[Milsurplus] 400 Hz Power

[Peter Gottlieb]

Quite a number of VFDs for motors can go to 400 Hz and are 3 phase.  
There are some that will work on single phase input right off the shelf, 
however, most of the larger ones are configured for 3 phase input and so 
if all you have is single phase you will need to do some mods to the 
front end rectifier circuit.  I've used these things successfully to run 
400 Hz equipment and the modern ones are PWM and put out a decent 
looking sine wave.  You'll want one with a keypad for setting parameters 
or you're going to be searching out software to connect and program the 
thing, which you should try to avoid.  They can be set to power up to a 
certain state, such as 400 Hz output.  Each horsepower of rating will 
put out 746 watts, so for example a 4 HP drive is good for about 3 kW.  
Select a 120/208 output unit.  This is the most efficient way to get 400 
Hz in your lab.

Peter


On 1/16/2011 3:04 PM, Richard C. Grosser wrote:
> There seems to be a lot of people interested in a source of 400hz 3 phase
> power. I have an old rotary inverter from a PBY, however it is very heavy
> and very noisy. I have designed and built a relatively simple static
> inverter that supplies 110 vac 400hz 3 phase as well as 24 vac 400hz single
> phase. It is quite small ( 10" x 10" x 4") and weighs less than 10 lbs. I
> built the digital circuit on a wire wrap board. If someone has the time or
> interest in designing a circuit board, I can make the Cadence OrCad files
> available to them. In the mean time, the circuit is available for download
> at www.richardgrosser.net/inverter.pdf.
>
> If you have any questions, email me at Richard at richardgrosser.net
>
>
>
>
>
> Enjoy!
>
>
>
> Richard C. Grosser
>
> Palm Springs Air Museum
>
> 745 N. Gene Autry Trail
>
> Palm Springs, CA 92260
>
> (760) 778-6262 X231
>
> Cell: (760)-898-6888
>
>
>
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