Power converter
First Claim
1. A power converter including a plurality of power units, each of said power units comprising:
- an input transformer group including at least one input transformer having at least one primary winding connected with a first polyphase AC power supply, and at least one secondary winding;
a polyphase self-excited rectifier circuit connected with said secondary winding;
a single-phase self-excited inverter circuit; and
a DC link circuit connecting said single-phase self-excited rectifier circuit to said polyphase self-excited rectifier circuit to generate a single-phase power output, wherein mutually adjacent ones of said power units in each phase are sequentially cascaded in series with one another, with one of said power units at a first end of a cascade connection being connected with a polyphase AC load, another one of said power units at a second end of the cascade connection being connected with a neutral point, whereby electric power is input from said first polyphase AC power supply to said power units and output from said power units to said polyphase AC load, or the electric power of said polyphase AC load is regenerated to said first polyphase AC power supply.
1 Assignment
0 Petitions
Accused Products
Abstract
A power converter outputting a large current while reducing harmonics flowing into an AC power supply and an AC load. The power converter includes power units, each of which includes an input transformer having at least one primary winding connected with a polyphase AC power supply and at least one secondary winding, a polyphase self-excited rectifier circuit connected with the secondary winding, and a single-phase self-excited inverter circuit connected with the polyphase self-excited rectifier circuit through a DC link circuit to generate a single-phase output. One of single-phase outputs of each power unit is connected with one of single-phase outputs of another power unit so that the outputs of the power units are cascaded in series with one another, with serially connected outputs of the power units connected to a polyphase AC load.
20 Citations
19 Claims
-
1. A power converter including a plurality of power units, each of said power units comprising:
-
an input transformer group including at least one input transformer having at least one primary winding connected with a first polyphase AC power supply, and at least one secondary winding;
a polyphase self-excited rectifier circuit connected with said secondary winding;
a single-phase self-excited inverter circuit; and
a DC link circuit connecting said single-phase self-excited rectifier circuit to said polyphase self-excited rectifier circuit to generate a single-phase power output, wherein mutually adjacent ones of said power units in each phase are sequentially cascaded in series with one another, with one of said power units at a first end of a cascade connection being connected with a polyphase AC load, another one of said power units at a second end of the cascade connection being connected with a neutral point, whereby electric power is input from said first polyphase AC power supply to said power units and output from said power units to said polyphase AC load, or the electric power of said polyphase AC load is regenerated to said first polyphase AC power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification