielded by metal structures, limiting wireless power transfer.
    • Acoustic vibrations offer a potential alternative for power transfer through metals.
    • Existing acoustic power transfer methods often require couplants or permanent bonding.

    Purpose of the Study:

    • To present a novel self-detachable acoustic wireless power transfer system.
    • To enable power transfer through the thickness of a steel plate without couplants.
    • To investigate the use of electro-permanent-magnets (EPMs) for detachable transducer coupling.

    Main Methods:

    • Designed a system with a transmitter transducer on one side of a steel plate and a receiver transducer on the other.
    • Utilized EPMs to apply adjustable clamping force around the receiver transducer for enhanced coupling.
    • Investigated the system's performance with varying steel plate thicknesses and clamping forces.
    • Developed a finite element model to analyze vibration mode shapes.

    Main Results:

    • Achieved a maximum power transfer efficiency of 63%.
    • Demonstrated successful power transfer through steel plates without the need for couplants.
    • Showcased the ability to electronically switch the EPM clamping force ON/OFF for detachable coupling.
    • Investigated the influence of steel plate thickness and clamping force on efficiency.

    Conclusions:

    • The developed system offers a viable solution for wireless power transfer through metal structures.
    • The self-detachable nature of the receiver, enabled by EPMs, simplifies applications in harsh environments.
    • This technology holds promise for charging devices like unmanned aerial vehicles (UAVs) and other consumer electronics.