Rotary Phase Converter (Create 3-phase power from a single phase source)

[lintelle]

I am curious to know if the plans are scalable. I have a 5' x 10' CNC router table that needs around 30A of 208VAC three phase and the accompanying vacuum pump is another 10HP....

[G.Paul]

This will be a hand drawing. I have to redo it. Give me time its coming. Bean real busy latly

[nhengineer]

I am curious to know if the plans are scalable. I have a 5' x 10' CNC router table that needs around 30A of 208VAC three phase and the accompanying vacuum pump is another 10HP....

The short answer is 'yes' Lintelle. The pony motor doesn't care and the idler (3-phaes generator [kind of]) must be 1.33 times the total final load. The idler's associated fusing must be no more than 1.25 times the total load. The wiring must be capable of the total running under load ampere requirement. If you'll post the total HP and application 3-phase voltage (208 I guess), I'll research what you'll need but you will need to have a local, licensed electrician give my numbers his blessing.

[smithdoor]

Are you working with 208 or is the machine tool 208
If you have in shop 208 that is three phase at you door step

Dave

I am curious to know if the plans are scalable. I have a 5' x 10' CNC router table that needs around 30A of 208VAC three phase and the accompanying vacuum pump is another 10HP....

[nhengineer]

Are you working with 208 or is the machine tool 208
If you have in shop 208 that is three phase at you door step

Dave

Just wondering what bearing your post, Dave, has to do with Mr. Lintelle's inquiry about horsepower.

[smithdoor]

The question is (If you have three why would you need converter?)
To me it simple just change a meter ring to 4 pole and skip the converter Their may be some else that I do not know at this time

Dave

Just wondering what bearing your post, Dave, has to do with Mr. Lintelle's inquiry about horsepower.

[nhengineer]

"I am curious to know if the plans are scalable. I have a 5' x 10' CNC router table that needs around 30A of 208VAC three phase and the accompanying vacuum pump is another 10HP.... "

The question is (If you have three why would you need converter?)
To me it simple just change a meter ring to 4 pole and skip the converter Their may be some else that I do not know at this time

Dave

I interpret Lintelle's inquiry to be is my design scaleable since that was what he asked.

[Henri]

Interesting Rob, thanks for posting that! We can add a note to the plans about compatibility with Australian electrical systems.

If the plans won't work in your country, you can always use our 30-day money back guarantee. Just send me an email to plans@homemadetools.net and I'll process the refund instantly.

Just thought I should add t this discussion: The same problem experienced by Rob would most likely also apply to New Zealand and South Africa, among others, as former British colonies. We inherited the British system and hence the 220V single phase supply.

[smithdoor]

Rotary type will work on 220 v 50 hz
FYI in 2000's they change the voltage to 240v still 50hz see http://ewh.ieee.org/r10/nsw/subpages...e-Voltages.pdf
What size are planning on building???


Dave

Just thought I should add t this discussion: The same problem experienced by Rob would most likely also apply to New Zealand and South Africa, among others, as former British colonies. We inherited the British system and hence the 220V single phase supply.

[nhengineer]

Just thought I should add t this discussion: The same problem experienced by Rob would most likely also apply to New Zealand and South Africa, among others, as former British colonies. We inherited the British system and hence the 220V single phase supply.

Ah so, this situation is not unique to Australia then. That means my design will not work for any former British Crown Colony location and GB itself. I'll see if I can find a work around.