Building static phase converter?

[[email protected]]

We have two right now that we use on our 3 phase motors. One of them
was damaged(The cap exploded) and the boss when he saw how it was made
wants to make a couple more. I'm wanting to know some theory before
starting. The machines to be run from this are up to 3 hp max. One
lathe, Bridgeport, surface grinder.
I told him we should use someold 3 phase motors we have to make
rotart phase converters but boss said no so trying to make a couple
static ones is where were headed
Ken

 

[John Larkin]

We have two right now that we use on our 3 phase motors. One of them
was damaged(The cap exploded) and the boss when he saw how it was made
wants to make a couple more. I'm wanting to know some theory before
starting. The machines to be run from this are up to 3 hp max. One
lathe, Bridgeport, surface grinder.
I told him we should use someold 3 phase motors we have to make
rotart phase converters but boss said no so trying to make a couple
static ones is where were headed
Ken

Tell him you'll need three years and $250,000, but no guarantees.

John

 

[Rich Grise]

We have two right now that we use on our 3 phase motors. One of them
was damaged(The cap exploded) and the boss when he saw how it was made
wants to make a couple more. I'm wanting to know some theory before
starting. The machines to be run from this are up to 3 hp max. One
lathe, Bridgeport, surface grinder.
I told him we should use someold 3 phase motors we have to make
rotart phase converters but boss said no so trying to make a couple static
ones is where were headed

You'll never be able to make one for what you could buy one for. Just tell
the boss to spring the couple hundred bucks, because if you try to make one
from scratch, the bill will be approaching $10,000.00, before any hardware
is even in place.

Good Luck!
Rich

 

[[email protected]]

We have two right now that we use on our 3 phase motors. One of them
was damaged(The cap exploded) and the boss when he saw how it was made
wants to make a couple more. I'm wanting to know some theory before
starting. The machines to be run from this are up to 3 hp max. One
lathe, Bridgeport, surface grinder.
I told him we should use someold 3 phase motors we have to make
rotart phase converters but boss said no so trying to make a couple
static ones is where were headed
Ken

Cheaper to buy 1 but not hard to make, visit the IR website look for
the "power train" product.

 

[Bob Masta]

Cheaper to buy 1 but not hard to make, visit the IR website look for
the "power train" product.

I think what the OP is talking about is not an active
device (switchmode or whatever), but a simple
circuit of capacitors and old motor windings or
something. A relative who has a small machine
shop in his garage uses this sort of circuit to
run his 3-phase machines from his normal 220
mains. (I'm not gonna get into whether the mains
are single phase or two phase!) Anyway, I agree
with the OP's boss that the circuit looked pretty
simple, but as I recall it did call for an old motor
that had to be rated high enough to handle the
desired loads. I don't think the motor turned,
so it could still be called a "static phase converter",
but I suspect that there is another name that
machinists use for these gizmos, and I'm sure
there must be plans on the Web. Maybe try
search terms like "3-phase converter"?

Best regards,

Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator

 

[[email protected]]

Anyway, I agree
with the OP's boss that the circuit looked pretty
simple, but as I recall it did call for an old motor
that had to be rated high enough to handle the
desired loads.
Your talking about a rotary phase converter. This is what we should be
using but I'm not incharge just the drone who does all the work
Ken

 

[Mike]

My father had a rotary converter made from a "friend" electrician, which
only cost him a few hundred bucks. The motor he had already, which was 10HP.
Worked very nicely.

Mike