Three phase from single phase
Three phase from single phase
(OP)
I am looking for a device to generate three phase signal from a single phase transformer. I appreciate any feedback on this.
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Three phase from single phase
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RE: Three phase from single phase
Power?
Signal?
Run a motor?
Run some other device?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Three phase from single phase
Suppose I have a 120/6V transformer 50VA, how can I generate a three phase signal from this XFMR.
I beleive power will be divided by three now.
RE: Three phase from single phase
Add an RL circuit to develop a 60 degree phase shift of the opposite rotation. Again reverse the polarity for the 120 degree shift of the third phase.
small power levels of three phase may be generated by a Roto-Phase. This is a three phase motor started and run on single phase with the aid of capacitors. Once started a three phase motor will continue to run on one phase. It acts as an induction generator and three phase power may be supplied from the three motor line terminals.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Three phase from single phase
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RE: Three phase from single phase
I thought there must be a commercial unit available by now to do this kind of conversaions..something that you input single phase and you get three phase out. Motor will be too big.I need sth. that I can use in a small box.
RE: Three phase from single phase
With this approach, all you need is a power supply circuit and a 3-phase generator circuit.
RE: Three phase from single phase
RE: Three phase from single phase
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Three phase from single phase
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Three phase from single phase
RE: Three phase from single phase
RE: Three phase from single phase
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Three phase from single phase
No LUCK..has anyone tried this before!!!!!!!!
Ok here is what I done...
6V secondary transformer 43VA- a 3.3micro cap + a pot.
and a 1M resistor as a load.
I cant seem to be able to vary the phase angle, even when I change the pot!!
even without the pot ,I cant get the 90 deg. phase shift that the cap is supposed to provide!, hmmmmm, any ideas?
RE: Three phase from single phase
Try this, ground the point where the resistor connects to the transformer. Use this point as the common for a two trace scope. Connect one probe across the transformer and the other probe across the resistor.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Three phase from single phase
RE: Three phase from single phase
I am using two channel scope and I am using N as a common point and CH1 connected to xfmr and CH2 after cap( On load resistor )
------/\/\/\/\ |---||----|CH2
CH1 | | |
------| |
\
/
\
/
|
N( Common) |
---------------------------
RE: Three phase from single phase
CODE
CH1 | | |
------| |
\
/
\
/
|
N( Common) |
---------------------------
RE: Three phase from single phase
RE: Three phase from single phase
I'll leave it up to you to add power op-amps or other circuitry to the 3 op-amp outputs to increase the output power of the circuit if that is required.
RE: Three phase from single phase
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Three phase from single phase
RE: Three phase from single phase
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: Three phase from single phase
htt
Somewhere, I have a more elaborate version of the
circuit already posted; let me know if you want it
and I will attempt to dig it up.
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