Has anyone here had real experience of converting star-wound motors to star/delta?
I'm swapping my CVA lathe to inverter drive. I thought I had the job cracked, I had a spare motor of the same power and nominal frame size as the original, but dual-voltage (and with duff bearings). I sorted out the bearings, swapped the pulley, bolted it to the (bl**dy heavy!) sub-plate, then found it wouldn't go into the space available with any room for adjustment or for wiring it up :-(( The frame is about an inch bigger across the fins, and the terminal box is about another inch bigger, than the original. There might, just about, be room if I reverse the frame so that the terminal box is on the other side, but it's highly doubtful. Plan B is to convert the original motor and put it back. I've had the armature out, & I'm pretty clear that I can identify the star point and break it out. If I do this, any recommendations about type of wire to use, what to use to replace the lacing I'll have to cut away, and is there a 'domestic' substitute for the varnish used to tie it all together? Last time I had one 'done' at the local rewind place they charged me
50 quid (without a bill), the three extra wires were just left as 'tails', though they did to a thorough job of the lacing & varnishing.Cheers Tim
Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service