DEVICE FOR CONTROLLING A POLYPHASE ROTATING MACHINE

摘要

The invention concerns a device for controlling a polyphase rotating machine, said machine comprising a stator, a rotor, and sensors, said device being capable of receiving: at least one first sensing signal (V, W, U) representing a position of the rotor relative to the stator and outputted from a first sensor (16 ; 18 ; 14), and a second sensing signal representing said position and phase-shifted relative to the first signal (V, W, U), said second signal being outputted from a second sensor. According to the invention, the control device comprises: means (K, R) for combining the first and the second sensing signals (U, V, W) into a combined signal (K_u; K_v; K_w), said means including at least one controlled switching signal with a variable cyclic ratio, the combined signal (K_u; K_v; K_w) being based on said cyclic ratio and enabling said machine to be controlled.