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Tech. Advice: Firefly Engines
Re-magnetising flywheels
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<blockquote data-quote="Magnetoman" data-source="post: 104785" data-attributes="member: 2806"><p>That magnetizer would be hard pressed to do much of anything to an Alnico magnet. Inside the pyramid is a rectifier for the mains voltage and the bulbs are there to dissipate the power in the coils after the voltage is switched off to avoid a big spark. Since all the magnetizer has to work with is the mains voltage, and since I=V/R, the amount of current, and hence the magnitude of the field, it can generate is modest. A tired Alnico magnet will be somewhat better off after using this magnetizer, but worse off than it should be.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 104785, member: 2806"] That magnetizer would be hard pressed to do much of anything to an Alnico magnet. Inside the pyramid is a rectifier for the mains voltage and the bulbs are there to dissipate the power in the coils after the voltage is switched off to avoid a big spark. Since all the magnetizer has to work with is the mains voltage, and since I=V/R, the amount of current, and hence the magnitude of the field, it can generate is modest. A tired Alnico magnet will be somewhat better off after using this magnetizer, but worse off than it should be. [/QUOTE]
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Tech. Advice: Firefly Engines
Re-magnetising flywheels
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