dual speed 400hp, 480VAC motor
dual speed 400hp, 480VAC motor
(OP)
fellow engr's,
bear with this gearhead...
existing 400hp, 480VAC electric motor driven by VFD (0-1800 rpm).
in the event of vfd failure, is it desired to operate motor at 50% speed (900 rpm). best speed for maintaining controlability with process. this means instead of a 4-pole motor for VFD operation, an 8-pole motor for direct line voltage operation.
is this possible? a single motor with 2-windings or poles.
thanks for educating a gearhead.
-pmover
bear with this gearhead...
existing 400hp, 480VAC electric motor driven by VFD (0-1800 rpm).
in the event of vfd failure, is it desired to operate motor at 50% speed (900 rpm). best speed for maintaining controlability with process. this means instead of a 4-pole motor for VFD operation, an 8-pole motor for direct line voltage operation.
is this possible? a single motor with 2-windings or poles.
thanks for educating a gearhead.
-pmover





RE: dual speed 400hp, 480VAC motor
"Venditori de oleum-vipera non vigere excordis populi"
RE: dual speed 400hp, 480VAC motor
RE: dual speed 400hp, 480VAC motor
thanks for the responses.
yes, various standby drive units are being considered along with fluid drive couplings, magnetic couplings, etc.
there is a balance in meeting process conditions and what is most practical for situation.
a follow-up question, if selecting 2S2W motor, will motor footprint change as well? - depends upon motor mfg? trying to determine if foundation work needs to be accomplished.
thanks!
-pmover