Re: [CAD_CAM_EDM_DRO] Re: Need help with servo power supply design

turbulatordude wrote:

>OK, so, I buy a 1.5hp treadmill motor 110 volts. (1.7*746= 1,116
>watts or 10 amps)
>
>I gear it down for my plasma table, 2:1.
>assuming the power supply will be 66 volts, that is 60% of nameplate,
>so would I set the current for 10 amps for the motor maximum ? 6 amps
>for the max speed calculation ? or something in line with the power
>the table needs ?
>
>

The current limit is on the output current to the motor, so you'd leave that
at 10 A (unless you want to use the peak rating of the motor, which is
presumably higher). You could set the current limit to whatever the highest
acceleration you ever expect will need to achieve that acceleration.
Or, you
can set it for whatever the motor can handle. High end servo drives have a
thermal limit system that integrates heat over some time interval, and
either
brings down the current limit when the motor is hot, or declares a fault
if the
high dissipation continues. But the lower-cost drives don't have this
feature.

Jon