Skip to main content

DIELECTRIC AND INDUCTANCE

Dielectric:

The word dielectric means nothing but insulator.It means that a dielectric material is something which do not allow the flow of current through it.

Dielectric Strength:

It is defined as the limit of filed strength i.e the property of an insulator that can withstand or oppose the flow of current without breakdown.The breakdown field of an insulator is 10,000 .
That means above this limit of breakdown field the insulator starts conducting the current and behaves as a conducting material.

Inductance:

It is a property of a conductor in which,as the current flowing through it is being changed continuously there will be change in its EMF.The inductance of a material is denoted by letter L and is measured in Henry
These inductance is of two types :

1.Self inductance:

It is the ratio of change of  emf of a circuit to the change of current in the same circuit.

2.Mutual inductance:

It is the ratio of change of emf of a circuit to the change of current in a neighbouring circuit.

Note:Hope you got some clarity i will be back tomorrow with some basic law's of EEE-THANK U

       

Comments

Popular posts from this blog

Application of Artificial Neural Network in Power electronics

 

INDEPENDENT SOURCES AND DEPENDENT SOURCES

Independent sources: There are two types of independent sources they are  Independent Voltage source Ideal voltage source::Load voltage is independent of Load current. Practical voltage source:Load voltage depends on Load current. 2. Independent Current source Ideal current source::Load current is independent of Load voltage. Practical current source:Load current depends on Load voltage.  Dependent sources: The voltage or current of Dependent sources depends on other circuit parameters.There are four types of Dependent sources they are Voltage Control Voltage Source(VCVS):This means that the Voltage Source is depending on other voltage parameter available in the same circuit. Voltage Control Current Source(VCCS):This means that the Current Source is depending on other voltage parameter available in the same circuit. Current Control Voltage Source(CCVS):This means that the Voltage Source is depending on other Current parameter available in the same...

SWITCHING TRANSIENTS IN TRANSFORMER

Switching Transients: The word Transients is always very Scary for me but not any more hahaaa...........what about you???? Well coming to the point...why do these Switching Transients occur in a Transformer. When the switch is closed when the voltage is maximum...then the flux required by the core is zero and the available flux in the core is also zero and hence NORMAL OPERATION is sufficient When the switch is closed when the voltage is crossing zero...then the flux required by the core is maximum but here the avaliable flux in the core is zero and hence TRANSIENT OPERATION is required Here when the Transient operation takes place then the flux doubles gradually and this is known as Doubling Effect of Transformer.This Doubling Effect causes magnetic in rush current and Damage in the insulation. Using Secondary Harmonic Restraining Coil can reduce all these Drawbacks.