Re: Phase converter for a machine with several load changes: rotary or digital?
Looks like a 20HP RCP would do just fine. Each motor you switch on in the system adds to the overall capacity, so if the drive motor is running and the compressor comes on, you get the benefit of both the drive motor and the RPC to start the compressor.
Here is a 20 HP. I installed one of these for a customer a year or so ago, and it's working fine. Runs two CNC machines. https://www.ebay.com/itm/20hp-3-Phas...Sqw:rk:14:pf:0
Jim Dawson
Sandy, Oregon, USA