I wonder if anyone knows of a small portable device that would simulate the voltage waveforms of the split-phase US residential electric grid.
Just need the reference voltage waveform, no need for any appreciable current sourcing or sinking (the device would have a high-Z output – see below).
Preferably an off-the-shelf device, or something that can be easily modified for that purpose. I try to avoid building one using the sine wave generator, phase shifter, boost converter, amplifier, etc – too much trouble that way.
Ideally envision a black box, with a low-voltage DC power supply input (say 12 Vdc).
The output is 3-wires, like the US residential grid split-phase transformer: L1, L2, N (N can be bonded to ground).
When measured between the output wires the sineusoidal voltage is just like the grid: 120Vac rms (N-L1 and N-L2), and 240 Vac rms (L1-L2), with the 180 deg phase difference between L1 and L2.
Thanks for any ideas, Jack
Just need the reference voltage waveform, no need for any appreciable current sourcing or sinking (the device would have a high-Z output – see below).
Preferably an off-the-shelf device, or something that can be easily modified for that purpose. I try to avoid building one using the sine wave generator, phase shifter, boost converter, amplifier, etc – too much trouble that way.
Ideally envision a black box, with a low-voltage DC power supply input (say 12 Vdc).
The output is 3-wires, like the US residential grid split-phase transformer: L1, L2, N (N can be bonded to ground).
When measured between the output wires the sineusoidal voltage is just like the grid: 120Vac rms (N-L1 and N-L2), and 240 Vac rms (L1-L2), with the 180 deg phase difference between L1 and L2.
Thanks for any ideas, Jack