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Related Concept Videos

Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The winding...
Galvanometer01:24

Galvanometer

Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform magnetic...
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
Mutual Inductance01:24

Mutual Inductance

Inductance is the property of a device that tells us how effectively it induces an emf in another device. In other words, it is a physical quantity that expresses the effectiveness of a given device.
When two circuits carrying time-varying currents are close to one another, the magnetic flux through each circuit varies because of the changing current in the other circuit. Consequently, an emf is induced in each circuit by the changing current in the other. Therefore, this type of emf is called...
Instrument Transformers01:23

Instrument Transformers

Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Magnetooptical current transformer. 2: Components.

H Aulich, W Beck, N Douklias

    Applied Optics
    |March 18, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study details key components for magneto-optical current transformers, highlighting He-Ne gas lasers and laser diodes as optimal light sources. It also discusses single-mode optical fibers and photodiodes for accurate electrical signal conversion.

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    Magnetic Tweezers for the Measurement of Twist and Torque
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    Magnetic Tweezers for the Measurement of Twist and Torque

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    Magnetic Tweezers for the Measurement of Twist and Torque
    11:41

    Magnetic Tweezers for the Measurement of Twist and Torque

    Published on: May 19, 2014

    Area of Science:

    • Optoelectronics
    • Electrical Engineering
    • Sensor Technology

    Background:

    • Magneto-optical current transformers offer non-contact current measurement.
    • Selecting appropriate components is crucial for transformer performance.

    Purpose of the Study:

    • To describe and evaluate essential components for magneto-optical current transformers.
    • To identify suitable light sources, optical fibers, sensors, and signal converters.

    Main Methods:

    • Component suitability analysis for magneto-optical current transformers.
    • Evaluation of He-Ne gas lasers and laser diodes as light sources.
    • Assessment of single-mode optical fibers for polarized light transmission.
    • Description of fiber coil sensors and P-I-N photodiode signal conversion.

    Main Results:

    • He-Ne gas lasers and laser diodes are identified as suitable light sources.
    • Single-mode optical fibers effectively transmit polarized light without depolarization.
    • A fiber coil serves as a reliable measuring sensor.
    • P-I-N photodiodes and analog circuits successfully convert optical signals to electrical signals.

    Conclusions:

    • The described components are suitable for constructing effective magneto-optical current transformers.
    • Component selection directly impacts the accuracy and reliability of current measurement.