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

[Scott Johnson]

Mark-
Not necessarily true on all VFDs.  I have successfully set up TECO and
Automation Direct VFDs to run as inverters by fixing parameters voltage and
frequency in the setup., and I have run bot ARC-58s and 618Ts from these
VFDs.  The big caveat is that you will need to run either a delta to wye
transformer or wye autotransformer to derive the neutral.

Scott V. Johnson W7SVJ
5111 E. Sharon Dr.
Scottsdale, AZ 85254-3636
H (602) 953-5779
C (480) 550-2358
scottjohnson1 at cox.net
scott.johnson at ieee.org

-----Original Message-----
From: mrcg-bounces at mailman.qth.net <mrcg-bounces at mailman.qth.net> On Behalf
Of Mark J. Blair
Sent: Wednesday, December 18, 2019 5:24 PM
To: MRCG Mailing List List <mrcg at mailman.qth.net>
Subject: Re: [MRCG] Variable Frequency Motor Drive for 400Hz/800Hz Radio
Power



> On Dec 18, 2019, at 4:14 PM, John P. Caldwell <jcaldwell at rbcos.com> wrote:
> 
> Hi Mark,
> 
> There have been numerous "I wonder if" posts about using a VFD to 
> produce 3 phase 400Hz power and lots of folks that claim I can be 
> done.  It won't work as the a VFDs output is dependent on the load it
sees.

Thanks! That's the kind of information I was looking for, even if it's not
good news. I'll give up on the VFD idea and keep looking for other options.

> BTW, if you're playing with 618T's you may want to consider joining 
> the Collins 618T groups.io group.  Lots of good info there, and we've 
> got a pretty good files section including depot overhaul manuals.

Yes, I'm a member there, and I've also been discussing my ill-advised VFD
idea there.


--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/

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