exam3a - EE321 Exam 3A Spring 2004 Name Student ID...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: EE321 Exam 3A Spring 2004 Name: Student ID: Instructions: Work ALL Problems. Basic Problem 1 (11 pts) – Discrete Winding Function The number of conductors in the slots of a machine is given by [ ] 5 5 10 5 5 10 5 5 10 5 5 10 − − − − − − = as N How many poles the machine have ? Compute the winding function. Basic Problem 2 (12 pts) – Inductance Between Distributed Windings The winding function of two stator windings may be expressed ) cos( 12 s as w φ 4 = and ) 6 / 4 cos( 12 π φ − = s bs w . The radius and length of the machine are 5 cm and 20 cm, respectively, and the machine has an effective air gap of 2 mm. Determine the mutual inductance between the two windings. Basic Problem 3 (12 pts) – Rotating MMF The winding functions of the stator winding of a 2-phase machine are given by ) 8 cos( 5 s as w φ = and ) 8 sin( 5 s bs w φ − = . The stator currents are of the form ) 20 sin( 10 t i as = and ) 20 cos( 10 t i bs − = . The machine has an airgap of 2 mm. Express the B-field in the air gap do to the stator currents as a function of...
View Full Document

{[ snackBarMessage ]}

Page1 / 3

exam3a - EE321 Exam 3A Spring 2004 Name Student ID...

This preview shows document pages 1 - 3. Sign up to view the full document.

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