Homework Help: Induction motor equations question

1. Jun 27, 2015

theone

1. The problem statement, all variables and given/known data

I came across these two equations in a chapter on induction motors, and I was wondering if they both calculate the same thing?

$w_r=sw_s$
$w_r=w_s - \frac{p}{2}w$

2. Relevant equations

3. The attempt at a solution
s is the slip, $w_r$ and $w_s$ are the rotor and stator speed

2. Jun 27, 2015

insightful

By stator speed, I assume you mean the synchronous speed of the rotating field. I take slip to be:

s = 1-wr/ws.

and usually X100 for %slip.