Five-level half bridge inverter topology with high voltage utilization ratio

A single phase five-level inverter topology for use with a first DC power supply and a second DC power supply connected in series, comprising a half-bridge inverter circuit that outputs five mutually different voltage levels including zero;

• wherein the half-bridge inverter circuit comprises a floating capacitor, a circuit module, a first switching circuit branch, a second switching circuit branch, a third switching circuit branch, a fourth switching circuit branch, a fifth switching circuit branch and a sixth switching circuit branch;
• the circuit module in the half-bridge inverter circuit comprises a first terminal, a second terminal, a third terminal, a fourth terminal and a fifth terminal;
• the first terminal of the circuit module is connected to a common terminal of the first DC power supply and the second DC power supply;
• the fourth terminal of the circuit module is connected to a positive terminal of the first DC power supply;
• the fifth terminal of the circuit module is connected to a negative terminal of the second DC power supply;
• a first terminal of the first switching circuit branch is connected to the positive terminal of the first DC power supply;
• a second terminal of the first switching circuit branch is connected to a first terminal of the second switching circuit branch;
• a second terminal of the second switching circuit branch is connected to the negative terminal of the second DC power supply;
• a first terminal of the third switching circuit branch is connected to both the second terminal of the circuit module and a positive terminal of the floating capacitor;
• a second terminal of the third switching circuit branch is connected to a first terminal of the fourth switching circuit branch;
• a second terminal of the fourth switching circuit branch is connected to both the third terminal of the circuit module and a negative terminal of the floating capacitor;
• a common terminal of the third switching circuit branch and the fourth switching circuit branch is connected to a common terminal of the first switching circuit branch and the second switching circuit branch;
• a first terminal of the fifth switching circuit branch is connected to the positive terminal of the floating capacitor;
• a second terminal of the fifth switching circuit branch is connected to a first terminal of the sixth switching circuit branch;
• a second terminal of the sixth switching circuit branch is connected to the negative terminal of the floating capacitor;
• a common terminal of the fifth switching circuit branch and the sixth switching circuit branch is connected to a first terminal of AC utilities or AC load.