Patent ID: 11936305
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A semiconductor device comprising
a first parallel connection body including a first semiconductor switching element and a first diode, the first diode connected in antiparallel to the first semiconductor switching element;
a second parallel connection body including a second semiconductor switching element and a second diode, the second diode connected in antiparallel to the second semiconductor switching element;
a third parallel connection body including a third semiconductor switching element and a third diode, the third diode connected in antiparallel to the third semiconductor switching element;
a fourth parallel connection body including a fourth semiconductor switching element and a fourth diode, the fourth diode connected in antiparallel to the fourth semiconductor switching element;
a fifth parallel connection body including a fifth semiconductor switching element and a fifth diode, the fifth diode connected in antiparallel to the fifth semiconductor switching element; and
a sixth parallel connection body including a sixth semiconductor switching element and a sixth diode, the sixth diode connected in antiparallel to the sixth semiconductor switching element, wherein
the first parallel connection body, the second parallel connection body, the third parallel connection body, and the fourth parallel connection body are connected in series, in order from the first parallel connection body to the second parallel connection body to the third parallel connection body to the fourth parallel connection body, from a first terminal having a first potential to a second terminal having a second potential which is lower than the first potential,
a connection portion between the second parallel connection body and the third parallel connection body is connected to an AC terminal,
the fifth parallel connection body and the sixth parallel connection body are connected in series, in order from the fifth parallel connection body to the sixth parallel connection body, from a first connection portion between the first parallel connection body and the second parallel connection body to a second connection portion between the third parallel connection body and the fourth parallel connection body,
a third connection portion between the fifth parallel connection body and the sixth parallel connection body is connected to a third terminal having a third potential which is smaller than the first potential and is larger than the second potential,
at least one of a second voltage drop of the second parallel connection body and a third voltage drop of the third parallel connection body is smaller than at least one of a first voltage drop of the first parallel connection body, a fourth voltage drop of the fourth parallel connection body, a fifth voltage drop of the fifth parallel connection body, and a sixth voltage drop of the sixth parallel connection body, and
voltage drops of each of the second semiconductor switching element, the second diode, the third semiconductor switching element, and the third diode are 1.8 V or less.