Explain the terms dielectric constant and dielectric loss, Electrical Engineering

Assignment Help:

Explain the terms dielectric constant and dielectric loss.

Dielectric Constant or Permittivity: all insulating materials possess an electrical capacitance. The capacitance of unit based upon dimensions and type of dielectric placed among the capacitor plates. The capacitance of a parallel plate capacitor may be computed from the formula C =∈ A/t, here ∈ is the permittivity of the material in F/m, A = Area of the plates and t = thickness of dielectric. And ε = C / C0, here C is the capacity in presence of dielectric and Co is the capacity in air or vacuum or in absence of dielectric.

Therefore permittivity ∈ of a material is a measurement of capability of it to form an electrical capacitance of the insulating material, the dimensions of the capacitor being taken equivalent. Dielectric constant or permittivity is not a constant although varies with temperature and frequency.

Dielectric loss angle:  While an insulating material is subjected to alternating voltage, several of the electric energy are absorbed through the insulation and are dissipated as heat. Energy absorbed through the material in unit time is termed as dielectric loss. A perfect dielectric has a current that leads the voltage by 900, although the practical dielectric material has a current that leads the voltage by less than 900. The dielectric phase angle is θ and δ = 900 - θ is the dielectric loss angle.

500_the dielectric loss angle.png

Also I is the phasor sum of Id and Ic , here Ic is the conduction current that is in phase with applied voltage and Id is the displacement current that is in quadrature phase along with applied voltage.


Related Discussions:- Explain the terms dielectric constant and dielectric loss

Analog Fundamentals, Module 1 Discussion: Application of operational Amplif...

Module 1 Discussion: Application of operational Amplifier

Bcd to excess 3 code converter, What are the industrial applications of the...

What are the industrial applications of the project bcd to excess 3 code converter?

Find the power factor and current of the machine, Two identical three-phase...

Two identical three-phase, 33-kV, wye connected, synchronous generators operating in parallel share equally a total load of 12 MW at 0.8 lagging power factor. The synchronous react

Passive filters, Passive filters: Passive implementations of linear fi...

Passive filters: Passive implementations of linear filters are based upon combinations of inductors (L), resistors (R), and capacitors (C). These sorts are collectively termed

Determine the frequency of the rotor voltages, A three-phase, wound-rotor i...

A three-phase, wound-rotor induction machine, with its shaft rigidly coupled to the shaft of a three-phase synchronousmotor, is used to change balanced 60-Hz voltages to other freq

For the given circuit determine voltage, Q. For the circuit shown in Figure...

Q. For the circuit shown in Figure, determine v out (t).

Live human detection robot, which simulation software is better for this p...

which simulation software is better for this project, and how can i simulate it?

Machines 1, diagram of armeture reaction

diagram of armeture reaction

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd