if the back emf eqution for dc motor EB=(QPNZ/60A) THEN
what is the value of A for PMDC MOTOR OR how can dicide the
value of "A"

Answer Posted / gk

A= NO.of parallel paths related to type of winding.
IF machine is having wave connected winding then no.of
parallel paths are 2 always.
If it is lap connected A=no.of poles i.e A=P.
Comments and additions are welcome. TQ

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why high speed tripping relay will be used in tripping circuit why not normal relay

827


Why the field rheostat is adjusted such that the voltmeter reads 380V

1820


What are hrc fuses and where it is used?

731


When is lag lead compensator is required?

636


Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.

1459






what is the transformer turn ratio formula and give some examples?

1925


how a resistor resists to flow the current?how an inductor oppses the sudden change in current?how a capacitor opposes a DC voltage.

2297


What does ampere turns shows?

659


I am going to appear for the RRB Chennai junior Engineer online exam. Please send me the previous exams question papers (also solved) to my mail id: rrkhandhar@yahoo.com

1525


sir, i am 3 years diploma course pass out candidate.what type of certificate can i got in marine service.

1452


how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

1918


upto how many load can v connect to stabilizer which is used for tv

1729


concept of busbar and load dispatching..?

1923


define as synchronous generator

1698


what is the safety points of vaccum circuit breaker.

1638