Jim, more concerned with a dead squirrel, sez:

"Um, maybe in some non-intuitive theoretical treatment - but from a
topological sense the motor windings *are* in a parallel circuit, at least
for delta wired motors. Granted the incoming line is across two of the
paralleled windings of course."

Nope! Draw out a capacitor-assisted rotary phase converter...not just 2
ordinary three-phase motors in parallel. Granted, two phases are across the
line, and as such are in parallel. For the other "phase" assume a direction
of current flow from the 1st motor's "Y"center point through the end of the
3rd leg. Then look at that same point on the other motor and 'viola', the
difference will strike you -- dead squirrel between-the-eyes fashion!

Jim, you are right that two 3-phase motors are in parallel such as in your
own non-balanced RPC. But when you connect them as a capacitor-assisted
RPC, the convoluted 3rd leg current is forced to emulate an ordinary
parallel connection. This is more obvious if you consider that each set of
windings in a 3-phase motor acts as both consumer and generator. The
generator aspect is augmented by capacitor action to creat an aggregate
current that does, in fact, flow in the same direction as if the motors were
truly in parallel.

Bob Swinney



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

load motor are in parallel. BAM! Don hit me right between the eyes with
"dead squirrel" reasoning which proved they were *not* in parallel.


Where's the dead squirrel?

Jim


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