I'd like this to be reasonably low effort. My biggest concern is single
phase input. Control/response requirements are about as low as it gets.
I'm looking to output about 1000lbf in a linear direction via a
crank/slider or ballscrew with peak speed of about 1m/s. So that's a real
5hp of energy. Duty cycle will be low, and external active cooling can be
provided if required. So things like steppers are out, I've never seen a
stepper that outputs nearly that much, and I don't particular want to
create a 4kw 80v dc power supply...
re: Control requirements, I really only need to start running at a
particular speed and be able to return the system to a somewhat close stop
position, which can be as simple/bad as a vfd with a switch and timed jog.
Any extra control over the system that I can get would add capabilities
though.
The goal here is to see if there are any industrial drives out there that
might periodically pop up on ebay which are higher KW and single phase
capable.I see units like the Parker Gemini GV/GV6-U12/H20 which claim
single phase at 3.5kw and 5.9kw.
Dave
On Wed, 11 Apr 2018 09:24:32 -0400, Dave Cole <linuxcncro...@gmail.com>
wrote:
How much time/work do you want to put into this motor/drive setup?
There are no really cheap large servo motor solutions unless you stumble
into a deal on Ebay or a surplus marketplace.
Larger servos generally mean 3 phase inputs. So that becomes an
immediate issue.
If you can live with a VFD, your life will be much simpler to simply get
a single phase input VFD and a suitable motor.
You can find 3 phase gearbox equipped motors on Ebay that can get you
500 rpm max.
Dave
On 4/11/2018 2:01 AM, David Berndt wrote:
Wondering if anyone had any preference/experience/advise to share with
single phase capable larger servos. I'm looking at an application for a
3 to 5hp motor with a vfd, but if I could just get a servo to fill in
that'd be nice. Gear reduction will be required, but something with
more torque, needing less reduction will make things easier.Say ~500rpm
as a goal maximum output.
I see things like Fanuc red cap servos (ai series? pulsecoder encoder)
2.5kw kicking around ebay. Driving something like that would seem to be
the challenge?
Thoughts? Suggestions? Previous experience?
Dave
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