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Related Concept Videos

Load-frequency control01:28

Load-frequency control

Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...

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Related Experiment Video

Updated: May 9, 2026

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
07:13

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing

Published on: October 20, 2021

A frequency control method for regulating wireless power to implantable devices.

Ping Si, A P Hu, S Malpas

    IEEE Transactions on Biomedical Circuits and Systems
    |July 16, 2013
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel wireless power transfer method that dynamically adjusts operating frequency to maintain stable power delivery, even with changing conditions. This ensures reliable power for critical applications like implanted medical devices.

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    Published on: September 27, 2018

    Area of Science:

    • Electrical Engineering
    • Biomedical Engineering
    • Power Electronics

    Background:

    • Wireless power transfer (WPT) is crucial for powering implanted medical devices.
    • Maintaining stable power delivery in WPT systems is challenging due to variations in load, coupling, and circuit parameters.
    • Existing methods often struggle with the dynamic environments typical of biomedical applications.

    Purpose of the Study:

    • To present a new method for regulating power in wireless transfer systems.
    • To demonstrate robust power regulation under varying operational conditions.
    • To validate the effectiveness of the proposed method for implanted medical devices.

    Main Methods:

    • The proposed method adjusts the resonant operating frequency of the primary converter.
    • Dynamic frequency alteration is achieved by modifying the tuning capacitance using soft-switched phase control.
    • A comprehensive theoretical analysis and experimental validation were performed.

    Main Results:

    • The system effectively regulates power transfer despite significant variations in load and coupling.
    • Dynamic frequency adjustment maintains consistent power delivery.
    • Experimental results confirm the functionality and reliability of the proposed WPT regulation technique.

    Conclusions:

    • The developed method offers a reliable solution for power regulation in wireless power transfer systems.
    • This technique is particularly advantageous for powering implanted medical devices requiring consistent energy supply.
    • The dynamic frequency control ensures robust performance in challenging, variable environments.