Hi,
I've just buldt three regular UHU controller and I use two of them for 24V motors and i want to use the third one for a 140V motor rated 1 A.
When i turn op the voltage to about 70V the snubber resistor on the output gives of quite a lot of smoke. With snubbere resistor i mean the 1k8 2W in series with a 100nf cap across the motor output terminals.
Can i remove this? what happens if i increas the resistor to 4k 4W?


I must say these controller are ingenious!! they are working great and it was actually quite easy to set the parameters. I was unable to get the system to oscillate so what i did was to use the go command and set the parameters so the overshoot became as small as possible. Is this the right way to do it?

best regards
chris