Patent ID: 8743573

Claim:
A voltage inverter comprising: a load having n phases, each phase having a first terminal and a second terminal; a first cell and a second cell each comprising n branches, each branch comprising: two switches connected in series, each switch being able of being placed in a passing state or a blocking state, a mid-point located between the two switches, each first terminal of each of the load phases being connected to one of the mid-points of the first cell, each second terminal of each of the load phases being connected to one of the mid-points of the second cell, a voltage source, wherein the first cell is connected to the positive terminal of the voltage source via a first electrical isolator and to the negative terminal of the voltage source via a second electrical isolator, and wherein the second cell is connected to the positive terminal of the voltage source via a third electrical isolator and to the negative terminal via a fourth electrical isolator, each electrical isolator being able of being placed in a passing state or a blocking state, and wherein the voltage inverter further comprises a malfunction control and monitoring device configured to: control the switches and the electrical isolators, detect a malfunction in one of the switches, and detect a malfunction in the connection between one of the terminals of one of the phases and one of the mid-points.