(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[PLAIN]http://img94.imageshack.us/img94/224/92898534.jpg [Broken]

The figures show two types of magnetic cores that lie along the z-axis. The solid core has length L, radius a, and conductivity σ. Laminated core has N filametary cylinders each with length L and conductivity σ. IfB= B_{o}cosωtais directed upward and the filamentary cylinders fill 90% volume of solid core, find:_{z}

a.) the average eddy-current power loss in the solid core

b.) the average eddy-current power loss in each of the filamentary cores.

c.) the average eddy-current power loss in the total laminated core.

Assume the B-field is uniform throughout both solid and laminated cores.

2. Relevant equations

This is the problem, I don't know what formulas I should be using!

3. The attempt at a solution

Just an attempt, this is probably way off. It I attempt to findJwithin the cylinder, thanJ= σE. I know that ∇xE= -d(B)/dt. This way I can solveE, and plug it into the formula I have started with, giving meJ. What would I do from here though!? Is this even the right way?! Please help! I appreciate all help in advance!

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# Homework Help: Eddy current losses - solid/laminated cores!

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