The working of the circuit can be explained as follows. The capacitor C is assumed to be charged to with polarity as shown, is conducting and the load current is a VC T1 IL constant. To turn offT1 , is triggered. L, C, and forms a resonant circuit. A resonant T2 T1 T2 currenti flows in the direction shown, i.e., in a direction opposite to that of load tc current . IL C (refer to the previous circuit description). WhereI & and i tc I L p p the capacitor voltage is given by 1 vc C 1 C L . vc C dt. Fig. 5.16: Resonant Pulse Commutation An Alternate Circuit – When becomes equal to (the load current), the current through becomes i tc IL T1 zero and turns off. This happens at time such that T1 t1 t1 sin IL I p IL L t1 VC C and the corresponding capacitor voltage is 1 v tc
The working of the circuit can be explained as follows. The capacitor C is assumed to be charged to VC with polarity as shown, T1 is conducting and the load current IL is a constant. To turn offT1 , T2 is triggered. L, C, T1 and T2 forms a resonant circuit. A resonant currenti tc flows in the direction shown, i.e., in a direction opposite to that of load current IL . C i tc I p (refer to the previous circuit description). WhereI p & L and the capacitor voltage is given by 1 vc C 1 C vc C L dt. . Fig. 5.16: Resonant Pulse Commutation – An Alternate Circuit When i tc becomes equal to IL (the load current), the current through T1 becomes zero and T1 turns off. This happens at time t1 such that t1 IL I sin p IL L t1 VC C and the corresponding capacitor voltage is v tc 1
U4_L23-Resonant-Pulse-Commutation.docx