Yeah, Jim. It's funny how things get lifted from context only to be shoved
back down as gospel. Thanx for the confirmation.

Bob Swinney
"jim rozen" wrote in message
...
In article , Robert Swinney says...

Having a bit of experience with rotary phase converters, frankly I cannot
say where the "1.5 X" minimum size of idler came from. Perhaps Fitch
threw
it out several years ago when researching the subject, I just don't know.

I may be guilty here - if not of originating, then at least
propogating the factor. Seems like anyone who ever tried to
build a converter with a motor that's 1X never gets it to work,
over the years of observing. They need to go bigger - the 1.5
factor works well if you do the 'capacitor thing.'

I probably first saw the number from Fitch Williams. Likewise
the old saw that the 3600 rpm motors don't make good converters.

Jim


--
==================================================
please reply to:
JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com
==================================================