Need help finding one of these please.

[737NUT]

I need a 26Vac or 115Vac 400Hx power supply or an Inverter that will take 28Vdc and turn it into 115Vac 400Hz.

I have looked on Google for 2 nights straight without success. I found several but they were all 1000.00++

I am on a tight budget like most builders.

On my 737 sim i used to have 3 inverters, i gave one away, one went with the sim, and one was not working.

I paid 30.00 each for those. Now i can't find one to save my life.

Thanks,
Rob

[Michael Carter]

$1K is about the going rate for a static inverter. You might find one a couple hundred cheaper at a surplus outlet.

If you're going to play with 400 cycle powered equipment it's going to cost. There's no way around it.

[Bob Reed]

Mike needs to finish his new book. I think he tells you how to build one!

[AndyT]

What brand was the one you gave away?
Its not your specs but check this one.

http://www.allelectronics.com/cgi-bi...O_120VAC_.html

[Michael Carter]

That's not the type he's after.

I doubt that even puts out the entire sine wave. Most of them are a modified square wave or clipped sine wave.

Bad for some electronics and unusable for 400 Hz requirements.

Here are a couple under 1K:

Scoll 3rd of the way down:
KGS Electronic TSO'D 30 VA Static Inverter PN SC3 & SCA3

Half-way down:
KGS Electronic TSO'D VA Static Inverter PN SPC -5


http://www.avionix.com/store/kgs.html

Another here, unused since overhaul, no price listed. Scoll half-way down:

http://www.warbirdrelics.com/Electrical.htm

[737NUT]

Thanks Michael, i e-mailed them asking for a price.

I also found this one but look at the input requierments!! I hope that is a typo!
http://www.fairradio.com/catalog.php...item&item=3041

The one's i had before were from a helicopter and were fairly small.

[Michael Carter]

That would power the entire simulator if you could meet the input requirements!

That might be an inverter for the battery buss. The battery is the only place I can think of to get that voltage and current.

[Mike.Powell]

28VDC at 110 Amps on the input is about right for 2.5KW output. That would put the efficiency at 81%. If you're only pulling, say, 250 watts, you should see something on the order of 11 amps on the input. Maybe a bit more, it doesn't scale exactly linearly.

[737NUT]

It just so happens that my new job has just what i need to drive this. All the cell phone tower equipment has a battery back-up that is 28Vdc and will handle up to 500amps!

Mike,
What do you think a 727 full of gauges will pull in total power? Think this would be enough, 2.5Kw?
Thanks guys,
Rob

[Michael Carter]

That would be more than enough.

It's been 20 years since I worked with 3 phase 400 cycle power. Check to see that you're still getting that much wattage on a single leg of the three phase. You won't need all three legs for the instruments. They're all single phase instruments.

Check out these batteries here: http://www.siloworld.com/576thSMS/Pr.../LF-8/lf-8.htm

Scroll down to the 15th picture. Those batteries are 36V and weight 1500 Lbs each. I worked in LF's all over west-central Missouri. Takes all day to change one.