DC Power Supply

[Muzzer]

Full wave rectification of 110Vac will tend to result in ~140Vdc, possibly even higher if (like me) you actually have a 250Vac supply. For my servo drives, I dismantled the secondary winding and removed enough turns to lower the output voltage when rectified to something like 130Vdc. If you do any fast deceleration, you may see an overvoltage trip if you are running close to the overvoltage threshold in the servo drives.

If you fancy removing secondary turns, there are versions of the site transformers that come in steel housings, rather than moulded yellow fibreglass with black potting inside. They are much simpler to dismantle and modify.

[Chaz]

Full wave rectification of 110Vac will tend to result in ~140Vdc, possibly even higher if (like me) you actually have a 250Vac supply. For my servo drives, I dismantled the secondary winding and removed enough turns to lower the output voltage when rectified to something like 130Vdc. If you do any fast deceleration, you may see an overvoltage trip if you are running close to the overvoltage threshold in the servo drives.

If you fancy removing secondary turns, there are versions of the site transformers that come in steel housings, rather than moulded yellow fibreglass with black potting inside. They are much simpler to dismantle and modify.

Thanks. I've ditched / removed the old stuff, struggled so done a retrofit which is nearing completion.