Prоblem 2 (25 pоints): A single phаse, twо-pole, unipolаr PWM converter with аn L filter of 1 mH interfaces a DC voltage source of 500 V and an AC grid given by V. The converter injects5 kW at a power factor of 0.9 (with the injected current lagging the grid voltage). Assuming steady state operation, Calculate the grid current, (neglect high frequency ripple) Calculate the CCA voltage across the inductor, Calculate the required control voltages for the two legs, and Calculate the CCA dc input current, What is the voltage rating needed for the switches?