(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The rotor of a 3 phase 60hz 8-pole induction motor takes 220w @ 3hz. Find the rotor speed and the rotor copper losses.

2. The attempt at a solution

I have found the rotor speed by using the equation slipspeed = fr(120)/P = 3hz(120)/8 = 45 rpm then finding nsync by 120(60)/8 = 900rpm so rotor speed = 900-45 = 855rpm. Slip can also be found to be 5% from this. I am stuck at trying to find the rotor copper losses though. I thought that it was just the 220w but that seems to easy. I would appreciate any help with this problem. Thank you.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Question on induction motor rotor copper losses

**Physics Forums | Science Articles, Homework Help, Discussion**