Lecture 7

Induction machines: variable working point and variable speed control 

Homework  after tutorial 4 and before lecture 7 

1- Re-do problem(s) done in class and make sure you know how to solve 2.12, 2.18 and 2.19. Solve as well as other problems.

2- Read:

alt. 1 compendium

Revision: starting of IM, sections 2.7.1 and 2.7.2 pp2-21 to 2-24,

New: sections 2.9 to 2.11  pp 2-27 to 2-37 (section 2.11 had to be read for lab 1)

alt. 2 [SEN] sections 5.11 to 5.13 pp 248-270 and chapter 7 about single phase IM section 7.1 is enough, but interesting until section 7.3 (out of scope course though!). OBS nothing about unbalanced voltages in this book so check compendium

alt. 3 [FIT] does not cover all parts of compendium but following pages could be studied (V/f control and field weakening are missing)

pp340-348 rotor resistance, pp201-202 +/- waves of single-phase winding, pp452-455 single-phase IM, pp471-473 unbalanced (diffrent from compendium), pp595-603 rotor and voltage influence on working point

3- Watch [DELFT] lecture 8, slides 17 to 35.