Removing the big heavy iron-cored transformer? Ability to vary the output voltage electronically?
Led strips on shelves
- Thread starter 23vc
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Switch mode supplies often change their output frequency with load as well so if it complies with the definition of a transformer at one load it wouldn't at another.
I think we can safely say that transformers are still wound devices on a core. (Not necessarily ferrous, HF transformers can use air cores).
I think we can safely say that transformers are still wound devices on a core. (Not necessarily ferrous, HF transformers can use air cores).
You can, in complete safety. Not always correctly though.
They contain ... WHAT?
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We know what they contain, but that is not what they are.
I'm not convinced you do.
Removing it? As I thought I said, my point was that if "everything were done at 50Hz", in most cases one would have to have just as big a transformer as would be needed if you didn't bother about the PWM bits, wouldn't one.
Kind Regards, John
Perhaps we can call them electronically controlled transformers.
Would you include a 'traditional' regulated PSU (containing a 50Hz transformer) in that definition?
Kind Regards, John
Does it alter the voltage?
What does 'regulated' (as in "regulated power supply") mean to you (assuming that the input voltage may vary)?
Kind Regards, John
If the input varies and the output is constant, isn't it being transformed and does it have electronics?
Quite so, but you'd never find me (or many other people with technical knowledge) calling it "a transformer" (even an 'electronically controlled' one) just because one can find a way of justifying that in terms of dictionary (or other) definitions. As far as I (and, I suspect, many others) am concerned, a PSU is a PSU.
As I think many/most of us actually believe (but few seem prepared to admit), IMO winston is right - but I just wish he would stop going on about it (and the other bees in his bonnet), since it's very tedious/annoying, confuses many of the forum members and is never going to achieve anything. However, given the very-long-established meaning of "transformer" in the fields of engineering and electronics, it really made no sense for some parts of industry to start using the word (concurrently) to refer to something else in those same fields, particularly since perfectly reasonable well-established terminology (PSU) was available. I've been doing things with PSUs, some of them 'switch-mode', for decades, but (no matter what dictionaries may say) I'd never come across anyone even dreaming of calling them "transformers" before the lighting industry started doing that (and it has 'spread' a bit since).
However, as I said, absolutely nothing is gained by winston re-starting this discussion at every possible opportunity. No-one is going to reverse these (IMO regrettable) changes in language which have arisen.
KInd Regards, John
But don't you agree that not correcting someone when they use the wrong word is going to make it spread even more?
If we all make the effort to only use the right term perhaps it will eventually get back to the manufacturers marketing people who (may) learn.
If we all make the effort to only use the right term perhaps it will eventually get back to the manufacturers marketing people who (may) learn.
I'm surprised at you, John, saying that when you have frequently defended the actual misuse of ordinary words on the grounds that the language 'evolves' and, in any case, we know what they mean.
Yet in terms of manufacturing and technology progression, a name should only apply to the design and method in use when it was invented.
So, it may literally be a transformer but due to evolution of the language but not engineering, we shall never know.
Yet in terms of manufacturing and technology progression, a name should only apply to the design and method in use when it was invented.
So, it may literally be a transformer but due to evolution of the language but not engineering, we shall never know.
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