Hi all,
I found a
Traco Power schematics, which has the same connection diagram as mentioned in
this topic, but I still have several questions. The idea is to use two AC/DC +15Vdc power supplies to create +/-15Vdc power supply.
1. My PCB has three inputs: +15Vdc, -15Vdc and GND. Where should I connect common connection from a 'new' power supply (-Vout from PS1 to +Vout from PS2)?
2. In my case +15Vdc will have a higher load (+5Vdc circuits, LEMs and IGBT driver supply) and -15Vdc will have a smaller load (only IGBT driver supply) which will lead to common point being not zero. Will this affect +/-15Vdc values, i.e. will they drift or osculate?
3. Should I connect a power supply common point to GND PCB input? But the PCB's GND is connected to metallic enclosure GND and in that case the voltage will be different between GND and common point (because of load unbalance). Should I disconnected enclosure from the PCB, connect GND to enclosure and use common for GND on PCB?
Thank you in advance.