| 摘要 |
<p>The present invention relates to a method for controlling an electrical device (10) for driving an alternating-current motor (6). Said device (10, 20) includes: a voltage inverter with three-phase bridge (5) for controlling the alternating-current electric motor (6) by pulse-width modulation, and powered by a direct-current source (3), said voltage inverter (5) having a plurality of switches (7) in which the various switching positions generate a set of space vectors corresponding to the various voltage states output by the inverter (5); and a DC-DC voltage converter (9) connected between the DC voltage source (3) and the voltage inverter with three-phase bridge (5), the method including a step of controlling the switching of the switches (7) according to a sequence generating a voltage vector resulting from a combination of non-zero space vectors, the phase of the resulting voltage vector varying continuously over time. The method also includes a step of modulating the amplitude of said resulting voltage vector by modulating the amplitude of the voltage output by the DC-DC voltage converter (9).</p> |
