Bidirectional inverter-charger

摘要

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.

主权项

1. A bidirectional inverter-charger comprising:
a first stage configured to be coupled between a source of energy or a load and coupled with a link storage, the first stage including at least one inductor coupled with a first bridge receiving control signals from at least one digital controller; a second stage coupled between the link storage and configured to be coupled with a battery, the second stage including a DC-to-DC converter receiving control signals from the at least one digital controller, the DC-to-DC converter comprising a transformer coupled between a first H-bridge and a second H-bridge, the first H-bridge coupled with the link storage and the second H-bridge coupleable with the battery; the first stage providing power factor correction and a voltage boost of the source of energy to the link storage while charging the battery and inverting when providing power to the source of energy or the load from the battery; the second stage providing a controllable charge current to the battery while charging the battery and providing a voltage boost of a voltage of the battery to the link storage while inverting the power from the battery; while charging the battery, the first H-bridge providing a first square wave to the transformer from the link storage, the transformer providing isolation and providing the first square wave to the second H-bridge, the second H-bridge rectifying the first square wave to provide a specified charge current to the battery; and while inverting, the second H-bridge providing a second square wave to the transformer from the battery, the transformer providing isolation and providing the second square wave to the first H-bridge, the first H-bridge rectifying the second square wave and providing a voltage to the link storage.