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Posted by Dave Bates (198.161.212.6) on June 06, 2001 at 07:59:50:
In Reply to: Three Phase Power posted by Johnny Potato on March 05, 2001 at 15:38:00:
: Hi,
: Can anyone please explain how three phase power works? I don't see how 415v -> 230v for example.
: Cheers!
: Johnny
Three phase power is generated by taking 3 windings and placing them 120 degrees apart. As these windings are rotated on a magnetic field, you induce a voltage in each of the windings.
There will be a sine wave in each of the windings.
To get the voltages that that you gave as an example. you take the phase voltage (voltage the is generated in one winding)and added to the voltage of another winding
We add this voltages together, but remember that they are at different angle because each winding is 120 degrees apart.
the ease way to find your voltages is to take your phase voltage and multiply it by root 3.
I have some diagrams but I can't attach them
Dave