ECE-105 Chapter Notes - Chapter 17: Reluctance Motor, Angular Velocity, Squirrel-Cage Rotor
Document Summary
Make up majority of applications that call for motors with a power rating over 5hp industrial applications. Rotating stator field stator windings of three phase induction machines set up magnetic poles that rotate around the circumference of the stator. Total number of poles p is always even. Synchronous speed p-pole machine, field rotates at an angular velocity of: In rpm the synchronous speed is consists of a system of p magnetic poles that rotate at a synchronous speed. The field when set up by stator windings. Squirrel-cage induction machines: squirrel-cage rotor is the least expensive and most rugged form of three phase induction machine. Rotating stator field induces voltages in the rotor conductors which results in currents that produce magnetic poles on the rotor. Interaction of the rotor poles and stator produces torque. Slip and slip frequency: we denote the mechanical speed of the rotor as *m (or nm).
