Voltage inverter and method of controlling such an inverter

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.