[Neo_123]

According to this Estimating Stepper Motor Size
2.5mH means max V 50V, if I'm using 80V power supply and 40V-80V stepper driver, will the stepper destroyed?
Will the driver have ability to limit its voltage supply to 50V according to the stepper?

Thanks

[ger21]

The actual rating on the motor is probably 2V-3V. Higher voltage is used to "force" more current through the drives at higher speeds.

That formula is not a strict rule, but something that Gecko came up with.

Higher voltage can result in the motor running hotter, but it depends on the drives. Better, high end drives can handle higher voltages and run motors much cooler.
If it's a smaller Nema 23 motor, I'd probably run it at 60V70V.

If you run cheap 80V drives at 80V, they may not last long, as they don't have a lot of headroom.

[Neo_123]

I see. I'm searching for a good chinese driver, however, I think even best chinese driver is nothing compared to gecko. So I guess I shouldn't run them at their limit.


> That formula is not a strict rule, but something that Gecko came up with.
This means that I can supply much higher voltage than this calculation as long as my driver can handle it, right?
(the current on driver is limited similar to stepper rated current)

[ger21]

I would not go over 72V, and make sure the drive has current reduction, or the motors may run very hot.

[Neo_123]

I would not go over 72V, and make sure the drive has current reduction, or the motors may run very hot.

do you mean current reduction when it's idle? The only current reduction I saw was 50% current when idle, I can't find better than that.

[ger21]

Yes.