New update on STMBL

More useful than ethercat is 600vdc because opens the door
to more powerful from 2kw range servos like spindle servos and big cnc servos.
Except other igbt module to handle 600vdc better isolation better connectors
what other needs?
The modifications will be in power stage.. driving stage needs modification?
To all stmbl owners are you happy from stmbl ? Works like commercial servos?

andypugh wrote:

I feel that making this as an EtherCAT slave might open something of a licensing can of worms. But it already has Ethernet port for command input, and I would expect the STM32 to have the CPU horesepower to handle the protocol.
 

I don't think this will be a problem because the ethercat license is paid for in the price of the lan9252 chip.
If you were to manufacture these for commercial sale, you would need to be a company and register for free membership of the ETG to be compliant.
Its only linuxcnc who has a lcensing issue because we do not have any legal business structure.

Answering the cost concerns, the prices andy shared unfortunately are not realistic now. Up to now I spend 190-200€ for each board.
I can drive 3.5-4.0W servo (the ABB arm are 4.5W) with the v5, the main problem I'm facing is the need for a proper rectifier with a decent power factor, we are working in developing one with pfc, brake resistor and maybe also bidirectional.
Going 600vdc open to 3phase rectifier and I think less capable of handling high currents for lower voltage motors. Then we should keep two different versions of the board.
Btw I think is not much difficult to make it 600v compliant, more clearance, the isolator (SI8621) should be fine, change the cap, recalculate the resistor voltage div, change the connectors...
Who knows if is possible to use these boards in a industry plant? Is possible to certify a machine using these boards? (CE for example here in Europe)

What igbt module for 600vdc?
For 600vdc there are plenty cheap rectifiers..
400vac is 564vdc rectified.

Here you can see some from ST: www.st.com/en/power-modules-and-ipm/stpo...lligent-modules.html . The v5 is the middle category in terms of servo motor power.
Look in the HP category.
To which rectifiers are you referring? Ready to use boards or simple diode module? I know there are several architectures for rectifiers.

for higher power 600V, something like
Onsemi NFVA25012NP2T might make sense