If you have 3 200 volt wires coming in and there all running electricity, what difference does it make if you switch any 2 wires? Its still just 3 lines coming to the motor? Please do not just say it changes the polarity. Im looking for a good explanation.
2006-10-29 08:23:19 · 2 answers · asked by flavorlicious 2 in Science & Mathematics ➔ Engineering
THAT'S the answer men you changes the polarity,and it changes from dc current to ac or from ac to dc.For example if I have a welding machine and I need I higher voltage I change the polarity form dc to ac.
2006-10-29 12:24:12 · answer #1 · answered by The Apostle 2 · 0⤊ 0⤋
a 3 phase motor has 3 windings whose centers are separated by 120° mechanically. The phases in a 3-phase system are separated by 120° electrically. The sum of the magnetic fields produced by these currents has a constant magnitude, and rotates the direction determined by connection of the phase wires.
Arbitrarily giving ABC as one direction of rotation, then
BAC = ACB = CBA reverses the rotation of the field in the motor, reversing its rotation.
2006-10-29 08:40:37 · answer #2 · answered by Helmut 7 · 0⤊ 1⤋