lecture-11-28 - 11/28/2011 ME-340 Tentative class forecast...

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11/28/2011 1 ME-340 Circuits & Mechatronics Lecture # 36 2010.11.28 Tentative class forecast Week 11/28 Finish Ch 15, Parts of Ch 16 Fr. Quiz on Ch 14 Final exam on Th 12/8 7-10pm , chapter 15, parts of chapter 16 2 Reminder Problem Homework (Due We 11/30 in class) Hambley 5 th Edition, Ch. 15, Problems Magnetic materials: 15.53, 15.54 Ideal transformers: 15.65, 15.66 3 Review Sessions This Wednesdays, 3-4 ETC 2.108 New Tuesday Dec. 6 th , time to be confirmed 4
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11/28/2011 2 Movie 5 http://www.youtube.com/watch?v=CJOubyiITsE Recap last weeks 6 Magnetic Fields, Flux & Flux Density Source of magnetic field: electric charge in motion Magnetic fields surround permanent magnets & currents Field visualized as lines of magnetic flux B u f q f quB sin   Lorentz Force: Charges Moving in Magnetic Fields B = magnetic flux density Lorenz magnetic force
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11/28/2011 3 Magnetic Flux 9 A B d A B = Magnetic flux density Φ = Magnetic flux Lines of flux indicate intensity & direction of B field A B d A N Flux Linkages N : number of turns in coil B : magnetic induction or flux density [T] Tesla = Wb m -2 : magnetic flux [Wb] Weber = Volt sec A : area of flux linkage accumulation Λ: Weber-turns dS S B Faraday & Lenz Laws Faraday’s law: voltage
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This note was uploaded on 02/07/2012 for the course M E 340 taught by Professor Staff during the Spring '08 term at University of Texas at Austin.

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lecture-11-28 - 11/28/2011 ME-340 Tentative class forecast...

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