The three-phase half-bridge inverter shown below feeds a balanced Y-connected purely inductive load having inductance L per phase, and is operated in the square-wave mode (pole voltages are square waves) at the frequency fs. (a) Sketch phase-to-neutral voltage van (show all important voltage and time values) and find its rms value Van,rms. (b) Find the peak-to-peak value (Ipp) of the line current is in terms of L and fs. +