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previous: Fred Hammon hewo.Not all steels are equal w... -- 5/7/2004 5:21 AM View Thread

Re: coupling magnet to adjustable polepieces

5/7/2004 4:06 PM
Dr. StrangeloveRe: coupling magnet to adjustable polepieces
Fred Hammon wrote:
quote:
"There are special alloys of cold rolled, grain oriented, silicon steels that are engineered to function in high frequency aplications with a minimum of core loss due to hystersis."
 
 
For the sake of discussion, let's assume that an Alnico 5 rod (5/8" x 3/16" dia.) induces a generous 7000 gauss where is touches the steel plate.  
 
The hysteresis losses in the steel would be calculated from an average +/- 50 gauss dipole in the vibrating string (100-10kHz) on top of that 7000 gauss bias.  
 
In this case, would you select steels for the squareness of their hysteresis plot? Which steels look good at the field strengths mentioned?  
 
-drh  
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Replies:
Fred Hammon I'm not so sure you can calculate t... -- 5/7/2004 6:08 PM