Simple Full Wave Rectifier circuitry, using a 3 phase 3 wire Delta input.
Compare this schematic and wave plots to the 1 phase full wave bridge schematic and wave plots [separate topic]. This Rectifier has a raw pulsating output which is much smoother [stable] even before going through the filter.
Reference of AC output from transformer's secondary, to Rectifier's input. Plotted points are [AC] on the schematic.
Resulting pulsations [Pulsating DC] from Rectifier's output, and at filter's input. Plotted at [+DC] and [-DC] points.
Smoothed DC output from filter. Plotted at [+DC OUT] and [-DC OUT] points.
Compared to the 1 phase bridge circuit, this one has a much more stable DC output.
FYI: Trade this 3 phase 3 wire Delta transformer for one of the 6 or 9 phase ones I posted before [the "Rectifier Transformers"], and add another set [or two] of Diode Trios, then figure the pre filter DC output. The ripple will be lowered even more than the 3 phase one shown here.
What's all this mean, or is good for??? Who the heck knows
Seriously, it is a premium DC supply for things like Inverters, UPS's, Electronic stuff [like power amps, etc.]. The most common and ordinary example of a 3 phase input rectifier would be Automotive Alternators.
They are primarily Wye wound Stators, but some heavy duty applications use a Delta wound Stator.
The rotating field [2 pole mostly] is controlled via the regulator circuitry. This regulation controlls the peak voltage output and stuff like that [technically speaking].
Discussion thread and links to follow sometime this weekend [hopefully].
You may contact me directly if there's any questions that can't wait
Scott SET 08/31/2001