Build Log: Servo Drive and VFD with vector control

[Jonathan]

I think that separate controller board and inverter with power supply is the only way to go. I recetly began looking into PMSM control and the differences in motors are too big to use one MCU/power stage combo. On eBay there is plentiful of used servomotors from industrial machines (probably from modernization/retrofit), which are quite cheap and for us hobbyist still good enough.

I tend to agree. Since we're not too concerned about efficiency you can get some way by over-rating the components, which doesn't increase the cost too much, but you soon become limited by the switching frequency (and thus control bandwidth) that can be used.

On eBay there is plentiful of used servomotors from industrial machines (probably from modernization/retrofit), which are quite cheap and for us hobbyist still good enough.

I've been vaguely looking out for one to try, as my driver may not be working well with position control just due to the non idealistic properties of the motor I've been testing with.

Really trying to keep the ball rolling with this project, but my PhD work and related things keep getting in the way as I tend to be spending 9am~8pm in the lab. Still, I have however done some more soldering on a few of the PCBs. Here are a few pictures:



Can anyone spot the mistake in this one...



Time to stop now though as it's 1:30am and I don't want to miss the eclipse this morning...