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Related Concept Videos

Three-Phase Circuits01:22

Three-Phase Circuits

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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...
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Power in a Three-Phase Circuit01:15

Power in a Three-Phase Circuit

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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...
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Power Distribution in Three-phase and Single Phase Circuits01:17

Power Distribution in Three-phase and Single Phase Circuits

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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;...
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Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

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A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
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Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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Three-Phase Time-Multiplexed Planar Power Transmission to Distributed Implants.

Byunghun Lee1, Dukju Ahn2, Maysam Ghovanloo1

  • 1GT-Bionics Laboratory, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30308 USA.

IEEE Journal of Emerging and Selected Topics in Power Electronics
|April 2, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces a novel wireless power transmitter for distributed receivers, improving power transfer efficiency. The new system offers a significant advancement for powering implants and devices across large areas.

Keywords:
Distributed neural interfaceimplantable medical devicesplanar spiral coilsthree-phase excitationwireless power transmission (WPT)

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Area of Science:

  • Electrical Engineering
  • Biomedical Engineering
  • Electromagnetics

Background:

  • Wireless power transfer is crucial for implantable devices.
  • Existing systems struggle with efficiency for arbitrarily distributed receivers.

Purpose of the Study:

  • To develop a wireless power transmitter for homogeneous power delivery to distributed receivers.
  • To enhance power transfer efficiency, especially under misalignment conditions.

Main Methods:

  • Designed a three-layer hexagonal planar spiral coil (hex-PSC) transmitter.
  • Implemented a three-phase time-division-multiplexed power transmission strategy.
  • Validated the system using Advanced Design System simulations and a measurement setup.

Main Results:

  • The novel transmitter delivers 5.4 mW to each receiver.
  • Achieved an average power transfer efficiency of 5.8% at 90° misalignment.
  • Outperformed conventional transmitters, which achieved only 1.4% efficiency.

Conclusions:

  • The proposed three-phase power transmission concept enables homogeneous wireless powering of arbitrarily distributed receivers.
  • This technology holds significant potential for applications like powering brain implants.