Probably still a little premature to share, but I'm excited to have been getting some time in on the lathe restoration lately. Project is 1943 10EE that I tore apart almost 15 years ago and am just now getting back to operational. Still lots of paint stripping / repaint in the future (tailstock and all the covers). But, at this point, I don't care what it all looks like. I just want a functioning lathe.
Anyway, part of the restoration is a drive conversion to modern PWM drive of my own design. Developed it years ago for a 3-phase PMAC motor but put the hooks into the design such that it would be able to drive the brushed DC motor in the 10EE when time came. That time is now. Hopefully finish off the power wiring this weekend and can get to work on software and controls.
Input power is 240VAC single phase. Off the shelf 250VDC, 3kW power supply feeds the inverter. 2 legs of the 3-phase drive make up a full h-bridge to drive armature in either direction. 3rd leg feeds the field. When all done, old-school DC motor performance capable of running full-tilt directly off of single phase power
Anyway, part of the restoration is a drive conversion to modern PWM drive of my own design. Developed it years ago for a 3-phase PMAC motor but put the hooks into the design such that it would be able to drive the brushed DC motor in the 10EE when time came. That time is now. Hopefully finish off the power wiring this weekend and can get to work on software and controls.
Input power is 240VAC single phase. Off the shelf 250VDC, 3kW power supply feeds the inverter. 2 legs of the 3-phase drive make up a full h-bridge to drive armature in either direction. 3rd leg feeds the field. When all done, old-school DC motor performance capable of running full-tilt directly off of single phase power
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