[MRCG] Variable Frequency Motor Drive for 400Hz/800Hz Radio Power?

[robinson at tuberadio.com]

Hi Mark,

No experience with that
but
when you get around to the filtering part of the project
there is a good filter design in the old SCR HANDBOOK
that can handle high current.

Regards
Ray

> Do any of y'all have any experience with trying to adapt a variable
> frequency motor drive (VFD) for off-label uses such as producing 400Hz or
> 800Hz power for running aircraft radios? I gather that at the very least,
> a lot of output filtering would be needed to get clean sine waves from
> their unfiltered PWM output, and then even more input and output filtering
> to get rid of EMI hash. Most of the cheap imported VFDs I've seen so far
> appear to go up to 400 Hz, and some of them support up to 1000 Hz.
>
> The applications I'm thinking of include powering my GP-11 transmitter
> (around 1kW of 115VAC 800 Hz single phase), and powering the 618T-2 that I
> picked up at the last MRCG (around 1kW of 115VAC 400 Hz 3-phase). I have
> an 800 Hz aircraft generator and spline to V belt adapter as a backup plan
> for the GP-11, but something smaller and more efficient and quieter than a
> cobbled-together motor generator set would be nice.
>
> --
> Mark J. Blair, NF6X <nf6x at nf6x.net>
> http://www.nf6x.net/
>
> ______________________________________________________________
> MRCG mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrcg
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCG at mailman.qth.net
>
> Website: http://www.mrcgwest.org
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>