[How do I?] Combining two rotary phase convertors ...

Karl, is there a timer/switch used between the motors? Any chance you could do a quick schematic for the wiring? I could probably figure it out, but like they say "a picture is worth a thousand words". Thanks, Mike

Jim, That was what I was hoping. The 15HP motor was on a compressor, and appears to be pretty robust. I'm thinking the winding's wont be phased (pun intended) by the extra 32V. I was pretty confident you guys would get me pointed in the right direction. Cheers, Mike
 
Search my posts for how to do what you are asking. Yes, it can be done. But, asking for a 5 HP RPC to spin up a 15 HP idler motor might be more load than it can take. You will need to have L1 to L2 and L2 to L3 run capacitors on the 5 HP idler to get it to start for sure. But other than that, read my other posts. I go into pretty good retain about multimotor RPC setups
 
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