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The is a rotary phase converter question
mc:
Paralleling two RPCs could be done. Ensure phases are matched, run both up to speed, then connect them together.
The input frequency takes care of ensuring speeds match, you'd just need to ensure the correct phases are matched.
If you're unsure, I'd wire in some relatively low value fuses (5A would probably be good enough for testing) the first time you try connecting both, as I'd rather blow some small fuses if phases are mismatched, than rely on the main breaker.
awemawson:
You will get large circulating currents between the RPCs as the voltages when open circuit will never be the same.
mc:
There will be, but on two identical RPCs they shouldn't be that different. Once you get over the initial connection, in reality there should be no difference between two RPCs running in parallel, and adding in an extra motor and capacitors.
Alphawolf45:
I got the idea for two rotary phase converters from the suggestion of a major rotary phase converter manufacturers website..
I wouldn't like using a 40hp rotary phase converter every time I wanted to use the edm . The diesel or propane generator idea has real merit for running the injection molding machine.. I've seen decent old biguns for 3 or 4 thousand dollars.. 'Believe I'll start looking for one in another month after I have tests at the oncologist saying my cancer is indeed in remission. I have real 3 phase on a pole in my yard but would be a problem getting it into my shop because of big trees that would need to be taken down. And too, the cancer I had usually returns in 5 to 8 years so I don't need to be initiating another electric bill with cost of poles and transformers added in every month for who knows how long.
seadog:
--- Quote from: mc on February 15, 2019, 04:59:47 AM ---There will be, but on two identical RPCs they shouldn't be that different. Once you get over the initial connection, in reality there should be no difference between two RPCs running in parallel, and adding in an extra motor and capacitors.
--- End quote ---
The problem is synchronising the two outputs. Unless they peak and trough at the same time they cancel out.
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