hw4 - the distance between the coils and k is the order of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 610 -HW#4, Due Sept 27, 2011 1. Chapter 1 - 20, 21, 22, 23, 24,26 2. Given a round rotor 2 pole machine shown below In machines literature various authors describe constants of proportionality which include the effects of distributing a winding versus having a concentrated winding. Constants are used to describe the winding pitch factor , the distribution factor , or both together described as the winding factor . The basic objective in the distribution factor analysis is to determine the effect of taking a con- centrated winding with turns, and distributing these turns over n several slots, creating n coils with turns that are series tied, as shown above, where n=3. a) Show that the of the distributed winding is related to the MMF of the concentrated winding by the factor (1) where (2) In (2) n is the number of distributed winding coils,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: the distance between the coils and k is the order of the harmonic MMF that is being considered. coil x y z k p k d k w N s N s n-----MMF MMF dist M conc k dk = k dk k n 2------ sin n k 2--- sin-----------------------= b) The basic objective in the pitch factor analysis is to determine the effect of taking a concen-trated winding with turns, and having it not span a complete pole pitch, but rather short pitching it by degrees (see figure above). Show that the of the short pitch winding is related to the MMF of the full pitch wind-ing by the factor (3) where (4) and is the pitch angle and k is the order of the harmonic. N MMF MMF shp MMF flp k pk = k pk kB 2------ cos = B...
View Full Document

This note was uploaded on 12/04/2011 for the course ECE 610 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

Page1 / 2

hw4 - the distance between the coils and k is the order of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online