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Examination of a 12V power supply with a 216A rating.
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Examination of a 12V power supply with a 216A rating.
Subscribed to my 2nd channel? Watch all my 3 minute videos on Julian's Shorts: https://www.youtube.com/channel/UCeewzdnwcY5Q6gcbnZKIY8g
Interested in my new garden workshop? Follow the entire build on Julian's Shednanigans:
https://www.youtube.com/channel/UCXfDjPehpC7B7lW2JFxeS4w
Join me on Odysee/LBRY: https://lbry.tv/$/invite/ @julian256:d
Octopus Energy referral link: share.octopus.energy/aqua-birch-918
(We each get £50)
#ElectronicsCreators
I use the low tech approach and use Ant powder 🙂 high power ant miners may bring in the coins but leave the shed overrun with the little buggers;-)
twisting electrons around
Does it meet it's 200A rating???? Good video.
Would love to see this loaded up and voltage checked at various loads to see how stable it is. The output of the unit could be (for test purposes) fed into a hefty (3000w?) pure sine wave inverter. Feed the 240v output of that into your car. Then a bit of working out to see how efficient the whole setup is.
Place your bet for the Switch Frequency: 250 kHz, 500 kHz, 1 MHz, 2 MHz, more…?
I am guessing that the large tall inductor is part of the PFC circuit, and that is why the caps in parallel are 450V the mains is rectified with a small cap usually approx 1uF then a boost circuit gives around 400V to the large 450V caps, the the switch mode PSU runs from this elevated voltage. The relay is part of the inrush circuit.
The devices under the heatsink I am guessing are Mosfets as part of a synchronous rectifier.
If the short-circuit protection isn't onerous, you might have a nice spot welder there too. 😁
The metal strips in the output transformer are the secondary coil and the heatsink is for the rectifying diode which is hidden under it. I have seen a similar transformer in a psu for Motorola BTS but it outputs 27v.
That big inductor looks to be the main switching transformer – the high current secondary windings are joined to the plates to get the 200+ amps safely to the equally large rectifiers under that heatsink.
It's not an inductor, it's the transformer! And then there's the rectification diodes (actually there's probably MOSFET for active rectification) under the heatsink near the outputs.
Also the creepage and clearance limits increase as you go higher, for CE most will limit the equipment to 2000m or 3000m i can't remember the correct altitude. but there are not many places above the normal limit.
The large inductor after the mains filter is likely for the active power factor correction. The small taller transformer might be the auxiliary power supply, two of the smaller ones might be gate drive transformers one for each half bridge. The third one with the black strap on it might be for primary current measurement. The small flat bar inductor is likely to be in series to the output transformer. A possible controller might be a UCC2895 phase shift PWM controller.
We use some 1500 W 5 volt power supplies for electronics at work. So 300 amps continuous out of a unit about half the height of this one. Just two huge thumb-sized slabs as the output connectors and a deep sense of wonder from the user as to how the heck do they manage so much current handling in such a small box and very stable voltage and no noise either.
Made in Japan and very clean units, impressive.
Oh I get it, it’s a PSU for a mining rig. Couldn’t work out what it was for until you waved the power leads around at the end.