Hey! Sign in to get help with your study questionsNew here? Join for free to post
 You are Here: Home

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

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. 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.
2. Really, no one in the whole of tsr know?

Write a reply…

Submit reply

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
that username has been taken, please choose another Forgotten your password?
2. this can't be left blank
this email is already registered. Forgotten your password?
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register
2. Slide to join now Processing…

Updated: April 4, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

### Who would you like to thank?

Poll
Useful resources
Study resources

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

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