Jack
I successfully converted an older APC computer UPS to 400 cycles, see
ER 282, November 2012.
I would think that any power supply that directly rectifies the AC
line or charges a battery like the above APC power supply is a
candidate. There are several articles on the web that show various
solutions.
eBay item # 223984571313, SG3525 LM358 Inverter Driver Board Preamp
Drive Board 12-24V, has all of the electronics, excluding the power
transformer, rectifier and filter. The schematic for this module is
available on the web, just takes a little searching. Since it uses
the SG3525, a resistor or capacitor or both will change the switching
frequency to any frequency desired. You can use either a center
tapped power transformer or one without a center tap. Did I mention
that this module goes for $3.02?
Jim
Logic: Method used to arrive at the wrong conclusion, with
confidence. Murphy
-----Original Message-----
Sent: Fri, Jul 22, 2022 3:42 pm
Subject: [Milsurplus] power supply question
Regarding switching type computer and modular power supplies.
Will they work on 400 Hz , or even possibly 800 Hz power?
Off hand, you'd think so. as generally they rectify the AC line to make
DC, but is there something that ties them to strictly 60 Hz?
Thought I'd ask before I blow something up.
Thanks
Jack Antonio
WA7DIA
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