MACHINE

Machine

A machine is an equipment which converts one form of energy into another form.

1.AC machine

2.DC machine

Irrespective to AC and DC a machine mainly consists of 2 parts

1.ROTOR: It is the rotating part of a machine.This rotation is due to the interaction between windings and magnetic filed and the torque produced due to this.

There are different types of rotors

-Slip ring Rotor

-Squirrel cage Rotor
-Wound Rotor
-Salient pole Rotor

2.STATOR:It is the stationary part of a machine.The main parts of a stator are
-Stator frame
-Stator Core
-Stator windings

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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.

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...

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