Solution Spring 2009 Exam 1

Solution Spring 2009 Exam 1 - ECE 430 Exam#1 Spring 2009 90...

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ECE 430 Exam #1, Spring 2009 Name: _____Solution_________________ 90 Minutes Section (Check One) MWF _______ TTH _______ 1. ________ / 25 2. ________ / 25 3. ________ / 25 4. _________ / 25 Total ________ / 100 Useful information ( 29 ( 29 sin cos 90 x x = - o V ZI = * S VI = 3 3 L L S V I φ θ = 0 180 (lag) 180 0 (lead) θ θ < < - < < o o 3 (delta) 3 (wye) L L I I V V φ φ = = /3 Y Z Z = 7 0 4 10 H/m μ π - = C S da = H dl J n C S da t = - E dl B n l A μ ℜ = MMF Ni φ = = ℜ BA φ = Li N λ φ = = 1 2 M k L L = 1 hp = 746 Watts

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