Hi guys. So I currently pursuing the idea of building a variable DC bench power supply allowing for bipolar voltages. I have a bit of trouble understanding what to do in regards with the grounding reference of the soon to be DC PSU.
So most sources recommend using a center-tapped transformer. My question in regards with the center-tapped transformer is whether or not to connect the center tap of the secondary side to the earth (ground) provided by the wall plug or just use the center tap as a reference to ground (sort of like a virtual ground)? (See the dual-supply image)
Other sources suggest using a dual output transformer and then to rectify each output and finally connect the two outputs in series and grounding the section of wire between the 2 DC supplies. Again, is this ground only a reference voltage or should it also be physically grounded? (see the other image)
Thanks
So most sources recommend using a center-tapped transformer. My question in regards with the center-tapped transformer is whether or not to connect the center tap of the secondary side to the earth (ground) provided by the wall plug or just use the center tap as a reference to ground (sort of like a virtual ground)? (See the dual-supply image)
Other sources suggest using a dual output transformer and then to rectify each output and finally connect the two outputs in series and grounding the section of wire between the 2 DC supplies. Again, is this ground only a reference voltage or should it also be physically grounded? (see the other image)
Thanks
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