40 Amp 250 volt Viper coming soon

[Al_The_Man]

These motor are/were typically used with large 3 phase SCR drives, you can roughly calculate the very high initial current, that can occur if steps are not taken to accelerate this very slowly on a lower current-capable drive.
If the armature has not had the opportunity to develop back EMF and if the armature resistance is typically around .15 ohms and your drive happens to reach a full 120vdc output, then the Potential motor current could initially be ~ 800amps.
Hopefully this is a PM motor and not a wound field?
Al.

[vrasak]

Hi All,

I want to try Viper250 with Super Line SDN-MFZ-VF spindle, I will install a 1000 line encoder for it.

Any chance of success?

Wee K.

[Larken]

What voltage will the power supply be ?

That motor has a field winding. You would have to get a separate circuit for that.

LK

[vrasak]

Voltage for rotor is 210 VDC and need some margin for handling regenerative energy during deceleration.

I will provide field winding power separately, probably through adjustable current regulator.

Wee K.

[Larken]

Due to interest in large drives lately, I will be making the Viper 400. It will be a a full 350 volts and 40 amps. I'm using a DSPIC on a daugter board above the main power board.
This drive will also be available as a AC 3phase servo eventually as well. It will be priced under $300.

Hopefully i will have it available by early 2012

Larry

[slimneill]

Any update on the Viper 400?