Bidirectional series resonant DC-DC converter

摘要

A series resonant DC/DC converter comprises first DC terminals T1P, TIN, second DC terminals T2P, T2N, an inductor device TD, a first switching circuit SC1 connected between the first DC terminals and the inductor device and a second switching circuit SC2 and a resonant circuit RC connected between the inductance and the second terminals. The first switching circuit comprises first S1sc1 and second S2sc1 sets of switches. A control circuit controls the sets of switches of the first and second switching circuits to control the current and/or voltage at either the first DC terminals (TIP, T1N) or the second DC terminals (T2P, T2N). The inductor device may be a single inductor (see fig. 7) or a transformer. The series resonant converter may be bi-directional and used for charging and discharging a rechargeable battery, particularly as part of an AC UPS (uninterruptible power supply).