[AMPS] 3-phase fan motor - reference...

[Skip S Isaham]

There are a line of paper back books from Lindsey Publications here in
the US that advertise a lot of inventer type reprints. Two such reprints
I've seen at a friends house were on the subjects of auto alternator
testing/mod/repairs and another on special methods to run various motors
on different voltage and phase combinations. Well worth the price tag.
Most of the Lindsey publications are reprints from older articles/books
which have great information.  I see them advertise in a lot of the
typical electronics type mags...

cheers
skip   wv6f
.

On Sat, 29 Aug 1998 08:57:26 +0100 Chris W Tran <chris.tran@zetnet.co.uk>
writes:
>
>Saturday 29th August 1998
>
>Thanks to everyone who responded to my posting about how to
>run a 3-phase electric motor with only 2 phases available.
>
>5 people told me 'you don't have 2 phases' which surprised
>me - Peter G3RZP gave the clear explanation as to why I do have
>2 phases here - out in the country near Invergordon, Scotland.
>The second phase (240v to neutral, 415v between phases)
>was installed to feed underfloor heating, which was disconnected
>long ago.
>
>I'll try Dick W0EX's suggestion about the 2 caps (start/run)
>(which he posted to the reflector) - I think the large paper caps.
>I have should work.  (Dick gives an idea of values needed)
>Another possibility I guess is to 'lag' the current in the 3rd
>motor winding using an inductor (e.g. a transformer winding) - the 
>advantage of this is that it would be easier to get rid of the heat 
>generated, probably.
>Some formulae on how to work out the value of inductor or
>capacitor would be a help, but running a 3-phase motor off 2 phases
>is not exactly a common problem !
>
>BTW - everything in this shack is fan-cooled - the radio, the amp,
>the amp PSU, the footswitch, the operator !
>
>73  Thanks
>
>Chris GM3WOJ/GM8V
>
>check:   www.odl.co.uk/gm7v
>
>
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>
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