Join TSR now and get all your revision questions answeredSign up now

DC motors. Any electircal engineers or physics guys that can help? Watch

    • Thread Starter
    Offline

    2
    ReputationRep:
    Anyone know how to start this one off. Lost all my notes on dc motors.

    Q) A 240V dc shunt motor has an armature and field resistance of 0.2 ohms and 320 ohms respectively. The motor drives a load at a speed of 950 rev/min and the armature current is 50A. Assuming that the flux is directly proportional to the field current, calculate the additional resistance necessary in the field circuit to increase the speed to 1100 rev/min while maintaining the armature current constant.
    • Thread Starter
    Offline

    2
    ReputationRep:
    Really, no one in the whole of tsr know?
 
 
 
Poll
How are you feeling about Results Day?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.