Hi Tommy,
Yes, thank you for that, I realised I was missing some wattage somewhere 
Just got back from NZ, but sick as a dog, so will make the changes when I feel somewhat better. Terrible man- flu…
Again, thank you, appreciate the correction.
Cheers,
Beano
Ha, I think @Mika is more like the professor since he is doing his PhD at the Tampere University of Technology.
Oh, I hope you get well soon! I also had a flu during this weak and it wasn’t fun.
That would explain why the NDR Power supply can’t handle the Large Mige at 25A (it’s close but it Faults with low voltage at times) even though the initial calculations put it within range to be able to.
The large mige at IONI Pro HC max current consumes ~517W of power in stall situation, power requirement increases if the shaft outputs power. If we would consider some extreme case, like 2 rev/s and in the same time output the peak torque, then the power consumption could reach 860W. The previous is more like theoretical, not like actual situation. Real life is more like about 680W-690W range (or less) for the peak power consumption with that motor (1 rev/s @ 27Nm).
That is why I only do builds with the SDR 480-48 or PSP-600-48
It is not that much more expensive, and why stock multiple power supplies?
Just my opinion of course.
File updated with a new version in the first post, now including corrections based on Tommi’s comments. There also is a Dropbox link to download the pdf.
Thanx for that, Tommi, should be a bit more accurate now, certainly good enough for our consumption.
Cheers,
Beano
Can someone take a look in the link above to see in the configurator product if some of the servo motors can be used for OSW… Big thanks
edit: 25 June 2018: Added a significant amount of additional servos, especially the smaller series MiGe units, for those that might want to use a smaller-footprint and lower torque servo. 8x MiGe and 3x Kollmorgen servos added. See the highlights in blue. Use this Rev6 file now, please.
@phillip.vanrensburg Do you think you can share the link to the spreadsheet you are using? It would be helpful to actually learn how the values are calculated and calculate them for other servos… Thanks! 
^^That’s correct, not a mistake 
Error 404 on the link on OP.
Of course Dropbox kills the link after a period of time…
Does anyone have a mirror of the PDF Beano posted?
Hello, is it possible to get the spreadsheet so I can add my own motor to see estimation for needed PSU wattage? I tried to use formula from wiki but the result does not seem right to me. I’m trying to calculate PSU for Lenze MCS 12D20L which is in datasheet pretty much next to 12H15L which is already included in the table.
Here is screen from datasheet:
Peak Current squared * phase to phase resistance * 1,5 = 1034W for this motor and this does not include the shaft output power.
I wouldn’t say that this is very good motor for this purpose. If you’re willing to pay this amount of money for a motor, I would recommend to purchase Simucube 2 Ultimate or Simucube 2 Pro. You will get better performance either way.
Thank You. I managed to get this motor for about 100 EUR almost unused. So I would say that it is not a bad deal. I will probably end up using something around 750 W PSU. I know there will be some performance left on the table but as the motor was almost the cheapest thing on my setup I’m willing to upgrade it later if I found it lacking.
PS: Before I picked up the motor I calcualted based on formula from wiki (https://granitedevices.com/wiki/List_of_motors_for_SimuCUBE):
Max_torque_output = torque_constant * (32.2 / winding_resistance) [Nm]. The 32.2 is the maximum phase-to-phase RMS voltage with a 48 V PSU.
PSU_requirement = (max_torque_output/torque_constant)^2 * winding_resistance * 1.5 / 0.93 [W]. Replace the max_torque_output with the motor peak torque, if the latter is smaller.
Max torque = 1,16*(32,2/2,2) = 16,98 Nm
PSU_requirement = (16,98/1,16)^2 * 2,2 * 1,5/0,93 = 760 W
I have some electrical knowledge but not in terms of motors so I’m now confused about why there is not just this simple formula on the wiki?
The same formula is there in wiki and you used the same formula, except that I happened to use it wrongly as I did not check properly the peak current the drive can drive through the motor, therefore my result was too high.
Same formula, but with the actual peak rms current check.
