Re: Thoughts on running 50/60 Hz SMPS on 400 Hz


"Dave"

I need to use some equipment in an aircraft which only has a 400 Hz supply.
My believe is that a switch mode power supply should not really care too
much if the supply frequency is higher. Anyone any experience of using
normal 50/60 Hz SMPS's on 400 Hz?


** So your idea of a " normal " SMPS is what ??

One that has no PFC circuit ?

That could become a big problem if not designed for a frequency 8 times
higher than usual.

Also, 400 Hz and its harmonics are far more likely to become injected into
places you don't want them by induction and capacitive coupling than 50 Hz.

Maybe you can rig up a temporary 400Hz (at 230 volt ?) supply - using an
audio power amp and a mains transformer (operating in reverse) to see what
happens with your particular gear.


....... Phil


.

Relevant Pages

  • Thoughts on running 50/60 Hz SMPS on 400 Hz
    ... I need to use some equipment in an aircraft which only has a 400 Hz supply. ... My believe is that a switch mode power supply should not really care too much if the supply frequency is higher. ...
    (sci.electronics.design)
  • Re: Thoughts on running 50/60 Hz SMPS on 400 Hz
    ... My believe is that a switch mode power supply should not really care too much if the supply frequency is higher. ... SMPS, many of them rectify the incoming line voltage to DC, filter it roughly with capacitors, then chop it back to AC at 20 Khz or more. ...
    (sci.electronics.design)
  • Re: Thoughts on running 50/60 Hz SMPS on 400 Hz
    ... Jim Thompson wrote: ... My believe is that a switch mode power supply should not really care too much if the supply frequency is higher. ...
    (sci.electronics.design)
  • Re: Thoughts on running 50/60 Hz SMPS on 400 Hz
    ... My believe is that a switch mode power supply should not really ... care too much if the supply frequency is higher. ...
    (sci.electronics.design)
  • Re: More elecrical controversy
    ... But a rule of thumb is that a switch mode supply will weigh less than 1kg per 100 watts. ... If the PSU is built inside the equipment there's no easy way other than knowing about the stuff and taking it apart to have look. ... And then plug one of those RCD testers into a socket onboard and press the button and see if the RCD trips. ... It will not test whether it's purpose is being negated by the actions of AC currents/voltage from switch mode power supplies and such like. ...
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