Electronic – Three-phase rectifier for offline single-phase supplies

ac-dcpowerpower electronicspower supplyrectifier

First thank you for the help. I'll try to explain my self for this problem and sorry in advance if I'm not very clear, english is not my native language.

I'm making a universal PCB design involving an AC/DC converter. The places where I will install this is in three phase four wire system, three phase three wires systems, and monophasic. Due to this I don't know how to attach my input to the AC/DC converter. I did a research and found that using a three phase may works when you have a three phase three wire systems as I attach next.

Three phase supply

But in this design I'm not using the neutral cable, and if I install this device in a monophasic system won't work at least I connect neutral to L1,L2 or L3. But that won't work for my design purposes. What I would like to achieve is using an universal design that doesn't matter if is 3phase 4 wire or 3phase 3 wires or monophasic. Looking forward, I found this design:

Second design

I understand that the voltage may increase over 564dc or higher, as the source says. But my AC/DC can handle it. My conclusion is that I can use the last design as follow:

My design

Please correct me, I'm wrong.

Sources:

First design
Second design
My AC/DC Module

Best Answer

The power consumption of the RAC05-K/480 is so small that you can take the circuit named "Phase to Phase Application" in your first figure and don't need to worry about unbalacing issues. That would be the simplest solution.