POWER CONVERSION CIRCUIT, POWER TRANSMISSION SYSTEM, AND POWER CONVERSION SYSTEM

摘要

A power conversion circuit includes multiple input-side capacitors connected in series between input terminals; series circuits composed of high-side switching elements and low-side switching elements connected in parallel to the multiple input-side capacitors; and output-side capacitors connected between nodes and a node. The circuit further includes an output-side inductor connected to the node and a controller that alternately turns on and off the high-side switching elements and the low-side switching elements. Each of the low-side switching elements and the high-side switching elements is a MOSFET and causes current to flow from the low side to the high side using a body diode. Accordingly, there is provided a power conversion circuit that has high conversion efficiency and that is capable of realizing reduction in size, a power transmission system, and a power conversion system.

主权项

1. A power conversion circuit comprising:
a first input terminal and a second input terminal; a plurality of three-terminal switching circuits connected in series or in parallel between the first and second input terminals, each three-terminal switching circuit including a first input, a second input, and an output; an inductive impedance element connected between the outputs of the three-terminal switching circuits and a load; and a switching controller configured to control switching of the three-terminal switching circuits, wherein each three-terminal switching circuit includes:
an input-side capacitor connected between the first and second inputs;a series circuit that is connected in parallel to the input-side capacitor and includes a high-side switching element and a low-side switching element; anda DC cut element connected between the high-side and low-side switching elements and the output, and wherein the switching controller is configured to alternately turn on and off the high-side and low-side switching elements in each of the three-terminal switching circuits.