Timeline for Questions about current flow, power supplies, and floating/grounded loads
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 7, 2017 at 20:19 | comment | added | Andy aka | A transformer isolates secondary from primary and not from the load. I think you misquoted me! | |
| Jan 7, 2017 at 20:18 | comment | added | Andy aka | No return path means no impetus for current to want to flow. Sure you can create a big voltage and spray electrons seemingly into the air but that is the power of like charges repelling. We don't want that to happen in most circuits so we keep voltages low and use insulation but, with no path for current to flow back to the negative terminal there is no continuous stream. | |
| Jan 7, 2017 at 19:40 | comment | added | XZE1527 | Also for the second question, you mentioned the transformer is isolated from the load? I know that the transformer moves the voltage value down, and the rectifier converts to DC. In that picture I posted to the left, for the floating load scenario, what physical component of this circuit is allowing the current to loop back to the + side of the load, if the transformer/rectifier is isolated? | |
| Jan 7, 2017 at 19:28 | comment | added | XZE1527 | Thank you for responding Andy. Can you dive further into why the lack of a return path makes no current flow? I can guess that with no return path, that's there's no electron chain getting pushed back to the negative terminal of the power supply, but shouldn't there be some charge that's put through the wire in this case to ground, like a short circuit? | |
| Jan 4, 2017 at 8:57 | history | answered | Andy aka | CC BY-SA 3.0 |