how to start shunt moter
Answers were Sorted based on User's Feedback
Answer / rathish
In any DC motor the speed depends inversely on the flux.
Consider when starting a series motor the current flowing
will be high, but the flux that the motor produces will be
moderate since the series winding has less number of turns.
If u start the motor without load the speed will increase.
as speed increases the back emf increases. this decreases
the current through the series winding and hence flux
decreases and the speed further increases. Theorerically
speaking the speed becomes infinite. But practically the
motor will accelerate to very high speed , which will damage
the motor. But if you start the motor with the load, you are
actually reducing the starting speed hence the motor runs
safely. Since series motors has this property it is used in
trains to pull high load.
shunt motor starting torque is
marginal and hence it should be started with least load.
Is This Answer Correct ? | 0 Yes | 0 No |
Please till me about Rajbhasa
sir please send me the last 5 years rrb solved question papers my email id: hariraman_ece@yahoo.com
Respected Sir, I am preparing for J.E(mechanical engg) of RRB Ajmer.Please send me all RRB Chennai solved paper in the year of 2004 to till date. My email id is sheel.saini@yahoo.co.in Thaks & regards vikas saini
can u send to me logo pilot questions?
The colour of light is determined by its (a) velocity in air (b) amplitude (c) state of polarization (d) frequency
i need rrb chennai JE mechanical last 2 year question papers Plz send me on this email id frndforever16@yahoo.com
A group of 1200 persons consisting of Captains and soldiers is traveling in a train. If for every 15 soldiers there is one Captain, then the number of Captains in the group is (1) 70 (2) 75 (3) 80 (4) 82
Respected sir i have to give the written exam of RRB..and i dont have time for the preparation...so plzz..send me last year question papers...so that i can do good and qualify the exam...to my id nibharai.rai@gmail.com...i'll be be thank ful to u...thanx...
RRCNR.ORG RESERVE RECRUITMENT 2012
Rrb group c result 2020
i want to RRB Patna state non technical previous papers. i have to write a exam in 9 th December 2007 urgent?
please send rrb junior engineer post qustion paper