[HN Gopher] R-Core Transformers
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       R-Core Transformers
        
       Author : peter_d_sherman
       Score  : 34 points
       Date   : 2023-04-16 02:51 UTC (20 hours ago)
        
 (HTM) web link (www.custommag.com)
 (TXT) w3m dump (www.custommag.com)
        
       | musictubes wrote:
       | I have yet to get a straight answer on what the actual
       | benefits/trade offs are with R, C, and EI cored transformers as
       | well as torroids. My only exposure to these are as output
       | transformers on tube amplifiers. There is plenty of debate on
       | forums but would love to hear from an engineer about what type
       | works best in which situations.
        
         | ofalkaed wrote:
         | Given your name, the practical answer is that there is no
         | difference assuming they are properly selected and implemented
         | in the circuit. The exception being the EI core and SE outputs,
         | EI cores were the only ones made with airgaps last I was paying
         | attention. Audio is just not as picky as some would like to
         | make it out to be, sure a torroid in the power supply will let
         | us get away with a more compact layout and make it easier to
         | get the noise specs we want but it is not that difficult to do
         | with an EI core. When you get down to it, they are each
         | different in some vague but highly marketable way.
         | 
         | Edit: I am over simplifying things, there are differences but
         | my point is that in audio work the design execution is what
         | matters.
        
         | mk_stjames wrote:
         | In addition to the lower flux leakage as mentioned in this
         | article, there is a benefit of R-core and toroidal transformers
         | which is reduction in the strains due to magnetorestriction
         | that happens, which is what can make transformers- especially
         | cheaply made EI-core transformers- have "hum" at 2x the AC
         | fundamental frequency (e.g. 100 or 120hz for mains powered
         | devices).
        
         | KRAKRISMOTT wrote:
         | Power loss, EM interference, and probably some impedance and
         | frequency response characteristics too (not sure about the last
         | two)
        
       | KRAKRISMOTT wrote:
       | Grandpa's transformers don't come with huggingface emojis
        
       | empyrrhicist wrote:
       | I thought this was going to be about an implementation of
       | transformer models in pure R and I wondered... why?
        
         | drdeca wrote:
         | I thought it was going to be about implementing transformer
         | models in a way that fits well with some special kind of
         | hardware like those green arrays or whatever they are called
         | (the low energy use, highly parallel (but maybe low clock
         | speed?) ones)
        
         | Stratoscope wrote:
         | Meanwhile, I was so happy to finally see an article about
         | transformers that is really about _transformers_ and not some
         | programming thing.
        
         | SubiculumCode wrote:
         | I thought it was maybe something like:
         | https://rpubs.com/eR_ic/transfoRmers becoming a core R package,
         | and I was like, okay why?
        
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