Method for controlling a series of resonant DC/DC converter and a series of resonant DC/DC converter controlled according to the method

摘要

The invention relates to a method for controlling a series resonant DC/DC converter. The method comprises the steps of: defining a switching period TP having a first half period TA and a second half period TB and defining a subsequent switching period TP+1 after the switching period TP. In a next step, a first set (S1sc1; S1sc1, S4sc1) of switches of a first switching circuit (SC1) is controlled to be ON from the beginning Tstart of the first half period TA minus a time interval DeltaTAE1, where the time interval DeltaTAE1 is provided at the end of the first half period TA and a second set (S2sc1; S2sc1, S3sc1) of switches of the first switching circuit (SC1) is controlled to be ON from the beginning Tcenter of the second half period TB minus a time interval DeltaTBE1, where the time interval DeltaTBE1 is provided at the end of the second half period TB. A first set (S1sc2; S1sc2, S4sc2) of switches of a second switching circuit (SC2) is controlled to be ON in the first half period TA minus a time interval DeltaTAS1 and minus a time interval DeltaTAE2, where the time interval DeltaTAS1 is provided at the beginning of the first half period TA and where the time interval DeltaTAE2 is provided at the end of the first half period TA and a second set (S2sc2; S2sc2, S3sc2) of switches of the second switching circuit (SC2) is controlled to be ON in the second half period TB minus time interval DeltaTBS1 and minus time interval DeltaTBE2, where the time interval DeltaTBS1 is provided at the beginning of the second half period TB and where the time interval DeltaTBE2 is provided in the end of the second half period TB. Time intervals Tsc1off1 and Tsc2off1, and time intervals Tsc1off2 and Tsc2off2, where the sets of the first and second switching circuits all are off, are at least partially overlapping.