abet_solution - EE321 Spring 2004 ABET Exam Solution...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
This is in A, or At Ni 210.085 = Ni Φ max R total := Φ max B max A := B max 1.1 := R total R center R edge + R center_air + R edge_air + := R edge_air R center_air := R center_air g µ 0 A := R edge R center := R center d s µ 0 µ r A := A π r c 2 := Let's begin by computing the cross section area (center post or outside) Problem 1 - Part B. t e 1.623 10 3 × = t e r c w s 2r c 2 c w s + w s 2 + 1 2 + := π r c 2 ⋅π r c w s + t e + () 2 r c w s + 2 = In order to achieve the same areas Problem 1 - Part A. µ r 1000 := g. 1 m m := w s 2cm := µ 0 4 π 10 7 := d s := r c 1cm := mm 0.001 := cm 0.01 := Problem 1 EE321 Spring 2004 ABET Exam Solution
Background image of page 1

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

View Full DocumentRight Arrow Icon
Problem 1, Part C. The volume of copper will be: V cu d s π r c w s + () 2 r c 2 pf = The area of the copper will be A cu d s w s pf N = The length of the copper will be L cu V cu A cu = L cu d s π r c w s + 2 r c 2 pf d s w s pf N = L cu π 2r c w s + N = The resistance of the copper will be R cu ρ L cu A cu = R cu ρπ c w s + N d s w s pf N = R cu c w s + N 2 d s w s pf =
Background image of page 2
P loss r a T estar L af i f 2 r f i f 2 + = So the loss becomes i a T estar L af i f = To achieve the desired torque P loss r a i a 2 r f i f 2 + = Now the loss is given by T e L af i a i f = We know Problem 3 T e 2 x 4 3 λ as 3 2 λ as ⋅λ bs + 7 2 λ bs + = And so W f 4x 2 + () 4 3 λ as 3 2 λ as bs + 7 2 λ bs + = Thus W f2 2 + 7 2 λ bs 2 2 λ as bs + = Bring up the second flux linkage W f1 2 + 4 3 λ as 3 =
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the 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.

Page1 / 10

abet_solution - EE321 Spring 2004 ABET Exam Solution...

This preview shows document pages 1 - 4. Sign up to view the full document.

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