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Using RPC to power equipment with electronics

Don Gitzel

Aluminum
Joined
Jul 25, 2017
Can one power a banding machine consisting of 6 motors, a heating load and electronic controls, with a home assembled rotary converter. I would think that the electronics would be single phase and be connected to the pass through legs. Any info helping me get my head around this scenario appreciated.
 
Your idea of what to do with the electronics is correct.

The issue can come up with a CNC where the 3 phase is rectified to produce DC for servo power. Then, one weaker phase will lead to more ripple voltage on the motor DC, and potential issues.
 
I have done exactly this, never wire electronics to the wild leg

Large inductive loads can drop voltage and cause electronics to drop out. I had two CNC knee mills running on one rotary and with short cycle times, every once in a while, both guys would fire both spindles at the same time. Both machines would EMO/ drop out.

split them onto two different converters, fixed it
 
This info on the banding machine. There may be single phase loads on each leg.
file:///var/mobile/Library/SMS/Attachments/41/01/331E138D-7BD1-48A2-8981-D0FFDB69BF8A/k203_elec.pdf
 
Is there such a thing as a 230 to 230 volt isolation transformer that would solve the wild leg problem associated with a RPC?
 








 
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