| 摘要 |
A three-level inverter circuit includes first to fourth front-stage switches connected in series, and a floating capacitor connected between a connection point of the first and second front-stage switches and a connection point of the third and fourth front-stage switch elements, and outputs an intermediate voltage of a DC power supply through a connection point of the second and third front-stage switches. A bridge circuit includes first, second, third, and fourth rear-stage switches which are bridge-connected to first to fourth terminals. The first terminal thereof is connected to a connection point of the second front-stage switch and the third front-stage switch and a second terminal thereof is connected to the second input terminal. |
| 主权项 |
1. An inverter device that receives input of a direct-current voltage through a first input terminal and a second input terminal and outputs an alternating-current voltage through a first output terminal and a second output terminal, the inverter device comprising:
a three-level inverter circuit including:
first, second, third, and fourth front-stage switches which are connected in series between the first input terminal and the second input terminal; andan intermediate voltage output circuit in which a first terminal is connected to a connection point of the first front-stage switch and the second front-stage switch and a second terminal is connected to a connection point of the third front-stage switch and the fourth front-stage switch, and which outputs an intermediate voltage of the direct-current voltage through a connection point of the second front-stage switch and the third front-stage switch; a bridge circuit including first, second, third, and fourth rear-stage switches which are bridge-connected to first, second, third, and fourth terminals, the first terminal of the bridge circuit being connected to a connection point of the second front-stage switch and the third front-stage switch, the second terminal of the bridge circuit being connected to the second input terminal, the third terminal of the bridge circuit being connected to the first output terminal, and the fourth terminal of the bridge circuit being connected to the second output terminal; and at least one inductor configured to perform a smoothing action. |
