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Related Concept Videos

Maximum Power Transfer01:16

Maximum Power Transfer

745
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...
745
Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

678
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
678
Power Distribution in Three-phase and Single Phase Circuits01:17

Power Distribution in Three-phase and Single Phase Circuits

553
Power distribution within electrical circuits is a foundational aspect of residential and industrial energy systems. While single-phase power is common in residential settings, three-phase power is the standard for industrial environments with heavy machinery. Each system is different and has advantages, and it's crucial to understand the underlying principles of power distribution and material efficiency.
Single-Phase Power Distribution:
Single-phase circuits are typical in household settings;...
553
PD Controller: Design01:26

PD Controller: Design

558
In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
558
Power in a Three-Phase Circuit01:15

Power in a Three-Phase Circuit

556
Three-phase systems have two configurations: the wye and delta. A star configuration can be three or four wires; in a delta configuration, the components are connected in a closed loop. Instantaneous power refers to the power value at a precise moment, and in a balanced three-phase system, it is constant. This is because the sum of the instantaneous powers in the three phases remains steady over time, despite individual fluctuations, due to the symmetry and phase relationship. The total...
556
Three-Phase Circuits01:22

Three-Phase Circuits

694
AC power distribution systems have three categories: single-phase, two-phase, and three-phase systems. The single-phase circuit, common in residential settings, typically employs a two-wire system connecting a single AC source to various loads. These circuits support standard household appliances operating at 120 volts (V) and 240 V, such as lamps, televisions, and microwaves. The first generators, Niagara Falls hydro plant installed in 1895, were two-phase and designed by Nikola Tesla. The...
694

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Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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Wireless Pacing Using an Asynchronous Three-Tiered Inductive Power Transfer System.

Parinaz Abiri1,2, Arash Abiri3, Varun Gudapati2

  • 1Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA.

Annals of Biomedical Engineering
|January 25, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a wireless, batteryless pacemaker system for cardiac arrhythmias. This innovative intravascular pacer uses inductive power transfer, potentially improving patient safety and eliminating battery replacement surgeries.

Keywords:
Antenna designCoil designCoil design optimizationImplantable medical deviceInductive power transferReceiver antennaTransmitter antennaWireless medical deviceWireless pacemaker

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Cardiovascular Technology

Background:

  • Lead-related complications significantly impact pacemaker patient safety and survival.
  • Current pacemaker technology faces challenges with lead integrity and battery longevity.

Purpose of the Study:

  • To present a system architecture for a wireless, batteryless intravascular pacemaker.
  • To enable long-range inductive power transfer to a microscale pacer for cardiac applications.

Main Methods:

  • A three-tiered, dual-sub-system, four-coil design operating on two frequencies.
  • Intermittent, remote-controlled inductive power transfer.
  • Coil design optimization, numerical simulations, and experimental analysis for system validation.

Main Results:

  • Achieved inductive power transfer over a 55 mm range to a 3 mm diameter microscale pacer.
  • Demonstrated a system capable of long-range wireless power delivery.
  • Validated the design for potential intravascular deployment in the anterior cardiac vein.

Conclusions:

  • The proposed system offers a wireless, batteryless solution to overcome lead-related complications in pacemakers.
  • The stent-like fixation mechanism bypasses traditional lead issues.
  • Wireless power transfer eliminates the need for battery replacement procedures, enhancing patient care.