Recent content by swayam007

In dc motors, speed can be increased by weakening or decreasing the field flux. The mathematical explanation is --- Speed is inversely proportional to flux. But why is it so? Should not it be that when flux decreases torque decreases which is driving the motor. Now decrease in Torque should...

Is it possible to construct Nyquist plot from polar plot (ω varies from ∞ to 0) ?

Consider 2 cases case 1: no of rotor poles = 2 no of stator poles =4 case 2: no of rotor poles = 4 no of stator poles =2 What will happen in case 1 & 2 ? Will Induction motor run?

In a 3 phase slip ring Induction motor, 3 phase balanced supply is given to rotor winding & stator winding is short circuited . Then rotor would - run against the direction of rotating field. Can anyone explain this phenomenon?

Why is it that the air gap flux density is flat topped at no load. What happens to it's shape when machine is loaded?

why poles of machine are always even?

Homework Statement Cold-roiled steel of high silicon content enables the designer to use higher operating flux densities with lower loss per kg. The higher flux density reduces the weight per kVA. Can anyone explain how & why does weight/KVA depends on flux density Homework Equations...

I have a doubt regarding this equation; when a capacitor starts charging, it allows the current to pass . current keeps on decreasing till the capacitor is not charged. now this time (time within which capacitor charges is called transient period) ; time after transient period is called steady...

Xc = -j/(wC) Xc = reactance offered by Capacitor & w = 2*pi*f since f=0 , for dc . Xc = infinite

actually It is about a Galvanometer in a balanced wheatstone bridge . Current passing through it & Voltage across it is zero. Is it open circuit or short circuit?

When Voltage across two points is 0 & current flowing through that connection is 0. Is it a short circuit or open circuit?