Power conversion circuit, power transmission system, and power conversion system

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;
• and
• a 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.