5 hp 3 phase motor to a 3/4 hp single phase..?
On Thu, 18 Mar 2004 07:51:58 -0500, Brian Lawson
wrote:
On Thu, 18 Mar 2004 06:55:28 -0500, Peter T. Keillor III
wrote:
On Tue, 16 Mar 2004 15:57:06 -0800, "Paul"
wrote:
SNIP
I like vfd's, but wouldn't argue with the guys building converters
from low cost or free motors. But for that price, I would have gone
for a vfd.
Pete Keillor
Hey peter,
I thought there was at least some controversy about being able to do
"instant" reversals with a VFD attached. Any comments from anybody?
This comment/question from somebody who hopes to be starting a 25HP as
a rotary convertor some day pretty soon.
Take care.
Brian Lawson,
Bothwell, Ontario.
Brian, I don't know about instant, but you can do 'em pretty quick.
It depends on how you program the accel and decel times. I don't need
fast, so I set mine for 10 seconds. When I flip from forward to
reverse, the motor decelerates to a stop, then instantly changes
direction and accelerates in reverse.
Update: I just went in the shop and programmed 1 sec. accel - decel
times. It changes direction damn quick.
Pete Keillor
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