Answer Posted / t eswara rao
PMG means Permanant Magnet Generator.
In erlier days, we use DC supply for excitation supply. But
there were occations of this DC supply failures.
So now we are using PMG. It is having permanent magnetic
poles on its totor. It means the magnetic flus is
independant of external DC supply. The voltage produced in
stator is directly proportional to the RPM of its rotor.
By implementing PMG we have avoided 1. carbon brushes. 2.
External DC supply.
Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
You are of electrical field and you are going for software? Why
apti mainly on logical reasoning, verbal and non-verbal ability (70 percent) and remaining technical. I was in ee but technical had mech ques like on turbines and welding.
What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection
advantage and disadvantage of team work?
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
Where can i get practical knowledge of solar system?
how can calculate 1kva generator running time in 1 liter keroscene
if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to improve a power factor is secondary should kept negative to improve it primary side means is -.90 became +.90 at other side
7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
what is the function of Moulded case circuit breaker, why it is called Moulded?
Draw a SLD of DG distribution up to main LT panel?
WHAT ARE THE EFFECTS OF SERIES RESONANCE AND PARALLEL RESONANCE ON THE CIRCUITS PARAMETERS?
What is earth?
I want to design a heating coil of 80/20 nicrome for 3.5KW please give me the calculations choosing for physical dimensions assume coil voltage will be 110V AC assume necessary conditions
Difference between ac parallel circuit and ac series circuit?