Test #2 Study Guide

Test #2 Study Guide - EE 4420 Topics for Mid-Semester Test...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 4420 Topics for Mid-Semester Test 2 I. Rotating magnetic field: - Representation of alternating magnetic field and elliptic rotating magnetic field by two circular magnetic field illustrated by means of magnetic flux phasor diagrams - Conditions for generating of rotating (elliptic) magnetic field and circular magnetic field - Functions that describe alternating magnetic field and rotating magnetic field - Equation for rotary speed expressed in terms of frequency and number of magnetic poles. - Expression for voltage induced in the 3-phase winding of the AC machine. - Conditions for producing of nonzero torque in electric machines. II. Induction Motors 1. Principle of operation of induction machines. Differences in the structure of slip-ring and squirrel-cage motors. 2. Rotor slip equation; relations between: the frequency f 2 and f 1 , voltages E 2o and E 2 ; three modes of operation of induction machine illustrated on the rotor speed and slip axes and relations between stator and rotor frequencies. 3.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online