Investment Opportunity Advice Needed

[Pianoman]

Thanks for the info. Someone suggested this, please tell me if it makes any sense to you.

The power supply sounds like it requires about 4kW at full power. You probably won't be able to draw this from your domestic supply (at least not from a single circuit), so you probably won't be able to run at full power. Maybe you can parallel some circuits on the same phase, or make a high current connection at the fuse box.

To run the power supply at reduced powers, neither static converter or rotary converter are likely to be necessary. If you look inside the power supply, I expect the three phases are connected to a 5-terminal bridge rectifier, which is in turn used to charge a main filter capacitor. It would be purposeless to generate three phases just to recombine them this way.

To run at low powers, you could connect active and neutral (of your single phase system) to any two of the three phase inputs. There are probably also single phase circuits connected across two of the three phase inputs inside the power supply. In that case, naturally those are the two inputs you will have to use.

Please don't attempt any of this unless you know exactly what you're doing.

 

[john_lawson]

i wonder what my wife would say if she came home and i had on of these hooked up in the garage

 

[MarioMaster]

Thanks for the info. Someone suggested this, please tell me if it makes any sense to you.

The power supply sounds like it requires about 4kW at full power. You probably won't be able to draw this from your domestic supply (at least not from a single circuit), so you probably won't be able to run at full power. Maybe you can parallel some circuits on the same phase, or make a high current connection at the fuse box.

To run the power supply at reduced powers, neither static converter or rotary converter are likely to be necessary. If you look inside the power supply, I expect the three phases are connected to a 5-terminal bridge rectifier, which is in turn used to charge a main filter capacitor. It would be purposeless to generate three phases just to recombine them this way.

To run at low powers, you could connect active and neutral (of your single phase system) to any two of the three phase inputs. There are probably also single phase circuits connected across two of the three phase inputs inside the power supply. In that case, naturally those are the two inputs you will have to use.

Please don't attempt any of this unless you know exactly what you're doing.

Yes it makes sense, but the unit may require the AC waveform for other functions, and even if not, you would not want to do what he suggested as you would be putting a large strain on one or two of the rectifying sets, and leaving the rest to do nothing.

Also, single and split phase AC have a lower active duty cycle versus 3phase (much more constant power) and the unit may have stability problems running on single or split phase.



At this point I'd recommend getting either a rotary phase converter or just taking it somewhere where they'd let you borrow some 3 phase juice for a bit.

 

[Pianoman]

Hey I'm going to SELEM so hopefully someone can help me out there. I'm praying and hoping it's possible to convert it to run on single phase somehow. I can't afford a 1,000 dollar rotary phase converter right now, and it's very heavy and very difficult to move around. So borrowing a friends 3 phase is much less than convenient.