Method for controlling a polyphase voltage inverter

Method of controlling a power bridge (1) intended to control an electrical load (3) comprising several phases, the power bridge (1) being intended to be connected to the electrical load (3) via several arms (B1, . . . , B3), at least one per phase, and being intended to be controlled by switching functions (SC1, SC2, SC3), the said switching functions determining control vectors ({right arrow over (V0)}, . . . , {right arrow over (V7)}) for controlling the load, the said control vectors ({right arrow over (V0)}, . . . , {right arrow over (V7)}) being subdivided into freewheeling control vectors ({right arrow over (V0)}, {right arrow over (V7)}), and active control vectors ({right arrow over (V1)}, . . . , {right arrow over (V6)}), the said method comprising the application of a method of producing switching functions that produces a reduced number of combinations of switching functions corresponding to freewheeling control vectors ({right arrow over (V0)}, {right arrow over (V7)}) in order to produce a succession of control vectors, characterised in that said method of producing switching functions comprises a step of selecting at least two bridge arms able to be inhibited according to an order relationship and a step of inhibiting, throughout the chopping period (Ts) of the power bridge (1), one of the said at least two bridge arms able to be inhibited.