what happen when dc shunt motor field is sudden open in
running condition
Answer Posted / andrew cottrell
Of course, the proof of the pudding is in the eating. One has to experiment & see.
But I would guess that the motor would NOT necessarily speed up. Because the motor is coupled to a driven machine which provides a resistance to speed change. I think that the danger lies in a transient over voltage due to the collapse of the flux. This could stress the insulation, and/or cause a flash over across the mica, and therefore between brushes... BUT, I don't know!! I am guessing!
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
how we do Vector group ,magnetic balance and tap changer test in Transformer?
How to calculate that clean water supply in one Day from 150 KLD STP?
How much dc volt applied in cathodic protection system?
what is saturation kit?which use above 15 kw motors panel side.
What is formula calculation size cable wire ?
What are the types of instrument transformer?
Why a tesa lamp is glow between two phase?
How does cost of generation from hydropower plant compare with other sources of electricity?
How to select a cable size for particular load?
What is the ratio of true power to apparent power in an ac circuit?
what is the function of gss in the dg set.
list of tests to be carried out at manufacturers end while purchasing a step up transformer of 11kv to 66kv ,2MVa Capacity.
EXPLAIN THE WORKING OF SERIES REACTOR IN HT CAPACITOR BANKS (FOR VOLTAGES & CURRENTS)
for compensate 315mh inductance ,how many capaciance required?
in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?