P.9 – A three-phase induction motor has the following parameters: P. = 20CV (1CV = 736W), Uc, = 380V , f=50Hz, 4 magnetic poles (p=2), P,=400W, and works at its rated power with a slip of s„(%)=5%. For this specific condition of rated power calculate: a) - the internal power (P;) b) - the torque available at the shaft (T. ) c) - the rotor copper losses ( Pc,)

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection a…