On 4/24/23 17:41, Thaddeus Waldner wrote:
HI,
I have an application where I need a NEMA 23-size 80-120 watt brushless DC
motor. The machine housing doesn’t have space for a 100w DC 24v power supply,
so I would like to use a controller and motor that runs at line voltage.
Does anyone know of a small BLDC/PMAC/Synchronous AC motor that is designed to
run at about 150v coil voltage?
Motors this size/voltage are apparently quite common in kitchen appliances that
use pumps or fans, but I cannot seem to find a plain motor with output shaft.
How much length have you got? A 1 newton meter 2 or 3 phase
stepper/servo is about 80mm behind the flange, and 3 newton meter is
about 125mm behind the flange, both have 8mm shafts, and run on cl57
sized drivers for the 2 phase versions, can turn more than 2k revs
continuously but hot, stopped virtually zero power and heat unless they
are holding up a 300kg knee on a mill. They get to where linuxcnc tells
them to go or shuts linuxcnc down in its tracks, the closest I've ever
seen to a motor that Just Works. I'm using two of them on my Sheldon
11x54 lathe, shutdown wired up, tested, has never happened while making
swarf. If suitably microstepped, /16 seems to be popular, accuracy is
cosiderably less than a micron. Whats not to like?
I also have 2 of them on a 6040 gantry mill, a one nm on the z cuz the
std motor can only slowly lift the heavier spindle motor, and a 3nm
driving a 5/1 worm which drives the B axis chuck to carve the hard maple
vise screws I am making.
They are servo's, priced at stepper prices. If they lose home for any
reason, lcnc is stopped before the work is wrecked. Can your much more
costly servo's do that?
The tech we use marches on. Take care and stay well Thaddeous.
Thanks,
Thaddeus Waldner
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