Which loss in DC machine is maximum?

Answer Posted / saquib

in dc machines the losses are core loss,cu loss,stray loss,
mechanical loss, brush loss.... in which mechanical loss is
maximum.

Is This Answer Correct ?    1 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Please tell me the power flow from pmg to main rotor of an alternator (Including AVR unit)?

1579


i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.

1867


i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.

1463


Define what is the function of anti-pumping in circuit breaker?

697


Assuming that a dedicated neutral earthing transformer is provided for each GT generator, when the two generators are running in parallel, has consideration been given that the earth fault current from one generator stator winding be split between the two neutral earthing transformers? If so, what adverse impact will this have on the operation of the 59N and 27TN devices?

1234






Why is the air gap between the pole pieces and the armature kept very small?

897


what size steel armoured cable is required to support 1500kva capacity. would 70mm squared be enough or would I need 90 or 120mm squared 3c plus earth

993


What is the difference between cylindrical-type and sandwich-type winding?

969


What is meant by stator? What is meant by rotor?

632


in shunt clippers why a resistor is used in sereis with the input

1513


we need a ntpc previous papers

1451


Control cables in S's will carry 1000v which is AC R DC? Pls answer meĀ 

1603


How to megger test 11 kV cable and the acceptance IR value

2447


please send me previose rrb junior engineer qustion papers

1637


Is it possible to connect a safety device in to parallel?

1559