HW5 - (This is for normal step operation). It is desired...

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

View Full Document Right Arrow Icon
EE321 Spring 2012 Homework 5 Problem 1 – Torque Versus Position Trajectory Consider the torque versus position characteristics of a VR stepper shown below. Initialize the c-phase is energized and the position is as indicated (point 1). Then the position is stepped to the b-phase. Circle the resulting stable equilibrium point and mark with a 2. Then the a-phase is excited. Circle and mark the stable equilibrium point with a 3. Continue in this fashion as the c-phase, b-phase, and finally a-phase are each excited a 2 nd time (thus the final point should be labeled 6). Problem 2 – Machine Configuration It is desired that a stepper motor has a step length of 10 degrees.
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: (This is for normal step operation). It is desired that the number of rotor teeth is less than 8 and than that the number of phases is less than 8. Sketch the configuration of such a machine. Your answer should be analogous to Fig 8.2-3 on Slide 13 of the lecture notes. CONTINUED ON NEXT PAGE Problem 3- ECE595 Only A stepper motor has the following flux-linkage equations. 10 5cos(4 ) 1000 10 5cos(4 2 / 3) 1000 10 5cos(4 2 / 3) 1000 rm as as rm bs bs rm cs cs i i i -=--=-+ = where rm is measured in the CCW direction. The machine is stepped in an a-b-c-a-b-c sequence with no load torque. What will be the direction of rotation ?...
View Full Document

This note was uploaded on 02/19/2012 for the course ECE 321 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

Page1 / 2

HW5 - (This is for normal step operation). It is desired...

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