Patent ID: 7880426

Claim:
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 (B 1 , . . . , B 3 ), at least one per phase, and being intended to be controlled by switching functions (SC 1 , SC 2 , SC 3 ), the said switching functions determining control vectors ({right arrow over (V 0 )}, . . . , {right arrow over (V 7 )}) for controlling the load, the said control vectors ({right arrow over (V 0 )}, . . . , {right arrow over (V 7 )}) being subdivided into freewheeling control vectors ({right arrow over (V 0 )}, {right arrow over (V 7 )}) and active control vectors ({right arrow over (V 1 )}, . . . , {right arrow over (V 6 )}), characterised in that the method comprises the steps of: selecting a first method of producing switching functions that produces a reduced number of combinations of switching functions corresponding to freewheeling control vectors ({right arrow over (V 0 )}, {right arrow over (V 7 )}) or a second method of producing switching functions that produces solely combinations of switching functions corresponding to active control vectors ({right arrow over (V 1 )}, . . . , {right arrow over (V 6 )}), the said methods being defined according to a given set voltage vector ({right arrow over (V*)}) and comprising a step of determining a modulant (mod 1 , mod 2 , mod 3 ) associated with each arm of the bridge from scalar voltage set values (V 1 *, V 2 *, V 3 *) and applying the said selected method for producing a succession of control vectors from combinations of switching functions produced.