how to generate 3-phase 208vac from single-phase 208vac motor
how to generate 3-phase 208vac from single-phase 208vac motor
(OP)
can i wire a 3phase motor to a single phase 208vac circuit and generate an ac output of 208vac 3-phase?
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how to generate 3-phase 208vac from single-phase 208vac motor
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how to generate 3-phase 208vac from single-phase 208vac motorhow to generate 3-phase 208vac from single-phase 208vac motor(OP)
can i wire a 3phase motor to a single phase 208vac circuit and generate an ac output of 208vac 3-phase?
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RE: how to generate 3-phase 208vac from single-phase 208vac motor
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: how to generate 3-phase 208vac from single-phase 208vac motor
RE: how to generate 3-phase 208vac from single-phase 208vac motor
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: how to generate 3-phase 208vac from single-phase 208vac motor
Correct me if I am wrong, but the way that I read your question is that you have 208 volt single phase available and you also have a 208 volt three phase motor available and you wish to use that to convert the single phase to three phase.
You can do this provided that you have the motor spinning at the correct speed. Once the motor is up to speed, it will continue to run at full speed on a single phase supply provided that the load is not high.
If a three phase motor is operating at full speed and has two phases applied (essentially single phase across two terminals) it will regenerate the third phase out the third terminal.
If you were to couple the three phase motor to a single phase motor, and connect the 208 volt across two terminals on the three phase motor, you would have a single to three phase rotary converter.
Is that what you were looking for??
Best regards,
Mark Empson
L M Photonics Ltd
RE: how to generate 3-phase 208vac from single-phase 208vac motor
RE: how to generate 3-phase 208vac from single-phase 208vac motor
RE: how to generate 3-phase 208vac from single-phase 208vac motor
Roy
RE: how to generate 3-phase 208vac from single-phase 208vac motor
If you see 208 volts on single phase, call the utility and complain. Single phase is 120 volts and two phase or three phase is 208 volts.
But, large apartment buildings and commercial buildings have three phase services.
200 amps is often the limit for single phase services but you may find the odd 400 amp single phase service. Finding single phase 400 amp service equipment may be a challenge.
Commercial buildings will have three phase sub panels but apartments often have single phase sub panels running on two phases at 120/208 vols. You will encounter this one day, and you will now be able to recognize and understand the system when you see it.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: how to generate 3-phase 208vac from single-phase 208vac motor
In this split phase case, maybe it's going through 2 separate windings, but in series they act like one.
RE: how to generate 3-phase 208vac from single-phase 208vac motor
RE: how to generate 3-phase 208vac from single-phase 208vac motor
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: how to generate 3-phase 208vac from single-phase 208vac motor
RE: how to generate 3-phase 208vac from single-phase 208vac motor
V = 120sin(Theta) - 120sin(Theta - 2Pi/3)
= 120sin(Theta) - 120[sin(Theta)cos(2Pi/3)-cos(Theta)sin(2Pi/3)
= 120sin(Theta) + 60sin(Theta) + 104cos(Theta)
= 180sin(Theta) + 104cos(Theta)
= 208sin(Theta - Pi/3)
Curt Wilson
Delta Tau Data Systems
RE: how to generate 3-phase 208vac from single-phase 208vac motor
RE: how to generate 3-phase 208vac from single-phase 208vac motor
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: how to generate 3-phase 208vac from single-phase 208vac motor
If you're only looking for 1.5kW RMS for an example.
Keith Cress
kcress - http://www.flaminsystems.com