POWER CONVERSION APPARATUS

摘要

An isolated power conversion apparatus has an isolation transformer, a series circuit including a load and an inductor connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means disposed between the series circuit and the secondary side of the isolation transformer, the switching means being bidirectional. This apparatus sends out power from a DC power supply of a primary side of the isolation transformer toward the load as DC power or AC power of an arbitrary polarity, or regenerates and supplies the DC power or AC power from the load to the DC power supply.

主权项

1. An isolated power conversion apparatus having an isolation transformer, the apparatus comprising:
a primary coil, a first secondary coil and a second secondary coil that are provided for the isolation transformer, a first end of the first secondary coil being connected to a first end of the second secondary coil; a first switching means disposed between a DC power supply and the primary coil, the first switching means driving the primary coil in a forward direction; a second switching means disposed between the DC power supply and the primary coil, the second switching means driving the primary coil in a reverse direction; a series circuit including a load and an inductor connected in series with each other, the series circuit being disposed in a side of the secondary coils; and a plurality of fourth switching means disposed between the series circuit and the first or second secondary coils, the fourth switching means being bidirectional, the series circuit being provided with the fourth switching means in series without any switching means in parallel, each of a second end of the first secondary coil and a second end of the second secondary coil being connected to at least one of the fourth switching means, wherein the isolated power conversion apparatus sends out power from the DC power supply toward the load as either DC power or AC power of an arbitrary polarity, or regenerates and supplies either the DC power or AC power from the load to the DC power supply.