dc shunt motors

**gurpreet_leh** · Nov21-09, 02:16 PM

how dc shunt motors are different from the simple dc motors and is there any relation between between generators

**berkeman** · Nov21-09, 03:18 PM

Originally Posted by gurpreet_leh

how dc shunt motors are different from the simple dc motors and is there any relation between between generators

Welcome to the PF. What is the context of your question? What are you going to use this motor for?

**Bob S** · Nov21-09, 11:23 PM

The attached URL has torque vs RPM curves for four different types of dc brush motors, the most common of which are the shunt wound, the series wound, and the permanent magnet. The shunt wound dc brush motor has the flattest torque curve. See
http://www.reliance.com/mtr/mtrthrmn.htm
Bob S

**Phrak** · Nov21-09, 11:48 PM

Originally Posted by Bob S

The attached URL has torque vs RPM curves for four different types of dc brush motors, the most common of which are the shunt wound, the series wound, and the permanent magnet. The shunt wound dc brush motor has the flattest torque curve. See
http://www.reliance.com/mtr/mtrthrmn.htm
Bob S

I took a quick glance at the link. Why is the shunt wound DC motor speed-torque curve different than a permanent magnet motor. I find this suprizing. Both would seem to have a constant applied flux. Do you happen to know?

**Bob S** · Nov23-09, 12:50 PM

Originally Posted by Phrak

I took a quick glance at the link. Why is the shunt wound DC motor speed-torque curve different than a permanent magnet motor. I find this suprizing. Both would seem to have a constant applied flux. Do you happen to know?

I saw that, and was also puzzled.
Bob S