Abstract: A bidirectional inverter-charger includes a first stage receiving or delivering energy from a line or to a load. The first stage including at least one inductor coupled with a split phase bridge. A link storage is connected between rails of a first bus and between the first stage and a second stage. The second stage includes a DC-to-DC converter connectable to a battery. The DC-to-DC converter includes a transformer providing galvanic isolation between a second bridge, connected between the rails of the first bus, and a third bridge connected between the rails of a second bus. In operation, the first stage provides power factor correction and a voltage boost while charging the battery and inverting when providing power to the line or the load. The second stage provides a controllable charge current to the battery and a voltage boost of a voltage of the battery to the link storage.

Abstract: Aspects of the present disclosure involve a charging system that provides a consistent specified charge power to a battery. Aspects of the disclosure also involve a bi-directional inverter charger system using boost and buck topologies substantially similar to buck and boost topologies for the charging system.

Abstract: A bi-directional inverter-charger including a bridge rectifier and DC-to-DC conversion components. The inverter-charger may be connected between an alternating current source, e.g., an AC line, and a direct current source, e.g., a battery pack. The DC-to-DC conversion components may include boost and buck circuits that are switchably configured between a charge mode and an inverter mode such that common components are used in both charge and inverter configurations. In the charge configuration, a full wave rectified signal from the H-bridge is up converted by the boost circuit, and the buck circuit controls charge current to the direct current source. In the inverter configuration, the boost circuit up converts the direct current voltage source, and the buck circuit controls the current and its form to the bridge circuit so that the bridge circuit may be Connected directly with the AC source.