Action Of Commutator
It is seen that, the e.m.f. induced in the conductors is always sinusoidal and commutator converts this sinusoidal e.m.f. to unidirectional e.m.f.…
Transformer Interview Question Part 4
Q. What are the advantages of parallel operation of transformers? A. 1) To maximize electrical power system efficiency: Generally electrical power transformer…
Construction Of Three Phase Synchronous Motor
Similar to d.c. machine where there is no constructional difference between a generator and motor, There is no difference between the construction of…
Principle Of Working Of 3-Phase Synchronous Motor
Synchronous motor works on the principle of the magnetic locking. When two unlike poles are brought near each other, if the magnets…
Construction Of Single Phase Induction Motor
For general lighting purpose in shops, offices, houses, schools etc. Single phase a.c. supply is commonly used. Hence instead of d.c. motors,…
Methods Of Starting Synchronous Motor
As seen earlier, synchronous motor is not self starting. It is necessary to rotate the rotor at a speed very near to…
Condition Of Maximum Torque In Three Phase Induction Motor
From the torque equation, it is clear that torque depends on slip at which motor is running. The supply voltage to the…
Conductivity And Resistivity Of Semiconductor Materials
The value of conductivity of a material gives us an estimate of the extent to which a material supports the flow of…
Torque And Speed Equations Of Dc Motor
Before analysing the various characteristics of motors, let us revise the torque and speed equations are applied to various types of motors.…
Power Flow In An Induction Motor
Induction motor converts an electrical power supplies to it into mechanical power. The various stages in this conversion is called power flow…