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

[Scott Johnson]

Yes, plus it normalizes the three legs and seems to provide a bit of
harmonic suppression, I suppose due to the added inductance.
I used an Aircraft lighting transformer.  I think I have seen them cheap on
Fair Radios website. 

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 6:03 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 4:58 PM, Scott Johnson <scottjohnson1 at cox.net> wrote:
> 
> 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.

Interesting! Do I guess correctly that the VFD doesn't have a neutral output
leg, but the 618T-2 needs one for the single phase 115VAC input for its
servos, and thus the delta to wye transformer is needed?


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

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