V. Kishore

4 Questions 14 Answers 0 Followers

Questions related from V. Kishore

Why do induction machines not generate electricity, before its rotor's shaft speed is greater than synchorous speed?

A Synchronous machine can generate electricity even if the speed of the shaft is less than synchronous speed. But an induction machine starts generating only when its shaft is rotated with a speed...

30 September 2014 9,093 6 View

Can we use a buck-boost converter for driving and braking a dc motor?

I want to use a single circuit for accelerating the motor in bi-direction ,and also want the same circuit to provide dynamic braking for the motor. Will a buck-boost converter be helpful when I am...

20 September 2014 4,756 9 View

What are the advantages of sumpners test over conventional "open circuit and short circuit test" on transformers?

Both the tests let us know about the core losses and copper losses in single phase transformer, then why is sumpner's test preferred over "open circuit and short circuit test" ?

05 September 2014 1,290 7 View

Why is it that, there no rotating magnetic field in a 3 phase transformer?

the vector sum of 3 phase flux in an induction motor, at any instance, comes to be 1.5 times the amplitude of the flux in any phase, that keep rotating , so an RMF(rotating magnetic field) is...

23 August 2014 1,826 3 View