The intermediate voltage across the capacitor is fed back to {HEAD ~ the second controller} which in turn changes {TAIL ~ the PWM signal} to regulate the intermediate voltage 
changes
The intermediate voltage across the capacitor is fed back to { HEAD ~ the second controller } which in turn changes { TAIL ~ the PWM signal } to regulate the intermediate voltage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH