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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