(Solved): 7. Solar inverter common mode voltage Background: Inverters convert direct current produced by sola ...

7. Solar inverter common mode voltage Background: Inverters convert direct current produced by solar panels into alternating current to feed the electric grid. An undesirable "common mode" AC voltage shown in the graph ${}^{20}\mathrm{can}$ emerge on the metal frame of the panel, creating an electric shock hazard for workers. High voltage $\mathrm{AC}$ is much more dangerous than high voltage $\mathrm{DC}$. Problem: Express the voltage as a cosine function of time. Make amplitudes, offsets, and frequencies accurate to $15\%$ and phase angles accurate to $15^{?}$.