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Semiconducting Transformer

  [vote for,

[not really magnetism, but there's loads of 'energy:blah' categories but not one of them is 'energy:electrical' - clearly it hasn't been discovered yet]

A typical transformer has a laminated core. The square sort of transformer that people are used to seeing has a stack of interfitting E shaped, or square shaped slices, glued together (better management of counteracting eddy currents than there would be if it were a solid iron core, although that'd work too, as crude transformer).

The glue layer (varnish or lacquer usually, and insulating) could be replaced with an intentionally semiconducting layer, resulting in stacks of conductor- semiconductor etc. It could also be a capacitance dielectric, so you'd end up with a stack of a combination of conductor-semiconductor/capacitor etc.

Fuck knows what it'd do.

Ian Tindale, Feb 18 2017

Here's one (an older HB Idea) Switcheroo_20Power_20Supply
Transforms current and voltage without a transformer; uses lots of transistors (which are semiconductors) [Vernon, Feb 18 2017]

Sine wave https://en.wikipedia.org/wiki/Sine_wave
Predictable [8th of 7, Feb 20 2017]

Fig 4 http://www.industri....com/epst-3e_6.html
[bs0u0155, Feb 20 2017]

Constant Voltage Transformer http://www.circuits...voltage-transformer
Related technology [csea, Feb 20 2017]


       // Fuck knows what it'd do //   

       Before or after it overheats and bursts into flame ?
8th of 7, Feb 18 2017

       We ought to find this guy Fuck. From what I've heard he's one smart cookie.
MaxwellBuchanan, Feb 18 2017

       Designing the flow of the electrons, and their associative magnetic fields, more sharply will engineer better transformers. Less heat, less loss. I would think semiconductors is partly the answer.   

       A stack would be a bit simplistic, though. Not 3D enough.
wjt, Feb 18 2017

       Semiconductors per se can only lead to more power dissipation: you either want zero resistance (hence zero power dissipation, regardless of current) or infinite resistance (hence zero current, and hence no power dissipation).   

       So, what use could semiconductors be? Their only advantage will be their ability to switch from low to high resistance rapidly. This might, possibly, be useful if synchronized with the AC power supply, and controlled spatially as well as temporally. It might also be useful if conductivity was controlled spatially and modulated according to the load.   

       In other words (it's OK, I have some spare ones that I have to use up soon) - it should be possible to design a regular iron-cored transformer which is optimal for a given power load, and for a given point in the power cycle. Semiconductation might allow you to remodel the transformer on the fly, so that it was always optimal. Of course, it would have to be very small if it were on a fly.
MaxwellBuchanan, Feb 18 2017

       //very small if it were on a fly.   

       "Gauromydas heros (or sometimes Mydas heros). It has been reported to grow to 7cm long."
not_morrison_rm, Feb 18 2017

       Yeah, I bet he says that to all the girls ...
8th of 7, Feb 19 2017

       I can see how this is quite workable actually. Eddy currents are only induced during periods of changing magnetic field. The field is not always changing, or at least not very much. Take a typical sine wave, sure the field is changing some of the time, but it really dwells for manageable periods. Could you make the semiconductor layers non-conductive during the period of change and then conductive for the dwell periods? Non-laminated cores have higher field strengths than the laminated ones, could this be used to have the best of both worlds? From what I can tell, Eddy currents tend to have pretty low voltages, 3-12V for 120V transformers, which is workable for many semiconductors.
bs0u0155, Feb 20 2017

       // the field is changing some of the time, but it really dwells for manageable periods //   


       NO, NO, NO !   

       For a sine wave, dy/dx = 0 only at the two stationary points at the peak and trough, and for a time dt-> 0.   


       Stay behind after class.
8th of 7, Feb 20 2017

       Yes, [8th], but around those points, the field is changing "not very much".
MaxwellBuchanan, Feb 20 2017

       Now, this isn't my specialist subject, but... The change in voltage is not linear with the change in angle. Looking at the voltage in the <link> fig 4, 30-60 degrees gets you a change of 36.6V 1.22V per degree. Now, 60-120degrees gets you +13.3 then -13.3 so a total change of 26.6/60 = 0.44 V/Degree. Now, the magnetic field follows out of phase but you could simply insulate the layers during the periods of maximum magnetic flux, and join the layers during the low periods.
bs0u0155, Feb 20 2017

       It could easily have enough slew to distort from a sine wave to a more waveshaped blunt square-oid, although that too would never actually dwell at the same level for too long (or within a window of level limits).   

       The thing that got me thinking of this (and this isn't how to do that) was imagining an entirely transformer-based transfer resistor (or transistor), which would then become by definition an active current-controlling component instead of the passive one we think of transformers as. A transisting transformer (probably through other antiphase and in-phase taps) might have interesting characteristics as an alternative to valves, bjts or mosfets.
Ian Tindale, Feb 20 2017

       See [link] for a related technology, the constant voltage transformer.
csea, Feb 20 2017

       // Now, this isn't my specialist subject, but... //   


       Tell us, did you chew your lead soldiers when you were a child ? If you did, it would account for a lot ...
8th of 7, Feb 20 2017

       Not soldiers... But there was a lot of solder lying about.
bs0u0155, Feb 21 2017


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