keiththevp
New Member
Hello,
I am trying to create a dual source power supply that on one side can supply 0-150v DC low amps and on the other side 0-20v DC high amps. I have attached a VERY basic schematic that shows all the parts I am planning on using. Now here is my problem... both sources use the same output to load, therefore I am worried if one side is on and the other is off that the side that is on will back feed power into the side that is off and create a problem. If you wouldn't mind checking the attached drawing and letting me know if it is OK or if I need to add some more protection to stop the two sources from interfering or damaging each other. The only abnormal thing in the wiring is the transformers on the 0-20v DC side. Their DC ground output is on the transformer and NOT coming off the bridge rectifiers. This is the part that worries me. I believe that the bridge rectifier on the 150v side would stop any back-feed of current but since it can not be wired that way on the transformer side I am worried they will be damaged.
Thank you in advance for any help you electronic experts can offer!!!
Thanks,
Keith
I am trying to create a dual source power supply that on one side can supply 0-150v DC low amps and on the other side 0-20v DC high amps. I have attached a VERY basic schematic that shows all the parts I am planning on using. Now here is my problem... both sources use the same output to load, therefore I am worried if one side is on and the other is off that the side that is on will back feed power into the side that is off and create a problem. If you wouldn't mind checking the attached drawing and letting me know if it is OK or if I need to add some more protection to stop the two sources from interfering or damaging each other. The only abnormal thing in the wiring is the transformers on the 0-20v DC side. Their DC ground output is on the transformer and NOT coming off the bridge rectifiers. This is the part that worries me. I believe that the bridge rectifier on the 150v side would stop any back-feed of current but since it can not be wired that way on the transformer side I am worried they will be damaged.
Thank you in advance for any help you electronic experts can offer!!!
Thanks,
Keith