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From: john larkin <JL@gct.com>
Newsgroups: sci.electronics.design
Subject: Re: big L
Date: Sat, 21 Dec 2024 11:33:57 -0800
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On Sat, 21 Dec 2024 11:11:58 -0500, legg <legg@nospam.magma.ca> wrote:

>On Sat, 21 Dec 2024 14:28:52 +0000, Martin Brown
><'''newspam'''@nonad.co.uk> wrote:
>
>>On 17/12/2024 14:58, john larkin wrote:
>>> What's the biggest inductor, the most Henries, that you know of? I
>>> seem to recall some audio transformer that was something like 100 H.
>>
>>I think the Fermi Lab's Tevatron magnet at 1000H and 1500A is one of the 
>>largest ever made but some of the latest GW class mains substation 
>>transformers must have similar levels of inductance and stored energy.
>>
>>See: 
>>https://electronics.stackexchange.com/questions/303320/what-is-the-largest-inductance-value-ever-attained-in-henries
>
>Transformers don't store energy - large L has no particular benefit 
>in their design, save limiting magnetizing current to below a 
>certain acceptable level.

An isolated flyback power supply transfers all its power via energy
stored in the transformer.