I have googled this without finding a satisfactory answer. How long does it take a well-magnetised Alnico magnet to loose magnetism once its keeper/armature is removed? The question arose from a discussion the wise Steve Kurt about removing the armatures from old permanent magnet generators – specifically old Sturmey Archer Dynao Hubs. I vaguely remembered ...
from ElectronicsWeekly http://www.electronicsweekly.com/blogs/engineer-in-wonderland/de-magnetising-conundrum-2016-05/
No comments:
Post a Comment