Comments on: Finding power limits, part 2

By: Tero

Tero — Tue, 23 Jul 2013 12:50:54 +0000

The latest info is there:
http://granitedevices.com/wiki/Argon_specifications

On 230VAC the typical DC bus voltage is between 300-325 VDC (varies during load) and modulation depth of 88% means that effectively 88% of that voltage can be output to motor phases. So 300V*.88 gives 264V max voltage swing on phase outputs.

By: Jason

Jason — Sun, 05 May 2013 23:08:17 +0000

Hi Tero, can you let us know what the peak phase to phase voltage output will be on 230vac supply for Argon, and a guess on continuous and peak amp ratings?

Many thanks,

Jason

By: PowerQuestion

PowerQuestion — Mon, 22 Apr 2013 12:11:19 +0000

It is a “normal” 1986 CNC lathe.
The biggest power motor is for tool change, the Z axis is the 4Kw and the X axis is the 1.8Kw.
I will probably wait for your drive as I was successful with previous granite devices drives.

By: Tero

Tero — Mon, 22 Apr 2013 10:22:36 +0000

“At least” is the current knowledge of the power capability of single Argon drive. So we have chance to run tests with higher load, the power rating may still increase.

4 kW is definitely more than drive can output continuously. That kind of power can be achieved in short peak durations however.

What sort of application do you have for these motors? Typical positioning applications consume quite little power so calculating on peak power is often sufficient.

By: PowerQuestion

PowerQuestion — Sat, 20 Apr 2013 11:36:41 +0000

Hello. This is rather a question, but probably is a valid question for many followers of this blog.
I am waiting for the release of this drivers to power a machine that we are reconstructing. This machine have 3 servos:

4.3Kw cont 133V 18.7A
4.0Kw cont 157V 14.7A
1.8Kw cont 133V 8A

I saw that the new drives would be able to output power of at least 1.5Kw…. So unsuitable for the requirements? (the “at least” confuses me). Thank you